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| -rw-r--r-- | node_modules/acorn/AUTHORS | 79 | ||||
| -rw-r--r-- | node_modules/acorn/CHANGELOG.md | 508 | ||||
| -rw-r--r-- | node_modules/acorn/LICENSE | 19 | ||||
| -rw-r--r-- | node_modules/acorn/README.md | 467 | ||||
| -rw-r--r-- | node_modules/acorn/bin/_acorn.js | 69 | ||||
| -rwxr-xr-x | node_modules/acorn/bin/acorn | 4 | ||||
| -rw-r--r-- | node_modules/acorn/bin/run_test262.js | 21 | ||||
| -rw-r--r-- | node_modules/acorn/bin/test262.whitelist | 404 | ||||
| -rw-r--r-- | node_modules/acorn/dist/.keep | 0 | ||||
| -rw-r--r-- | node_modules/acorn/dist/acorn.es.js | 5314 | ||||
| -rw-r--r-- | node_modules/acorn/dist/acorn.js | 5345 | ||||
| -rw-r--r-- | node_modules/acorn/dist/acorn_loose.es.js | 1424 | ||||
| -rw-r--r-- | node_modules/acorn/dist/acorn_loose.js | 1434 | ||||
| -rw-r--r-- | node_modules/acorn/dist/walk.es.js | 423 | ||||
| -rw-r--r-- | node_modules/acorn/dist/walk.js | 443 | ||||
| -rw-r--r-- | node_modules/acorn/package.json | 60 |
17 files changed, 16015 insertions, 0 deletions
diff --git a/node_modules/acorn/.bin/acorn b/node_modules/acorn/.bin/acorn new file mode 120000 index 00000000..9c91061e --- /dev/null +++ b/node_modules/acorn/.bin/acorn @@ -0,0 +1 @@ +../bin/acorn
\ No newline at end of file diff --git a/node_modules/acorn/AUTHORS b/node_modules/acorn/AUTHORS new file mode 100644 index 00000000..c5ac22cb --- /dev/null +++ b/node_modules/acorn/AUTHORS @@ -0,0 +1,79 @@ +List of Acorn contributors. Updated before every release. + +Adrian Heine +Adrian Rakovsky +Alistair Braidwood +Amila Welihinda +Andres Suarez +Angelo +Aparajita Fishman +Arian Stolwijk +Artem Govorov +Boopesh Mahendran +Bradley Heinz +Brandon Mills +Charles Hughes +Charmander +Chris McKnight +Conrad Irwin +Daniel Tschinder +David Bonnet +Domenico Matteo +ehmicky +Eugene Obrezkov +Felix Maier +Forbes Lindesay +Gilad Peleg +impinball +Ingvar Stepanyan +Jackson Ray Hamilton +Jesse McCarthy +Jiaxing Wang +Joel Kemp +Johannes Herr +John-David Dalton +Jordan Klassen +Jürg Lehni +Kai Cataldo +keeyipchan +Keheliya Gallaba +Kevin Irish +Kevin Kwok +krator +laosb +luckyzeng +Marek +Marijn Haverbeke +Martin Carlberg +Mat Garcia +Mathias Bynens +Mathieu 'p01' Henri +Matthew Bastien +Max Schaefer +Max Zerzouri +Mihai Bazon +Mike Rennie +naoh +Nicholas C. Zakas +Nick Fitzgerald +Olivier Thomann +Oskar Schöldström +Paul Harper +Peter Rust +PlNG +Prayag Verma +ReadmeCritic +r-e-d +Renée Kooi +Richard Gibson +Rich Harris +Sebastian McKenzie +Shahar Soel +Sheel Bedi +Simen Bekkhus +Teddy Katz +Timothy Gu +Toru Nagashima +Victor Homyakov +Wexpo Lyu +zsjforcn diff --git a/node_modules/acorn/CHANGELOG.md b/node_modules/acorn/CHANGELOG.md new file mode 100644 index 00000000..226c154f --- /dev/null +++ b/node_modules/acorn/CHANGELOG.md @@ -0,0 +1,508 @@ +## 5.7.3 (2018-09-10) + +### Bug fixes + +Fix failure to tokenize regexps after expressions like `x.of`. + +Better error message for unterminated template literals. + +## 5.7.2 (2018-08-24) + +### Bug fixes + +Properly handle `allowAwaitOutsideFunction` in for statements. + +Treat function declarations at the top level of modules like let bindings. + +Don't allow async function declarations as the only statement under a label. + +## 5.7.1 (2018-06-15) + +### Bug fixes + +Make sure the walker and bin files are rebuilt on release (the previous release didn't get the up-to-date versions). + +## 5.7.0 (2018-06-15) + +### Bug fixes + +Fix crash in walker when walking a binding-less catch node. + +### New features + +Upgraded to Unicode 11. + +## 5.6.2 (2018-06-05) + +### Bug fixes + +In the walker, go back to allowing the `baseVisitor` argument to be null to default to the default base everywhere. + +## 5.6.1 (2018-06-01) + +### Bug fixes + +Fix regression when passing `null` as fourth argument to `walk.recursive`. + +## 5.6.0 (2018-05-31) + +### Bug fixes + +Fix a bug in the walker that caused a crash when walking an object pattern spread. + +### New features + +Allow U+2028 and U+2029 in string when ECMAVersion >= 10. + +Allow binding-less catch statements when ECMAVersion >= 10. + +Add `allowAwaitOutsideFunction` option for parsing top-level `await`. + +## 5.5.3 (2018-03-08) + +### Bug fixes + +A _second_ republish of the code in 5.5.1, this time with yarn, to hopefully get valid timestamps. + +## 5.5.2 (2018-03-08) + +### Bug fixes + +A republish of the code in 5.5.1 in an attempt to solve an issue with the file timestamps in the npm package being 0. + +## 5.5.1 (2018-03-06) + +### Bug fixes + +Fix regression in walker causing property values in object patterns to be walked as expressions. + +Fix misleading error message for octal escapes in template strings. + +## 5.5.0 (2018-02-27) + +### Bug fixes + +Support object spread in the AST walker. + +### New features + +The identifier character categorization is now based on Unicode version 10. + +Acorn will now validate the content of regular expressions, including new ES9 features. + +## 5.4.1 (2018-02-02) + +### Bug fixes + +5.4.0 somehow accidentally included an old version of walk.js. + +## 5.4.0 (2018-02-01) + +### Bug fixes + +Disallow duplicate or escaped flags on regular expressions. + +Disallow octal escapes in strings in strict mode. + +### New features + +Add support for async iteration. + +Add support for object spread and rest. + +## 5.3.0 (2017-12-28) + +### Bug fixes + +Fix parsing of floating point literals with leading zeroes in loose mode. + +Allow duplicate property names in object patterns. + +Don't allow static class methods named `prototype`. + +Disallow async functions directly under `if` or `else`. + +Parse right-hand-side of `for`/`of` as an assignment expression. + +Stricter parsing of `for`/`in`. + +Don't allow unicode escapes in contextual keywords. + +### New features + +Parsing class members was factored into smaller methods to allow plugins to hook into it. + +## 5.2.1 (2017-10-30) + +### Bug fixes + +Fix a token context corruption bug. + +## 5.2.0 (2017-10-30) + +### Bug fixes + +Fix token context tracking for `class` and `function` in property-name position. + +Make sure `%*` isn't parsed as a valid operator. + +The `full` and `fullAncestor` walkers no longer visit nodes multiple times. + +Allow shorthand properties `get` and `set` to be followed by default values. + +Disallow `super` when not in callee or object position. + +### New features + +Support [`directive` property](https://github.com/estree/estree/compare/b3de58c9997504d6fba04b72f76e6dd1619ee4eb...1da8e603237144f44710360f8feb7a9977e905e0) on directive expression statements. + +## 5.1.2 (2017-09-04) + +### Bug fixes + +Disable parsing of legacy HTML-style comments in modules. + +Fix parsing of async methods whose names are keywords. + +## 5.1.1 (2017-07-06) + +### Bug fixes + +Fix problem with disambiguating regexp and division after a class. + +## 5.1.0 (2017-07-05) + +### Bug fixes + +Fix tokenizing of regexps in an object-desctructuring `for`/`of` loop and after `yield`. + +Parse zero-prefixed numbers with non-octal digits as decimal. + +Allow object/array patterns in rest parameters. + +Don't error when `yield` is used as a property name. + +Allow `async` as a shorthand object property. + +Make the ES module version of the loose parser actually work. + +### New features + +Implement the [template literal revision proposal](https://github.com/tc39/proposal-template-literal-revision) for ES9. + +New walker functions `full` and `fullAncestor`. + +## 5.0.3 (2017-04-01) + +### Bug fixes + +Fix spurious duplicate variable definition errors for named functions. + +## 5.0.2 (2017-03-30) + +### Bug fixes + +A binary operator after a parenthesized arrow expression is no longer incorrectly treated as an error. + +## 5.0.0 (2017-03-28) + +### Bug fixes + +Raise an error for duplicated lexical bindings. + +Fix spurious error when an assignement expression occurred after a spread expression. + +Accept regular expressions after `of` (in `for`/`of`), `yield` (in a generator), and braced arrow functions. + +Allow labels in front or `var` declarations, even in strict mode. + +### Breaking changes + +Parse declarations following `export default` as declaration nodes, not expressions. This means that class and function declarations nodes can now have `null` as their `id`. + +## 4.0.11 (2017-02-07) + +### Bug fixes + +Allow all forms of member expressions to be parenthesized as lvalue. + +## 4.0.10 (2017-02-07) + +### Bug fixes + +Don't expect semicolons after default-exported functions or classes, +even when they are expressions. + +Check for use of `'use strict'` directives in non-simple parameter +functions, even when already in strict mode. + +## 4.0.9 (2017-02-06) + +### Bug fixes + +Fix incorrect error raised for parenthesized simple assignment +targets, so that `(x) = 1` parses again. + +## 4.0.8 (2017-02-03) + +### Bug fixes + +Solve spurious parenthesized pattern errors by temporarily erring on +the side of accepting programs that our delayed errors don't handle +correctly yet. + +## 4.0.7 (2017-02-02) + +### Bug fixes + +Accept invalidly rejected code like `(x).y = 2` again. + +Don't raise an error when a function _inside_ strict code has a +non-simple parameter list. + +## 4.0.6 (2017-02-02) + +### Bug fixes + +Fix exponential behavior (manifesting itself as a complete hang for +even relatively small source files) introduced by the new 'use strict' +check. + +## 4.0.5 (2017-02-02) + +### Bug fixes + +Disallow parenthesized pattern expressions. + +Allow keywords as export names. + +Don't allow the `async` keyword to be parenthesized. + +Properly raise an error when a keyword contains a character escape. + +Allow `"use strict"` to appear after other string literal expressions. + +Disallow labeled declarations. + +## 4.0.4 (2016-12-19) + +### Bug fixes + +Fix issue with loading acorn_loose.js with an AMD loader. + +Fix crash when `export` was followed by a keyword that can't be +exported. + +## 4.0.3 (2016-08-16) + +### Bug fixes + +Allow regular function declarations inside single-statement `if` +branches in loose mode. Forbid them entirely in strict mode. + +Properly parse properties named `async` in ES2017 mode. + +Fix bug where reserved words were broken in ES2017 mode. + +## 4.0.2 (2016-08-11) + +### Bug fixes + +Don't ignore period or 'e' characters after octal numbers. + +Fix broken parsing for call expressions in default parameter values +of arrow functions. + +## 4.0.1 (2016-08-08) + +### Bug fixes + +Fix false positives in duplicated export name errors. + +## 4.0.0 (2016-08-07) + +### Breaking changes + +The default `ecmaVersion` option value is now 7. + +A number of internal method signatures changed, so plugins might need +to be updated. + +### Bug fixes + +The parser now raises errors on duplicated export names. + +`arguments` and `eval` can now be used in shorthand properties. + +Duplicate parameter names in non-simple argument lists now always +produce an error. + +### New features + +The `ecmaVersion` option now also accepts year-style version numbers +(2015, etc). + +Support for `async`/`await` syntax when `ecmaVersion` is >= 8. + +Support for trailing commas in call expressions when `ecmaVersion` +is >= 8. + +## 3.3.0 (2016-07-25) + +### Bug fixes + +Fix bug in tokenizing of regexp operator after a function declaration. + +Fix parser crash when parsing an array pattern with a hole. + +### New features + +Implement check against complex argument lists in functions that +enable strict mode in ES7. + +## 3.2.0 (2016-06-07) + +### Bug fixes + +Improve handling of lack of unicode regexp support in host +environment. + +Properly reject shorthand properties whose name is a keyword. + +Don't crash when the loose parser is called without options object. + +### New features + +Visitors created with `visit.make` now have their base as _prototype_, +rather than copying properties into a fresh object. + +Make it possible to use `visit.ancestor` with a walk state. + +## 3.1.0 (2016-04-18) + +### Bug fixes + +Fix issue where the loose parser created invalid TemplateElement nodes +for unclosed template literals. + +Properly tokenize the division operator directly after a function +expression. + +Allow trailing comma in destructuring arrays. + +### New features + +The walker now allows defining handlers for `CatchClause` nodes. + +## 3.0.4 (2016-02-25) + +### Fixes + +Allow update expressions as left-hand-side of the ES7 exponential +operator. + +## 3.0.2 (2016-02-10) + +### Fixes + +Fix bug that accidentally made `undefined` a reserved word when +parsing ES7. + +## 3.0.0 (2016-02-10) + +### Breaking changes + +The default value of the `ecmaVersion` option is now 6 (used to be 5). + +Support for comprehension syntax (which was dropped from the draft +spec) has been removed. + +### Fixes + +`let` and `yield` are now “contextual keywords”, meaning you can +mostly use them as identifiers in ES5 non-strict code. + +A parenthesized class or function expression after `export default` is +now parsed correctly. + +### New features + +When `ecmaVersion` is set to 7, Acorn will parse the exponentiation +operator (`**`). + +The identifier character ranges are now based on Unicode 8.0.0. + +Plugins can now override the `raiseRecoverable` method to override the +way non-critical errors are handled. + +## 2.7.0 (2016-01-04) + +### Fixes + +Stop allowing rest parameters in setters. + +Make sure the loose parser always attaches a `local` property to +`ImportNamespaceSpecifier` nodes. + +Disallow `y` rexexp flag in ES5. + +Disallow `\00` and `\000` escapes in strict mode. + +Raise an error when an import name is a reserved word. + +## 2.6.4 (2015-11-12) + +### Fixes + +Fix crash in loose parser when parsing invalid object pattern. + +### New features + +Support plugins in the loose parser. + +## 2.6.2 (2015-11-10) + +### Fixes + +Don't crash when no options object is passed. + +## 2.6.0 (2015-11-09) + +### Fixes + +Add `await` as a reserved word in module sources. + +Disallow `yield` in a parameter default value for a generator. + +Forbid using a comma after a rest pattern in an array destructuring. + +### New features + +Support parsing stdin in command-line tool. + +## 2.5.2 (2015-10-27) + +### Fixes + +Fix bug where the walker walked an exported `let` statement as an +expression. + +## 2.5.0 (2015-10-27) + +### Fixes + +Fix tokenizer support in the command-line tool. + +In the loose parser, don't allow non-string-literals as import +sources. + +Stop allowing `new.target` outside of functions. + +Remove legacy `guard` and `guardedHandler` properties from try nodes. + +Stop allowing multiple `__proto__` properties on an object literal in +strict mode. + +Don't allow rest parameters to be non-identifier patterns. + +Check for duplicate paramter names in arrow functions. diff --git a/node_modules/acorn/LICENSE b/node_modules/acorn/LICENSE new file mode 100644 index 00000000..2c0632b6 --- /dev/null +++ b/node_modules/acorn/LICENSE @@ -0,0 +1,19 @@ +Copyright (C) 2012-2018 by various contributors (see AUTHORS) + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +THE SOFTWARE. diff --git a/node_modules/acorn/README.md b/node_modules/acorn/README.md new file mode 100644 index 00000000..de53f513 --- /dev/null +++ b/node_modules/acorn/README.md @@ -0,0 +1,467 @@ +# Acorn + +[](https://travis-ci.org/acornjs/acorn) +[](https://www.npmjs.com/package/acorn) +[](https://cdnjs.com/libraries/acorn) +[Author funding status: ](https://marijnhaverbeke.nl/fund/) + +A tiny, fast JavaScript parser, written completely in JavaScript. + +## Community + +Acorn is open source software released under an +[MIT license](https://github.com/acornjs/acorn/blob/master/LICENSE). + +You are welcome to +[report bugs](https://github.com/acornjs/acorn/issues) or create pull +requests on [github](https://github.com/acornjs/acorn). For questions +and discussion, please use the +[Tern discussion forum](https://discuss.ternjs.net). + +## Installation + +The easiest way to install acorn is with [`npm`][npm]. + +[npm]: https://www.npmjs.com/ + +```sh +npm install acorn +``` + +Alternately, you can download the source and build acorn yourself: + +```sh +git clone https://github.com/acornjs/acorn.git +cd acorn +npm install +npm run build +``` + +## Components + +When run in a CommonJS (node.js) or AMD environment, exported values +appear in the interfaces exposed by the individual files, as usual. +When loaded in the browser (Acorn works in any JS-enabled browser more +recent than IE5) without any kind of module management, a single +global object `acorn` will be defined, and all the exported properties +will be added to that. + +### Main parser + +This is implemented in `dist/acorn.js`, and is what you get when you +`require("acorn")` in node.js. + +**parse**`(input, options)` is used to parse a JavaScript program. +The `input` parameter is a string, `options` can be undefined or an +object setting some of the options listed below. The return value will +be an abstract syntax tree object as specified by the +[ESTree spec][estree]. + +When encountering a syntax error, the parser will raise a +`SyntaxError` object with a meaningful message. The error object will +have a `pos` property that indicates the character offset at which the +error occurred, and a `loc` object that contains a `{line, column}` +object referring to that same position. + +[estree]: https://github.com/estree/estree + +- **ecmaVersion**: Indicates the ECMAScript version to parse. Must be + either 3, 5, 6 (2015), 7 (2016), 8 (2017), 9 (2018) or 10 (2019, partial + support). This influences support for strict mode, the set of + reserved words, and support for new syntax features. Default is 7. + + **NOTE**: Only 'stage 4' (finalized) ECMAScript features are being + implemented by Acorn. + +- **sourceType**: Indicate the mode the code should be parsed in. Can be + either `"script"` or `"module"`. This influences global strict mode + and parsing of `import` and `export` declarations. + +- **onInsertedSemicolon**: If given a callback, that callback will be + called whenever a missing semicolon is inserted by the parser. The + callback will be given the character offset of the point where the + semicolon is inserted as argument, and if `locations` is on, also a + `{line, column}` object representing this position. + +- **onTrailingComma**: Like `onInsertedSemicolon`, but for trailing + commas. + +- **allowReserved**: If `false`, using a reserved word will generate + an error. Defaults to `true` for `ecmaVersion` 3, `false` for higher + versions. When given the value `"never"`, reserved words and + keywords can also not be used as property names (as in Internet + Explorer's old parser). + +- **allowReturnOutsideFunction**: By default, a return statement at + the top level raises an error. Set this to `true` to accept such + code. + +- **allowImportExportEverywhere**: By default, `import` and `export` + declarations can only appear at a program's top level. Setting this + option to `true` allows them anywhere where a statement is allowed. + +- **allowAwaitOutsideFunction**: By default, `await` expressions can only appear inside `async` functions. Setting this option to `true` allows to have top-level `await` expressions. They are still not allowed in non-`async` functions, though. + +- **allowHashBang**: When this is enabled (off by default), if the + code starts with the characters `#!` (as in a shellscript), the + first line will be treated as a comment. + +- **locations**: When `true`, each node has a `loc` object attached + with `start` and `end` subobjects, each of which contains the + one-based line and zero-based column numbers in `{line, column}` + form. Default is `false`. + +- **onToken**: If a function is passed for this option, each found + token will be passed in same format as tokens returned from + `tokenizer().getToken()`. + + If array is passed, each found token is pushed to it. + + Note that you are not allowed to call the parser from the + callback—that will corrupt its internal state. + +- **onComment**: If a function is passed for this option, whenever a + comment is encountered the function will be called with the + following parameters: + + - `block`: `true` if the comment is a block comment, false if it + is a line comment. + - `text`: The content of the comment. + - `start`: Character offset of the start of the comment. + - `end`: Character offset of the end of the comment. + + When the `locations` options is on, the `{line, column}` locations + of the comment’s start and end are passed as two additional + parameters. + + If array is passed for this option, each found comment is pushed + to it as object in Esprima format: + + ```javascript + { + "type": "Line" | "Block", + "value": "comment text", + "start": Number, + "end": Number, + // If `locations` option is on: + "loc": { + "start": {line: Number, column: Number} + "end": {line: Number, column: Number} + }, + // If `ranges` option is on: + "range": [Number, Number] + } + ``` + + Note that you are not allowed to call the parser from the + callback—that will corrupt its internal state. + +- **ranges**: Nodes have their start and end characters offsets + recorded in `start` and `end` properties (directly on the node, + rather than the `loc` object, which holds line/column data. To also + add a [semi-standardized][range] `range` property holding a + `[start, end]` array with the same numbers, set the `ranges` option + to `true`. + +- **program**: It is possible to parse multiple files into a single + AST by passing the tree produced by parsing the first file as the + `program` option in subsequent parses. This will add the toplevel + forms of the parsed file to the "Program" (top) node of an existing + parse tree. + +- **sourceFile**: When the `locations` option is `true`, you can pass + this option to add a `source` attribute in every node’s `loc` + object. Note that the contents of this option are not examined or + processed in any way; you are free to use whatever format you + choose. + +- **directSourceFile**: Like `sourceFile`, but a `sourceFile` property + will be added (regardless of the `location` option) directly to the + nodes, rather than the `loc` object. + +- **preserveParens**: If this option is `true`, parenthesized expressions + are represented by (non-standard) `ParenthesizedExpression` nodes + that have a single `expression` property containing the expression + inside parentheses. + +[range]: https://bugzilla.mozilla.org/show_bug.cgi?id=745678 + +**parseExpressionAt**`(input, offset, options)` will parse a single +expression in a string, and return its AST. It will not complain if +there is more of the string left after the expression. + +**getLineInfo**`(input, offset)` can be used to get a `{line, +column}` object for a given program string and character offset. + +**tokenizer**`(input, options)` returns an object with a `getToken` +method that can be called repeatedly to get the next token, a `{start, +end, type, value}` object (with added `loc` property when the +`locations` option is enabled and `range` property when the `ranges` +option is enabled). When the token's type is `tokTypes.eof`, you +should stop calling the method, since it will keep returning that same +token forever. + +In ES6 environment, returned result can be used as any other +protocol-compliant iterable: + +```javascript +for (let token of acorn.tokenizer(str)) { + // iterate over the tokens +} + +// transform code to array of tokens: +var tokens = [...acorn.tokenizer(str)]; +``` + +**tokTypes** holds an object mapping names to the token type objects +that end up in the `type` properties of tokens. + +#### Note on using with [Escodegen][escodegen] + +Escodegen supports generating comments from AST, attached in +Esprima-specific format. In order to simulate same format in +Acorn, consider following example: + +```javascript +var comments = [], tokens = []; + +var ast = acorn.parse('var x = 42; // answer', { + // collect ranges for each node + ranges: true, + // collect comments in Esprima's format + onComment: comments, + // collect token ranges + onToken: tokens +}); + +// attach comments using collected information +escodegen.attachComments(ast, comments, tokens); + +// generate code +console.log(escodegen.generate(ast, {comment: true})); +// > 'var x = 42; // answer' +``` + +[escodegen]: https://github.com/estools/escodegen + +### dist/acorn_loose.js ### + +This file implements an error-tolerant parser. It exposes a single +function. The loose parser is accessible in node.js via `require("acorn/dist/acorn_loose")`. + +**parse_dammit**`(input, options)` takes the same arguments and +returns the same syntax tree as the `parse` function in `acorn.js`, +but never raises an error, and will do its best to parse syntactically +invalid code in as meaningful a way as it can. It'll insert identifier +nodes with name `"✖"` as placeholders in places where it can't make +sense of the input. Depends on `acorn.js`, because it uses the same +tokenizer. + +### dist/walk.js ### + +Implements an abstract syntax tree walker. Will store its interface in +`acorn.walk` when loaded without a module system. + +**simple**`(node, visitors, base, state)` does a 'simple' walk over +a tree. `node` should be the AST node to walk, and `visitors` an +object with properties whose names correspond to node types in the +[ESTree spec][estree]. The properties should contain functions +that will be called with the node object and, if applicable the state +at that point. The last two arguments are optional. `base` is a walker +algorithm, and `state` is a start state. The default walker will +simply visit all statements and expressions and not produce a +meaningful state. (An example of a use of state is to track scope at +each point in the tree.) + +```js +const acorn = require("acorn") +const walk = require("acorn/dist/walk") + +walk.simple(acorn.parse("let x = 10"), { + Literal(node) { + console.log(`Found a literal: ${node.value}`) + } +}) +``` + +**ancestor**`(node, visitors, base, state)` does a 'simple' walk over +a tree, building up an array of ancestor nodes (including the current node) +and passing the array to the callbacks as a third parameter. + +```js +const acorn = require("acorn") +const walk = require("acorn/dist/walk") + +walk.ancestor(acorn.parse("foo('hi')"), { + Literal(_, ancestors) { + console.log("This literal's ancestors are:", + ancestors.map(n => n.type)) + } +}) +``` + +**recursive**`(node, state, functions, base)` does a 'recursive' +walk, where the walker functions are responsible for continuing the +walk on the child nodes of their target node. `state` is the start +state, and `functions` should contain an object that maps node types +to walker functions. Such functions are called with `(node, state, c)` +arguments, and can cause the walk to continue on a sub-node by calling +the `c` argument on it with `(node, state)` arguments. The optional +`base` argument provides the fallback walker functions for node types +that aren't handled in the `functions` object. If not given, the +default walkers will be used. + +**make**`(functions, base)` builds a new walker object by using the +walker functions in `functions` and filling in the missing ones by +taking defaults from `base`. + +**full**`(node, callback, base, state)` does a 'full' +walk over a tree, calling the callback with the arguments (node, state, type) +for each node + +**fullAncestor**`(node, callback, base, state)` does a 'full' walk over +a tree, building up an array of ancestor nodes (including the current node) +and passing the array to the callbacks as a third parameter. + +```js +const acorn = require("acorn") +const walk = require("acorn/dist/walk") + +walk.full(acorn.parse("1 + 1"), node => { + console.log(`There's a ${node.type} node at ${node.ch}`) +}) +``` + +**findNodeAt**`(node, start, end, test, base, state)` tries to +locate a node in a tree at the given start and/or end offsets, which +satisfies the predicate `test`. `start` and `end` can be either `null` +(as wildcard) or a number. `test` may be a string (indicating a node +type) or a function that takes `(nodeType, node)` arguments and +returns a boolean indicating whether this node is interesting. `base` +and `state` are optional, and can be used to specify a custom walker. +Nodes are tested from inner to outer, so if two nodes match the +boundaries, the inner one will be preferred. + +**findNodeAround**`(node, pos, test, base, state)` is a lot like +`findNodeAt`, but will match any node that exists 'around' (spanning) +the given position. + +**findNodeAfter**`(node, pos, test, base, state)` is similar to +`findNodeAround`, but will match all nodes *after* the given position +(testing outer nodes before inner nodes). + +## Command line interface + +The `bin/acorn` utility can be used to parse a file from the command +line. It accepts as arguments its input file and the following +options: + +- `--ecma3|--ecma5|--ecma6|--ecma7|--ecma8|--ecma9|--ecma10`: Sets the ECMAScript version + to parse. Default is version 7. + +- `--module`: Sets the parsing mode to `"module"`. Is set to `"script"` otherwise. + +- `--locations`: Attaches a "loc" object to each node with "start" and + "end" subobjects, each of which contains the one-based line and + zero-based column numbers in `{line, column}` form. + +- `--allow-hash-bang`: If the code starts with the characters #! (as in a shellscript), the first line will be treated as a comment. + +- `--compact`: No whitespace is used in the AST output. + +- `--silent`: Do not output the AST, just return the exit status. + +- `--help`: Print the usage information and quit. + +The utility spits out the syntax tree as JSON data. + +## Build system + +Acorn is written in ECMAScript 6, as a set of small modules, in the +project's `src` directory, and compiled down to bigger ECMAScript 3 +files in `dist` using [Browserify](http://browserify.org) and +[Babel](http://babeljs.io/). If you are already using Babel, you can +consider including the modules directly. + +The command-line test runner (`npm test`) uses the ES6 modules. The +browser-based test page (`test/index.html`) uses the compiled modules. +The `bin/build-acorn.js` script builds the latter from the former. + +If you are working on Acorn, you'll probably want to try the code out +directly, without an intermediate build step. In your scripts, you can +register the Babel require shim like this: + + require("babel-core/register") + +That will allow you to directly `require` the ES6 modules. + +## Plugins + +Acorn is designed support allow plugins which, within reasonable +bounds, redefine the way the parser works. Plugins can add new token +types and new tokenizer contexts (if necessary), and extend methods in +the parser object. This is not a clean, elegant API—using it requires +an understanding of Acorn's internals, and plugins are likely to break +whenever those internals are significantly changed. But still, it is +_possible_, in this way, to create parsers for JavaScript dialects +without forking all of Acorn. And in principle it is even possible to +combine such plugins, so that if you have, for example, a plugin for +parsing types and a plugin for parsing JSX-style XML literals, you +could load them both and parse code with both JSX tags and types. + +A plugin should register itself by adding a property to +`acorn.plugins`, which holds a function. Calling `acorn.parse`, a +`plugins` option can be passed, holding an object mapping plugin names +to configuration values (or just `true` for plugins that don't take +options). After the parser object has been created, the initialization +functions for the chosen plugins are called with `(parser, +configValue)` arguments. They are expected to use the `parser.extend` +method to extend parser methods. For example, the `readToken` method +could be extended like this: + +```javascript +parser.extend("readToken", function(nextMethod) { + return function(code) { + console.log("Reading a token!") + return nextMethod.call(this, code) + } +}) +``` + +The `nextMethod` argument passed to `extend`'s second argument is the +previous value of this method, and should usually be called through to +whenever the extended method does not handle the call itself. + +Similarly, the loose parser allows plugins to register themselves via +`acorn.pluginsLoose`. The extension mechanism is the same as for the +normal parser: + +```javascript +looseParser.extend("readToken", function(nextMethod) { + return function() { + console.log("Reading a token in the loose parser!") + return nextMethod.call(this) + } +}) +``` + +### Existing plugins + + - [`acorn-jsx`](https://github.com/RReverser/acorn-jsx): Parse [Facebook JSX syntax extensions](https://github.com/facebook/jsx) + - [`acorn-objj`](https://github.com/cappuccino/acorn-objj): [Objective-J](http://www.cappuccino-project.org/learn/objective-j.html) language parser built as Acorn plugin + + Plugins for ECMAScript proposals: + + - [`acorn-stage3`](https://github.com/acornjs/acorn-stage3): Parse most stage 3 proposals, bundling: + - [`acorn-async-iteration`](https://github.com/acornjs/acorn-async-iteration): Parse [async iteration proposal](https://github.com/tc39/proposal-async-iteration) + - [`acorn-bigint`](https://github.com/acornjs/acorn-bigint): Parse [BigInt proposal](https://github.com/tc39/proposal-bigint) + - [`acorn-class-fields`](https://github.com/acornjs/acorn-class-fields): Parse [class fields proposal](https://github.com/tc39/proposal-class-fields) + - [`acorn-dynamic-import`](https://github.com/kesne/acorn-dynamic-import): Parse [import() proposal](https://github.com/tc39/proposal-dynamic-import) + - [`acorn-import-meta`](https://github.com/acornjs/acorn-import-meta): Parse [import.meta proposal](https://github.com/tc39/proposal-import-meta) + - [`acorn-numeric-separator`](https://github.com/acornjs/acorn-numeric-separator): Parse [numeric separator proposal](https://github.com/tc39/proposal-numeric-separator) + - [`acorn-optional-catch-binding`](https://github.com/acornjs/acorn-optional-catch-binding): Parse [optional catch binding proposal](https://github.com/tc39/proposal-optional-catch-binding) + - [`acorn-private-methods`](https://github.com/acornjs/acorn-private-methods): parse [private methods, getters and setters proposal](https://github.com/tc39/proposal-private-methods) + - [`acorn5-object-spread`](https://github.com/adrianheine/acorn5-object-spread): Parse [Object Rest/Spread Properties proposal](https://github.com/tc39/proposal-object-rest-spread) + - [`acorn-object-rest-spread`](https://github.com/victor-homyakov/acorn-object-rest-spread): Parse [Object Rest/Spread Properties proposal](https://github.com/tc39/proposal-object-rest-spread) + - [`acorn-es7`](https://github.com/angelozerr/acorn-es7): Parse [decorator syntax proposal](https://github.com/wycats/javascript-decorators) + - [`acorn-static-class-property-initializer`](https://github.com/victor-homyakov/acorn-static-class-property-initializer): Partial support for static class properties from [ES Class Fields & Static Properties Proposal](https://github.com/tc39/proposal-class-public-fields) to support static property initializers in [React components written as ES6+ classes](https://babeljs.io/blog/2015/07/07/react-on-es6-plus) diff --git a/node_modules/acorn/bin/_acorn.js b/node_modules/acorn/bin/_acorn.js new file mode 100644 index 00000000..b1b644a1 --- /dev/null +++ b/node_modules/acorn/bin/_acorn.js @@ -0,0 +1,69 @@ +#!/usr/bin/env node +'use strict'; + +var path = require('path'); +var fs = require('fs'); +var acorn = require('../dist/acorn.js'); + +var infile; +var forceFile; +var silent = false; +var compact = false; +var tokenize = false; +var options = {}; + +function help(status) { + var print = (status === 0) ? console.log : console.error; + print("usage: " + path.basename(process.argv[1]) + " [--ecma3|--ecma5|--ecma6|--ecma7|--ecma8|--ecma9|...|--ecma2015|--ecma2016|--ecma2017|--ecma2018|...]"); + print(" [--tokenize] [--locations] [---allow-hash-bang] [--compact] [--silent] [--module] [--help] [--] [infile]"); + process.exit(status); +} + +for (var i = 2; i < process.argv.length; ++i) { + var arg = process.argv[i]; + if ((arg === "-" || arg[0] !== "-") && !infile) { infile = arg; } + else if (arg === "--" && !infile && i + 2 === process.argv.length) { forceFile = infile = process.argv[++i]; } + else if (arg === "--locations") { options.locations = true; } + else if (arg === "--allow-hash-bang") { options.allowHashBang = true; } + else if (arg === "--silent") { silent = true; } + else if (arg === "--compact") { compact = true; } + else if (arg === "--help") { help(0); } + else if (arg === "--tokenize") { tokenize = true; } + else if (arg === "--module") { options.sourceType = "module"; } + else { + var match = arg.match(/^--ecma(\d+)$/); + if (match) + { options.ecmaVersion = +match[1]; } + else + { help(1); } + } +} + +function run(code) { + var result; + try { + if (!tokenize) { + result = acorn.parse(code, options); + } else { + result = []; + var tokenizer$$1 = acorn.tokenizer(code, options), token; + do { + token = tokenizer$$1.getToken(); + result.push(token); + } while (token.type !== acorn.tokTypes.eof) + } + } catch (e) { + console.error(e.message); + process.exit(1); + } + if (!silent) { console.log(JSON.stringify(result, null, compact ? null : 2)); } +} + +if (forceFile || infile && infile !== "-") { + run(fs.readFileSync(infile, "utf8")); +} else { + var code = ""; + process.stdin.resume(); + process.stdin.on("data", function (chunk) { return code += chunk; }); + process.stdin.on("end", function () { return run(code); }); +} diff --git a/node_modules/acorn/bin/acorn b/node_modules/acorn/bin/acorn new file mode 100755 index 00000000..03888d0a --- /dev/null +++ b/node_modules/acorn/bin/acorn @@ -0,0 +1,4 @@ +#!/usr/bin/env node +'use strict'; + +require('./_acorn.js'); diff --git a/node_modules/acorn/bin/run_test262.js b/node_modules/acorn/bin/run_test262.js new file mode 100644 index 00000000..150429a1 --- /dev/null +++ b/node_modules/acorn/bin/run_test262.js @@ -0,0 +1,21 @@ +const fs = require("fs") +const path = require("path") +const run = require("test262-parser-runner") +const parse = require("..").parse + +const unsupportedFeatures = [ + "BigInt", + "class-fields", + "class-fields-private", + "class-fields-public", + "numeric-separator-literal" +]; + +run( + (content, {sourceType}) => parse(content, {sourceType, ecmaVersion: 10}), + { + testsDirectory: path.dirname(require.resolve("test262/package.json")), + skip: test => (test.attrs.features && unsupportedFeatures.some(f => test.attrs.features.includes(f))), + whitelist: fs.readFileSync("./bin/test262.whitelist", "utf8").split("\n").filter(v => v) + } +) diff --git a/node_modules/acorn/bin/test262.whitelist b/node_modules/acorn/bin/test262.whitelist new file mode 100644 index 00000000..c8c6ce4a --- /dev/null +++ b/node_modules/acorn/bin/test262.whitelist @@ -0,0 +1,404 @@ +annexB/language/function-code/block-decl-func-no-skip-try.js (default) +annexB/language/function-code/block-decl-func-skip-early-err-block.js (default) +annexB/language/function-code/block-decl-func-skip-early-err.js (default) +annexB/language/function-code/block-decl-func-skip-early-err-switch.js 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+language/statements/switch/syntax/redeclaration/function-declaration-attempt-to-redeclare-with-class-declaration.js (default) +language/statements/switch/syntax/redeclaration/function-declaration-attempt-to-redeclare-with-class-declaration.js (strict mode) +language/statements/switch/syntax/redeclaration/function-declaration-attempt-to-redeclare-with-function-declaration.js (strict mode) +language/statements/switch/syntax/redeclaration/function-declaration-attempt-to-redeclare-with-generator-declaration.js (default) +language/statements/switch/syntax/redeclaration/function-declaration-attempt-to-redeclare-with-generator-declaration.js (strict mode) +language/statements/switch/syntax/redeclaration/function-declaration-attempt-to-redeclare-with-var-declaration.js (default) +language/statements/switch/syntax/redeclaration/function-declaration-attempt-to-redeclare-with-var-declaration.js (strict mode) +language/statements/switch/syntax/redeclaration/generator-declaration-attempt-to-redeclare-with-async-function-declaration.js (default) +language/statements/switch/syntax/redeclaration/generator-declaration-attempt-to-redeclare-with-async-function-declaration.js (strict mode) +language/statements/switch/syntax/redeclaration/generator-declaration-attempt-to-redeclare-with-class-declaration.js (default) +language/statements/switch/syntax/redeclaration/generator-declaration-attempt-to-redeclare-with-class-declaration.js (strict mode) +language/statements/switch/syntax/redeclaration/generator-declaration-attempt-to-redeclare-with-function-declaration.js (default) +language/statements/switch/syntax/redeclaration/generator-declaration-attempt-to-redeclare-with-function-declaration.js (strict mode) +language/statements/switch/syntax/redeclaration/generator-declaration-attempt-to-redeclare-with-generator-declaration.js (default) +language/statements/switch/syntax/redeclaration/generator-declaration-attempt-to-redeclare-with-generator-declaration.js (strict mode) +language/statements/switch/syntax/redeclaration/generator-declaration-attempt-to-redeclare-with-var-declaration.js (default) +language/statements/switch/syntax/redeclaration/generator-declaration-attempt-to-redeclare-with-var-declaration.js (strict mode) +language/statements/switch/syntax/redeclaration/let-declaration-attempt-to-redeclare-with-class-declaration.js (default) +language/statements/switch/syntax/redeclaration/let-declaration-attempt-to-redeclare-with-class-declaration.js (strict mode) +language/statements/switch/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-async-function-declaration.js (default) +language/statements/switch/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-async-function-declaration.js (strict mode) +language/statements/switch/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-class-declaration.js (default) +language/statements/switch/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-class-declaration.js (strict mode) +language/statements/switch/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-function-declaration.js (default) +language/statements/switch/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-function-declaration.js (strict mode) +language/statements/switch/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-generator-declaration.js (default) +language/statements/switch/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-generator-declaration.js (strict mode) +language/statements/while/labelled-fn-stmt.js (default) +language/statements/while/let-block-with-newline.js (default) +language/statements/while/let-identifier-with-newline.js (default) +language/statements/with/labelled-fn-stmt.js (default) +language/statements/with/let-block-with-newline.js (default) +language/statements/with/let-identifier-with-newline.js (default) +language/white-space/mongolian-vowel-separator.js (default) +language/white-space/mongolian-vowel-separator.js (strict mode) diff --git a/node_modules/acorn/dist/.keep b/node_modules/acorn/dist/.keep new file mode 100644 index 00000000..e69de29b --- /dev/null +++ b/node_modules/acorn/dist/.keep diff --git a/node_modules/acorn/dist/acorn.es.js b/node_modules/acorn/dist/acorn.es.js new file mode 100644 index 00000000..332c3392 --- /dev/null +++ b/node_modules/acorn/dist/acorn.es.js @@ -0,0 +1,5314 @@ +// Reserved word lists for various dialects of the language + +var reservedWords = { + 3: "abstract boolean byte char class double enum export extends final float goto implements import int interface long native package private protected public short static super synchronized throws transient volatile", + 5: "class enum extends super const export import", + 6: "enum", + strict: "implements interface let package private protected public static yield", + strictBind: "eval arguments" +}; + +// And the keywords + +var ecma5AndLessKeywords = "break case catch continue debugger default do else finally for function if return switch throw try var while with null true false instanceof typeof void delete new in this"; + +var keywords = { + 5: ecma5AndLessKeywords, + 6: ecma5AndLessKeywords + " const class extends export import super" +}; + +var keywordRelationalOperator = /^in(stanceof)?$/; + +// ## Character categories + +// Big ugly regular expressions that match characters in the +// whitespace, identifier, and identifier-start categories. These +// are only applied when a character is found to actually have a +// code point above 128. +// Generated by `bin/generate-identifier-regex.js`. + +var nonASCIIidentifierStartChars = "\xaa\xb5\xba\xc0-\xd6\xd8-\xf6\xf8-\u02c1\u02c6-\u02d1\u02e0-\u02e4\u02ec\u02ee\u0370-\u0374\u0376\u0377\u037a-\u037d\u037f\u0386\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03f5\u03f7-\u0481\u048a-\u052f\u0531-\u0556\u0559\u0560-\u0588\u05d0-\u05ea\u05ef-\u05f2\u0620-\u064a\u066e\u066f\u0671-\u06d3\u06d5\u06e5\u06e6\u06ee\u06ef\u06fa-\u06fc\u06ff\u0710\u0712-\u072f\u074d-\u07a5\u07b1\u07ca-\u07ea\u07f4\u07f5\u07fa\u0800-\u0815\u081a\u0824\u0828\u0840-\u0858\u0860-\u086a\u08a0-\u08b4\u08b6-\u08bd\u0904-\u0939\u093d\u0950\u0958-\u0961\u0971-\u0980\u0985-\u098c\u098f\u0990\u0993-\u09a8\u09aa-\u09b0\u09b2\u09b6-\u09b9\u09bd\u09ce\u09dc\u09dd\u09df-\u09e1\u09f0\u09f1\u09fc\u0a05-\u0a0a\u0a0f\u0a10\u0a13-\u0a28\u0a2a-\u0a30\u0a32\u0a33\u0a35\u0a36\u0a38\u0a39\u0a59-\u0a5c\u0a5e\u0a72-\u0a74\u0a85-\u0a8d\u0a8f-\u0a91\u0a93-\u0aa8\u0aaa-\u0ab0\u0ab2\u0ab3\u0ab5-\u0ab9\u0abd\u0ad0\u0ae0\u0ae1\u0af9\u0b05-\u0b0c\u0b0f\u0b10\u0b13-\u0b28\u0b2a-\u0b30\u0b32\u0b33\u0b35-\u0b39\u0b3d\u0b5c\u0b5d\u0b5f-\u0b61\u0b71\u0b83\u0b85-\u0b8a\u0b8e-\u0b90\u0b92-\u0b95\u0b99\u0b9a\u0b9c\u0b9e\u0b9f\u0ba3\u0ba4\u0ba8-\u0baa\u0bae-\u0bb9\u0bd0\u0c05-\u0c0c\u0c0e-\u0c10\u0c12-\u0c28\u0c2a-\u0c39\u0c3d\u0c58-\u0c5a\u0c60\u0c61\u0c80\u0c85-\u0c8c\u0c8e-\u0c90\u0c92-\u0ca8\u0caa-\u0cb3\u0cb5-\u0cb9\u0cbd\u0cde\u0ce0\u0ce1\u0cf1\u0cf2\u0d05-\u0d0c\u0d0e-\u0d10\u0d12-\u0d3a\u0d3d\u0d4e\u0d54-\u0d56\u0d5f-\u0d61\u0d7a-\u0d7f\u0d85-\u0d96\u0d9a-\u0db1\u0db3-\u0dbb\u0dbd\u0dc0-\u0dc6\u0e01-\u0e30\u0e32\u0e33\u0e40-\u0e46\u0e81\u0e82\u0e84\u0e87\u0e88\u0e8a\u0e8d\u0e94-\u0e97\u0e99-\u0e9f\u0ea1-\u0ea3\u0ea5\u0ea7\u0eaa\u0eab\u0ead-\u0eb0\u0eb2\u0eb3\u0ebd\u0ec0-\u0ec4\u0ec6\u0edc-\u0edf\u0f00\u0f40-\u0f47\u0f49-\u0f6c\u0f88-\u0f8c\u1000-\u102a\u103f\u1050-\u1055\u105a-\u105d\u1061\u1065\u1066\u106e-\u1070\u1075-\u1081\u108e\u10a0-\u10c5\u10c7\u10cd\u10d0-\u10fa\u10fc-\u1248\u124a-\u124d\u1250-\u1256\u1258\u125a-\u125d\u1260-\u1288\u128a-\u128d\u1290-\u12b0\u12b2-\u12b5\u12b8-\u12be\u12c0\u12c2-\u12c5\u12c8-\u12d6\u12d8-\u1310\u1312-\u1315\u1318-\u135a\u1380-\u138f\u13a0-\u13f5\u13f8-\u13fd\u1401-\u166c\u166f-\u167f\u1681-\u169a\u16a0-\u16ea\u16ee-\u16f8\u1700-\u170c\u170e-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176c\u176e-\u1770\u1780-\u17b3\u17d7\u17dc\u1820-\u1878\u1880-\u18a8\u18aa\u18b0-\u18f5\u1900-\u191e\u1950-\u196d\u1970-\u1974\u1980-\u19ab\u19b0-\u19c9\u1a00-\u1a16\u1a20-\u1a54\u1aa7\u1b05-\u1b33\u1b45-\u1b4b\u1b83-\u1ba0\u1bae\u1baf\u1bba-\u1be5\u1c00-\u1c23\u1c4d-\u1c4f\u1c5a-\u1c7d\u1c80-\u1c88\u1c90-\u1cba\u1cbd-\u1cbf\u1ce9-\u1cec\u1cee-\u1cf1\u1cf5\u1cf6\u1d00-\u1dbf\u1e00-\u1f15\u1f18-\u1f1d\u1f20-\u1f45\u1f48-\u1f4d\u1f50-\u1f57\u1f59\u1f5b\u1f5d\u1f5f-\u1f7d\u1f80-\u1fb4\u1fb6-\u1fbc\u1fbe\u1fc2-\u1fc4\u1fc6-\u1fcc\u1fd0-\u1fd3\u1fd6-\u1fdb\u1fe0-\u1fec\u1ff2-\u1ff4\u1ff6-\u1ffc\u2071\u207f\u2090-\u209c\u2102\u2107\u210a-\u2113\u2115\u2118-\u211d\u2124\u2126\u2128\u212a-\u2139\u213c-\u213f\u2145-\u2149\u214e\u2160-\u2188\u2c00-\u2c2e\u2c30-\u2c5e\u2c60-\u2ce4\u2ceb-\u2cee\u2cf2\u2cf3\u2d00-\u2d25\u2d27\u2d2d\u2d30-\u2d67\u2d6f\u2d80-\u2d96\u2da0-\u2da6\u2da8-\u2dae\u2db0-\u2db6\u2db8-\u2dbe\u2dc0-\u2dc6\u2dc8-\u2dce\u2dd0-\u2dd6\u2dd8-\u2dde\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303c\u3041-\u3096\u309b-\u309f\u30a1-\u30fa\u30fc-\u30ff\u3105-\u312f\u3131-\u318e\u31a0-\u31ba\u31f0-\u31ff\u3400-\u4db5\u4e00-\u9fef\ua000-\ua48c\ua4d0-\ua4fd\ua500-\ua60c\ua610-\ua61f\ua62a\ua62b\ua640-\ua66e\ua67f-\ua69d\ua6a0-\ua6ef\ua717-\ua71f\ua722-\ua788\ua78b-\ua7b9\ua7f7-\ua801\ua803-\ua805\ua807-\ua80a\ua80c-\ua822\ua840-\ua873\ua882-\ua8b3\ua8f2-\ua8f7\ua8fb\ua8fd\ua8fe\ua90a-\ua925\ua930-\ua946\ua960-\ua97c\ua984-\ua9b2\ua9cf\ua9e0-\ua9e4\ua9e6-\ua9ef\ua9fa-\ua9fe\uaa00-\uaa28\uaa40-\uaa42\uaa44-\uaa4b\uaa60-\uaa76\uaa7a\uaa7e-\uaaaf\uaab1\uaab5\uaab6\uaab9-\uaabd\uaac0\uaac2\uaadb-\uaadd\uaae0-\uaaea\uaaf2-\uaaf4\uab01-\uab06\uab09-\uab0e\uab11-\uab16\uab20-\uab26\uab28-\uab2e\uab30-\uab5a\uab5c-\uab65\uab70-\uabe2\uac00-\ud7a3\ud7b0-\ud7c6\ud7cb-\ud7fb\uf900-\ufa6d\ufa70-\ufad9\ufb00-\ufb06\ufb13-\ufb17\ufb1d\ufb1f-\ufb28\ufb2a-\ufb36\ufb38-\ufb3c\ufb3e\ufb40\ufb41\ufb43\ufb44\ufb46-\ufbb1\ufbd3-\ufd3d\ufd50-\ufd8f\ufd92-\ufdc7\ufdf0-\ufdfb\ufe70-\ufe74\ufe76-\ufefc\uff21-\uff3a\uff41-\uff5a\uff66-\uffbe\uffc2-\uffc7\uffca-\uffcf\uffd2-\uffd7\uffda-\uffdc"; +var nonASCIIidentifierChars = "\u200c\u200d\xb7\u0300-\u036f\u0387\u0483-\u0487\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u0669\u0670\u06d6-\u06dc\u06df-\u06e4\u06e7\u06e8\u06ea-\u06ed\u06f0-\u06f9\u0711\u0730-\u074a\u07a6-\u07b0\u07c0-\u07c9\u07eb-\u07f3\u07fd\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0859-\u085b\u08d3-\u08e1\u08e3-\u0903\u093a-\u093c\u093e-\u094f\u0951-\u0957\u0962\u0963\u0966-\u096f\u0981-\u0983\u09bc\u09be-\u09c4\u09c7\u09c8\u09cb-\u09cd\u09d7\u09e2\u09e3\u09e6-\u09ef\u09fe\u0a01-\u0a03\u0a3c\u0a3e-\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a66-\u0a71\u0a75\u0a81-\u0a83\u0abc\u0abe-\u0ac5\u0ac7-\u0ac9\u0acb-\u0acd\u0ae2\u0ae3\u0ae6-\u0aef\u0afa-\u0aff\u0b01-\u0b03\u0b3c\u0b3e-\u0b44\u0b47\u0b48\u0b4b-\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b66-\u0b6f\u0b82\u0bbe-\u0bc2\u0bc6-\u0bc8\u0bca-\u0bcd\u0bd7\u0be6-\u0bef\u0c00-\u0c04\u0c3e-\u0c44\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0c66-\u0c6f\u0c81-\u0c83\u0cbc\u0cbe-\u0cc4\u0cc6-\u0cc8\u0cca-\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0ce6-\u0cef\u0d00-\u0d03\u0d3b\u0d3c\u0d3e-\u0d44\u0d46-\u0d48\u0d4a-\u0d4d\u0d57\u0d62\u0d63\u0d66-\u0d6f\u0d82\u0d83\u0dca\u0dcf-\u0dd4\u0dd6\u0dd8-\u0ddf\u0de6-\u0def\u0df2\u0df3\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0e50-\u0e59\u0eb1\u0eb4-\u0eb9\u0ebb\u0ebc\u0ec8-\u0ecd\u0ed0-\u0ed9\u0f18\u0f19\u0f20-\u0f29\u0f35\u0f37\u0f39\u0f3e\u0f3f\u0f71-\u0f84\u0f86\u0f87\u0f8d-\u0f97\u0f99-\u0fbc\u0fc6\u102b-\u103e\u1040-\u1049\u1056-\u1059\u105e-\u1060\u1062-\u1064\u1067-\u106d\u1071-\u1074\u1082-\u108d\u108f-\u109d\u135d-\u135f\u1369-\u1371\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b4-\u17d3\u17dd\u17e0-\u17e9\u180b-\u180d\u1810-\u1819\u18a9\u1920-\u192b\u1930-\u193b\u1946-\u194f\u19d0-\u19da\u1a17-\u1a1b\u1a55-\u1a5e\u1a60-\u1a7c\u1a7f-\u1a89\u1a90-\u1a99\u1ab0-\u1abd\u1b00-\u1b04\u1b34-\u1b44\u1b50-\u1b59\u1b6b-\u1b73\u1b80-\u1b82\u1ba1-\u1bad\u1bb0-\u1bb9\u1be6-\u1bf3\u1c24-\u1c37\u1c40-\u1c49\u1c50-\u1c59\u1cd0-\u1cd2\u1cd4-\u1ce8\u1ced\u1cf2-\u1cf4\u1cf7-\u1cf9\u1dc0-\u1df9\u1dfb-\u1dff\u203f\u2040\u2054\u20d0-\u20dc\u20e1\u20e5-\u20f0\u2cef-\u2cf1\u2d7f\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua620-\ua629\ua66f\ua674-\ua67d\ua69e\ua69f\ua6f0\ua6f1\ua802\ua806\ua80b\ua823-\ua827\ua880\ua881\ua8b4-\ua8c5\ua8d0-\ua8d9\ua8e0-\ua8f1\ua8ff-\ua909\ua926-\ua92d\ua947-\ua953\ua980-\ua983\ua9b3-\ua9c0\ua9d0-\ua9d9\ua9e5\ua9f0-\ua9f9\uaa29-\uaa36\uaa43\uaa4c\uaa4d\uaa50-\uaa59\uaa7b-\uaa7d\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uaaeb-\uaaef\uaaf5\uaaf6\uabe3-\uabea\uabec\uabed\uabf0-\uabf9\ufb1e\ufe00-\ufe0f\ufe20-\ufe2f\ufe33\ufe34\ufe4d-\ufe4f\uff10-\uff19\uff3f"; + +var nonASCIIidentifierStart = new RegExp("[" + nonASCIIidentifierStartChars + "]"); +var nonASCIIidentifier = new RegExp("[" + nonASCIIidentifierStartChars + nonASCIIidentifierChars + "]"); + +nonASCIIidentifierStartChars = nonASCIIidentifierChars = null; + +// These are a run-length and offset encoded representation of the +// >0xffff code points that are a valid part of identifiers. The +// offset starts at 0x10000, and each pair of numbers represents an +// offset to the next range, and then a size of the range. They were +// generated by bin/generate-identifier-regex.js + +// eslint-disable-next-line comma-spacing +var astralIdentifierStartCodes = [0,11,2,25,2,18,2,1,2,14,3,13,35,122,70,52,268,28,4,48,48,31,14,29,6,37,11,29,3,35,5,7,2,4,43,157,19,35,5,35,5,39,9,51,157,310,10,21,11,7,153,5,3,0,2,43,2,1,4,0,3,22,11,22,10,30,66,18,2,1,11,21,11,25,71,55,7,1,65,0,16,3,2,2,2,28,43,28,4,28,36,7,2,27,28,53,11,21,11,18,14,17,111,72,56,50,14,50,14,35,477,28,11,0,9,21,190,52,76,44,33,24,27,35,30,0,12,34,4,0,13,47,15,3,22,0,2,0,36,17,2,24,85,6,2,0,2,3,2,14,2,9,8,46,39,7,3,1,3,21,2,6,2,1,2,4,4,0,19,0,13,4,159,52,19,3,54,47,21,1,2,0,185,46,42,3,37,47,21,0,60,42,86,26,230,43,117,63,32,0,257,0,11,39,8,0,22,0,12,39,3,3,20,0,35,56,264,8,2,36,18,0,50,29,113,6,2,1,2,37,22,0,26,5,2,1,2,31,15,0,328,18,270,921,103,110,18,195,2749,1070,4050,582,8634,568,8,30,114,29,19,47,17,3,32,20,6,18,689,63,129,68,12,0,67,12,65,1,31,6129,15,754,9486,286,82,395,2309,106,6,12,4,8,8,9,5991,84,2,70,2,1,3,0,3,1,3,3,2,11,2,0,2,6,2,64,2,3,3,7,2,6,2,27,2,3,2,4,2,0,4,6,2,339,3,24,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,7,4149,196,60,67,1213,3,2,26,2,1,2,0,3,0,2,9,2,3,2,0,2,0,7,0,5,0,2,0,2,0,2,2,2,1,2,0,3,0,2,0,2,0,2,0,2,0,2,1,2,0,3,3,2,6,2,3,2,3,2,0,2,9,2,16,6,2,2,4,2,16,4421,42710,42,4148,12,221,3,5761,15,7472,3104,541]; + +// eslint-disable-next-line comma-spacing +var astralIdentifierCodes = [509,0,227,0,150,4,294,9,1368,2,2,1,6,3,41,2,5,0,166,1,574,3,9,9,525,10,176,2,54,14,32,9,16,3,46,10,54,9,7,2,37,13,2,9,6,1,45,0,13,2,49,13,9,3,4,9,83,11,7,0,161,11,6,9,7,3,56,1,2,6,3,1,3,2,10,0,11,1,3,6,4,4,193,17,10,9,5,0,82,19,13,9,214,6,3,8,28,1,83,16,16,9,82,12,9,9,84,14,5,9,243,14,166,9,280,9,41,6,2,3,9,0,10,10,47,15,406,7,2,7,17,9,57,21,2,13,123,5,4,0,2,1,2,6,2,0,9,9,49,4,2,1,2,4,9,9,330,3,19306,9,135,4,60,6,26,9,1016,45,17,3,19723,1,5319,4,4,5,9,7,3,6,31,3,149,2,1418,49,513,54,5,49,9,0,15,0,23,4,2,14,1361,6,2,16,3,6,2,1,2,4,2214,6,110,6,6,9,792487,239]; + +// This has a complexity linear to the value of the code. The +// assumption is that looking up astral identifier characters is +// rare. +function isInAstralSet(code, set) { + var pos = 0x10000; + for (var i = 0; i < set.length; i += 2) { + pos += set[i]; + if (pos > code) { return false } + pos += set[i + 1]; + if (pos >= code) { return true } + } +} + +// Test whether a given character code starts an identifier. + +function isIdentifierStart(code, astral) { + if (code < 65) { return code === 36 } + if (code < 91) { return true } + if (code < 97) { return code === 95 } + if (code < 123) { return true } + if (code <= 0xffff) { return code >= 0xaa && nonASCIIidentifierStart.test(String.fromCharCode(code)) } + if (astral === false) { return false } + return isInAstralSet(code, astralIdentifierStartCodes) +} + +// Test whether a given character is part of an identifier. + +function isIdentifierChar(code, astral) { + if (code < 48) { return code === 36 } + if (code < 58) { return true } + if (code < 65) { return false } + if (code < 91) { return true } + if (code < 97) { return code === 95 } + if (code < 123) { return true } + if (code <= 0xffff) { return code >= 0xaa && nonASCIIidentifier.test(String.fromCharCode(code)) } + if (astral === false) { return false } + return isInAstralSet(code, astralIdentifierStartCodes) || isInAstralSet(code, astralIdentifierCodes) +} + +// ## Token types + +// The assignment of fine-grained, information-carrying type objects +// allows the tokenizer to store the information it has about a +// token in a way that is very cheap for the parser to look up. + +// All token type variables start with an underscore, to make them +// easy to recognize. + +// The `beforeExpr` property is used to disambiguate between regular +// expressions and divisions. It is set on all token types that can +// be followed by an expression (thus, a slash after them would be a +// regular expression). +// +// The `startsExpr` property is used to check if the token ends a +// `yield` expression. It is set on all token types that either can +// directly start an expression (like a quotation mark) or can +// continue an expression (like the body of a string). +// +// `isLoop` marks a keyword as starting a loop, which is important +// to know when parsing a label, in order to allow or disallow +// continue jumps to that label. + +var TokenType = function TokenType(label, conf) { + if ( conf === void 0 ) conf = {}; + + this.label = label; + this.keyword = conf.keyword; + this.beforeExpr = !!conf.beforeExpr; + this.startsExpr = !!conf.startsExpr; + this.isLoop = !!conf.isLoop; + this.isAssign = !!conf.isAssign; + this.prefix = !!conf.prefix; + this.postfix = !!conf.postfix; + this.binop = conf.binop || null; + this.updateContext = null; +}; + +function binop(name, prec) { + return new TokenType(name, {beforeExpr: true, binop: prec}) +} +var beforeExpr = {beforeExpr: true}; +var startsExpr = {startsExpr: true}; + +// Map keyword names to token types. + +var keywords$1 = {}; + +// Succinct definitions of keyword token types +function kw(name, options) { + if ( options === void 0 ) options = {}; + + options.keyword = name; + return keywords$1[name] = new TokenType(name, options) +} + +var types = { + num: new TokenType("num", startsExpr), + regexp: new TokenType("regexp", startsExpr), + string: new TokenType("string", startsExpr), + name: new TokenType("name", startsExpr), + eof: new TokenType("eof"), + + // Punctuation token types. + bracketL: new TokenType("[", {beforeExpr: true, startsExpr: true}), + bracketR: new TokenType("]"), + braceL: new TokenType("{", {beforeExpr: true, startsExpr: true}), + braceR: new TokenType("}"), + parenL: new TokenType("(", {beforeExpr: true, startsExpr: true}), + parenR: new TokenType(")"), + comma: new TokenType(",", beforeExpr), + semi: new TokenType(";", beforeExpr), + colon: new TokenType(":", beforeExpr), + dot: new TokenType("."), + question: new TokenType("?", beforeExpr), + arrow: new TokenType("=>", beforeExpr), + template: new TokenType("template"), + invalidTemplate: new TokenType("invalidTemplate"), + ellipsis: new TokenType("...", beforeExpr), + backQuote: new TokenType("`", startsExpr), + dollarBraceL: new TokenType("${", {beforeExpr: true, startsExpr: true}), + + // Operators. These carry several kinds of properties to help the + // parser use them properly (the presence of these properties is + // what categorizes them as operators). + // + // `binop`, when present, specifies that this operator is a binary + // operator, and will refer to its precedence. + // + // `prefix` and `postfix` mark the operator as a prefix or postfix + // unary operator. + // + // `isAssign` marks all of `=`, `+=`, `-=` etcetera, which act as + // binary operators with a very low precedence, that should result + // in AssignmentExpression nodes. + + eq: new TokenType("=", {beforeExpr: true, isAssign: true}), + assign: new TokenType("_=", {beforeExpr: true, isAssign: true}), + incDec: new TokenType("++/--", {prefix: true, postfix: true, startsExpr: true}), + prefix: new TokenType("!/~", {beforeExpr: true, prefix: true, startsExpr: true}), + logicalOR: binop("||", 1), + logicalAND: binop("&&", 2), + bitwiseOR: binop("|", 3), + bitwiseXOR: binop("^", 4), + bitwiseAND: binop("&", 5), + equality: binop("==/!=/===/!==", 6), + relational: binop("</>/<=/>=", 7), + bitShift: binop("<</>>/>>>", 8), + plusMin: new TokenType("+/-", {beforeExpr: true, binop: 9, prefix: true, startsExpr: true}), + modulo: binop("%", 10), + star: binop("*", 10), + slash: binop("/", 10), + starstar: new TokenType("**", {beforeExpr: true}), + + // Keyword token types. + _break: kw("break"), + _case: kw("case", beforeExpr), + _catch: kw("catch"), + _continue: kw("continue"), + _debugger: kw("debugger"), + _default: kw("default", beforeExpr), + _do: kw("do", {isLoop: true, beforeExpr: true}), + _else: kw("else", beforeExpr), + _finally: kw("finally"), + _for: kw("for", {isLoop: true}), + _function: kw("function", startsExpr), + _if: kw("if"), + _return: kw("return", beforeExpr), + _switch: kw("switch"), + _throw: kw("throw", beforeExpr), + _try: kw("try"), + _var: kw("var"), + _const: kw("const"), + _while: kw("while", {isLoop: true}), + _with: kw("with"), + _new: kw("new", {beforeExpr: true, startsExpr: true}), + _this: kw("this", startsExpr), + _super: kw("super", startsExpr), + _class: kw("class", startsExpr), + _extends: kw("extends", beforeExpr), + _export: kw("export"), + _import: kw("import"), + _null: kw("null", startsExpr), + _true: kw("true", startsExpr), + _false: kw("false", startsExpr), + _in: kw("in", {beforeExpr: true, binop: 7}), + _instanceof: kw("instanceof", {beforeExpr: true, binop: 7}), + _typeof: kw("typeof", {beforeExpr: true, prefix: true, startsExpr: true}), + _void: kw("void", {beforeExpr: true, prefix: true, startsExpr: true}), + _delete: kw("delete", {beforeExpr: true, prefix: true, startsExpr: true}) +}; + +// Matches a whole line break (where CRLF is considered a single +// line break). Used to count lines. + +var lineBreak = /\r\n?|\n|\u2028|\u2029/; +var lineBreakG = new RegExp(lineBreak.source, "g"); + +function isNewLine(code, ecma2019String) { + return code === 10 || code === 13 || (!ecma2019String && (code === 0x2028 || code === 0x2029)) +} + +var nonASCIIwhitespace = /[\u1680\u180e\u2000-\u200a\u202f\u205f\u3000\ufeff]/; + +var skipWhiteSpace = /(?:\s|\/\/.*|\/\*[^]*?\*\/)*/g; + +var ref = Object.prototype; +var hasOwnProperty = ref.hasOwnProperty; +var toString = ref.toString; + +// Checks if an object has a property. + +function has(obj, propName) { + return hasOwnProperty.call(obj, propName) +} + +var isArray = Array.isArray || (function (obj) { return ( + toString.call(obj) === "[object Array]" +); }); + +// These are used when `options.locations` is on, for the +// `startLoc` and `endLoc` properties. + +var Position = function Position(line, col) { + this.line = line; + this.column = col; +}; + +Position.prototype.offset = function offset (n) { + return new Position(this.line, this.column + n) +}; + +var SourceLocation = function SourceLocation(p, start, end) { + this.start = start; + this.end = end; + if (p.sourceFile !== null) { this.source = p.sourceFile; } +}; + +// The `getLineInfo` function is mostly useful when the +// `locations` option is off (for performance reasons) and you +// want to find the line/column position for a given character +// offset. `input` should be the code string that the offset refers +// into. + +function getLineInfo(input, offset) { + for (var line = 1, cur = 0;;) { + lineBreakG.lastIndex = cur; + var match = lineBreakG.exec(input); + if (match && match.index < offset) { + ++line; + cur = match.index + match[0].length; + } else { + return new Position(line, offset - cur) + } + } +} + +// A second optional argument can be given to further configure +// the parser process. These options are recognized: + +var defaultOptions = { + // `ecmaVersion` indicates the ECMAScript version to parse. Must + // be either 3, 5, 6 (2015), 7 (2016), or 8 (2017). This influences support + // for strict mode, the set of reserved words, and support for + // new syntax features. The default is 7. + ecmaVersion: 7, + // `sourceType` indicates the mode the code should be parsed in. + // Can be either `"script"` or `"module"`. This influences global + // strict mode and parsing of `import` and `export` declarations. + sourceType: "script", + // `onInsertedSemicolon` can be a callback that will be called + // when a semicolon is automatically inserted. It will be passed + // th position of the comma as an offset, and if `locations` is + // enabled, it is given the location as a `{line, column}` object + // as second argument. + onInsertedSemicolon: null, + // `onTrailingComma` is similar to `onInsertedSemicolon`, but for + // trailing commas. + onTrailingComma: null, + // By default, reserved words are only enforced if ecmaVersion >= 5. + // Set `allowReserved` to a boolean value to explicitly turn this on + // an off. When this option has the value "never", reserved words + // and keywords can also not be used as property names. + allowReserved: null, + // When enabled, a return at the top level is not considered an + // error. + allowReturnOutsideFunction: false, + // When enabled, import/export statements are not constrained to + // appearing at the top of the program. + allowImportExportEverywhere: false, + // When enabled, await identifiers are allowed to appear at the top-level scope, + // but they are still not allowed in non-async functions. + allowAwaitOutsideFunction: false, + // When enabled, hashbang directive in the beginning of file + // is allowed and treated as a line comment. + allowHashBang: false, + // When `locations` is on, `loc` properties holding objects with + // `start` and `end` properties in `{line, column}` form (with + // line being 1-based and column 0-based) will be attached to the + // nodes. + locations: false, + // A function can be passed as `onToken` option, which will + // cause Acorn to call that function with object in the same + // format as tokens returned from `tokenizer().getToken()`. Note + // that you are not allowed to call the parser from the + // callback—that will corrupt its internal state. + onToken: null, + // A function can be passed as `onComment` option, which will + // cause Acorn to call that function with `(block, text, start, + // end)` parameters whenever a comment is skipped. `block` is a + // boolean indicating whether this is a block (`/* */`) comment, + // `text` is the content of the comment, and `start` and `end` are + // character offsets that denote the start and end of the comment. + // When the `locations` option is on, two more parameters are + // passed, the full `{line, column}` locations of the start and + // end of the comments. Note that you are not allowed to call the + // parser from the callback—that will corrupt its internal state. + onComment: null, + // Nodes have their start and end characters offsets recorded in + // `start` and `end` properties (directly on the node, rather than + // the `loc` object, which holds line/column data. To also add a + // [semi-standardized][range] `range` property holding a `[start, + // end]` array with the same numbers, set the `ranges` option to + // `true`. + // + // [range]: https://bugzilla.mozilla.org/show_bug.cgi?id=745678 + ranges: false, + // It is possible to parse multiple files into a single AST by + // passing the tree produced by parsing the first file as + // `program` option in subsequent parses. This will add the + // toplevel forms of the parsed file to the `Program` (top) node + // of an existing parse tree. + program: null, + // When `locations` is on, you can pass this to record the source + // file in every node's `loc` object. + sourceFile: null, + // This value, if given, is stored in every node, whether + // `locations` is on or off. + directSourceFile: null, + // When enabled, parenthesized expressions are represented by + // (non-standard) ParenthesizedExpression nodes + preserveParens: false, + plugins: {} +}; + +// Interpret and default an options object + +function getOptions(opts) { + var options = {}; + + for (var opt in defaultOptions) + { options[opt] = opts && has(opts, opt) ? opts[opt] : defaultOptions[opt]; } + + if (options.ecmaVersion >= 2015) + { options.ecmaVersion -= 2009; } + + if (options.allowReserved == null) + { options.allowReserved = options.ecmaVersion < 5; } + + if (isArray(options.onToken)) { + var tokens = options.onToken; + options.onToken = function (token) { return tokens.push(token); }; + } + if (isArray(options.onComment)) + { options.onComment = pushComment(options, options.onComment); } + + return options +} + +function pushComment(options, array) { + return function(block, text, start, end, startLoc, endLoc) { + var comment = { + type: block ? "Block" : "Line", + value: text, + start: start, + end: end + }; + if (options.locations) + { comment.loc = new SourceLocation(this, startLoc, endLoc); } + if (options.ranges) + { comment.range = [start, end]; } + array.push(comment); + } +} + +// Registered plugins +var plugins = {}; + +function keywordRegexp(words) { + return new RegExp("^(?:" + words.replace(/ /g, "|") + ")$") +} + +var Parser = function Parser(options, input, startPos) { + this.options = options = getOptions(options); + this.sourceFile = options.sourceFile; + this.keywords = keywordRegexp(keywords[options.ecmaVersion >= 6 ? 6 : 5]); + var reserved = ""; + if (!options.allowReserved) { + for (var v = options.ecmaVersion;; v--) + { if (reserved = reservedWords[v]) { break } } + if (options.sourceType === "module") { reserved += " await"; } + } + this.reservedWords = keywordRegexp(reserved); + var reservedStrict = (reserved ? reserved + " " : "") + reservedWords.strict; + this.reservedWordsStrict = keywordRegexp(reservedStrict); + this.reservedWordsStrictBind = keywordRegexp(reservedStrict + " " + reservedWords.strictBind); + this.input = String(input); + + // Used to signal to callers of `readWord1` whether the word + // contained any escape sequences. This is needed because words with + // escape sequences must not be interpreted as keywords. + this.containsEsc = false; + + // Load plugins + this.loadPlugins(options.plugins); + + // Set up token state + + // The current position of the tokenizer in the input. + if (startPos) { + this.pos = startPos; + this.lineStart = this.input.lastIndexOf("\n", startPos - 1) + 1; + this.curLine = this.input.slice(0, this.lineStart).split(lineBreak).length; + } else { + this.pos = this.lineStart = 0; + this.curLine = 1; + } + + // Properties of the current token: + // Its type + this.type = types.eof; + // For tokens that include more information than their type, the value + this.value = null; + // Its start and end offset + this.start = this.end = this.pos; + // And, if locations are used, the {line, column} object + // corresponding to those offsets + this.startLoc = this.endLoc = this.curPosition(); + + // Position information for the previous token + this.lastTokEndLoc = this.lastTokStartLoc = null; + this.lastTokStart = this.lastTokEnd = this.pos; + + // The context stack is used to superficially track syntactic + // context to predict whether a regular expression is allowed in a + // given position. + this.context = this.initialContext(); + this.exprAllowed = true; + + // Figure out if it's a module code. + this.inModule = options.sourceType === "module"; + this.strict = this.inModule || this.strictDirective(this.pos); + + // Used to signify the start of a potential arrow function + this.potentialArrowAt = -1; + + // Flags to track whether we are in a function, a generator, an async function. + this.inFunction = this.inGenerator = this.inAsync = false; + // Positions to delayed-check that yield/await does not exist in default parameters. + this.yieldPos = this.awaitPos = 0; + // Labels in scope. + this.labels = []; + + // If enabled, skip leading hashbang line. + if (this.pos === 0 && options.allowHashBang && this.input.slice(0, 2) === "#!") + { this.skipLineComment(2); } + + // Scope tracking for duplicate variable names (see scope.js) + this.scopeStack = []; + this.enterFunctionScope(); + + // For RegExp validation + this.regexpState = null; +}; + +// DEPRECATED Kept for backwards compatibility until 3.0 in case a plugin uses them +Parser.prototype.isKeyword = function isKeyword (word) { return this.keywords.test(word) }; +Parser.prototype.isReservedWord = function isReservedWord (word) { return this.reservedWords.test(word) }; + +Parser.prototype.extend = function extend (name, f) { + this[name] = f(this[name]); +}; + +Parser.prototype.loadPlugins = function loadPlugins (pluginConfigs) { + var this$1 = this; + + for (var name in pluginConfigs) { + var plugin = plugins[name]; + if (!plugin) { throw new Error("Plugin '" + name + "' not found") } + plugin(this$1, pluginConfigs[name]); + } +}; + +Parser.prototype.parse = function parse () { + var node = this.options.program || this.startNode(); + this.nextToken(); + return this.parseTopLevel(node) +}; + +var pp = Parser.prototype; + +// ## Parser utilities + +var literal = /^(?:'((?:\\.|[^'])*?)'|"((?:\\.|[^"])*?)"|;)/; +pp.strictDirective = function(start) { + var this$1 = this; + + for (;;) { + skipWhiteSpace.lastIndex = start; + start += skipWhiteSpace.exec(this$1.input)[0].length; + var match = literal.exec(this$1.input.slice(start)); + if (!match) { return false } + if ((match[1] || match[2]) === "use strict") { return true } + start += match[0].length; + } +}; + +// Predicate that tests whether the next token is of the given +// type, and if yes, consumes it as a side effect. + +pp.eat = function(type) { + if (this.type === type) { + this.next(); + return true + } else { + return false + } +}; + +// Tests whether parsed token is a contextual keyword. + +pp.isContextual = function(name) { + return this.type === types.name && this.value === name && !this.containsEsc +}; + +// Consumes contextual keyword if possible. + +pp.eatContextual = function(name) { + if (!this.isContextual(name)) { return false } + this.next(); + return true +}; + +// Asserts that following token is given contextual keyword. + +pp.expectContextual = function(name) { + if (!this.eatContextual(name)) { this.unexpected(); } +}; + +// Test whether a semicolon can be inserted at the current position. + +pp.canInsertSemicolon = function() { + return this.type === types.eof || + this.type === types.braceR || + lineBreak.test(this.input.slice(this.lastTokEnd, this.start)) +}; + +pp.insertSemicolon = function() { + if (this.canInsertSemicolon()) { + if (this.options.onInsertedSemicolon) + { this.options.onInsertedSemicolon(this.lastTokEnd, this.lastTokEndLoc); } + return true + } +}; + +// Consume a semicolon, or, failing that, see if we are allowed to +// pretend that there is a semicolon at this position. + +pp.semicolon = function() { + if (!this.eat(types.semi) && !this.insertSemicolon()) { this.unexpected(); } +}; + +pp.afterTrailingComma = function(tokType, notNext) { + if (this.type === tokType) { + if (this.options.onTrailingComma) + { this.options.onTrailingComma(this.lastTokStart, this.lastTokStartLoc); } + if (!notNext) + { this.next(); } + return true + } +}; + +// Expect a token of a given type. If found, consume it, otherwise, +// raise an unexpected token error. + +pp.expect = function(type) { + this.eat(type) || this.unexpected(); +}; + +// Raise an unexpected token error. + +pp.unexpected = function(pos) { + this.raise(pos != null ? pos : this.start, "Unexpected token"); +}; + +function DestructuringErrors() { + this.shorthandAssign = + this.trailingComma = + this.parenthesizedAssign = + this.parenthesizedBind = + this.doubleProto = + -1; +} + +pp.checkPatternErrors = function(refDestructuringErrors, isAssign) { + if (!refDestructuringErrors) { return } + if (refDestructuringErrors.trailingComma > -1) + { this.raiseRecoverable(refDestructuringErrors.trailingComma, "Comma is not permitted after the rest element"); } + var parens = isAssign ? refDestructuringErrors.parenthesizedAssign : refDestructuringErrors.parenthesizedBind; + if (parens > -1) { this.raiseRecoverable(parens, "Parenthesized pattern"); } +}; + +pp.checkExpressionErrors = function(refDestructuringErrors, andThrow) { + if (!refDestructuringErrors) { return false } + var shorthandAssign = refDestructuringErrors.shorthandAssign; + var doubleProto = refDestructuringErrors.doubleProto; + if (!andThrow) { return shorthandAssign >= 0 || doubleProto >= 0 } + if (shorthandAssign >= 0) + { this.raise(shorthandAssign, "Shorthand property assignments are valid only in destructuring patterns"); } + if (doubleProto >= 0) + { this.raiseRecoverable(doubleProto, "Redefinition of __proto__ property"); } +}; + +pp.checkYieldAwaitInDefaultParams = function() { + if (this.yieldPos && (!this.awaitPos || this.yieldPos < this.awaitPos)) + { this.raise(this.yieldPos, "Yield expression cannot be a default value"); } + if (this.awaitPos) + { this.raise(this.awaitPos, "Await expression cannot be a default value"); } +}; + +pp.isSimpleAssignTarget = function(expr) { + if (expr.type === "ParenthesizedExpression") + { return this.isSimpleAssignTarget(expr.expression) } + return expr.type === "Identifier" || expr.type === "MemberExpression" +}; + +var pp$1 = Parser.prototype; + +// ### Statement parsing + +// Parse a program. Initializes the parser, reads any number of +// statements, and wraps them in a Program node. Optionally takes a +// `program` argument. If present, the statements will be appended +// to its body instead of creating a new node. + +pp$1.parseTopLevel = function(node) { + var this$1 = this; + + var exports = {}; + if (!node.body) { node.body = []; } + while (this.type !== types.eof) { + var stmt = this$1.parseStatement(true, true, exports); + node.body.push(stmt); + } + this.adaptDirectivePrologue(node.body); + this.next(); + if (this.options.ecmaVersion >= 6) { + node.sourceType = this.options.sourceType; + } + return this.finishNode(node, "Program") +}; + +var loopLabel = {kind: "loop"}; +var switchLabel = {kind: "switch"}; + +pp$1.isLet = function() { + if (this.options.ecmaVersion < 6 || !this.isContextual("let")) { return false } + skipWhiteSpace.lastIndex = this.pos; + var skip = skipWhiteSpace.exec(this.input); + var next = this.pos + skip[0].length, nextCh = this.input.charCodeAt(next); + if (nextCh === 91 || nextCh === 123) { return true } // '{' and '[' + if (isIdentifierStart(nextCh, true)) { + var pos = next + 1; + while (isIdentifierChar(this.input.charCodeAt(pos), true)) { ++pos; } + var ident = this.input.slice(next, pos); + if (!keywordRelationalOperator.test(ident)) { return true } + } + return false +}; + +// check 'async [no LineTerminator here] function' +// - 'async /*foo*/ function' is OK. +// - 'async /*\n*/ function' is invalid. +pp$1.isAsyncFunction = function() { + if (this.options.ecmaVersion < 8 || !this.isContextual("async")) + { return false } + + skipWhiteSpace.lastIndex = this.pos; + var skip = skipWhiteSpace.exec(this.input); + var next = this.pos + skip[0].length; + return !lineBreak.test(this.input.slice(this.pos, next)) && + this.input.slice(next, next + 8) === "function" && + (next + 8 === this.input.length || !isIdentifierChar(this.input.charAt(next + 8))) +}; + +// Parse a single statement. +// +// If expecting a statement and finding a slash operator, parse a +// regular expression literal. This is to handle cases like +// `if (foo) /blah/.exec(foo)`, where looking at the previous token +// does not help. + +pp$1.parseStatement = function(declaration, topLevel, exports) { + var starttype = this.type, node = this.startNode(), kind; + + if (this.isLet()) { + starttype = types._var; + kind = "let"; + } + + // Most types of statements are recognized by the keyword they + // start with. Many are trivial to parse, some require a bit of + // complexity. + + switch (starttype) { + case types._break: case types._continue: return this.parseBreakContinueStatement(node, starttype.keyword) + case types._debugger: return this.parseDebuggerStatement(node) + case types._do: return this.parseDoStatement(node) + case types._for: return this.parseForStatement(node) + case types._function: + if (!declaration && this.options.ecmaVersion >= 6) { this.unexpected(); } + return this.parseFunctionStatement(node, false) + case types._class: + if (!declaration) { this.unexpected(); } + return this.parseClass(node, true) + case types._if: return this.parseIfStatement(node) + case types._return: return this.parseReturnStatement(node) + case types._switch: return this.parseSwitchStatement(node) + case types._throw: return this.parseThrowStatement(node) + case types._try: return this.parseTryStatement(node) + case types._const: case types._var: + kind = kind || this.value; + if (!declaration && kind !== "var") { this.unexpected(); } + return this.parseVarStatement(node, kind) + case types._while: return this.parseWhileStatement(node) + case types._with: return this.parseWithStatement(node) + case types.braceL: return this.parseBlock() + case types.semi: return this.parseEmptyStatement(node) + case types._export: + case types._import: + if (!this.options.allowImportExportEverywhere) { + if (!topLevel) + { this.raise(this.start, "'import' and 'export' may only appear at the top level"); } + if (!this.inModule) + { this.raise(this.start, "'import' and 'export' may appear only with 'sourceType: module'"); } + } + return starttype === types._import ? this.parseImport(node) : this.parseExport(node, exports) + + // If the statement does not start with a statement keyword or a + // brace, it's an ExpressionStatement or LabeledStatement. We + // simply start parsing an expression, and afterwards, if the + // next token is a colon and the expression was a simple + // Identifier node, we switch to interpreting it as a label. + default: + if (this.isAsyncFunction()) { + if (!declaration) { this.unexpected(); } + this.next(); + return this.parseFunctionStatement(node, true) + } + + var maybeName = this.value, expr = this.parseExpression(); + if (starttype === types.name && expr.type === "Identifier" && this.eat(types.colon)) + { return this.parseLabeledStatement(node, maybeName, expr) } + else { return this.parseExpressionStatement(node, expr) } + } +}; + +pp$1.parseBreakContinueStatement = function(node, keyword) { + var this$1 = this; + + var isBreak = keyword === "break"; + this.next(); + if (this.eat(types.semi) || this.insertSemicolon()) { node.label = null; } + else if (this.type !== types.name) { this.unexpected(); } + else { + node.label = this.parseIdent(); + this.semicolon(); + } + + // Verify that there is an actual destination to break or + // continue to. + var i = 0; + for (; i < this.labels.length; ++i) { + var lab = this$1.labels[i]; + if (node.label == null || lab.name === node.label.name) { + if (lab.kind != null && (isBreak || lab.kind === "loop")) { break } + if (node.label && isBreak) { break } + } + } + if (i === this.labels.length) { this.raise(node.start, "Unsyntactic " + keyword); } + return this.finishNode(node, isBreak ? "BreakStatement" : "ContinueStatement") +}; + +pp$1.parseDebuggerStatement = function(node) { + this.next(); + this.semicolon(); + return this.finishNode(node, "DebuggerStatement") +}; + +pp$1.parseDoStatement = function(node) { + this.next(); + this.labels.push(loopLabel); + node.body = this.parseStatement(false); + this.labels.pop(); + this.expect(types._while); + node.test = this.parseParenExpression(); + if (this.options.ecmaVersion >= 6) + { this.eat(types.semi); } + else + { this.semicolon(); } + return this.finishNode(node, "DoWhileStatement") +}; + +// Disambiguating between a `for` and a `for`/`in` or `for`/`of` +// loop is non-trivial. Basically, we have to parse the init `var` +// statement or expression, disallowing the `in` operator (see +// the second parameter to `parseExpression`), and then check +// whether the next token is `in` or `of`. When there is no init +// part (semicolon immediately after the opening parenthesis), it +// is a regular `for` loop. + +pp$1.parseForStatement = function(node) { + this.next(); + var awaitAt = (this.options.ecmaVersion >= 9 && (this.inAsync || (!this.inFunction && this.options.allowAwaitOutsideFunction)) && this.eatContextual("await")) ? this.lastTokStart : -1; + this.labels.push(loopLabel); + this.enterLexicalScope(); + this.expect(types.parenL); + if (this.type === types.semi) { + if (awaitAt > -1) { this.unexpected(awaitAt); } + return this.parseFor(node, null) + } + var isLet = this.isLet(); + if (this.type === types._var || this.type === types._const || isLet) { + var init$1 = this.startNode(), kind = isLet ? "let" : this.value; + this.next(); + this.parseVar(init$1, true, kind); + this.finishNode(init$1, "VariableDeclaration"); + if ((this.type === types._in || (this.options.ecmaVersion >= 6 && this.isContextual("of"))) && init$1.declarations.length === 1 && + !(kind !== "var" && init$1.declarations[0].init)) { + if (this.options.ecmaVersion >= 9) { + if (this.type === types._in) { + if (awaitAt > -1) { this.unexpected(awaitAt); } + } else { node.await = awaitAt > -1; } + } + return this.parseForIn(node, init$1) + } + if (awaitAt > -1) { this.unexpected(awaitAt); } + return this.parseFor(node, init$1) + } + var refDestructuringErrors = new DestructuringErrors; + var init = this.parseExpression(true, refDestructuringErrors); + if (this.type === types._in || (this.options.ecmaVersion >= 6 && this.isContextual("of"))) { + if (this.options.ecmaVersion >= 9) { + if (this.type === types._in) { + if (awaitAt > -1) { this.unexpected(awaitAt); } + } else { node.await = awaitAt > -1; } + } + this.toAssignable(init, false, refDestructuringErrors); + this.checkLVal(init); + return this.parseForIn(node, init) + } else { + this.checkExpressionErrors(refDestructuringErrors, true); + } + if (awaitAt > -1) { this.unexpected(awaitAt); } + return this.parseFor(node, init) +}; + +pp$1.parseFunctionStatement = function(node, isAsync) { + this.next(); + return this.parseFunction(node, true, false, isAsync) +}; + +pp$1.parseIfStatement = function(node) { + this.next(); + node.test = this.parseParenExpression(); + // allow function declarations in branches, but only in non-strict mode + node.consequent = this.parseStatement(!this.strict && this.type === types._function); + node.alternate = this.eat(types._else) ? this.parseStatement(!this.strict && this.type === types._function) : null; + return this.finishNode(node, "IfStatement") +}; + +pp$1.parseReturnStatement = function(node) { + if (!this.inFunction && !this.options.allowReturnOutsideFunction) + { this.raise(this.start, "'return' outside of function"); } + this.next(); + + // In `return` (and `break`/`continue`), the keywords with + // optional arguments, we eagerly look for a semicolon or the + // possibility to insert one. + + if (this.eat(types.semi) || this.insertSemicolon()) { node.argument = null; } + else { node.argument = this.parseExpression(); this.semicolon(); } + return this.finishNode(node, "ReturnStatement") +}; + +pp$1.parseSwitchStatement = function(node) { + var this$1 = this; + + this.next(); + node.discriminant = this.parseParenExpression(); + node.cases = []; + this.expect(types.braceL); + this.labels.push(switchLabel); + this.enterLexicalScope(); + + // Statements under must be grouped (by label) in SwitchCase + // nodes. `cur` is used to keep the node that we are currently + // adding statements to. + + var cur; + for (var sawDefault = false; this.type !== types.braceR;) { + if (this$1.type === types._case || this$1.type === types._default) { + var isCase = this$1.type === types._case; + if (cur) { this$1.finishNode(cur, "SwitchCase"); } + node.cases.push(cur = this$1.startNode()); + cur.consequent = []; + this$1.next(); + if (isCase) { + cur.test = this$1.parseExpression(); + } else { + if (sawDefault) { this$1.raiseRecoverable(this$1.lastTokStart, "Multiple default clauses"); } + sawDefault = true; + cur.test = null; + } + this$1.expect(types.colon); + } else { + if (!cur) { this$1.unexpected(); } + cur.consequent.push(this$1.parseStatement(true)); + } + } + this.exitLexicalScope(); + if (cur) { this.finishNode(cur, "SwitchCase"); } + this.next(); // Closing brace + this.labels.pop(); + return this.finishNode(node, "SwitchStatement") +}; + +pp$1.parseThrowStatement = function(node) { + this.next(); + if (lineBreak.test(this.input.slice(this.lastTokEnd, this.start))) + { this.raise(this.lastTokEnd, "Illegal newline after throw"); } + node.argument = this.parseExpression(); + this.semicolon(); + return this.finishNode(node, "ThrowStatement") +}; + +// Reused empty array added for node fields that are always empty. + +var empty = []; + +pp$1.parseTryStatement = function(node) { + this.next(); + node.block = this.parseBlock(); + node.handler = null; + if (this.type === types._catch) { + var clause = this.startNode(); + this.next(); + if (this.eat(types.parenL)) { + clause.param = this.parseBindingAtom(); + this.enterLexicalScope(); + this.checkLVal(clause.param, "let"); + this.expect(types.parenR); + } else { + if (this.options.ecmaVersion < 10) { this.unexpected(); } + clause.param = null; + this.enterLexicalScope(); + } + clause.body = this.parseBlock(false); + this.exitLexicalScope(); + node.handler = this.finishNode(clause, "CatchClause"); + } + node.finalizer = this.eat(types._finally) ? this.parseBlock() : null; + if (!node.handler && !node.finalizer) + { this.raise(node.start, "Missing catch or finally clause"); } + return this.finishNode(node, "TryStatement") +}; + +pp$1.parseVarStatement = function(node, kind) { + this.next(); + this.parseVar(node, false, kind); + this.semicolon(); + return this.finishNode(node, "VariableDeclaration") +}; + +pp$1.parseWhileStatement = function(node) { + this.next(); + node.test = this.parseParenExpression(); + this.labels.push(loopLabel); + node.body = this.parseStatement(false); + this.labels.pop(); + return this.finishNode(node, "WhileStatement") +}; + +pp$1.parseWithStatement = function(node) { + if (this.strict) { this.raise(this.start, "'with' in strict mode"); } + this.next(); + node.object = this.parseParenExpression(); + node.body = this.parseStatement(false); + return this.finishNode(node, "WithStatement") +}; + +pp$1.parseEmptyStatement = function(node) { + this.next(); + return this.finishNode(node, "EmptyStatement") +}; + +pp$1.parseLabeledStatement = function(node, maybeName, expr) { + var this$1 = this; + + for (var i$1 = 0, list = this$1.labels; i$1 < list.length; i$1 += 1) + { + var label = list[i$1]; + + if (label.name === maybeName) + { this$1.raise(expr.start, "Label '" + maybeName + "' is already declared"); + } } + var kind = this.type.isLoop ? "loop" : this.type === types._switch ? "switch" : null; + for (var i = this.labels.length - 1; i >= 0; i--) { + var label$1 = this$1.labels[i]; + if (label$1.statementStart === node.start) { + // Update information about previous labels on this node + label$1.statementStart = this$1.start; + label$1.kind = kind; + } else { break } + } + this.labels.push({name: maybeName, kind: kind, statementStart: this.start}); + node.body = this.parseStatement(true); + if (node.body.type === "ClassDeclaration" || + node.body.type === "VariableDeclaration" && node.body.kind !== "var" || + node.body.type === "FunctionDeclaration" && (this.strict || node.body.generator || node.body.async)) + { this.raiseRecoverable(node.body.start, "Invalid labeled declaration"); } + this.labels.pop(); + node.label = expr; + return this.finishNode(node, "LabeledStatement") +}; + +pp$1.parseExpressionStatement = function(node, expr) { + node.expression = expr; + this.semicolon(); + return this.finishNode(node, "ExpressionStatement") +}; + +// Parse a semicolon-enclosed block of statements, handling `"use +// strict"` declarations when `allowStrict` is true (used for +// function bodies). + +pp$1.parseBlock = function(createNewLexicalScope) { + var this$1 = this; + if ( createNewLexicalScope === void 0 ) createNewLexicalScope = true; + + var node = this.startNode(); + node.body = []; + this.expect(types.braceL); + if (createNewLexicalScope) { + this.enterLexicalScope(); + } + while (!this.eat(types.braceR)) { + var stmt = this$1.parseStatement(true); + node.body.push(stmt); + } + if (createNewLexicalScope) { + this.exitLexicalScope(); + } + return this.finishNode(node, "BlockStatement") +}; + +// Parse a regular `for` loop. The disambiguation code in +// `parseStatement` will already have parsed the init statement or +// expression. + +pp$1.parseFor = function(node, init) { + node.init = init; + this.expect(types.semi); + node.test = this.type === types.semi ? null : this.parseExpression(); + this.expect(types.semi); + node.update = this.type === types.parenR ? null : this.parseExpression(); + this.expect(types.parenR); + this.exitLexicalScope(); + node.body = this.parseStatement(false); + this.labels.pop(); + return this.finishNode(node, "ForStatement") +}; + +// Parse a `for`/`in` and `for`/`of` loop, which are almost +// same from parser's perspective. + +pp$1.parseForIn = function(node, init) { + var type = this.type === types._in ? "ForInStatement" : "ForOfStatement"; + this.next(); + if (type === "ForInStatement") { + if (init.type === "AssignmentPattern" || + (init.type === "VariableDeclaration" && init.declarations[0].init != null && + (this.strict || init.declarations[0].id.type !== "Identifier"))) + { this.raise(init.start, "Invalid assignment in for-in loop head"); } + } + node.left = init; + node.right = type === "ForInStatement" ? this.parseExpression() : this.parseMaybeAssign(); + this.expect(types.parenR); + this.exitLexicalScope(); + node.body = this.parseStatement(false); + this.labels.pop(); + return this.finishNode(node, type) +}; + +// Parse a list of variable declarations. + +pp$1.parseVar = function(node, isFor, kind) { + var this$1 = this; + + node.declarations = []; + node.kind = kind; + for (;;) { + var decl = this$1.startNode(); + this$1.parseVarId(decl, kind); + if (this$1.eat(types.eq)) { + decl.init = this$1.parseMaybeAssign(isFor); + } else if (kind === "const" && !(this$1.type === types._in || (this$1.options.ecmaVersion >= 6 && this$1.isContextual("of")))) { + this$1.unexpected(); + } else if (decl.id.type !== "Identifier" && !(isFor && (this$1.type === types._in || this$1.isContextual("of")))) { + this$1.raise(this$1.lastTokEnd, "Complex binding patterns require an initialization value"); + } else { + decl.init = null; + } + node.declarations.push(this$1.finishNode(decl, "VariableDeclarator")); + if (!this$1.eat(types.comma)) { break } + } + return node +}; + +pp$1.parseVarId = function(decl, kind) { + decl.id = this.parseBindingAtom(kind); + this.checkLVal(decl.id, kind, false); +}; + +// Parse a function declaration or literal (depending on the +// `isStatement` parameter). + +pp$1.parseFunction = function(node, isStatement, allowExpressionBody, isAsync) { + this.initFunction(node); + if (this.options.ecmaVersion >= 9 || this.options.ecmaVersion >= 6 && !isAsync) + { node.generator = this.eat(types.star); } + if (this.options.ecmaVersion >= 8) + { node.async = !!isAsync; } + + if (isStatement) { + node.id = isStatement === "nullableID" && this.type !== types.name ? null : this.parseIdent(); + if (node.id) { + this.checkLVal(node.id, this.inModule && !this.inFunction ? "let" : "var"); + } + } + + var oldInGen = this.inGenerator, oldInAsync = this.inAsync, + oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldInFunc = this.inFunction; + this.inGenerator = node.generator; + this.inAsync = node.async; + this.yieldPos = 0; + this.awaitPos = 0; + this.inFunction = true; + this.enterFunctionScope(); + + if (!isStatement) + { node.id = this.type === types.name ? this.parseIdent() : null; } + + this.parseFunctionParams(node); + this.parseFunctionBody(node, allowExpressionBody); + + this.inGenerator = oldInGen; + this.inAsync = oldInAsync; + this.yieldPos = oldYieldPos; + this.awaitPos = oldAwaitPos; + this.inFunction = oldInFunc; + return this.finishNode(node, isStatement ? "FunctionDeclaration" : "FunctionExpression") +}; + +pp$1.parseFunctionParams = function(node) { + this.expect(types.parenL); + node.params = this.parseBindingList(types.parenR, false, this.options.ecmaVersion >= 8); + this.checkYieldAwaitInDefaultParams(); +}; + +// Parse a class declaration or literal (depending on the +// `isStatement` parameter). + +pp$1.parseClass = function(node, isStatement) { + var this$1 = this; + + this.next(); + + this.parseClassId(node, isStatement); + this.parseClassSuper(node); + var classBody = this.startNode(); + var hadConstructor = false; + classBody.body = []; + this.expect(types.braceL); + while (!this.eat(types.braceR)) { + var member = this$1.parseClassMember(classBody); + if (member && member.type === "MethodDefinition" && member.kind === "constructor") { + if (hadConstructor) { this$1.raise(member.start, "Duplicate constructor in the same class"); } + hadConstructor = true; + } + } + node.body = this.finishNode(classBody, "ClassBody"); + return this.finishNode(node, isStatement ? "ClassDeclaration" : "ClassExpression") +}; + +pp$1.parseClassMember = function(classBody) { + var this$1 = this; + + if (this.eat(types.semi)) { return null } + + var method = this.startNode(); + var tryContextual = function (k, noLineBreak) { + if ( noLineBreak === void 0 ) noLineBreak = false; + + var start = this$1.start, startLoc = this$1.startLoc; + if (!this$1.eatContextual(k)) { return false } + if (this$1.type !== types.parenL && (!noLineBreak || !this$1.canInsertSemicolon())) { return true } + if (method.key) { this$1.unexpected(); } + method.computed = false; + method.key = this$1.startNodeAt(start, startLoc); + method.key.name = k; + this$1.finishNode(method.key, "Identifier"); + return false + }; + + method.kind = "method"; + method.static = tryContextual("static"); + var isGenerator = this.eat(types.star); + var isAsync = false; + if (!isGenerator) { + if (this.options.ecmaVersion >= 8 && tryContextual("async", true)) { + isAsync = true; + isGenerator = this.options.ecmaVersion >= 9 && this.eat(types.star); + } else if (tryContextual("get")) { + method.kind = "get"; + } else if (tryContextual("set")) { + method.kind = "set"; + } + } + if (!method.key) { this.parsePropertyName(method); } + var key = method.key; + if (!method.computed && !method.static && (key.type === "Identifier" && key.name === "constructor" || + key.type === "Literal" && key.value === "constructor")) { + if (method.kind !== "method") { this.raise(key.start, "Constructor can't have get/set modifier"); } + if (isGenerator) { this.raise(key.start, "Constructor can't be a generator"); } + if (isAsync) { this.raise(key.start, "Constructor can't be an async method"); } + method.kind = "constructor"; + } else if (method.static && key.type === "Identifier" && key.name === "prototype") { + this.raise(key.start, "Classes may not have a static property named prototype"); + } + this.parseClassMethod(classBody, method, isGenerator, isAsync); + if (method.kind === "get" && method.value.params.length !== 0) + { this.raiseRecoverable(method.value.start, "getter should have no params"); } + if (method.kind === "set" && method.value.params.length !== 1) + { this.raiseRecoverable(method.value.start, "setter should have exactly one param"); } + if (method.kind === "set" && method.value.params[0].type === "RestElement") + { this.raiseRecoverable(method.value.params[0].start, "Setter cannot use rest params"); } + return method +}; + +pp$1.parseClassMethod = function(classBody, method, isGenerator, isAsync) { + method.value = this.parseMethod(isGenerator, isAsync); + classBody.body.push(this.finishNode(method, "MethodDefinition")); +}; + +pp$1.parseClassId = function(node, isStatement) { + node.id = this.type === types.name ? this.parseIdent() : isStatement === true ? this.unexpected() : null; +}; + +pp$1.parseClassSuper = function(node) { + node.superClass = this.eat(types._extends) ? this.parseExprSubscripts() : null; +}; + +// Parses module export declaration. + +pp$1.parseExport = function(node, exports) { + var this$1 = this; + + this.next(); + // export * from '...' + if (this.eat(types.star)) { + this.expectContextual("from"); + if (this.type !== types.string) { this.unexpected(); } + node.source = this.parseExprAtom(); + this.semicolon(); + return this.finishNode(node, "ExportAllDeclaration") + } + if (this.eat(types._default)) { // export default ... + this.checkExport(exports, "default", this.lastTokStart); + var isAsync; + if (this.type === types._function || (isAsync = this.isAsyncFunction())) { + var fNode = this.startNode(); + this.next(); + if (isAsync) { this.next(); } + node.declaration = this.parseFunction(fNode, "nullableID", false, isAsync); + } else if (this.type === types._class) { + var cNode = this.startNode(); + node.declaration = this.parseClass(cNode, "nullableID"); + } else { + node.declaration = this.parseMaybeAssign(); + this.semicolon(); + } + return this.finishNode(node, "ExportDefaultDeclaration") + } + // export var|const|let|function|class ... + if (this.shouldParseExportStatement()) { + node.declaration = this.parseStatement(true); + if (node.declaration.type === "VariableDeclaration") + { this.checkVariableExport(exports, node.declaration.declarations); } + else + { this.checkExport(exports, node.declaration.id.name, node.declaration.id.start); } + node.specifiers = []; + node.source = null; + } else { // export { x, y as z } [from '...'] + node.declaration = null; + node.specifiers = this.parseExportSpecifiers(exports); + if (this.eatContextual("from")) { + if (this.type !== types.string) { this.unexpected(); } + node.source = this.parseExprAtom(); + } else { + // check for keywords used as local names + for (var i = 0, list = node.specifiers; i < list.length; i += 1) { + var spec = list[i]; + + this$1.checkUnreserved(spec.local); + } + + node.source = null; + } + this.semicolon(); + } + return this.finishNode(node, "ExportNamedDeclaration") +}; + +pp$1.checkExport = function(exports, name, pos) { + if (!exports) { return } + if (has(exports, name)) + { this.raiseRecoverable(pos, "Duplicate export '" + name + "'"); } + exports[name] = true; +}; + +pp$1.checkPatternExport = function(exports, pat) { + var this$1 = this; + + var type = pat.type; + if (type === "Identifier") + { this.checkExport(exports, pat.name, pat.start); } + else if (type === "ObjectPattern") + { for (var i = 0, list = pat.properties; i < list.length; i += 1) + { + var prop = list[i]; + + this$1.checkPatternExport(exports, prop); + } } + else if (type === "ArrayPattern") + { for (var i$1 = 0, list$1 = pat.elements; i$1 < list$1.length; i$1 += 1) { + var elt = list$1[i$1]; + + if (elt) { this$1.checkPatternExport(exports, elt); } + } } + else if (type === "Property") + { this.checkPatternExport(exports, pat.value); } + else if (type === "AssignmentPattern") + { this.checkPatternExport(exports, pat.left); } + else if (type === "RestElement") + { this.checkPatternExport(exports, pat.argument); } + else if (type === "ParenthesizedExpression") + { this.checkPatternExport(exports, pat.expression); } +}; + +pp$1.checkVariableExport = function(exports, decls) { + var this$1 = this; + + if (!exports) { return } + for (var i = 0, list = decls; i < list.length; i += 1) + { + var decl = list[i]; + + this$1.checkPatternExport(exports, decl.id); + } +}; + +pp$1.shouldParseExportStatement = function() { + return this.type.keyword === "var" || + this.type.keyword === "const" || + this.type.keyword === "class" || + this.type.keyword === "function" || + this.isLet() || + this.isAsyncFunction() +}; + +// Parses a comma-separated list of module exports. + +pp$1.parseExportSpecifiers = function(exports) { + var this$1 = this; + + var nodes = [], first = true; + // export { x, y as z } [from '...'] + this.expect(types.braceL); + while (!this.eat(types.braceR)) { + if (!first) { + this$1.expect(types.comma); + if (this$1.afterTrailingComma(types.braceR)) { break } + } else { first = false; } + + var node = this$1.startNode(); + node.local = this$1.parseIdent(true); + node.exported = this$1.eatContextual("as") ? this$1.parseIdent(true) : node.local; + this$1.checkExport(exports, node.exported.name, node.exported.start); + nodes.push(this$1.finishNode(node, "ExportSpecifier")); + } + return nodes +}; + +// Parses import declaration. + +pp$1.parseImport = function(node) { + this.next(); + // import '...' + if (this.type === types.string) { + node.specifiers = empty; + node.source = this.parseExprAtom(); + } else { + node.specifiers = this.parseImportSpecifiers(); + this.expectContextual("from"); + node.source = this.type === types.string ? this.parseExprAtom() : this.unexpected(); + } + this.semicolon(); + return this.finishNode(node, "ImportDeclaration") +}; + +// Parses a comma-separated list of module imports. + +pp$1.parseImportSpecifiers = function() { + var this$1 = this; + + var nodes = [], first = true; + if (this.type === types.name) { + // import defaultObj, { x, y as z } from '...' + var node = this.startNode(); + node.local = this.parseIdent(); + this.checkLVal(node.local, "let"); + nodes.push(this.finishNode(node, "ImportDefaultSpecifier")); + if (!this.eat(types.comma)) { return nodes } + } + if (this.type === types.star) { + var node$1 = this.startNode(); + this.next(); + this.expectContextual("as"); + node$1.local = this.parseIdent(); + this.checkLVal(node$1.local, "let"); + nodes.push(this.finishNode(node$1, "ImportNamespaceSpecifier")); + return nodes + } + this.expect(types.braceL); + while (!this.eat(types.braceR)) { + if (!first) { + this$1.expect(types.comma); + if (this$1.afterTrailingComma(types.braceR)) { break } + } else { first = false; } + + var node$2 = this$1.startNode(); + node$2.imported = this$1.parseIdent(true); + if (this$1.eatContextual("as")) { + node$2.local = this$1.parseIdent(); + } else { + this$1.checkUnreserved(node$2.imported); + node$2.local = node$2.imported; + } + this$1.checkLVal(node$2.local, "let"); + nodes.push(this$1.finishNode(node$2, "ImportSpecifier")); + } + return nodes +}; + +// Set `ExpressionStatement#directive` property for directive prologues. +pp$1.adaptDirectivePrologue = function(statements) { + for (var i = 0; i < statements.length && this.isDirectiveCandidate(statements[i]); ++i) { + statements[i].directive = statements[i].expression.raw.slice(1, -1); + } +}; +pp$1.isDirectiveCandidate = function(statement) { + return ( + statement.type === "ExpressionStatement" && + statement.expression.type === "Literal" && + typeof statement.expression.value === "string" && + // Reject parenthesized strings. + (this.input[statement.start] === "\"" || this.input[statement.start] === "'") + ) +}; + +var pp$2 = Parser.prototype; + +// Convert existing expression atom to assignable pattern +// if possible. + +pp$2.toAssignable = function(node, isBinding, refDestructuringErrors) { + var this$1 = this; + + if (this.options.ecmaVersion >= 6 && node) { + switch (node.type) { + case "Identifier": + if (this.inAsync && node.name === "await") + { this.raise(node.start, "Can not use 'await' as identifier inside an async function"); } + break + + case "ObjectPattern": + case "ArrayPattern": + case "RestElement": + break + + case "ObjectExpression": + node.type = "ObjectPattern"; + if (refDestructuringErrors) { this.checkPatternErrors(refDestructuringErrors, true); } + for (var i = 0, list = node.properties; i < list.length; i += 1) { + var prop = list[i]; + + this$1.toAssignable(prop, isBinding); + // Early error: + // AssignmentRestProperty[Yield, Await] : + // `...` DestructuringAssignmentTarget[Yield, Await] + // + // It is a Syntax Error if |DestructuringAssignmentTarget| is an |ArrayLiteral| or an |ObjectLiteral|. + if ( + prop.type === "RestElement" && + (prop.argument.type === "ArrayPattern" || prop.argument.type === "ObjectPattern") + ) { + this$1.raise(prop.argument.start, "Unexpected token"); + } + } + break + + case "Property": + // AssignmentProperty has type === "Property" + if (node.kind !== "init") { this.raise(node.key.start, "Object pattern can't contain getter or setter"); } + this.toAssignable(node.value, isBinding); + break + + case "ArrayExpression": + node.type = "ArrayPattern"; + if (refDestructuringErrors) { this.checkPatternErrors(refDestructuringErrors, true); } + this.toAssignableList(node.elements, isBinding); + break + + case "SpreadElement": + node.type = "RestElement"; + this.toAssignable(node.argument, isBinding); + if (node.argument.type === "AssignmentPattern") + { this.raise(node.argument.start, "Rest elements cannot have a default value"); } + break + + case "AssignmentExpression": + if (node.operator !== "=") { this.raise(node.left.end, "Only '=' operator can be used for specifying default value."); } + node.type = "AssignmentPattern"; + delete node.operator; + this.toAssignable(node.left, isBinding); + // falls through to AssignmentPattern + + case "AssignmentPattern": + break + + case "ParenthesizedExpression": + this.toAssignable(node.expression, isBinding); + break + + case "MemberExpression": + if (!isBinding) { break } + + default: + this.raise(node.start, "Assigning to rvalue"); + } + } else if (refDestructuringErrors) { this.checkPatternErrors(refDestructuringErrors, true); } + return node +}; + +// Convert list of expression atoms to binding list. + +pp$2.toAssignableList = function(exprList, isBinding) { + var this$1 = this; + + var end = exprList.length; + for (var i = 0; i < end; i++) { + var elt = exprList[i]; + if (elt) { this$1.toAssignable(elt, isBinding); } + } + if (end) { + var last = exprList[end - 1]; + if (this.options.ecmaVersion === 6 && isBinding && last && last.type === "RestElement" && last.argument.type !== "Identifier") + { this.unexpected(last.argument.start); } + } + return exprList +}; + +// Parses spread element. + +pp$2.parseSpread = function(refDestructuringErrors) { + var node = this.startNode(); + this.next(); + node.argument = this.parseMaybeAssign(false, refDestructuringErrors); + return this.finishNode(node, "SpreadElement") +}; + +pp$2.parseRestBinding = function() { + var node = this.startNode(); + this.next(); + + // RestElement inside of a function parameter must be an identifier + if (this.options.ecmaVersion === 6 && this.type !== types.name) + { this.unexpected(); } + + node.argument = this.parseBindingAtom(); + + return this.finishNode(node, "RestElement") +}; + +// Parses lvalue (assignable) atom. + +pp$2.parseBindingAtom = function() { + if (this.options.ecmaVersion >= 6) { + switch (this.type) { + case types.bracketL: + var node = this.startNode(); + this.next(); + node.elements = this.parseBindingList(types.bracketR, true, true); + return this.finishNode(node, "ArrayPattern") + + case types.braceL: + return this.parseObj(true) + } + } + return this.parseIdent() +}; + +pp$2.parseBindingList = function(close, allowEmpty, allowTrailingComma) { + var this$1 = this; + + var elts = [], first = true; + while (!this.eat(close)) { + if (first) { first = false; } + else { this$1.expect(types.comma); } + if (allowEmpty && this$1.type === types.comma) { + elts.push(null); + } else if (allowTrailingComma && this$1.afterTrailingComma(close)) { + break + } else if (this$1.type === types.ellipsis) { + var rest = this$1.parseRestBinding(); + this$1.parseBindingListItem(rest); + elts.push(rest); + if (this$1.type === types.comma) { this$1.raise(this$1.start, "Comma is not permitted after the rest element"); } + this$1.expect(close); + break + } else { + var elem = this$1.parseMaybeDefault(this$1.start, this$1.startLoc); + this$1.parseBindingListItem(elem); + elts.push(elem); + } + } + return elts +}; + +pp$2.parseBindingListItem = function(param) { + return param +}; + +// Parses assignment pattern around given atom if possible. + +pp$2.parseMaybeDefault = function(startPos, startLoc, left) { + left = left || this.parseBindingAtom(); + if (this.options.ecmaVersion < 6 || !this.eat(types.eq)) { return left } + var node = this.startNodeAt(startPos, startLoc); + node.left = left; + node.right = this.parseMaybeAssign(); + return this.finishNode(node, "AssignmentPattern") +}; + +// Verify that a node is an lval — something that can be assigned +// to. +// bindingType can be either: +// 'var' indicating that the lval creates a 'var' binding +// 'let' indicating that the lval creates a lexical ('let' or 'const') binding +// 'none' indicating that the binding should be checked for illegal identifiers, but not for duplicate references + +pp$2.checkLVal = function(expr, bindingType, checkClashes) { + var this$1 = this; + + switch (expr.type) { + case "Identifier": + if (this.strict && this.reservedWordsStrictBind.test(expr.name)) + { this.raiseRecoverable(expr.start, (bindingType ? "Binding " : "Assigning to ") + expr.name + " in strict mode"); } + if (checkClashes) { + if (has(checkClashes, expr.name)) + { this.raiseRecoverable(expr.start, "Argument name clash"); } + checkClashes[expr.name] = true; + } + if (bindingType && bindingType !== "none") { + if ( + bindingType === "var" && !this.canDeclareVarName(expr.name) || + bindingType !== "var" && !this.canDeclareLexicalName(expr.name) + ) { + this.raiseRecoverable(expr.start, ("Identifier '" + (expr.name) + "' has already been declared")); + } + if (bindingType === "var") { + this.declareVarName(expr.name); + } else { + this.declareLexicalName(expr.name); + } + } + break + + case "MemberExpression": + if (bindingType) { this.raiseRecoverable(expr.start, "Binding member expression"); } + break + + case "ObjectPattern": + for (var i = 0, list = expr.properties; i < list.length; i += 1) + { + var prop = list[i]; + + this$1.checkLVal(prop, bindingType, checkClashes); + } + break + + case "Property": + // AssignmentProperty has type === "Property" + this.checkLVal(expr.value, bindingType, checkClashes); + break + + case "ArrayPattern": + for (var i$1 = 0, list$1 = expr.elements; i$1 < list$1.length; i$1 += 1) { + var elem = list$1[i$1]; + + if (elem) { this$1.checkLVal(elem, bindingType, checkClashes); } + } + break + + case "AssignmentPattern": + this.checkLVal(expr.left, bindingType, checkClashes); + break + + case "RestElement": + this.checkLVal(expr.argument, bindingType, checkClashes); + break + + case "ParenthesizedExpression": + this.checkLVal(expr.expression, bindingType, checkClashes); + break + + default: + this.raise(expr.start, (bindingType ? "Binding" : "Assigning to") + " rvalue"); + } +}; + +// A recursive descent parser operates by defining functions for all +// syntactic elements, and recursively calling those, each function +// advancing the input stream and returning an AST node. Precedence +// of constructs (for example, the fact that `!x[1]` means `!(x[1])` +// instead of `(!x)[1]` is handled by the fact that the parser +// function that parses unary prefix operators is called first, and +// in turn calls the function that parses `[]` subscripts — that +// way, it'll receive the node for `x[1]` already parsed, and wraps +// *that* in the unary operator node. +// +// Acorn uses an [operator precedence parser][opp] to handle binary +// operator precedence, because it is much more compact than using +// the technique outlined above, which uses different, nesting +// functions to specify precedence, for all of the ten binary +// precedence levels that JavaScript defines. +// +// [opp]: http://en.wikipedia.org/wiki/Operator-precedence_parser + +var pp$3 = Parser.prototype; + +// Check if property name clashes with already added. +// Object/class getters and setters are not allowed to clash — +// either with each other or with an init property — and in +// strict mode, init properties are also not allowed to be repeated. + +pp$3.checkPropClash = function(prop, propHash, refDestructuringErrors) { + if (this.options.ecmaVersion >= 9 && prop.type === "SpreadElement") + { return } + if (this.options.ecmaVersion >= 6 && (prop.computed || prop.method || prop.shorthand)) + { return } + var key = prop.key; + var name; + switch (key.type) { + case "Identifier": name = key.name; break + case "Literal": name = String(key.value); break + default: return + } + var kind = prop.kind; + if (this.options.ecmaVersion >= 6) { + if (name === "__proto__" && kind === "init") { + if (propHash.proto) { + if (refDestructuringErrors && refDestructuringErrors.doubleProto < 0) { refDestructuringErrors.doubleProto = key.start; } + // Backwards-compat kludge. Can be removed in version 6.0 + else { this.raiseRecoverable(key.start, "Redefinition of __proto__ property"); } + } + propHash.proto = true; + } + return + } + name = "$" + name; + var other = propHash[name]; + if (other) { + var redefinition; + if (kind === "init") { + redefinition = this.strict && other.init || other.get || other.set; + } else { + redefinition = other.init || other[kind]; + } + if (redefinition) + { this.raiseRecoverable(key.start, "Redefinition of property"); } + } else { + other = propHash[name] = { + init: false, + get: false, + set: false + }; + } + other[kind] = true; +}; + +// ### Expression parsing + +// These nest, from the most general expression type at the top to +// 'atomic', nondivisible expression types at the bottom. Most of +// the functions will simply let the function(s) below them parse, +// and, *if* the syntactic construct they handle is present, wrap +// the AST node that the inner parser gave them in another node. + +// Parse a full expression. The optional arguments are used to +// forbid the `in` operator (in for loops initalization expressions) +// and provide reference for storing '=' operator inside shorthand +// property assignment in contexts where both object expression +// and object pattern might appear (so it's possible to raise +// delayed syntax error at correct position). + +pp$3.parseExpression = function(noIn, refDestructuringErrors) { + var this$1 = this; + + var startPos = this.start, startLoc = this.startLoc; + var expr = this.parseMaybeAssign(noIn, refDestructuringErrors); + if (this.type === types.comma) { + var node = this.startNodeAt(startPos, startLoc); + node.expressions = [expr]; + while (this.eat(types.comma)) { node.expressions.push(this$1.parseMaybeAssign(noIn, refDestructuringErrors)); } + return this.finishNode(node, "SequenceExpression") + } + return expr +}; + +// Parse an assignment expression. This includes applications of +// operators like `+=`. + +pp$3.parseMaybeAssign = function(noIn, refDestructuringErrors, afterLeftParse) { + if (this.inGenerator && this.isContextual("yield")) { return this.parseYield() } + + var ownDestructuringErrors = false, oldParenAssign = -1, oldTrailingComma = -1; + if (refDestructuringErrors) { + oldParenAssign = refDestructuringErrors.parenthesizedAssign; + oldTrailingComma = refDestructuringErrors.trailingComma; + refDestructuringErrors.parenthesizedAssign = refDestructuringErrors.trailingComma = -1; + } else { + refDestructuringErrors = new DestructuringErrors; + ownDestructuringErrors = true; + } + + var startPos = this.start, startLoc = this.startLoc; + if (this.type === types.parenL || this.type === types.name) + { this.potentialArrowAt = this.start; } + var left = this.parseMaybeConditional(noIn, refDestructuringErrors); + if (afterLeftParse) { left = afterLeftParse.call(this, left, startPos, startLoc); } + if (this.type.isAssign) { + var node = this.startNodeAt(startPos, startLoc); + node.operator = this.value; + node.left = this.type === types.eq ? this.toAssignable(left, false, refDestructuringErrors) : left; + if (!ownDestructuringErrors) { DestructuringErrors.call(refDestructuringErrors); } + refDestructuringErrors.shorthandAssign = -1; // reset because shorthand default was used correctly + this.checkLVal(left); + this.next(); + node.right = this.parseMaybeAssign(noIn); + return this.finishNode(node, "AssignmentExpression") + } else { + if (ownDestructuringErrors) { this.checkExpressionErrors(refDestructuringErrors, true); } + } + if (oldParenAssign > -1) { refDestructuringErrors.parenthesizedAssign = oldParenAssign; } + if (oldTrailingComma > -1) { refDestructuringErrors.trailingComma = oldTrailingComma; } + return left +}; + +// Parse a ternary conditional (`?:`) operator. + +pp$3.parseMaybeConditional = function(noIn, refDestructuringErrors) { + var startPos = this.start, startLoc = this.startLoc; + var expr = this.parseExprOps(noIn, refDestructuringErrors); + if (this.checkExpressionErrors(refDestructuringErrors)) { return expr } + if (this.eat(types.question)) { + var node = this.startNodeAt(startPos, startLoc); + node.test = expr; + node.consequent = this.parseMaybeAssign(); + this.expect(types.colon); + node.alternate = this.parseMaybeAssign(noIn); + return this.finishNode(node, "ConditionalExpression") + } + return expr +}; + +// Start the precedence parser. + +pp$3.parseExprOps = function(noIn, refDestructuringErrors) { + var startPos = this.start, startLoc = this.startLoc; + var expr = this.parseMaybeUnary(refDestructuringErrors, false); + if (this.checkExpressionErrors(refDestructuringErrors)) { return expr } + return expr.start === startPos && expr.type === "ArrowFunctionExpression" ? expr : this.parseExprOp(expr, startPos, startLoc, -1, noIn) +}; + +// Parse binary operators with the operator precedence parsing +// algorithm. `left` is the left-hand side of the operator. +// `minPrec` provides context that allows the function to stop and +// defer further parser to one of its callers when it encounters an +// operator that has a lower precedence than the set it is parsing. + +pp$3.parseExprOp = function(left, leftStartPos, leftStartLoc, minPrec, noIn) { + var prec = this.type.binop; + if (prec != null && (!noIn || this.type !== types._in)) { + if (prec > minPrec) { + var logical = this.type === types.logicalOR || this.type === types.logicalAND; + var op = this.value; + this.next(); + var startPos = this.start, startLoc = this.startLoc; + var right = this.parseExprOp(this.parseMaybeUnary(null, false), startPos, startLoc, prec, noIn); + var node = this.buildBinary(leftStartPos, leftStartLoc, left, right, op, logical); + return this.parseExprOp(node, leftStartPos, leftStartLoc, minPrec, noIn) + } + } + return left +}; + +pp$3.buildBinary = function(startPos, startLoc, left, right, op, logical) { + var node = this.startNodeAt(startPos, startLoc); + node.left = left; + node.operator = op; + node.right = right; + return this.finishNode(node, logical ? "LogicalExpression" : "BinaryExpression") +}; + +// Parse unary operators, both prefix and postfix. + +pp$3.parseMaybeUnary = function(refDestructuringErrors, sawUnary) { + var this$1 = this; + + var startPos = this.start, startLoc = this.startLoc, expr; + if (this.isContextual("await") && (this.inAsync || (!this.inFunction && this.options.allowAwaitOutsideFunction))) { + expr = this.parseAwait(); + sawUnary = true; + } else if (this.type.prefix) { + var node = this.startNode(), update = this.type === types.incDec; + node.operator = this.value; + node.prefix = true; + this.next(); + node.argument = this.parseMaybeUnary(null, true); + this.checkExpressionErrors(refDestructuringErrors, true); + if (update) { this.checkLVal(node.argument); } + else if (this.strict && node.operator === "delete" && + node.argument.type === "Identifier") + { this.raiseRecoverable(node.start, "Deleting local variable in strict mode"); } + else { sawUnary = true; } + expr = this.finishNode(node, update ? "UpdateExpression" : "UnaryExpression"); + } else { + expr = this.parseExprSubscripts(refDestructuringErrors); + if (this.checkExpressionErrors(refDestructuringErrors)) { return expr } + while (this.type.postfix && !this.canInsertSemicolon()) { + var node$1 = this$1.startNodeAt(startPos, startLoc); + node$1.operator = this$1.value; + node$1.prefix = false; + node$1.argument = expr; + this$1.checkLVal(expr); + this$1.next(); + expr = this$1.finishNode(node$1, "UpdateExpression"); + } + } + + if (!sawUnary && this.eat(types.starstar)) + { return this.buildBinary(startPos, startLoc, expr, this.parseMaybeUnary(null, false), "**", false) } + else + { return expr } +}; + +// Parse call, dot, and `[]`-subscript expressions. + +pp$3.parseExprSubscripts = function(refDestructuringErrors) { + var startPos = this.start, startLoc = this.startLoc; + var expr = this.parseExprAtom(refDestructuringErrors); + var skipArrowSubscripts = expr.type === "ArrowFunctionExpression" && this.input.slice(this.lastTokStart, this.lastTokEnd) !== ")"; + if (this.checkExpressionErrors(refDestructuringErrors) || skipArrowSubscripts) { return expr } + var result = this.parseSubscripts(expr, startPos, startLoc); + if (refDestructuringErrors && result.type === "MemberExpression") { + if (refDestructuringErrors.parenthesizedAssign >= result.start) { refDestructuringErrors.parenthesizedAssign = -1; } + if (refDestructuringErrors.parenthesizedBind >= result.start) { refDestructuringErrors.parenthesizedBind = -1; } + } + return result +}; + +pp$3.parseSubscripts = function(base, startPos, startLoc, noCalls) { + var this$1 = this; + + var maybeAsyncArrow = this.options.ecmaVersion >= 8 && base.type === "Identifier" && base.name === "async" && + this.lastTokEnd === base.end && !this.canInsertSemicolon() && this.input.slice(base.start, base.end) === "async"; + for (var computed = (void 0);;) { + if ((computed = this$1.eat(types.bracketL)) || this$1.eat(types.dot)) { + var node = this$1.startNodeAt(startPos, startLoc); + node.object = base; + node.property = computed ? this$1.parseExpression() : this$1.parseIdent(true); + node.computed = !!computed; + if (computed) { this$1.expect(types.bracketR); } + base = this$1.finishNode(node, "MemberExpression"); + } else if (!noCalls && this$1.eat(types.parenL)) { + var refDestructuringErrors = new DestructuringErrors, oldYieldPos = this$1.yieldPos, oldAwaitPos = this$1.awaitPos; + this$1.yieldPos = 0; + this$1.awaitPos = 0; + var exprList = this$1.parseExprList(types.parenR, this$1.options.ecmaVersion >= 8, false, refDestructuringErrors); + if (maybeAsyncArrow && !this$1.canInsertSemicolon() && this$1.eat(types.arrow)) { + this$1.checkPatternErrors(refDestructuringErrors, false); + this$1.checkYieldAwaitInDefaultParams(); + this$1.yieldPos = oldYieldPos; + this$1.awaitPos = oldAwaitPos; + return this$1.parseArrowExpression(this$1.startNodeAt(startPos, startLoc), exprList, true) + } + this$1.checkExpressionErrors(refDestructuringErrors, true); + this$1.yieldPos = oldYieldPos || this$1.yieldPos; + this$1.awaitPos = oldAwaitPos || this$1.awaitPos; + var node$1 = this$1.startNodeAt(startPos, startLoc); + node$1.callee = base; + node$1.arguments = exprList; + base = this$1.finishNode(node$1, "CallExpression"); + } else if (this$1.type === types.backQuote) { + var node$2 = this$1.startNodeAt(startPos, startLoc); + node$2.tag = base; + node$2.quasi = this$1.parseTemplate({isTagged: true}); + base = this$1.finishNode(node$2, "TaggedTemplateExpression"); + } else { + return base + } + } +}; + +// Parse an atomic expression — either a single token that is an +// expression, an expression started by a keyword like `function` or +// `new`, or an expression wrapped in punctuation like `()`, `[]`, +// or `{}`. + +pp$3.parseExprAtom = function(refDestructuringErrors) { + var node, canBeArrow = this.potentialArrowAt === this.start; + switch (this.type) { + case types._super: + if (!this.inFunction) + { this.raise(this.start, "'super' outside of function or class"); } + node = this.startNode(); + this.next(); + // The `super` keyword can appear at below: + // SuperProperty: + // super [ Expression ] + // super . IdentifierName + // SuperCall: + // super Arguments + if (this.type !== types.dot && this.type !== types.bracketL && this.type !== types.parenL) + { this.unexpected(); } + return this.finishNode(node, "Super") + + case types._this: + node = this.startNode(); + this.next(); + return this.finishNode(node, "ThisExpression") + + case types.name: + var startPos = this.start, startLoc = this.startLoc, containsEsc = this.containsEsc; + var id = this.parseIdent(this.type !== types.name); + if (this.options.ecmaVersion >= 8 && !containsEsc && id.name === "async" && !this.canInsertSemicolon() && this.eat(types._function)) + { return this.parseFunction(this.startNodeAt(startPos, startLoc), false, false, true) } + if (canBeArrow && !this.canInsertSemicolon()) { + if (this.eat(types.arrow)) + { return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), [id], false) } + if (this.options.ecmaVersion >= 8 && id.name === "async" && this.type === types.name && !containsEsc) { + id = this.parseIdent(); + if (this.canInsertSemicolon() || !this.eat(types.arrow)) + { this.unexpected(); } + return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), [id], true) + } + } + return id + + case types.regexp: + var value = this.value; + node = this.parseLiteral(value.value); + node.regex = {pattern: value.pattern, flags: value.flags}; + return node + + case types.num: case types.string: + return this.parseLiteral(this.value) + + case types._null: case types._true: case types._false: + node = this.startNode(); + node.value = this.type === types._null ? null : this.type === types._true; + node.raw = this.type.keyword; + this.next(); + return this.finishNode(node, "Literal") + + case types.parenL: + var start = this.start, expr = this.parseParenAndDistinguishExpression(canBeArrow); + if (refDestructuringErrors) { + if (refDestructuringErrors.parenthesizedAssign < 0 && !this.isSimpleAssignTarget(expr)) + { refDestructuringErrors.parenthesizedAssign = start; } + if (refDestructuringErrors.parenthesizedBind < 0) + { refDestructuringErrors.parenthesizedBind = start; } + } + return expr + + case types.bracketL: + node = this.startNode(); + this.next(); + node.elements = this.parseExprList(types.bracketR, true, true, refDestructuringErrors); + return this.finishNode(node, "ArrayExpression") + + case types.braceL: + return this.parseObj(false, refDestructuringErrors) + + case types._function: + node = this.startNode(); + this.next(); + return this.parseFunction(node, false) + + case types._class: + return this.parseClass(this.startNode(), false) + + case types._new: + return this.parseNew() + + case types.backQuote: + return this.parseTemplate() + + default: + this.unexpected(); + } +}; + +pp$3.parseLiteral = function(value) { + var node = this.startNode(); + node.value = value; + node.raw = this.input.slice(this.start, this.end); + this.next(); + return this.finishNode(node, "Literal") +}; + +pp$3.parseParenExpression = function() { + this.expect(types.parenL); + var val = this.parseExpression(); + this.expect(types.parenR); + return val +}; + +pp$3.parseParenAndDistinguishExpression = function(canBeArrow) { + var this$1 = this; + + var startPos = this.start, startLoc = this.startLoc, val, allowTrailingComma = this.options.ecmaVersion >= 8; + if (this.options.ecmaVersion >= 6) { + this.next(); + + var innerStartPos = this.start, innerStartLoc = this.startLoc; + var exprList = [], first = true, lastIsComma = false; + var refDestructuringErrors = new DestructuringErrors, oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, spreadStart; + this.yieldPos = 0; + this.awaitPos = 0; + while (this.type !== types.parenR) { + first ? first = false : this$1.expect(types.comma); + if (allowTrailingComma && this$1.afterTrailingComma(types.parenR, true)) { + lastIsComma = true; + break + } else if (this$1.type === types.ellipsis) { + spreadStart = this$1.start; + exprList.push(this$1.parseParenItem(this$1.parseRestBinding())); + if (this$1.type === types.comma) { this$1.raise(this$1.start, "Comma is not permitted after the rest element"); } + break + } else { + exprList.push(this$1.parseMaybeAssign(false, refDestructuringErrors, this$1.parseParenItem)); + } + } + var innerEndPos = this.start, innerEndLoc = this.startLoc; + this.expect(types.parenR); + + if (canBeArrow && !this.canInsertSemicolon() && this.eat(types.arrow)) { + this.checkPatternErrors(refDestructuringErrors, false); + this.checkYieldAwaitInDefaultParams(); + this.yieldPos = oldYieldPos; + this.awaitPos = oldAwaitPos; + return this.parseParenArrowList(startPos, startLoc, exprList) + } + + if (!exprList.length || lastIsComma) { this.unexpected(this.lastTokStart); } + if (spreadStart) { this.unexpected(spreadStart); } + this.checkExpressionErrors(refDestructuringErrors, true); + this.yieldPos = oldYieldPos || this.yieldPos; + this.awaitPos = oldAwaitPos || this.awaitPos; + + if (exprList.length > 1) { + val = this.startNodeAt(innerStartPos, innerStartLoc); + val.expressions = exprList; + this.finishNodeAt(val, "SequenceExpression", innerEndPos, innerEndLoc); + } else { + val = exprList[0]; + } + } else { + val = this.parseParenExpression(); + } + + if (this.options.preserveParens) { + var par = this.startNodeAt(startPos, startLoc); + par.expression = val; + return this.finishNode(par, "ParenthesizedExpression") + } else { + return val + } +}; + +pp$3.parseParenItem = function(item) { + return item +}; + +pp$3.parseParenArrowList = function(startPos, startLoc, exprList) { + return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), exprList) +}; + +// New's precedence is slightly tricky. It must allow its argument to +// be a `[]` or dot subscript expression, but not a call — at least, +// not without wrapping it in parentheses. Thus, it uses the noCalls +// argument to parseSubscripts to prevent it from consuming the +// argument list. + +var empty$1 = []; + +pp$3.parseNew = function() { + var node = this.startNode(); + var meta = this.parseIdent(true); + if (this.options.ecmaVersion >= 6 && this.eat(types.dot)) { + node.meta = meta; + var containsEsc = this.containsEsc; + node.property = this.parseIdent(true); + if (node.property.name !== "target" || containsEsc) + { this.raiseRecoverable(node.property.start, "The only valid meta property for new is new.target"); } + if (!this.inFunction) + { this.raiseRecoverable(node.start, "new.target can only be used in functions"); } + return this.finishNode(node, "MetaProperty") + } + var startPos = this.start, startLoc = this.startLoc; + node.callee = this.parseSubscripts(this.parseExprAtom(), startPos, startLoc, true); + if (this.eat(types.parenL)) { node.arguments = this.parseExprList(types.parenR, this.options.ecmaVersion >= 8, false); } + else { node.arguments = empty$1; } + return this.finishNode(node, "NewExpression") +}; + +// Parse template expression. + +pp$3.parseTemplateElement = function(ref) { + var isTagged = ref.isTagged; + + var elem = this.startNode(); + if (this.type === types.invalidTemplate) { + if (!isTagged) { + this.raiseRecoverable(this.start, "Bad escape sequence in untagged template literal"); + } + elem.value = { + raw: this.value, + cooked: null + }; + } else { + elem.value = { + raw: this.input.slice(this.start, this.end).replace(/\r\n?/g, "\n"), + cooked: this.value + }; + } + this.next(); + elem.tail = this.type === types.backQuote; + return this.finishNode(elem, "TemplateElement") +}; + +pp$3.parseTemplate = function(ref) { + var this$1 = this; + if ( ref === void 0 ) ref = {}; + var isTagged = ref.isTagged; if ( isTagged === void 0 ) isTagged = false; + + var node = this.startNode(); + this.next(); + node.expressions = []; + var curElt = this.parseTemplateElement({isTagged: isTagged}); + node.quasis = [curElt]; + while (!curElt.tail) { + if (this$1.type === types.eof) { this$1.raise(this$1.pos, "Unterminated template literal"); } + this$1.expect(types.dollarBraceL); + node.expressions.push(this$1.parseExpression()); + this$1.expect(types.braceR); + node.quasis.push(curElt = this$1.parseTemplateElement({isTagged: isTagged})); + } + this.next(); + return this.finishNode(node, "TemplateLiteral") +}; + +pp$3.isAsyncProp = function(prop) { + return !prop.computed && prop.key.type === "Identifier" && prop.key.name === "async" && + (this.type === types.name || this.type === types.num || this.type === types.string || this.type === types.bracketL || this.type.keyword || (this.options.ecmaVersion >= 9 && this.type === types.star)) && + !lineBreak.test(this.input.slice(this.lastTokEnd, this.start)) +}; + +// Parse an object literal or binding pattern. + +pp$3.parseObj = function(isPattern, refDestructuringErrors) { + var this$1 = this; + + var node = this.startNode(), first = true, propHash = {}; + node.properties = []; + this.next(); + while (!this.eat(types.braceR)) { + if (!first) { + this$1.expect(types.comma); + if (this$1.afterTrailingComma(types.braceR)) { break } + } else { first = false; } + + var prop = this$1.parseProperty(isPattern, refDestructuringErrors); + if (!isPattern) { this$1.checkPropClash(prop, propHash, refDestructuringErrors); } + node.properties.push(prop); + } + return this.finishNode(node, isPattern ? "ObjectPattern" : "ObjectExpression") +}; + +pp$3.parseProperty = function(isPattern, refDestructuringErrors) { + var prop = this.startNode(), isGenerator, isAsync, startPos, startLoc; + if (this.options.ecmaVersion >= 9 && this.eat(types.ellipsis)) { + if (isPattern) { + prop.argument = this.parseIdent(false); + if (this.type === types.comma) { + this.raise(this.start, "Comma is not permitted after the rest element"); + } + return this.finishNode(prop, "RestElement") + } + // To disallow parenthesized identifier via `this.toAssignable()`. + if (this.type === types.parenL && refDestructuringErrors) { + if (refDestructuringErrors.parenthesizedAssign < 0) { + refDestructuringErrors.parenthesizedAssign = this.start; + } + if (refDestructuringErrors.parenthesizedBind < 0) { + refDestructuringErrors.parenthesizedBind = this.start; + } + } + // Parse argument. + prop.argument = this.parseMaybeAssign(false, refDestructuringErrors); + // To disallow trailing comma via `this.toAssignable()`. + if (this.type === types.comma && refDestructuringErrors && refDestructuringErrors.trailingComma < 0) { + refDestructuringErrors.trailingComma = this.start; + } + // Finish + return this.finishNode(prop, "SpreadElement") + } + if (this.options.ecmaVersion >= 6) { + prop.method = false; + prop.shorthand = false; + if (isPattern || refDestructuringErrors) { + startPos = this.start; + startLoc = this.startLoc; + } + if (!isPattern) + { isGenerator = this.eat(types.star); } + } + var containsEsc = this.containsEsc; + this.parsePropertyName(prop); + if (!isPattern && !containsEsc && this.options.ecmaVersion >= 8 && !isGenerator && this.isAsyncProp(prop)) { + isAsync = true; + isGenerator = this.options.ecmaVersion >= 9 && this.eat(types.star); + this.parsePropertyName(prop, refDestructuringErrors); + } else { + isAsync = false; + } + this.parsePropertyValue(prop, isPattern, isGenerator, isAsync, startPos, startLoc, refDestructuringErrors, containsEsc); + return this.finishNode(prop, "Property") +}; + +pp$3.parsePropertyValue = function(prop, isPattern, isGenerator, isAsync, startPos, startLoc, refDestructuringErrors, containsEsc) { + if ((isGenerator || isAsync) && this.type === types.colon) + { this.unexpected(); } + + if (this.eat(types.colon)) { + prop.value = isPattern ? this.parseMaybeDefault(this.start, this.startLoc) : this.parseMaybeAssign(false, refDestructuringErrors); + prop.kind = "init"; + } else if (this.options.ecmaVersion >= 6 && this.type === types.parenL) { + if (isPattern) { this.unexpected(); } + prop.kind = "init"; + prop.method = true; + prop.value = this.parseMethod(isGenerator, isAsync); + } else if (!isPattern && !containsEsc && + this.options.ecmaVersion >= 5 && !prop.computed && prop.key.type === "Identifier" && + (prop.key.name === "get" || prop.key.name === "set") && + (this.type !== types.comma && this.type !== types.braceR)) { + if (isGenerator || isAsync) { this.unexpected(); } + prop.kind = prop.key.name; + this.parsePropertyName(prop); + prop.value = this.parseMethod(false); + var paramCount = prop.kind === "get" ? 0 : 1; + if (prop.value.params.length !== paramCount) { + var start = prop.value.start; + if (prop.kind === "get") + { this.raiseRecoverable(start, "getter should have no params"); } + else + { this.raiseRecoverable(start, "setter should have exactly one param"); } + } else { + if (prop.kind === "set" && prop.value.params[0].type === "RestElement") + { this.raiseRecoverable(prop.value.params[0].start, "Setter cannot use rest params"); } + } + } else if (this.options.ecmaVersion >= 6 && !prop.computed && prop.key.type === "Identifier") { + this.checkUnreserved(prop.key); + prop.kind = "init"; + if (isPattern) { + prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key); + } else if (this.type === types.eq && refDestructuringErrors) { + if (refDestructuringErrors.shorthandAssign < 0) + { refDestructuringErrors.shorthandAssign = this.start; } + prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key); + } else { + prop.value = prop.key; + } + prop.shorthand = true; + } else { this.unexpected(); } +}; + +pp$3.parsePropertyName = function(prop) { + if (this.options.ecmaVersion >= 6) { + if (this.eat(types.bracketL)) { + prop.computed = true; + prop.key = this.parseMaybeAssign(); + this.expect(types.bracketR); + return prop.key + } else { + prop.computed = false; + } + } + return prop.key = this.type === types.num || this.type === types.string ? this.parseExprAtom() : this.parseIdent(true) +}; + +// Initialize empty function node. + +pp$3.initFunction = function(node) { + node.id = null; + if (this.options.ecmaVersion >= 6) { + node.generator = false; + node.expression = false; + } + if (this.options.ecmaVersion >= 8) + { node.async = false; } +}; + +// Parse object or class method. + +pp$3.parseMethod = function(isGenerator, isAsync) { + var node = this.startNode(), oldInGen = this.inGenerator, oldInAsync = this.inAsync, + oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldInFunc = this.inFunction; + + this.initFunction(node); + if (this.options.ecmaVersion >= 6) + { node.generator = isGenerator; } + if (this.options.ecmaVersion >= 8) + { node.async = !!isAsync; } + + this.inGenerator = node.generator; + this.inAsync = node.async; + this.yieldPos = 0; + this.awaitPos = 0; + this.inFunction = true; + this.enterFunctionScope(); + + this.expect(types.parenL); + node.params = this.parseBindingList(types.parenR, false, this.options.ecmaVersion >= 8); + this.checkYieldAwaitInDefaultParams(); + this.parseFunctionBody(node, false); + + this.inGenerator = oldInGen; + this.inAsync = oldInAsync; + this.yieldPos = oldYieldPos; + this.awaitPos = oldAwaitPos; + this.inFunction = oldInFunc; + return this.finishNode(node, "FunctionExpression") +}; + +// Parse arrow function expression with given parameters. + +pp$3.parseArrowExpression = function(node, params, isAsync) { + var oldInGen = this.inGenerator, oldInAsync = this.inAsync, + oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldInFunc = this.inFunction; + + this.enterFunctionScope(); + this.initFunction(node); + if (this.options.ecmaVersion >= 8) + { node.async = !!isAsync; } + + this.inGenerator = false; + this.inAsync = node.async; + this.yieldPos = 0; + this.awaitPos = 0; + this.inFunction = true; + + node.params = this.toAssignableList(params, true); + this.parseFunctionBody(node, true); + + this.inGenerator = oldInGen; + this.inAsync = oldInAsync; + this.yieldPos = oldYieldPos; + this.awaitPos = oldAwaitPos; + this.inFunction = oldInFunc; + return this.finishNode(node, "ArrowFunctionExpression") +}; + +// Parse function body and check parameters. + +pp$3.parseFunctionBody = function(node, isArrowFunction) { + var isExpression = isArrowFunction && this.type !== types.braceL; + var oldStrict = this.strict, useStrict = false; + + if (isExpression) { + node.body = this.parseMaybeAssign(); + node.expression = true; + this.checkParams(node, false); + } else { + var nonSimple = this.options.ecmaVersion >= 7 && !this.isSimpleParamList(node.params); + if (!oldStrict || nonSimple) { + useStrict = this.strictDirective(this.end); + // If this is a strict mode function, verify that argument names + // are not repeated, and it does not try to bind the words `eval` + // or `arguments`. + if (useStrict && nonSimple) + { this.raiseRecoverable(node.start, "Illegal 'use strict' directive in function with non-simple parameter list"); } + } + // Start a new scope with regard to labels and the `inFunction` + // flag (restore them to their old value afterwards). + var oldLabels = this.labels; + this.labels = []; + if (useStrict) { this.strict = true; } + + // Add the params to varDeclaredNames to ensure that an error is thrown + // if a let/const declaration in the function clashes with one of the params. + this.checkParams(node, !oldStrict && !useStrict && !isArrowFunction && this.isSimpleParamList(node.params)); + node.body = this.parseBlock(false); + node.expression = false; + this.adaptDirectivePrologue(node.body.body); + this.labels = oldLabels; + } + this.exitFunctionScope(); + + if (this.strict && node.id) { + // Ensure the function name isn't a forbidden identifier in strict mode, e.g. 'eval' + this.checkLVal(node.id, "none"); + } + this.strict = oldStrict; +}; + +pp$3.isSimpleParamList = function(params) { + for (var i = 0, list = params; i < list.length; i += 1) + { + var param = list[i]; + + if (param.type !== "Identifier") { return false + } } + return true +}; + +// Checks function params for various disallowed patterns such as using "eval" +// or "arguments" and duplicate parameters. + +pp$3.checkParams = function(node, allowDuplicates) { + var this$1 = this; + + var nameHash = {}; + for (var i = 0, list = node.params; i < list.length; i += 1) + { + var param = list[i]; + + this$1.checkLVal(param, "var", allowDuplicates ? null : nameHash); + } +}; + +// Parses a comma-separated list of expressions, and returns them as +// an array. `close` is the token type that ends the list, and +// `allowEmpty` can be turned on to allow subsequent commas with +// nothing in between them to be parsed as `null` (which is needed +// for array literals). + +pp$3.parseExprList = function(close, allowTrailingComma, allowEmpty, refDestructuringErrors) { + var this$1 = this; + + var elts = [], first = true; + while (!this.eat(close)) { + if (!first) { + this$1.expect(types.comma); + if (allowTrailingComma && this$1.afterTrailingComma(close)) { break } + } else { first = false; } + + var elt = (void 0); + if (allowEmpty && this$1.type === types.comma) + { elt = null; } + else if (this$1.type === types.ellipsis) { + elt = this$1.parseSpread(refDestructuringErrors); + if (refDestructuringErrors && this$1.type === types.comma && refDestructuringErrors.trailingComma < 0) + { refDestructuringErrors.trailingComma = this$1.start; } + } else { + elt = this$1.parseMaybeAssign(false, refDestructuringErrors); + } + elts.push(elt); + } + return elts +}; + +pp$3.checkUnreserved = function(ref) { + var start = ref.start; + var end = ref.end; + var name = ref.name; + + if (this.inGenerator && name === "yield") + { this.raiseRecoverable(start, "Can not use 'yield' as identifier inside a generator"); } + if (this.inAsync && name === "await") + { this.raiseRecoverable(start, "Can not use 'await' as identifier inside an async function"); } + if (this.isKeyword(name)) + { this.raise(start, ("Unexpected keyword '" + name + "'")); } + if (this.options.ecmaVersion < 6 && + this.input.slice(start, end).indexOf("\\") !== -1) { return } + var re = this.strict ? this.reservedWordsStrict : this.reservedWords; + if (re.test(name)) { + if (!this.inAsync && name === "await") + { this.raiseRecoverable(start, "Can not use keyword 'await' outside an async function"); } + this.raiseRecoverable(start, ("The keyword '" + name + "' is reserved")); + } +}; + +// Parse the next token as an identifier. If `liberal` is true (used +// when parsing properties), it will also convert keywords into +// identifiers. + +pp$3.parseIdent = function(liberal, isBinding) { + var node = this.startNode(); + if (liberal && this.options.allowReserved === "never") { liberal = false; } + if (this.type === types.name) { + node.name = this.value; + } else if (this.type.keyword) { + node.name = this.type.keyword; + + // To fix https://github.com/acornjs/acorn/issues/575 + // `class` and `function` keywords push new context into this.context. + // But there is no chance to pop the context if the keyword is consumed as an identifier such as a property name. + // If the previous token is a dot, this does not apply because the context-managing code already ignored the keyword + if ((node.name === "class" || node.name === "function") && + (this.lastTokEnd !== this.lastTokStart + 1 || this.input.charCodeAt(this.lastTokStart) !== 46)) { + this.context.pop(); + } + } else { + this.unexpected(); + } + this.next(); + this.finishNode(node, "Identifier"); + if (!liberal) { this.checkUnreserved(node); } + return node +}; + +// Parses yield expression inside generator. + +pp$3.parseYield = function() { + if (!this.yieldPos) { this.yieldPos = this.start; } + + var node = this.startNode(); + this.next(); + if (this.type === types.semi || this.canInsertSemicolon() || (this.type !== types.star && !this.type.startsExpr)) { + node.delegate = false; + node.argument = null; + } else { + node.delegate = this.eat(types.star); + node.argument = this.parseMaybeAssign(); + } + return this.finishNode(node, "YieldExpression") +}; + +pp$3.parseAwait = function() { + if (!this.awaitPos) { this.awaitPos = this.start; } + + var node = this.startNode(); + this.next(); + node.argument = this.parseMaybeUnary(null, true); + return this.finishNode(node, "AwaitExpression") +}; + +var pp$4 = Parser.prototype; + +// This function is used to raise exceptions on parse errors. It +// takes an offset integer (into the current `input`) to indicate +// the location of the error, attaches the position to the end +// of the error message, and then raises a `SyntaxError` with that +// message. + +pp$4.raise = function(pos, message) { + var loc = getLineInfo(this.input, pos); + message += " (" + loc.line + ":" + loc.column + ")"; + var err = new SyntaxError(message); + err.pos = pos; err.loc = loc; err.raisedAt = this.pos; + throw err +}; + +pp$4.raiseRecoverable = pp$4.raise; + +pp$4.curPosition = function() { + if (this.options.locations) { + return new Position(this.curLine, this.pos - this.lineStart) + } +}; + +var pp$5 = Parser.prototype; + +// Object.assign polyfill +var assign = Object.assign || function(target) { + var sources = [], len = arguments.length - 1; + while ( len-- > 0 ) sources[ len ] = arguments[ len + 1 ]; + + for (var i = 0, list = sources; i < list.length; i += 1) { + var source = list[i]; + + for (var key in source) { + if (has(source, key)) { + target[key] = source[key]; + } + } + } + return target +}; + +// The functions in this module keep track of declared variables in the current scope in order to detect duplicate variable names. + +pp$5.enterFunctionScope = function() { + // var: a hash of var-declared names in the current lexical scope + // lexical: a hash of lexically-declared names in the current lexical scope + // childVar: a hash of var-declared names in all child lexical scopes of the current lexical scope (within the current function scope) + // parentLexical: a hash of lexically-declared names in all parent lexical scopes of the current lexical scope (within the current function scope) + this.scopeStack.push({var: {}, lexical: {}, childVar: {}, parentLexical: {}}); +}; + +pp$5.exitFunctionScope = function() { + this.scopeStack.pop(); +}; + +pp$5.enterLexicalScope = function() { + var parentScope = this.scopeStack[this.scopeStack.length - 1]; + var childScope = {var: {}, lexical: {}, childVar: {}, parentLexical: {}}; + + this.scopeStack.push(childScope); + assign(childScope.parentLexical, parentScope.lexical, parentScope.parentLexical); +}; + +pp$5.exitLexicalScope = function() { + var childScope = this.scopeStack.pop(); + var parentScope = this.scopeStack[this.scopeStack.length - 1]; + + assign(parentScope.childVar, childScope.var, childScope.childVar); +}; + +/** + * A name can be declared with `var` if there are no variables with the same name declared with `let`/`const` + * in the current lexical scope or any of the parent lexical scopes in this function. + */ +pp$5.canDeclareVarName = function(name) { + var currentScope = this.scopeStack[this.scopeStack.length - 1]; + + return !has(currentScope.lexical, name) && !has(currentScope.parentLexical, name) +}; + +/** + * A name can be declared with `let`/`const` if there are no variables with the same name declared with `let`/`const` + * in the current scope, and there are no variables with the same name declared with `var` in the current scope or in + * any child lexical scopes in this function. + */ +pp$5.canDeclareLexicalName = function(name) { + var currentScope = this.scopeStack[this.scopeStack.length - 1]; + + return !has(currentScope.lexical, name) && !has(currentScope.var, name) && !has(currentScope.childVar, name) +}; + +pp$5.declareVarName = function(name) { + this.scopeStack[this.scopeStack.length - 1].var[name] = true; +}; + +pp$5.declareLexicalName = function(name) { + this.scopeStack[this.scopeStack.length - 1].lexical[name] = true; +}; + +var Node = function Node(parser, pos, loc) { + this.type = ""; + this.start = pos; + this.end = 0; + if (parser.options.locations) + { this.loc = new SourceLocation(parser, loc); } + if (parser.options.directSourceFile) + { this.sourceFile = parser.options.directSourceFile; } + if (parser.options.ranges) + { this.range = [pos, 0]; } +}; + +// Start an AST node, attaching a start offset. + +var pp$6 = Parser.prototype; + +pp$6.startNode = function() { + return new Node(this, this.start, this.startLoc) +}; + +pp$6.startNodeAt = function(pos, loc) { + return new Node(this, pos, loc) +}; + +// Finish an AST node, adding `type` and `end` properties. + +function finishNodeAt(node, type, pos, loc) { + node.type = type; + node.end = pos; + if (this.options.locations) + { node.loc.end = loc; } + if (this.options.ranges) + { node.range[1] = pos; } + return node +} + +pp$6.finishNode = function(node, type) { + return finishNodeAt.call(this, node, type, this.lastTokEnd, this.lastTokEndLoc) +}; + +// Finish node at given position + +pp$6.finishNodeAt = function(node, type, pos, loc) { + return finishNodeAt.call(this, node, type, pos, loc) +}; + +// The algorithm used to determine whether a regexp can appear at a +// given point in the program is loosely based on sweet.js' approach. +// See https://github.com/mozilla/sweet.js/wiki/design + +var TokContext = function TokContext(token, isExpr, preserveSpace, override, generator) { + this.token = token; + this.isExpr = !!isExpr; + this.preserveSpace = !!preserveSpace; + this.override = override; + this.generator = !!generator; +}; + +var types$1 = { + b_stat: new TokContext("{", false), + b_expr: new TokContext("{", true), + b_tmpl: new TokContext("${", false), + p_stat: new TokContext("(", false), + p_expr: new TokContext("(", true), + q_tmpl: new TokContext("`", true, true, function (p) { return p.tryReadTemplateToken(); }), + f_stat: new TokContext("function", false), + f_expr: new TokContext("function", true), + f_expr_gen: new TokContext("function", true, false, null, true), + f_gen: new TokContext("function", false, false, null, true) +}; + +var pp$7 = Parser.prototype; + +pp$7.initialContext = function() { + return [types$1.b_stat] +}; + +pp$7.braceIsBlock = function(prevType) { + var parent = this.curContext(); + if (parent === types$1.f_expr || parent === types$1.f_stat) + { return true } + if (prevType === types.colon && (parent === types$1.b_stat || parent === types$1.b_expr)) + { return !parent.isExpr } + + // The check for `tt.name && exprAllowed` detects whether we are + // after a `yield` or `of` construct. See the `updateContext` for + // `tt.name`. + if (prevType === types._return || prevType === types.name && this.exprAllowed) + { return lineBreak.test(this.input.slice(this.lastTokEnd, this.start)) } + if (prevType === types._else || prevType === types.semi || prevType === types.eof || prevType === types.parenR || prevType === types.arrow) + { return true } + if (prevType === types.braceL) + { return parent === types$1.b_stat } + if (prevType === types._var || prevType === types.name) + { return false } + return !this.exprAllowed +}; + +pp$7.inGeneratorContext = function() { + var this$1 = this; + + for (var i = this.context.length - 1; i >= 1; i--) { + var context = this$1.context[i]; + if (context.token === "function") + { return context.generator } + } + return false +}; + +pp$7.updateContext = function(prevType) { + var update, type = this.type; + if (type.keyword && prevType === types.dot) + { this.exprAllowed = false; } + else if (update = type.updateContext) + { update.call(this, prevType); } + else + { this.exprAllowed = type.beforeExpr; } +}; + +// Token-specific context update code + +types.parenR.updateContext = types.braceR.updateContext = function() { + if (this.context.length === 1) { + this.exprAllowed = true; + return + } + var out = this.context.pop(); + if (out === types$1.b_stat && this.curContext().token === "function") { + out = this.context.pop(); + } + this.exprAllowed = !out.isExpr; +}; + +types.braceL.updateContext = function(prevType) { + this.context.push(this.braceIsBlock(prevType) ? types$1.b_stat : types$1.b_expr); + this.exprAllowed = true; +}; + +types.dollarBraceL.updateContext = function() { + this.context.push(types$1.b_tmpl); + this.exprAllowed = true; +}; + +types.parenL.updateContext = function(prevType) { + var statementParens = prevType === types._if || prevType === types._for || prevType === types._with || prevType === types._while; + this.context.push(statementParens ? types$1.p_stat : types$1.p_expr); + this.exprAllowed = true; +}; + +types.incDec.updateContext = function() { + // tokExprAllowed stays unchanged +}; + +types._function.updateContext = types._class.updateContext = function(prevType) { + if (prevType.beforeExpr && prevType !== types.semi && prevType !== types._else && + !((prevType === types.colon || prevType === types.braceL) && this.curContext() === types$1.b_stat)) + { this.context.push(types$1.f_expr); } + else + { this.context.push(types$1.f_stat); } + this.exprAllowed = false; +}; + +types.backQuote.updateContext = function() { + if (this.curContext() === types$1.q_tmpl) + { this.context.pop(); } + else + { this.context.push(types$1.q_tmpl); } + this.exprAllowed = false; +}; + +types.star.updateContext = function(prevType) { + if (prevType === types._function) { + var index = this.context.length - 1; + if (this.context[index] === types$1.f_expr) + { this.context[index] = types$1.f_expr_gen; } + else + { this.context[index] = types$1.f_gen; } + } + this.exprAllowed = true; +}; + +types.name.updateContext = function(prevType) { + var allowed = false; + if (this.options.ecmaVersion >= 6 && prevType !== types.dot) { + if (this.value === "of" && !this.exprAllowed || + this.value === "yield" && this.inGeneratorContext()) + { allowed = true; } + } + this.exprAllowed = allowed; +}; + +var data = { + "$LONE": [ + "ASCII", + "ASCII_Hex_Digit", + "AHex", + "Alphabetic", + "Alpha", + "Any", + "Assigned", + "Bidi_Control", + "Bidi_C", + "Bidi_Mirrored", + "Bidi_M", + "Case_Ignorable", + "CI", + "Cased", + "Changes_When_Casefolded", + "CWCF", + "Changes_When_Casemapped", + "CWCM", + "Changes_When_Lowercased", + "CWL", + "Changes_When_NFKC_Casefolded", + "CWKCF", + "Changes_When_Titlecased", + "CWT", + "Changes_When_Uppercased", + "CWU", + "Dash", + "Default_Ignorable_Code_Point", + "DI", + "Deprecated", + "Dep", + "Diacritic", + "Dia", + "Emoji", + "Emoji_Component", + "Emoji_Modifier", + "Emoji_Modifier_Base", + "Emoji_Presentation", + "Extender", + "Ext", + "Grapheme_Base", + "Gr_Base", + "Grapheme_Extend", + "Gr_Ext", + "Hex_Digit", + "Hex", + "IDS_Binary_Operator", + "IDSB", + "IDS_Trinary_Operator", + "IDST", + "ID_Continue", + "IDC", + "ID_Start", + "IDS", + "Ideographic", + "Ideo", + "Join_Control", + "Join_C", + "Logical_Order_Exception", + "LOE", + "Lowercase", + "Lower", + "Math", + "Noncharacter_Code_Point", + "NChar", + "Pattern_Syntax", + "Pat_Syn", + "Pattern_White_Space", + "Pat_WS", + "Quotation_Mark", + "QMark", + "Radical", + "Regional_Indicator", + "RI", + "Sentence_Terminal", + "STerm", + "Soft_Dotted", + "SD", + "Terminal_Punctuation", + "Term", + "Unified_Ideograph", + "UIdeo", + "Uppercase", + "Upper", + "Variation_Selector", + "VS", + "White_Space", + "space", + "XID_Continue", + "XIDC", + "XID_Start", + "XIDS" + ], + "General_Category": [ + "Cased_Letter", + "LC", + "Close_Punctuation", + "Pe", + "Connector_Punctuation", + "Pc", + "Control", + "Cc", + "cntrl", + "Currency_Symbol", + "Sc", + "Dash_Punctuation", + "Pd", + "Decimal_Number", + "Nd", + "digit", + "Enclosing_Mark", + "Me", + "Final_Punctuation", + "Pf", + "Format", + "Cf", + "Initial_Punctuation", + "Pi", + "Letter", + "L", + "Letter_Number", + "Nl", + "Line_Separator", + "Zl", + "Lowercase_Letter", + "Ll", + "Mark", + "M", + "Combining_Mark", + "Math_Symbol", + "Sm", + "Modifier_Letter", + "Lm", + "Modifier_Symbol", + "Sk", + "Nonspacing_Mark", + "Mn", + "Number", + "N", + "Open_Punctuation", + "Ps", + "Other", + "C", + "Other_Letter", + "Lo", + "Other_Number", + "No", + "Other_Punctuation", + "Po", + "Other_Symbol", + "So", + "Paragraph_Separator", + "Zp", + "Private_Use", + "Co", + "Punctuation", + "P", + "punct", + "Separator", + "Z", + "Space_Separator", + "Zs", + "Spacing_Mark", + "Mc", + "Surrogate", + "Cs", + "Symbol", + "S", + "Titlecase_Letter", + "Lt", + "Unassigned", + "Cn", + "Uppercase_Letter", + "Lu" + ], + "Script": [ + "Adlam", + "Adlm", + "Ahom", + "Anatolian_Hieroglyphs", + "Hluw", + "Arabic", + "Arab", + "Armenian", + "Armn", + "Avestan", + "Avst", + "Balinese", + "Bali", + "Bamum", + "Bamu", + "Bassa_Vah", + "Bass", + "Batak", + "Batk", + "Bengali", + "Beng", + "Bhaiksuki", + "Bhks", + "Bopomofo", + "Bopo", + "Brahmi", + "Brah", + "Braille", + "Brai", + "Buginese", + "Bugi", + "Buhid", + "Buhd", + "Canadian_Aboriginal", + "Cans", + "Carian", + "Cari", + "Caucasian_Albanian", + "Aghb", + "Chakma", + "Cakm", + "Cham", + "Cherokee", + "Cher", + "Common", + "Zyyy", + "Coptic", + "Copt", + "Qaac", + "Cuneiform", + "Xsux", + "Cypriot", + "Cprt", + "Cyrillic", + "Cyrl", + "Deseret", + "Dsrt", + "Devanagari", + "Deva", + "Duployan", + "Dupl", + "Egyptian_Hieroglyphs", + "Egyp", + "Elbasan", + "Elba", + "Ethiopic", + "Ethi", + "Georgian", + "Geor", + "Glagolitic", + "Glag", + "Gothic", + "Goth", + "Grantha", + "Gran", + "Greek", + "Grek", + "Gujarati", + "Gujr", + "Gurmukhi", + "Guru", + "Han", + "Hani", + "Hangul", + "Hang", + "Hanunoo", + "Hano", + "Hatran", + "Hatr", + "Hebrew", + "Hebr", + "Hiragana", + "Hira", + "Imperial_Aramaic", + "Armi", + "Inherited", + "Zinh", + "Qaai", + "Inscriptional_Pahlavi", + "Phli", + "Inscriptional_Parthian", + "Prti", + "Javanese", + "Java", + "Kaithi", + "Kthi", + "Kannada", + "Knda", + "Katakana", + "Kana", + "Kayah_Li", + "Kali", + "Kharoshthi", + "Khar", + "Khmer", + "Khmr", + "Khojki", + "Khoj", + "Khudawadi", + "Sind", + "Lao", + "Laoo", + "Latin", + "Latn", + "Lepcha", + "Lepc", + "Limbu", + "Limb", + "Linear_A", + "Lina", + "Linear_B", + "Linb", + "Lisu", + "Lycian", + "Lyci", + "Lydian", + "Lydi", + "Mahajani", + "Mahj", + "Malayalam", + "Mlym", + "Mandaic", + "Mand", + "Manichaean", + "Mani", + "Marchen", + "Marc", + "Masaram_Gondi", + "Gonm", + "Meetei_Mayek", + "Mtei", + "Mende_Kikakui", + "Mend", + "Meroitic_Cursive", + "Merc", + "Meroitic_Hieroglyphs", + "Mero", + "Miao", + "Plrd", + "Modi", + "Mongolian", + "Mong", + "Mro", + "Mroo", + "Multani", + "Mult", + "Myanmar", + "Mymr", + "Nabataean", + "Nbat", + "New_Tai_Lue", + "Talu", + "Newa", + "Nko", + "Nkoo", + "Nushu", + "Nshu", + "Ogham", + "Ogam", + "Ol_Chiki", + "Olck", + "Old_Hungarian", + "Hung", + "Old_Italic", + "Ital", + "Old_North_Arabian", + "Narb", + "Old_Permic", + "Perm", + "Old_Persian", + "Xpeo", + "Old_South_Arabian", + "Sarb", + "Old_Turkic", + "Orkh", + "Oriya", + "Orya", + "Osage", + "Osge", + "Osmanya", + "Osma", + "Pahawh_Hmong", + "Hmng", + "Palmyrene", + "Palm", + "Pau_Cin_Hau", + "Pauc", + "Phags_Pa", + "Phag", + "Phoenician", + "Phnx", + "Psalter_Pahlavi", + "Phlp", + "Rejang", + "Rjng", + "Runic", + "Runr", + "Samaritan", + "Samr", + "Saurashtra", + "Saur", + "Sharada", + "Shrd", + "Shavian", + "Shaw", + "Siddham", + "Sidd", + "SignWriting", + "Sgnw", + "Sinhala", + "Sinh", + "Sora_Sompeng", + "Sora", + "Soyombo", + "Soyo", + "Sundanese", + "Sund", + "Syloti_Nagri", + "Sylo", + "Syriac", + "Syrc", + "Tagalog", + "Tglg", + "Tagbanwa", + "Tagb", + "Tai_Le", + "Tale", + "Tai_Tham", + "Lana", + "Tai_Viet", + "Tavt", + "Takri", + "Takr", + "Tamil", + "Taml", + "Tangut", + "Tang", + "Telugu", + "Telu", + "Thaana", + "Thaa", + "Thai", + "Tibetan", + "Tibt", + "Tifinagh", + "Tfng", + "Tirhuta", + "Tirh", + "Ugaritic", + "Ugar", + "Vai", + "Vaii", + "Warang_Citi", + "Wara", + "Yi", + "Yiii", + "Zanabazar_Square", + "Zanb" + ] +}; +Array.prototype.push.apply(data.$LONE, data.General_Category); +data.gc = data.General_Category; +data.sc = data.Script_Extensions = data.scx = data.Script; + +var pp$9 = Parser.prototype; + +var RegExpValidationState = function RegExpValidationState(parser) { + this.parser = parser; + this.validFlags = "gim" + (parser.options.ecmaVersion >= 6 ? "uy" : "") + (parser.options.ecmaVersion >= 9 ? "s" : ""); + this.source = ""; + this.flags = ""; + this.start = 0; + this.switchU = false; + this.switchN = false; + this.pos = 0; + this.lastIntValue = 0; + this.lastStringValue = ""; + this.lastAssertionIsQuantifiable = false; + this.numCapturingParens = 0; + this.maxBackReference = 0; + this.groupNames = []; + this.backReferenceNames = []; +}; + +RegExpValidationState.prototype.reset = function reset (start, pattern, flags) { + var unicode = flags.indexOf("u") !== -1; + this.start = start | 0; + this.source = pattern + ""; + this.flags = flags; + this.switchU = unicode && this.parser.options.ecmaVersion >= 6; + this.switchN = unicode && this.parser.options.ecmaVersion >= 9; +}; + +RegExpValidationState.prototype.raise = function raise (message) { + this.parser.raiseRecoverable(this.start, ("Invalid regular expression: /" + (this.source) + "/: " + message)); +}; + +// If u flag is given, this returns the code point at the index (it combines a surrogate pair). +// Otherwise, this returns the code unit of the index (can be a part of a surrogate pair). +RegExpValidationState.prototype.at = function at (i) { + var s = this.source; + var l = s.length; + if (i >= l) { + return -1 + } + var c = s.charCodeAt(i); + if (!this.switchU || c <= 0xD7FF || c >= 0xE000 || i + 1 >= l) { + return c + } + return (c << 10) + s.charCodeAt(i + 1) - 0x35FDC00 +}; + +RegExpValidationState.prototype.nextIndex = function nextIndex (i) { + var s = this.source; + var l = s.length; + if (i >= l) { + return l + } + var c = s.charCodeAt(i); + if (!this.switchU || c <= 0xD7FF || c >= 0xE000 || i + 1 >= l) { + return i + 1 + } + return i + 2 +}; + +RegExpValidationState.prototype.current = function current () { + return this.at(this.pos) +}; + +RegExpValidationState.prototype.lookahead = function lookahead () { + return this.at(this.nextIndex(this.pos)) +}; + +RegExpValidationState.prototype.advance = function advance () { + this.pos = this.nextIndex(this.pos); +}; + +RegExpValidationState.prototype.eat = function eat (ch) { + if (this.current() === ch) { + this.advance(); + return true + } + return false +}; + +function codePointToString$1(ch) { + if (ch <= 0xFFFF) { return String.fromCharCode(ch) } + ch -= 0x10000; + return String.fromCharCode((ch >> 10) + 0xD800, (ch & 0x03FF) + 0xDC00) +} + +/** + * Validate the flags part of a given RegExpLiteral. + * + * @param {RegExpValidationState} state The state to validate RegExp. + * @returns {void} + */ +pp$9.validateRegExpFlags = function(state) { + var this$1 = this; + + var validFlags = state.validFlags; + var flags = state.flags; + + for (var i = 0; i < flags.length; i++) { + var flag = flags.charAt(i); + if (validFlags.indexOf(flag) === -1) { + this$1.raise(state.start, "Invalid regular expression flag"); + } + if (flags.indexOf(flag, i + 1) > -1) { + this$1.raise(state.start, "Duplicate regular expression flag"); + } + } +}; + +/** + * Validate the pattern part of a given RegExpLiteral. + * + * @param {RegExpValidationState} state The state to validate RegExp. + * @returns {void} + */ +pp$9.validateRegExpPattern = function(state) { + this.regexp_pattern(state); + + // The goal symbol for the parse is |Pattern[~U, ~N]|. If the result of + // parsing contains a |GroupName|, reparse with the goal symbol + // |Pattern[~U, +N]| and use this result instead. Throw a *SyntaxError* + // exception if _P_ did not conform to the grammar, if any elements of _P_ + // were not matched by the parse, or if any Early Error conditions exist. + if (!state.switchN && this.options.ecmaVersion >= 9 && state.groupNames.length > 0) { + state.switchN = true; + this.regexp_pattern(state); + } +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-Pattern +pp$9.regexp_pattern = function(state) { + state.pos = 0; + state.lastIntValue = 0; + state.lastStringValue = ""; + state.lastAssertionIsQuantifiable = false; + state.numCapturingParens = 0; + state.maxBackReference = 0; + state.groupNames.length = 0; + state.backReferenceNames.length = 0; + + this.regexp_disjunction(state); + + if (state.pos !== state.source.length) { + // Make the same messages as V8. + if (state.eat(0x29 /* ) */)) { + state.raise("Unmatched ')'"); + } + if (state.eat(0x5D /* [ */) || state.eat(0x7D /* } */)) { + state.raise("Lone quantifier brackets"); + } + } + if (state.maxBackReference > state.numCapturingParens) { + state.raise("Invalid escape"); + } + for (var i = 0, list = state.backReferenceNames; i < list.length; i += 1) { + var name = list[i]; + + if (state.groupNames.indexOf(name) === -1) { + state.raise("Invalid named capture referenced"); + } + } +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-Disjunction +pp$9.regexp_disjunction = function(state) { + var this$1 = this; + + this.regexp_alternative(state); + while (state.eat(0x7C /* | */)) { + this$1.regexp_alternative(state); + } + + // Make the same message as V8. + if (this.regexp_eatQuantifier(state, true)) { + state.raise("Nothing to repeat"); + } + if (state.eat(0x7B /* { */)) { + state.raise("Lone quantifier brackets"); + } +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-Alternative +pp$9.regexp_alternative = function(state) { + while (state.pos < state.source.length && this.regexp_eatTerm(state)) + { } +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-Term +pp$9.regexp_eatTerm = function(state) { + if (this.regexp_eatAssertion(state)) { + // Handle `QuantifiableAssertion Quantifier` alternative. + // `state.lastAssertionIsQuantifiable` is true if the last eaten Assertion + // is a QuantifiableAssertion. + if (state.lastAssertionIsQuantifiable && this.regexp_eatQuantifier(state)) { + // Make the same message as V8. + if (state.switchU) { + state.raise("Invalid quantifier"); + } + } + return true + } + + if (state.switchU ? this.regexp_eatAtom(state) : this.regexp_eatExtendedAtom(state)) { + this.regexp_eatQuantifier(state); + return true + } + + return false +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-Assertion +pp$9.regexp_eatAssertion = function(state) { + var start = state.pos; + state.lastAssertionIsQuantifiable = false; + + // ^, $ + if (state.eat(0x5E /* ^ */) || state.eat(0x24 /* $ */)) { + return true + } + + // \b \B + if (state.eat(0x5C /* \ */)) { + if (state.eat(0x42 /* B */) || state.eat(0x62 /* b */)) { + return true + } + state.pos = start; + } + + // Lookahead / Lookbehind + if (state.eat(0x28 /* ( */) && state.eat(0x3F /* ? */)) { + var lookbehind = false; + if (this.options.ecmaVersion >= 9) { + lookbehind = state.eat(0x3C /* < */); + } + if (state.eat(0x3D /* = */) || state.eat(0x21 /* ! */)) { + this.regexp_disjunction(state); + if (!state.eat(0x29 /* ) */)) { + state.raise("Unterminated group"); + } + state.lastAssertionIsQuantifiable = !lookbehind; + return true + } + } + + state.pos = start; + return false +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-Quantifier +pp$9.regexp_eatQuantifier = function(state, noError) { + if ( noError === void 0 ) noError = false; + + if (this.regexp_eatQuantifierPrefix(state, noError)) { + state.eat(0x3F /* ? */); + return true + } + return false +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-QuantifierPrefix +pp$9.regexp_eatQuantifierPrefix = function(state, noError) { + return ( + state.eat(0x2A /* * */) || + state.eat(0x2B /* + */) || + state.eat(0x3F /* ? */) || + this.regexp_eatBracedQuantifier(state, noError) + ) +}; +pp$9.regexp_eatBracedQuantifier = function(state, noError) { + var start = state.pos; + if (state.eat(0x7B /* { */)) { + var min = 0, max = -1; + if (this.regexp_eatDecimalDigits(state)) { + min = state.lastIntValue; + if (state.eat(0x2C /* , */) && this.regexp_eatDecimalDigits(state)) { + max = state.lastIntValue; + } + if (state.eat(0x7D /* } */)) { + // SyntaxError in https://www.ecma-international.org/ecma-262/8.0/#sec-term + if (max !== -1 && max < min && !noError) { + state.raise("numbers out of order in {} quantifier"); + } + return true + } + } + if (state.switchU && !noError) { + state.raise("Incomplete quantifier"); + } + state.pos = start; + } + return false +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-Atom +pp$9.regexp_eatAtom = function(state) { + return ( + this.regexp_eatPatternCharacters(state) || + state.eat(0x2E /* . */) || + this.regexp_eatReverseSolidusAtomEscape(state) || + this.regexp_eatCharacterClass(state) || + this.regexp_eatUncapturingGroup(state) || + this.regexp_eatCapturingGroup(state) + ) +}; +pp$9.regexp_eatReverseSolidusAtomEscape = function(state) { + var start = state.pos; + if (state.eat(0x5C /* \ */)) { + if (this.regexp_eatAtomEscape(state)) { + return true + } + state.pos = start; + } + return false +}; +pp$9.regexp_eatUncapturingGroup = function(state) { + var start = state.pos; + if (state.eat(0x28 /* ( */)) { + if (state.eat(0x3F /* ? */) && state.eat(0x3A /* : */)) { + this.regexp_disjunction(state); + if (state.eat(0x29 /* ) */)) { + return true + } + state.raise("Unterminated group"); + } + state.pos = start; + } + return false +}; +pp$9.regexp_eatCapturingGroup = function(state) { + if (state.eat(0x28 /* ( */)) { + if (this.options.ecmaVersion >= 9) { + this.regexp_groupSpecifier(state); + } else if (state.current() === 0x3F /* ? */) { + state.raise("Invalid group"); + } + this.regexp_disjunction(state); + if (state.eat(0x29 /* ) */)) { + state.numCapturingParens += 1; + return true + } + state.raise("Unterminated group"); + } + return false +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-ExtendedAtom +pp$9.regexp_eatExtendedAtom = function(state) { + return ( + state.eat(0x2E /* . */) || + this.regexp_eatReverseSolidusAtomEscape(state) || + this.regexp_eatCharacterClass(state) || + this.regexp_eatUncapturingGroup(state) || + this.regexp_eatCapturingGroup(state) || + this.regexp_eatInvalidBracedQuantifier(state) || + this.regexp_eatExtendedPatternCharacter(state) + ) +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-InvalidBracedQuantifier +pp$9.regexp_eatInvalidBracedQuantifier = function(state) { + if (this.regexp_eatBracedQuantifier(state, true)) { + state.raise("Nothing to repeat"); + } + return false +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-SyntaxCharacter +pp$9.regexp_eatSyntaxCharacter = function(state) { + var ch = state.current(); + if (isSyntaxCharacter(ch)) { + state.lastIntValue = ch; + state.advance(); + return true + } + return false +}; +function isSyntaxCharacter(ch) { + return ( + ch === 0x24 /* $ */ || + ch >= 0x28 /* ( */ && ch <= 0x2B /* + */ || + ch === 0x2E /* . */ || + ch === 0x3F /* ? */ || + ch >= 0x5B /* [ */ && ch <= 0x5E /* ^ */ || + ch >= 0x7B /* { */ && ch <= 0x7D /* } */ + ) +} + +// https://www.ecma-international.org/ecma-262/8.0/#prod-PatternCharacter +// But eat eager. +pp$9.regexp_eatPatternCharacters = function(state) { + var start = state.pos; + var ch = 0; + while ((ch = state.current()) !== -1 && !isSyntaxCharacter(ch)) { + state.advance(); + } + return state.pos !== start +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-ExtendedPatternCharacter +pp$9.regexp_eatExtendedPatternCharacter = function(state) { + var ch = state.current(); + if ( + ch !== -1 && + ch !== 0x24 /* $ */ && + !(ch >= 0x28 /* ( */ && ch <= 0x2B /* + */) && + ch !== 0x2E /* . */ && + ch !== 0x3F /* ? */ && + ch !== 0x5B /* [ */ && + ch !== 0x5E /* ^ */ && + ch !== 0x7C /* | */ + ) { + state.advance(); + return true + } + return false +}; + +// GroupSpecifier[U] :: +// [empty] +// `?` GroupName[?U] +pp$9.regexp_groupSpecifier = function(state) { + if (state.eat(0x3F /* ? */)) { + if (this.regexp_eatGroupName(state)) { + if (state.groupNames.indexOf(state.lastStringValue) !== -1) { + state.raise("Duplicate capture group name"); + } + state.groupNames.push(state.lastStringValue); + return + } + state.raise("Invalid group"); + } +}; + +// GroupName[U] :: +// `<` RegExpIdentifierName[?U] `>` +// Note: this updates `state.lastStringValue` property with the eaten name. +pp$9.regexp_eatGroupName = function(state) { + state.lastStringValue = ""; + if (state.eat(0x3C /* < */)) { + if (this.regexp_eatRegExpIdentifierName(state) && state.eat(0x3E /* > */)) { + return true + } + state.raise("Invalid capture group name"); + } + return false +}; + +// RegExpIdentifierName[U] :: +// RegExpIdentifierStart[?U] +// RegExpIdentifierName[?U] RegExpIdentifierPart[?U] +// Note: this updates `state.lastStringValue` property with the eaten name. +pp$9.regexp_eatRegExpIdentifierName = function(state) { + state.lastStringValue = ""; + if (this.regexp_eatRegExpIdentifierStart(state)) { + state.lastStringValue += codePointToString$1(state.lastIntValue); + while (this.regexp_eatRegExpIdentifierPart(state)) { + state.lastStringValue += codePointToString$1(state.lastIntValue); + } + return true + } + return false +}; + +// RegExpIdentifierStart[U] :: +// UnicodeIDStart +// `$` +// `_` +// `\` RegExpUnicodeEscapeSequence[?U] +pp$9.regexp_eatRegExpIdentifierStart = function(state) { + var start = state.pos; + var ch = state.current(); + state.advance(); + + if (ch === 0x5C /* \ */ && this.regexp_eatRegExpUnicodeEscapeSequence(state)) { + ch = state.lastIntValue; + } + if (isRegExpIdentifierStart(ch)) { + state.lastIntValue = ch; + return true + } + + state.pos = start; + return false +}; +function isRegExpIdentifierStart(ch) { + return isIdentifierStart(ch, true) || ch === 0x24 /* $ */ || ch === 0x5F /* _ */ +} + +// RegExpIdentifierPart[U] :: +// UnicodeIDContinue +// `$` +// `_` +// `\` RegExpUnicodeEscapeSequence[?U] +// <ZWNJ> +// <ZWJ> +pp$9.regexp_eatRegExpIdentifierPart = function(state) { + var start = state.pos; + var ch = state.current(); + state.advance(); + + if (ch === 0x5C /* \ */ && this.regexp_eatRegExpUnicodeEscapeSequence(state)) { + ch = state.lastIntValue; + } + if (isRegExpIdentifierPart(ch)) { + state.lastIntValue = ch; + return true + } + + state.pos = start; + return false +}; +function isRegExpIdentifierPart(ch) { + return isIdentifierChar(ch, true) || ch === 0x24 /* $ */ || ch === 0x5F /* _ */ || ch === 0x200C /* <ZWNJ> */ || ch === 0x200D /* <ZWJ> */ +} + +// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-AtomEscape +pp$9.regexp_eatAtomEscape = function(state) { + if ( + this.regexp_eatBackReference(state) || + this.regexp_eatCharacterClassEscape(state) || + this.regexp_eatCharacterEscape(state) || + (state.switchN && this.regexp_eatKGroupName(state)) + ) { + return true + } + if (state.switchU) { + // Make the same message as V8. + if (state.current() === 0x63 /* c */) { + state.raise("Invalid unicode escape"); + } + state.raise("Invalid escape"); + } + return false +}; +pp$9.regexp_eatBackReference = function(state) { + var start = state.pos; + if (this.regexp_eatDecimalEscape(state)) { + var n = state.lastIntValue; + if (state.switchU) { + // For SyntaxError in https://www.ecma-international.org/ecma-262/8.0/#sec-atomescape + if (n > state.maxBackReference) { + state.maxBackReference = n; + } + return true + } + if (n <= state.numCapturingParens) { + return true + } + state.pos = start; + } + return false +}; +pp$9.regexp_eatKGroupName = function(state) { + if (state.eat(0x6B /* k */)) { + if (this.regexp_eatGroupName(state)) { + state.backReferenceNames.push(state.lastStringValue); + return true + } + state.raise("Invalid named reference"); + } + return false +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-CharacterEscape +pp$9.regexp_eatCharacterEscape = function(state) { + return ( + this.regexp_eatControlEscape(state) || + this.regexp_eatCControlLetter(state) || + this.regexp_eatZero(state) || + this.regexp_eatHexEscapeSequence(state) || + this.regexp_eatRegExpUnicodeEscapeSequence(state) || + (!state.switchU && this.regexp_eatLegacyOctalEscapeSequence(state)) || + this.regexp_eatIdentityEscape(state) + ) +}; +pp$9.regexp_eatCControlLetter = function(state) { + var start = state.pos; + if (state.eat(0x63 /* c */)) { + if (this.regexp_eatControlLetter(state)) { + return true + } + state.pos = start; + } + return false +}; +pp$9.regexp_eatZero = function(state) { + if (state.current() === 0x30 /* 0 */ && !isDecimalDigit(state.lookahead())) { + state.lastIntValue = 0; + state.advance(); + return true + } + return false +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-ControlEscape +pp$9.regexp_eatControlEscape = function(state) { + var ch = state.current(); + if (ch === 0x74 /* t */) { + state.lastIntValue = 0x09; /* \t */ + state.advance(); + return true + } + if (ch === 0x6E /* n */) { + state.lastIntValue = 0x0A; /* \n */ + state.advance(); + return true + } + if (ch === 0x76 /* v */) { + state.lastIntValue = 0x0B; /* \v */ + state.advance(); + return true + } + if (ch === 0x66 /* f */) { + state.lastIntValue = 0x0C; /* \f */ + state.advance(); + return true + } + if (ch === 0x72 /* r */) { + state.lastIntValue = 0x0D; /* \r */ + state.advance(); + return true + } + return false +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-ControlLetter +pp$9.regexp_eatControlLetter = function(state) { + var ch = state.current(); + if (isControlLetter(ch)) { + state.lastIntValue = ch % 0x20; + state.advance(); + return true + } + return false +}; +function isControlLetter(ch) { + return ( + (ch >= 0x41 /* A */ && ch <= 0x5A /* Z */) || + (ch >= 0x61 /* a */ && ch <= 0x7A /* z */) + ) +} + +// https://www.ecma-international.org/ecma-262/8.0/#prod-RegExpUnicodeEscapeSequence +pp$9.regexp_eatRegExpUnicodeEscapeSequence = function(state) { + var start = state.pos; + + if (state.eat(0x75 /* u */)) { + if (this.regexp_eatFixedHexDigits(state, 4)) { + var lead = state.lastIntValue; + if (state.switchU && lead >= 0xD800 && lead <= 0xDBFF) { + var leadSurrogateEnd = state.pos; + if (state.eat(0x5C /* \ */) && state.eat(0x75 /* u */) && this.regexp_eatFixedHexDigits(state, 4)) { + var trail = state.lastIntValue; + if (trail >= 0xDC00 && trail <= 0xDFFF) { + state.lastIntValue = (lead - 0xD800) * 0x400 + (trail - 0xDC00) + 0x10000; + return true + } + } + state.pos = leadSurrogateEnd; + state.lastIntValue = lead; + } + return true + } + if ( + state.switchU && + state.eat(0x7B /* { */) && + this.regexp_eatHexDigits(state) && + state.eat(0x7D /* } */) && + isValidUnicode(state.lastIntValue) + ) { + return true + } + if (state.switchU) { + state.raise("Invalid unicode escape"); + } + state.pos = start; + } + + return false +}; +function isValidUnicode(ch) { + return ch >= 0 && ch <= 0x10FFFF +} + +// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-IdentityEscape +pp$9.regexp_eatIdentityEscape = function(state) { + if (state.switchU) { + if (this.regexp_eatSyntaxCharacter(state)) { + return true + } + if (state.eat(0x2F /* / */)) { + state.lastIntValue = 0x2F; /* / */ + return true + } + return false + } + + var ch = state.current(); + if (ch !== 0x63 /* c */ && (!state.switchN || ch !== 0x6B /* k */)) { + state.lastIntValue = ch; + state.advance(); + return true + } + + return false +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-DecimalEscape +pp$9.regexp_eatDecimalEscape = function(state) { + state.lastIntValue = 0; + var ch = state.current(); + if (ch >= 0x31 /* 1 */ && ch <= 0x39 /* 9 */) { + do { + state.lastIntValue = 10 * state.lastIntValue + (ch - 0x30 /* 0 */); + state.advance(); + } while ((ch = state.current()) >= 0x30 /* 0 */ && ch <= 0x39 /* 9 */) + return true + } + return false +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-CharacterClassEscape +pp$9.regexp_eatCharacterClassEscape = function(state) { + var ch = state.current(); + + if (isCharacterClassEscape(ch)) { + state.lastIntValue = -1; + state.advance(); + return true + } + + if ( + state.switchU && + this.options.ecmaVersion >= 9 && + (ch === 0x50 /* P */ || ch === 0x70 /* p */) + ) { + state.lastIntValue = -1; + state.advance(); + if ( + state.eat(0x7B /* { */) && + this.regexp_eatUnicodePropertyValueExpression(state) && + state.eat(0x7D /* } */) + ) { + return true + } + state.raise("Invalid property name"); + } + + return false +}; +function isCharacterClassEscape(ch) { + return ( + ch === 0x64 /* d */ || + ch === 0x44 /* D */ || + ch === 0x73 /* s */ || + ch === 0x53 /* S */ || + ch === 0x77 /* w */ || + ch === 0x57 /* W */ + ) +} + +// UnicodePropertyValueExpression :: +// UnicodePropertyName `=` UnicodePropertyValue +// LoneUnicodePropertyNameOrValue +pp$9.regexp_eatUnicodePropertyValueExpression = function(state) { + var start = state.pos; + + // UnicodePropertyName `=` UnicodePropertyValue + if (this.regexp_eatUnicodePropertyName(state) && state.eat(0x3D /* = */)) { + var name = state.lastStringValue; + if (this.regexp_eatUnicodePropertyValue(state)) { + var value = state.lastStringValue; + this.regexp_validateUnicodePropertyNameAndValue(state, name, value); + return true + } + } + state.pos = start; + + // LoneUnicodePropertyNameOrValue + if (this.regexp_eatLoneUnicodePropertyNameOrValue(state)) { + var nameOrValue = state.lastStringValue; + this.regexp_validateUnicodePropertyNameOrValue(state, nameOrValue); + return true + } + return false +}; +pp$9.regexp_validateUnicodePropertyNameAndValue = function(state, name, value) { + if (!data.hasOwnProperty(name) || data[name].indexOf(value) === -1) { + state.raise("Invalid property name"); + } +}; +pp$9.regexp_validateUnicodePropertyNameOrValue = function(state, nameOrValue) { + if (data.$LONE.indexOf(nameOrValue) === -1) { + state.raise("Invalid property name"); + } +}; + +// UnicodePropertyName :: +// UnicodePropertyNameCharacters +pp$9.regexp_eatUnicodePropertyName = function(state) { + var ch = 0; + state.lastStringValue = ""; + while (isUnicodePropertyNameCharacter(ch = state.current())) { + state.lastStringValue += codePointToString$1(ch); + state.advance(); + } + return state.lastStringValue !== "" +}; +function isUnicodePropertyNameCharacter(ch) { + return isControlLetter(ch) || ch === 0x5F /* _ */ +} + +// UnicodePropertyValue :: +// UnicodePropertyValueCharacters +pp$9.regexp_eatUnicodePropertyValue = function(state) { + var ch = 0; + state.lastStringValue = ""; + while (isUnicodePropertyValueCharacter(ch = state.current())) { + state.lastStringValue += codePointToString$1(ch); + state.advance(); + } + return state.lastStringValue !== "" +}; +function isUnicodePropertyValueCharacter(ch) { + return isUnicodePropertyNameCharacter(ch) || isDecimalDigit(ch) +} + +// LoneUnicodePropertyNameOrValue :: +// UnicodePropertyValueCharacters +pp$9.regexp_eatLoneUnicodePropertyNameOrValue = function(state) { + return this.regexp_eatUnicodePropertyValue(state) +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-CharacterClass +pp$9.regexp_eatCharacterClass = function(state) { + if (state.eat(0x5B /* [ */)) { + state.eat(0x5E /* ^ */); + this.regexp_classRanges(state); + if (state.eat(0x5D /* [ */)) { + return true + } + // Unreachable since it threw "unterminated regular expression" error before. + state.raise("Unterminated character class"); + } + return false +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-ClassRanges +// https://www.ecma-international.org/ecma-262/8.0/#prod-NonemptyClassRanges +// https://www.ecma-international.org/ecma-262/8.0/#prod-NonemptyClassRangesNoDash +pp$9.regexp_classRanges = function(state) { + var this$1 = this; + + while (this.regexp_eatClassAtom(state)) { + var left = state.lastIntValue; + if (state.eat(0x2D /* - */) && this$1.regexp_eatClassAtom(state)) { + var right = state.lastIntValue; + if (state.switchU && (left === -1 || right === -1)) { + state.raise("Invalid character class"); + } + if (left !== -1 && right !== -1 && left > right) { + state.raise("Range out of order in character class"); + } + } + } +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-ClassAtom +// https://www.ecma-international.org/ecma-262/8.0/#prod-ClassAtomNoDash +pp$9.regexp_eatClassAtom = function(state) { + var start = state.pos; + + if (state.eat(0x5C /* \ */)) { + if (this.regexp_eatClassEscape(state)) { + return true + } + if (state.switchU) { + // Make the same message as V8. + var ch$1 = state.current(); + if (ch$1 === 0x63 /* c */ || isOctalDigit(ch$1)) { + state.raise("Invalid class escape"); + } + state.raise("Invalid escape"); + } + state.pos = start; + } + + var ch = state.current(); + if (ch !== 0x5D /* [ */) { + state.lastIntValue = ch; + state.advance(); + return true + } + + return false +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-ClassEscape +pp$9.regexp_eatClassEscape = function(state) { + var start = state.pos; + + if (state.eat(0x62 /* b */)) { + state.lastIntValue = 0x08; /* <BS> */ + return true + } + + if (state.switchU && state.eat(0x2D /* - */)) { + state.lastIntValue = 0x2D; /* - */ + return true + } + + if (!state.switchU && state.eat(0x63 /* c */)) { + if (this.regexp_eatClassControlLetter(state)) { + return true + } + state.pos = start; + } + + return ( + this.regexp_eatCharacterClassEscape(state) || + this.regexp_eatCharacterEscape(state) + ) +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-ClassControlLetter +pp$9.regexp_eatClassControlLetter = function(state) { + var ch = state.current(); + if (isDecimalDigit(ch) || ch === 0x5F /* _ */) { + state.lastIntValue = ch % 0x20; + state.advance(); + return true + } + return false +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-HexEscapeSequence +pp$9.regexp_eatHexEscapeSequence = function(state) { + var start = state.pos; + if (state.eat(0x78 /* x */)) { + if (this.regexp_eatFixedHexDigits(state, 2)) { + return true + } + if (state.switchU) { + state.raise("Invalid escape"); + } + state.pos = start; + } + return false +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-DecimalDigits +pp$9.regexp_eatDecimalDigits = function(state) { + var start = state.pos; + var ch = 0; + state.lastIntValue = 0; + while (isDecimalDigit(ch = state.current())) { + state.lastIntValue = 10 * state.lastIntValue + (ch - 0x30 /* 0 */); + state.advance(); + } + return state.pos !== start +}; +function isDecimalDigit(ch) { + return ch >= 0x30 /* 0 */ && ch <= 0x39 /* 9 */ +} + +// https://www.ecma-international.org/ecma-262/8.0/#prod-HexDigits +pp$9.regexp_eatHexDigits = function(state) { + var start = state.pos; + var ch = 0; + state.lastIntValue = 0; + while (isHexDigit(ch = state.current())) { + state.lastIntValue = 16 * state.lastIntValue + hexToInt(ch); + state.advance(); + } + return state.pos !== start +}; +function isHexDigit(ch) { + return ( + (ch >= 0x30 /* 0 */ && ch <= 0x39 /* 9 */) || + (ch >= 0x41 /* A */ && ch <= 0x46 /* F */) || + (ch >= 0x61 /* a */ && ch <= 0x66 /* f */) + ) +} +function hexToInt(ch) { + if (ch >= 0x41 /* A */ && ch <= 0x46 /* F */) { + return 10 + (ch - 0x41 /* A */) + } + if (ch >= 0x61 /* a */ && ch <= 0x66 /* f */) { + return 10 + (ch - 0x61 /* a */) + } + return ch - 0x30 /* 0 */ +} + +// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-LegacyOctalEscapeSequence +// Allows only 0-377(octal) i.e. 0-255(decimal). +pp$9.regexp_eatLegacyOctalEscapeSequence = function(state) { + if (this.regexp_eatOctalDigit(state)) { + var n1 = state.lastIntValue; + if (this.regexp_eatOctalDigit(state)) { + var n2 = state.lastIntValue; + if (n1 <= 3 && this.regexp_eatOctalDigit(state)) { + state.lastIntValue = n1 * 64 + n2 * 8 + state.lastIntValue; + } else { + state.lastIntValue = n1 * 8 + n2; + } + } else { + state.lastIntValue = n1; + } + return true + } + return false +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-OctalDigit +pp$9.regexp_eatOctalDigit = function(state) { + var ch = state.current(); + if (isOctalDigit(ch)) { + state.lastIntValue = ch - 0x30; /* 0 */ + state.advance(); + return true + } + state.lastIntValue = 0; + return false +}; +function isOctalDigit(ch) { + return ch >= 0x30 /* 0 */ && ch <= 0x37 /* 7 */ +} + +// https://www.ecma-international.org/ecma-262/8.0/#prod-Hex4Digits +// https://www.ecma-international.org/ecma-262/8.0/#prod-HexDigit +// And HexDigit HexDigit in https://www.ecma-international.org/ecma-262/8.0/#prod-HexEscapeSequence +pp$9.regexp_eatFixedHexDigits = function(state, length) { + var start = state.pos; + state.lastIntValue = 0; + for (var i = 0; i < length; ++i) { + var ch = state.current(); + if (!isHexDigit(ch)) { + state.pos = start; + return false + } + state.lastIntValue = 16 * state.lastIntValue + hexToInt(ch); + state.advance(); + } + return true +}; + +// Object type used to represent tokens. Note that normally, tokens +// simply exist as properties on the parser object. This is only +// used for the onToken callback and the external tokenizer. + +var Token = function Token(p) { + this.type = p.type; + this.value = p.value; + this.start = p.start; + this.end = p.end; + if (p.options.locations) + { this.loc = new SourceLocation(p, p.startLoc, p.endLoc); } + if (p.options.ranges) + { this.range = [p.start, p.end]; } +}; + +// ## Tokenizer + +var pp$8 = Parser.prototype; + +// Move to the next token + +pp$8.next = function() { + if (this.options.onToken) + { this.options.onToken(new Token(this)); } + + this.lastTokEnd = this.end; + this.lastTokStart = this.start; + this.lastTokEndLoc = this.endLoc; + this.lastTokStartLoc = this.startLoc; + this.nextToken(); +}; + +pp$8.getToken = function() { + this.next(); + return new Token(this) +}; + +// If we're in an ES6 environment, make parsers iterable +if (typeof Symbol !== "undefined") + { pp$8[Symbol.iterator] = function() { + var this$1 = this; + + return { + next: function () { + var token = this$1.getToken(); + return { + done: token.type === types.eof, + value: token + } + } + } + }; } + +// Toggle strict mode. Re-reads the next number or string to please +// pedantic tests (`"use strict"; 010;` should fail). + +pp$8.curContext = function() { + return this.context[this.context.length - 1] +}; + +// Read a single token, updating the parser object's token-related +// properties. + +pp$8.nextToken = function() { + var curContext = this.curContext(); + if (!curContext || !curContext.preserveSpace) { this.skipSpace(); } + + this.start = this.pos; + if (this.options.locations) { this.startLoc = this.curPosition(); } + if (this.pos >= this.input.length) { return this.finishToken(types.eof) } + + if (curContext.override) { return curContext.override(this) } + else { this.readToken(this.fullCharCodeAtPos()); } +}; + +pp$8.readToken = function(code) { + // Identifier or keyword. '\uXXXX' sequences are allowed in + // identifiers, so '\' also dispatches to that. + if (isIdentifierStart(code, this.options.ecmaVersion >= 6) || code === 92 /* '\' */) + { return this.readWord() } + + return this.getTokenFromCode(code) +}; + +pp$8.fullCharCodeAtPos = function() { + var code = this.input.charCodeAt(this.pos); + if (code <= 0xd7ff || code >= 0xe000) { return code } + var next = this.input.charCodeAt(this.pos + 1); + return (code << 10) + next - 0x35fdc00 +}; + +pp$8.skipBlockComment = function() { + var this$1 = this; + + var startLoc = this.options.onComment && this.curPosition(); + var start = this.pos, end = this.input.indexOf("*/", this.pos += 2); + if (end === -1) { this.raise(this.pos - 2, "Unterminated comment"); } + this.pos = end + 2; + if (this.options.locations) { + lineBreakG.lastIndex = start; + var match; + while ((match = lineBreakG.exec(this.input)) && match.index < this.pos) { + ++this$1.curLine; + this$1.lineStart = match.index + match[0].length; + } + } + if (this.options.onComment) + { this.options.onComment(true, this.input.slice(start + 2, end), start, this.pos, + startLoc, this.curPosition()); } +}; + +pp$8.skipLineComment = function(startSkip) { + var this$1 = this; + + var start = this.pos; + var startLoc = this.options.onComment && this.curPosition(); + var ch = this.input.charCodeAt(this.pos += startSkip); + while (this.pos < this.input.length && !isNewLine(ch)) { + ch = this$1.input.charCodeAt(++this$1.pos); + } + if (this.options.onComment) + { this.options.onComment(false, this.input.slice(start + startSkip, this.pos), start, this.pos, + startLoc, this.curPosition()); } +}; + +// Called at the start of the parse and after every token. Skips +// whitespace and comments, and. + +pp$8.skipSpace = function() { + var this$1 = this; + + loop: while (this.pos < this.input.length) { + var ch = this$1.input.charCodeAt(this$1.pos); + switch (ch) { + case 32: case 160: // ' ' + ++this$1.pos; + break + case 13: + if (this$1.input.charCodeAt(this$1.pos + 1) === 10) { + ++this$1.pos; + } + case 10: case 8232: case 8233: + ++this$1.pos; + if (this$1.options.locations) { + ++this$1.curLine; + this$1.lineStart = this$1.pos; + } + break + case 47: // '/' + switch (this$1.input.charCodeAt(this$1.pos + 1)) { + case 42: // '*' + this$1.skipBlockComment(); + break + case 47: + this$1.skipLineComment(2); + break + default: + break loop + } + break + default: + if (ch > 8 && ch < 14 || ch >= 5760 && nonASCIIwhitespace.test(String.fromCharCode(ch))) { + ++this$1.pos; + } else { + break loop + } + } + } +}; + +// Called at the end of every token. Sets `end`, `val`, and +// maintains `context` and `exprAllowed`, and skips the space after +// the token, so that the next one's `start` will point at the +// right position. + +pp$8.finishToken = function(type, val) { + this.end = this.pos; + if (this.options.locations) { this.endLoc = this.curPosition(); } + var prevType = this.type; + this.type = type; + this.value = val; + + this.updateContext(prevType); +}; + +// ### Token reading + +// This is the function that is called to fetch the next token. It +// is somewhat obscure, because it works in character codes rather +// than characters, and because operator parsing has been inlined +// into it. +// +// All in the name of speed. +// +pp$8.readToken_dot = function() { + var next = this.input.charCodeAt(this.pos + 1); + if (next >= 48 && next <= 57) { return this.readNumber(true) } + var next2 = this.input.charCodeAt(this.pos + 2); + if (this.options.ecmaVersion >= 6 && next === 46 && next2 === 46) { // 46 = dot '.' + this.pos += 3; + return this.finishToken(types.ellipsis) + } else { + ++this.pos; + return this.finishToken(types.dot) + } +}; + +pp$8.readToken_slash = function() { // '/' + var next = this.input.charCodeAt(this.pos + 1); + if (this.exprAllowed) { ++this.pos; return this.readRegexp() } + if (next === 61) { return this.finishOp(types.assign, 2) } + return this.finishOp(types.slash, 1) +}; + +pp$8.readToken_mult_modulo_exp = function(code) { // '%*' + var next = this.input.charCodeAt(this.pos + 1); + var size = 1; + var tokentype = code === 42 ? types.star : types.modulo; + + // exponentiation operator ** and **= + if (this.options.ecmaVersion >= 7 && code === 42 && next === 42) { + ++size; + tokentype = types.starstar; + next = this.input.charCodeAt(this.pos + 2); + } + + if (next === 61) { return this.finishOp(types.assign, size + 1) } + return this.finishOp(tokentype, size) +}; + +pp$8.readToken_pipe_amp = function(code) { // '|&' + var next = this.input.charCodeAt(this.pos + 1); + if (next === code) { return this.finishOp(code === 124 ? types.logicalOR : types.logicalAND, 2) } + if (next === 61) { return this.finishOp(types.assign, 2) } + return this.finishOp(code === 124 ? types.bitwiseOR : types.bitwiseAND, 1) +}; + +pp$8.readToken_caret = function() { // '^' + var next = this.input.charCodeAt(this.pos + 1); + if (next === 61) { return this.finishOp(types.assign, 2) } + return this.finishOp(types.bitwiseXOR, 1) +}; + +pp$8.readToken_plus_min = function(code) { // '+-' + var next = this.input.charCodeAt(this.pos + 1); + if (next === code) { + if (next === 45 && !this.inModule && this.input.charCodeAt(this.pos + 2) === 62 && + (this.lastTokEnd === 0 || lineBreak.test(this.input.slice(this.lastTokEnd, this.pos)))) { + // A `-->` line comment + this.skipLineComment(3); + this.skipSpace(); + return this.nextToken() + } + return this.finishOp(types.incDec, 2) + } + if (next === 61) { return this.finishOp(types.assign, 2) } + return this.finishOp(types.plusMin, 1) +}; + +pp$8.readToken_lt_gt = function(code) { // '<>' + var next = this.input.charCodeAt(this.pos + 1); + var size = 1; + if (next === code) { + size = code === 62 && this.input.charCodeAt(this.pos + 2) === 62 ? 3 : 2; + if (this.input.charCodeAt(this.pos + size) === 61) { return this.finishOp(types.assign, size + 1) } + return this.finishOp(types.bitShift, size) + } + if (next === 33 && code === 60 && !this.inModule && this.input.charCodeAt(this.pos + 2) === 45 && + this.input.charCodeAt(this.pos + 3) === 45) { + // `<!--`, an XML-style comment that should be interpreted as a line comment + this.skipLineComment(4); + this.skipSpace(); + return this.nextToken() + } + if (next === 61) { size = 2; } + return this.finishOp(types.relational, size) +}; + +pp$8.readToken_eq_excl = function(code) { // '=!' + var next = this.input.charCodeAt(this.pos + 1); + if (next === 61) { return this.finishOp(types.equality, this.input.charCodeAt(this.pos + 2) === 61 ? 3 : 2) } + if (code === 61 && next === 62 && this.options.ecmaVersion >= 6) { // '=>' + this.pos += 2; + return this.finishToken(types.arrow) + } + return this.finishOp(code === 61 ? types.eq : types.prefix, 1) +}; + +pp$8.getTokenFromCode = function(code) { + switch (code) { + // The interpretation of a dot depends on whether it is followed + // by a digit or another two dots. + case 46: // '.' + return this.readToken_dot() + + // Punctuation tokens. + case 40: ++this.pos; return this.finishToken(types.parenL) + case 41: ++this.pos; return this.finishToken(types.parenR) + case 59: ++this.pos; return this.finishToken(types.semi) + case 44: ++this.pos; return this.finishToken(types.comma) + case 91: ++this.pos; return this.finishToken(types.bracketL) + case 93: ++this.pos; return this.finishToken(types.bracketR) + case 123: ++this.pos; return this.finishToken(types.braceL) + case 125: ++this.pos; return this.finishToken(types.braceR) + case 58: ++this.pos; return this.finishToken(types.colon) + case 63: ++this.pos; return this.finishToken(types.question) + + case 96: // '`' + if (this.options.ecmaVersion < 6) { break } + ++this.pos; + return this.finishToken(types.backQuote) + + case 48: // '0' + var next = this.input.charCodeAt(this.pos + 1); + if (next === 120 || next === 88) { return this.readRadixNumber(16) } // '0x', '0X' - hex number + if (this.options.ecmaVersion >= 6) { + if (next === 111 || next === 79) { return this.readRadixNumber(8) } // '0o', '0O' - octal number + if (next === 98 || next === 66) { return this.readRadixNumber(2) } // '0b', '0B' - binary number + } + + // Anything else beginning with a digit is an integer, octal + // number, or float. + case 49: case 50: case 51: case 52: case 53: case 54: case 55: case 56: case 57: // 1-9 + return this.readNumber(false) + + // Quotes produce strings. + case 34: case 39: // '"', "'" + return this.readString(code) + + // Operators are parsed inline in tiny state machines. '=' (61) is + // often referred to. `finishOp` simply skips the amount of + // characters it is given as second argument, and returns a token + // of the type given by its first argument. + + case 47: // '/' + return this.readToken_slash() + + case 37: case 42: // '%*' + return this.readToken_mult_modulo_exp(code) + + case 124: case 38: // '|&' + return this.readToken_pipe_amp(code) + + case 94: // '^' + return this.readToken_caret() + + case 43: case 45: // '+-' + return this.readToken_plus_min(code) + + case 60: case 62: // '<>' + return this.readToken_lt_gt(code) + + case 61: case 33: // '=!' + return this.readToken_eq_excl(code) + + case 126: // '~' + return this.finishOp(types.prefix, 1) + } + + this.raise(this.pos, "Unexpected character '" + codePointToString(code) + "'"); +}; + +pp$8.finishOp = function(type, size) { + var str = this.input.slice(this.pos, this.pos + size); + this.pos += size; + return this.finishToken(type, str) +}; + +pp$8.readRegexp = function() { + var this$1 = this; + + var escaped, inClass, start = this.pos; + for (;;) { + if (this$1.pos >= this$1.input.length) { this$1.raise(start, "Unterminated regular expression"); } + var ch = this$1.input.charAt(this$1.pos); + if (lineBreak.test(ch)) { this$1.raise(start, "Unterminated regular expression"); } + if (!escaped) { + if (ch === "[") { inClass = true; } + else if (ch === "]" && inClass) { inClass = false; } + else if (ch === "/" && !inClass) { break } + escaped = ch === "\\"; + } else { escaped = false; } + ++this$1.pos; + } + var pattern = this.input.slice(start, this.pos); + ++this.pos; + var flagsStart = this.pos; + var flags = this.readWord1(); + if (this.containsEsc) { this.unexpected(flagsStart); } + + // Validate pattern + var state = this.regexpState || (this.regexpState = new RegExpValidationState(this)); + state.reset(start, pattern, flags); + this.validateRegExpFlags(state); + this.validateRegExpPattern(state); + + // Create Literal#value property value. + var value = null; + try { + value = new RegExp(pattern, flags); + } catch (e) { + // ESTree requires null if it failed to instantiate RegExp object. + // https://github.com/estree/estree/blob/a27003adf4fd7bfad44de9cef372a2eacd527b1c/es5.md#regexpliteral + } + + return this.finishToken(types.regexp, {pattern: pattern, flags: flags, value: value}) +}; + +// Read an integer in the given radix. Return null if zero digits +// were read, the integer value otherwise. When `len` is given, this +// will return `null` unless the integer has exactly `len` digits. + +pp$8.readInt = function(radix, len) { + var this$1 = this; + + var start = this.pos, total = 0; + for (var i = 0, e = len == null ? Infinity : len; i < e; ++i) { + var code = this$1.input.charCodeAt(this$1.pos), val = (void 0); + if (code >= 97) { val = code - 97 + 10; } // a + else if (code >= 65) { val = code - 65 + 10; } // A + else if (code >= 48 && code <= 57) { val = code - 48; } // 0-9 + else { val = Infinity; } + if (val >= radix) { break } + ++this$1.pos; + total = total * radix + val; + } + if (this.pos === start || len != null && this.pos - start !== len) { return null } + + return total +}; + +pp$8.readRadixNumber = function(radix) { + this.pos += 2; // 0x + var val = this.readInt(radix); + if (val == null) { this.raise(this.start + 2, "Expected number in radix " + radix); } + if (isIdentifierStart(this.fullCharCodeAtPos())) { this.raise(this.pos, "Identifier directly after number"); } + return this.finishToken(types.num, val) +}; + +// Read an integer, octal integer, or floating-point number. + +pp$8.readNumber = function(startsWithDot) { + var start = this.pos; + if (!startsWithDot && this.readInt(10) === null) { this.raise(start, "Invalid number"); } + var octal = this.pos - start >= 2 && this.input.charCodeAt(start) === 48; + if (octal && this.strict) { this.raise(start, "Invalid number"); } + if (octal && /[89]/.test(this.input.slice(start, this.pos))) { octal = false; } + var next = this.input.charCodeAt(this.pos); + if (next === 46 && !octal) { // '.' + ++this.pos; + this.readInt(10); + next = this.input.charCodeAt(this.pos); + } + if ((next === 69 || next === 101) && !octal) { // 'eE' + next = this.input.charCodeAt(++this.pos); + if (next === 43 || next === 45) { ++this.pos; } // '+-' + if (this.readInt(10) === null) { this.raise(start, "Invalid number"); } + } + if (isIdentifierStart(this.fullCharCodeAtPos())) { this.raise(this.pos, "Identifier directly after number"); } + + var str = this.input.slice(start, this.pos); + var val = octal ? parseInt(str, 8) : parseFloat(str); + return this.finishToken(types.num, val) +}; + +// Read a string value, interpreting backslash-escapes. + +pp$8.readCodePoint = function() { + var ch = this.input.charCodeAt(this.pos), code; + + if (ch === 123) { // '{' + if (this.options.ecmaVersion < 6) { this.unexpected(); } + var codePos = ++this.pos; + code = this.readHexChar(this.input.indexOf("}", this.pos) - this.pos); + ++this.pos; + if (code > 0x10FFFF) { this.invalidStringToken(codePos, "Code point out of bounds"); } + } else { + code = this.readHexChar(4); + } + return code +}; + +function codePointToString(code) { + // UTF-16 Decoding + if (code <= 0xFFFF) { return String.fromCharCode(code) } + code -= 0x10000; + return String.fromCharCode((code >> 10) + 0xD800, (code & 1023) + 0xDC00) +} + +pp$8.readString = function(quote) { + var this$1 = this; + + var out = "", chunkStart = ++this.pos; + for (;;) { + if (this$1.pos >= this$1.input.length) { this$1.raise(this$1.start, "Unterminated string constant"); } + var ch = this$1.input.charCodeAt(this$1.pos); + if (ch === quote) { break } + if (ch === 92) { // '\' + out += this$1.input.slice(chunkStart, this$1.pos); + out += this$1.readEscapedChar(false); + chunkStart = this$1.pos; + } else { + if (isNewLine(ch, this$1.options.ecmaVersion >= 10)) { this$1.raise(this$1.start, "Unterminated string constant"); } + ++this$1.pos; + } + } + out += this.input.slice(chunkStart, this.pos++); + return this.finishToken(types.string, out) +}; + +// Reads template string tokens. + +var INVALID_TEMPLATE_ESCAPE_ERROR = {}; + +pp$8.tryReadTemplateToken = function() { + this.inTemplateElement = true; + try { + this.readTmplToken(); + } catch (err) { + if (err === INVALID_TEMPLATE_ESCAPE_ERROR) { + this.readInvalidTemplateToken(); + } else { + throw err + } + } + + this.inTemplateElement = false; +}; + +pp$8.invalidStringToken = function(position, message) { + if (this.inTemplateElement && this.options.ecmaVersion >= 9) { + throw INVALID_TEMPLATE_ESCAPE_ERROR + } else { + this.raise(position, message); + } +}; + +pp$8.readTmplToken = function() { + var this$1 = this; + + var out = "", chunkStart = this.pos; + for (;;) { + if (this$1.pos >= this$1.input.length) { this$1.raise(this$1.start, "Unterminated template"); } + var ch = this$1.input.charCodeAt(this$1.pos); + if (ch === 96 || ch === 36 && this$1.input.charCodeAt(this$1.pos + 1) === 123) { // '`', '${' + if (this$1.pos === this$1.start && (this$1.type === types.template || this$1.type === types.invalidTemplate)) { + if (ch === 36) { + this$1.pos += 2; + return this$1.finishToken(types.dollarBraceL) + } else { + ++this$1.pos; + return this$1.finishToken(types.backQuote) + } + } + out += this$1.input.slice(chunkStart, this$1.pos); + return this$1.finishToken(types.template, out) + } + if (ch === 92) { // '\' + out += this$1.input.slice(chunkStart, this$1.pos); + out += this$1.readEscapedChar(true); + chunkStart = this$1.pos; + } else if (isNewLine(ch)) { + out += this$1.input.slice(chunkStart, this$1.pos); + ++this$1.pos; + switch (ch) { + case 13: + if (this$1.input.charCodeAt(this$1.pos) === 10) { ++this$1.pos; } + case 10: + out += "\n"; + break + default: + out += String.fromCharCode(ch); + break + } + if (this$1.options.locations) { + ++this$1.curLine; + this$1.lineStart = this$1.pos; + } + chunkStart = this$1.pos; + } else { + ++this$1.pos; + } + } +}; + +// Reads a template token to search for the end, without validating any escape sequences +pp$8.readInvalidTemplateToken = function() { + var this$1 = this; + + for (; this.pos < this.input.length; this.pos++) { + switch (this$1.input[this$1.pos]) { + case "\\": + ++this$1.pos; + break + + case "$": + if (this$1.input[this$1.pos + 1] !== "{") { + break + } + // falls through + + case "`": + return this$1.finishToken(types.invalidTemplate, this$1.input.slice(this$1.start, this$1.pos)) + + // no default + } + } + this.raise(this.start, "Unterminated template"); +}; + +// Used to read escaped characters + +pp$8.readEscapedChar = function(inTemplate) { + var ch = this.input.charCodeAt(++this.pos); + ++this.pos; + switch (ch) { + case 110: return "\n" // 'n' -> '\n' + case 114: return "\r" // 'r' -> '\r' + case 120: return String.fromCharCode(this.readHexChar(2)) // 'x' + case 117: return codePointToString(this.readCodePoint()) // 'u' + case 116: return "\t" // 't' -> '\t' + case 98: return "\b" // 'b' -> '\b' + case 118: return "\u000b" // 'v' -> '\u000b' + case 102: return "\f" // 'f' -> '\f' + case 13: if (this.input.charCodeAt(this.pos) === 10) { ++this.pos; } // '\r\n' + case 10: // ' \n' + if (this.options.locations) { this.lineStart = this.pos; ++this.curLine; } + return "" + default: + if (ch >= 48 && ch <= 55) { + var octalStr = this.input.substr(this.pos - 1, 3).match(/^[0-7]+/)[0]; + var octal = parseInt(octalStr, 8); + if (octal > 255) { + octalStr = octalStr.slice(0, -1); + octal = parseInt(octalStr, 8); + } + this.pos += octalStr.length - 1; + ch = this.input.charCodeAt(this.pos); + if ((octalStr !== "0" || ch === 56 || ch === 57) && (this.strict || inTemplate)) { + this.invalidStringToken( + this.pos - 1 - octalStr.length, + inTemplate + ? "Octal literal in template string" + : "Octal literal in strict mode" + ); + } + return String.fromCharCode(octal) + } + return String.fromCharCode(ch) + } +}; + +// Used to read character escape sequences ('\x', '\u', '\U'). + +pp$8.readHexChar = function(len) { + var codePos = this.pos; + var n = this.readInt(16, len); + if (n === null) { this.invalidStringToken(codePos, "Bad character escape sequence"); } + return n +}; + +// Read an identifier, and return it as a string. Sets `this.containsEsc` +// to whether the word contained a '\u' escape. +// +// Incrementally adds only escaped chars, adding other chunks as-is +// as a micro-optimization. + +pp$8.readWord1 = function() { + var this$1 = this; + + this.containsEsc = false; + var word = "", first = true, chunkStart = this.pos; + var astral = this.options.ecmaVersion >= 6; + while (this.pos < this.input.length) { + var ch = this$1.fullCharCodeAtPos(); + if (isIdentifierChar(ch, astral)) { + this$1.pos += ch <= 0xffff ? 1 : 2; + } else if (ch === 92) { // "\" + this$1.containsEsc = true; + word += this$1.input.slice(chunkStart, this$1.pos); + var escStart = this$1.pos; + if (this$1.input.charCodeAt(++this$1.pos) !== 117) // "u" + { this$1.invalidStringToken(this$1.pos, "Expecting Unicode escape sequence \\uXXXX"); } + ++this$1.pos; + var esc = this$1.readCodePoint(); + if (!(first ? isIdentifierStart : isIdentifierChar)(esc, astral)) + { this$1.invalidStringToken(escStart, "Invalid Unicode escape"); } + word += codePointToString(esc); + chunkStart = this$1.pos; + } else { + break + } + first = false; + } + return word + this.input.slice(chunkStart, this.pos) +}; + +// Read an identifier or keyword token. Will check for reserved +// words when necessary. + +pp$8.readWord = function() { + var word = this.readWord1(); + var type = types.name; + if (this.keywords.test(word)) { + if (this.containsEsc) { this.raiseRecoverable(this.start, "Escape sequence in keyword " + word); } + type = keywords$1[word]; + } + return this.finishToken(type, word) +}; + +// Acorn is a tiny, fast JavaScript parser written in JavaScript. +// +// Acorn was written by Marijn Haverbeke, Ingvar Stepanyan, and +// various contributors and released under an MIT license. +// +// Git repositories for Acorn are available at +// +// http://marijnhaverbeke.nl/git/acorn +// https://github.com/acornjs/acorn.git +// +// Please use the [github bug tracker][ghbt] to report issues. +// +// [ghbt]: https://github.com/acornjs/acorn/issues +// +// This file defines the main parser interface. The library also comes +// with a [error-tolerant parser][dammit] and an +// [abstract syntax tree walker][walk], defined in other files. +// +// [dammit]: acorn_loose.js +// [walk]: util/walk.js + +var version = "5.7.3"; + +// The main exported interface (under `self.acorn` when in the +// browser) is a `parse` function that takes a code string and +// returns an abstract syntax tree as specified by [Mozilla parser +// API][api]. +// +// [api]: https://developer.mozilla.org/en-US/docs/SpiderMonkey/Parser_API + +function parse(input, options) { + return new Parser(options, input).parse() +} + +// This function tries to parse a single expression at a given +// offset in a string. Useful for parsing mixed-language formats +// that embed JavaScript expressions. + +function parseExpressionAt(input, pos, options) { + var p = new Parser(options, input, pos); + p.nextToken(); + return p.parseExpression() +} + +// Acorn is organized as a tokenizer and a recursive-descent parser. +// The `tokenizer` export provides an interface to the tokenizer. + +function tokenizer(input, options) { + return new Parser(options, input) +} + +// This is a terrible kludge to support the existing, pre-ES6 +// interface where the loose parser module retroactively adds exports +// to this module. +var parse_dammit; +var LooseParser; +var pluginsLoose; // eslint-disable-line camelcase +function addLooseExports(parse, Parser$$1, plugins$$1) { + parse_dammit = parse; // eslint-disable-line camelcase + LooseParser = Parser$$1; + pluginsLoose = plugins$$1; +} + +export { version, parse, parseExpressionAt, tokenizer, parse_dammit, LooseParser, pluginsLoose, addLooseExports, Parser, plugins, defaultOptions, Position, SourceLocation, getLineInfo, Node, TokenType, types as tokTypes, keywords$1 as keywordTypes, TokContext, types$1 as tokContexts, isIdentifierChar, isIdentifierStart, Token, isNewLine, lineBreak, lineBreakG, nonASCIIwhitespace }; diff --git a/node_modules/acorn/dist/acorn.js b/node_modules/acorn/dist/acorn.js new file mode 100644 index 00000000..dada6a37 --- /dev/null +++ b/node_modules/acorn/dist/acorn.js @@ -0,0 +1,5345 @@ +(function (global, factory) { + typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) : + typeof define === 'function' && define.amd ? define(['exports'], factory) : + (factory((global.acorn = {}))); +}(this, (function (exports) { 'use strict'; + +// Reserved word lists for various dialects of the language + +var reservedWords = { + 3: "abstract boolean byte char class double enum export extends final float goto implements import int interface long native package private protected public short static super synchronized throws transient volatile", + 5: "class enum extends super const export import", + 6: "enum", + strict: "implements interface let package private protected public static yield", + strictBind: "eval arguments" +}; + +// And the keywords + +var ecma5AndLessKeywords = "break case catch continue debugger default do else finally for function if return switch throw try var while with null true false instanceof typeof void delete new in this"; + +var keywords = { + 5: ecma5AndLessKeywords, + 6: ecma5AndLessKeywords + " const class extends export import super" +}; + +var keywordRelationalOperator = /^in(stanceof)?$/; + +// ## Character categories + +// Big ugly regular expressions that match characters in the +// whitespace, identifier, and identifier-start categories. These +// are only applied when a character is found to actually have a +// code point above 128. +// Generated by `bin/generate-identifier-regex.js`. + +var nonASCIIidentifierStartChars = "\xaa\xb5\xba\xc0-\xd6\xd8-\xf6\xf8-\u02c1\u02c6-\u02d1\u02e0-\u02e4\u02ec\u02ee\u0370-\u0374\u0376\u0377\u037a-\u037d\u037f\u0386\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03f5\u03f7-\u0481\u048a-\u052f\u0531-\u0556\u0559\u0560-\u0588\u05d0-\u05ea\u05ef-\u05f2\u0620-\u064a\u066e\u066f\u0671-\u06d3\u06d5\u06e5\u06e6\u06ee\u06ef\u06fa-\u06fc\u06ff\u0710\u0712-\u072f\u074d-\u07a5\u07b1\u07ca-\u07ea\u07f4\u07f5\u07fa\u0800-\u0815\u081a\u0824\u0828\u0840-\u0858\u0860-\u086a\u08a0-\u08b4\u08b6-\u08bd\u0904-\u0939\u093d\u0950\u0958-\u0961\u0971-\u0980\u0985-\u098c\u098f\u0990\u0993-\u09a8\u09aa-\u09b0\u09b2\u09b6-\u09b9\u09bd\u09ce\u09dc\u09dd\u09df-\u09e1\u09f0\u09f1\u09fc\u0a05-\u0a0a\u0a0f\u0a10\u0a13-\u0a28\u0a2a-\u0a30\u0a32\u0a33\u0a35\u0a36\u0a38\u0a39\u0a59-\u0a5c\u0a5e\u0a72-\u0a74\u0a85-\u0a8d\u0a8f-\u0a91\u0a93-\u0aa8\u0aaa-\u0ab0\u0ab2\u0ab3\u0ab5-\u0ab9\u0abd\u0ad0\u0ae0\u0ae1\u0af9\u0b05-\u0b0c\u0b0f\u0b10\u0b13-\u0b28\u0b2a-\u0b30\u0b32\u0b33\u0b35-\u0b39\u0b3d\u0b5c\u0b5d\u0b5f-\u0b61\u0b71\u0b83\u0b85-\u0b8a\u0b8e-\u0b90\u0b92-\u0b95\u0b99\u0b9a\u0b9c\u0b9e\u0b9f\u0ba3\u0ba4\u0ba8-\u0baa\u0bae-\u0bb9\u0bd0\u0c05-\u0c0c\u0c0e-\u0c10\u0c12-\u0c28\u0c2a-\u0c39\u0c3d\u0c58-\u0c5a\u0c60\u0c61\u0c80\u0c85-\u0c8c\u0c8e-\u0c90\u0c92-\u0ca8\u0caa-\u0cb3\u0cb5-\u0cb9\u0cbd\u0cde\u0ce0\u0ce1\u0cf1\u0cf2\u0d05-\u0d0c\u0d0e-\u0d10\u0d12-\u0d3a\u0d3d\u0d4e\u0d54-\u0d56\u0d5f-\u0d61\u0d7a-\u0d7f\u0d85-\u0d96\u0d9a-\u0db1\u0db3-\u0dbb\u0dbd\u0dc0-\u0dc6\u0e01-\u0e30\u0e32\u0e33\u0e40-\u0e46\u0e81\u0e82\u0e84\u0e87\u0e88\u0e8a\u0e8d\u0e94-\u0e97\u0e99-\u0e9f\u0ea1-\u0ea3\u0ea5\u0ea7\u0eaa\u0eab\u0ead-\u0eb0\u0eb2\u0eb3\u0ebd\u0ec0-\u0ec4\u0ec6\u0edc-\u0edf\u0f00\u0f40-\u0f47\u0f49-\u0f6c\u0f88-\u0f8c\u1000-\u102a\u103f\u1050-\u1055\u105a-\u105d\u1061\u1065\u1066\u106e-\u1070\u1075-\u1081\u108e\u10a0-\u10c5\u10c7\u10cd\u10d0-\u10fa\u10fc-\u1248\u124a-\u124d\u1250-\u1256\u1258\u125a-\u125d\u1260-\u1288\u128a-\u128d\u1290-\u12b0\u12b2-\u12b5\u12b8-\u12be\u12c0\u12c2-\u12c5\u12c8-\u12d6\u12d8-\u1310\u1312-\u1315\u1318-\u135a\u1380-\u138f\u13a0-\u13f5\u13f8-\u13fd\u1401-\u166c\u166f-\u167f\u1681-\u169a\u16a0-\u16ea\u16ee-\u16f8\u1700-\u170c\u170e-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176c\u176e-\u1770\u1780-\u17b3\u17d7\u17dc\u1820-\u1878\u1880-\u18a8\u18aa\u18b0-\u18f5\u1900-\u191e\u1950-\u196d\u1970-\u1974\u1980-\u19ab\u19b0-\u19c9\u1a00-\u1a16\u1a20-\u1a54\u1aa7\u1b05-\u1b33\u1b45-\u1b4b\u1b83-\u1ba0\u1bae\u1baf\u1bba-\u1be5\u1c00-\u1c23\u1c4d-\u1c4f\u1c5a-\u1c7d\u1c80-\u1c88\u1c90-\u1cba\u1cbd-\u1cbf\u1ce9-\u1cec\u1cee-\u1cf1\u1cf5\u1cf6\u1d00-\u1dbf\u1e00-\u1f15\u1f18-\u1f1d\u1f20-\u1f45\u1f48-\u1f4d\u1f50-\u1f57\u1f59\u1f5b\u1f5d\u1f5f-\u1f7d\u1f80-\u1fb4\u1fb6-\u1fbc\u1fbe\u1fc2-\u1fc4\u1fc6-\u1fcc\u1fd0-\u1fd3\u1fd6-\u1fdb\u1fe0-\u1fec\u1ff2-\u1ff4\u1ff6-\u1ffc\u2071\u207f\u2090-\u209c\u2102\u2107\u210a-\u2113\u2115\u2118-\u211d\u2124\u2126\u2128\u212a-\u2139\u213c-\u213f\u2145-\u2149\u214e\u2160-\u2188\u2c00-\u2c2e\u2c30-\u2c5e\u2c60-\u2ce4\u2ceb-\u2cee\u2cf2\u2cf3\u2d00-\u2d25\u2d27\u2d2d\u2d30-\u2d67\u2d6f\u2d80-\u2d96\u2da0-\u2da6\u2da8-\u2dae\u2db0-\u2db6\u2db8-\u2dbe\u2dc0-\u2dc6\u2dc8-\u2dce\u2dd0-\u2dd6\u2dd8-\u2dde\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303c\u3041-\u3096\u309b-\u309f\u30a1-\u30fa\u30fc-\u30ff\u3105-\u312f\u3131-\u318e\u31a0-\u31ba\u31f0-\u31ff\u3400-\u4db5\u4e00-\u9fef\ua000-\ua48c\ua4d0-\ua4fd\ua500-\ua60c\ua610-\ua61f\ua62a\ua62b\ua640-\ua66e\ua67f-\ua69d\ua6a0-\ua6ef\ua717-\ua71f\ua722-\ua788\ua78b-\ua7b9\ua7f7-\ua801\ua803-\ua805\ua807-\ua80a\ua80c-\ua822\ua840-\ua873\ua882-\ua8b3\ua8f2-\ua8f7\ua8fb\ua8fd\ua8fe\ua90a-\ua925\ua930-\ua946\ua960-\ua97c\ua984-\ua9b2\ua9cf\ua9e0-\ua9e4\ua9e6-\ua9ef\ua9fa-\ua9fe\uaa00-\uaa28\uaa40-\uaa42\uaa44-\uaa4b\uaa60-\uaa76\uaa7a\uaa7e-\uaaaf\uaab1\uaab5\uaab6\uaab9-\uaabd\uaac0\uaac2\uaadb-\uaadd\uaae0-\uaaea\uaaf2-\uaaf4\uab01-\uab06\uab09-\uab0e\uab11-\uab16\uab20-\uab26\uab28-\uab2e\uab30-\uab5a\uab5c-\uab65\uab70-\uabe2\uac00-\ud7a3\ud7b0-\ud7c6\ud7cb-\ud7fb\uf900-\ufa6d\ufa70-\ufad9\ufb00-\ufb06\ufb13-\ufb17\ufb1d\ufb1f-\ufb28\ufb2a-\ufb36\ufb38-\ufb3c\ufb3e\ufb40\ufb41\ufb43\ufb44\ufb46-\ufbb1\ufbd3-\ufd3d\ufd50-\ufd8f\ufd92-\ufdc7\ufdf0-\ufdfb\ufe70-\ufe74\ufe76-\ufefc\uff21-\uff3a\uff41-\uff5a\uff66-\uffbe\uffc2-\uffc7\uffca-\uffcf\uffd2-\uffd7\uffda-\uffdc"; +var nonASCIIidentifierChars = "\u200c\u200d\xb7\u0300-\u036f\u0387\u0483-\u0487\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u0669\u0670\u06d6-\u06dc\u06df-\u06e4\u06e7\u06e8\u06ea-\u06ed\u06f0-\u06f9\u0711\u0730-\u074a\u07a6-\u07b0\u07c0-\u07c9\u07eb-\u07f3\u07fd\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0859-\u085b\u08d3-\u08e1\u08e3-\u0903\u093a-\u093c\u093e-\u094f\u0951-\u0957\u0962\u0963\u0966-\u096f\u0981-\u0983\u09bc\u09be-\u09c4\u09c7\u09c8\u09cb-\u09cd\u09d7\u09e2\u09e3\u09e6-\u09ef\u09fe\u0a01-\u0a03\u0a3c\u0a3e-\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a66-\u0a71\u0a75\u0a81-\u0a83\u0abc\u0abe-\u0ac5\u0ac7-\u0ac9\u0acb-\u0acd\u0ae2\u0ae3\u0ae6-\u0aef\u0afa-\u0aff\u0b01-\u0b03\u0b3c\u0b3e-\u0b44\u0b47\u0b48\u0b4b-\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b66-\u0b6f\u0b82\u0bbe-\u0bc2\u0bc6-\u0bc8\u0bca-\u0bcd\u0bd7\u0be6-\u0bef\u0c00-\u0c04\u0c3e-\u0c44\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0c66-\u0c6f\u0c81-\u0c83\u0cbc\u0cbe-\u0cc4\u0cc6-\u0cc8\u0cca-\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0ce6-\u0cef\u0d00-\u0d03\u0d3b\u0d3c\u0d3e-\u0d44\u0d46-\u0d48\u0d4a-\u0d4d\u0d57\u0d62\u0d63\u0d66-\u0d6f\u0d82\u0d83\u0dca\u0dcf-\u0dd4\u0dd6\u0dd8-\u0ddf\u0de6-\u0def\u0df2\u0df3\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0e50-\u0e59\u0eb1\u0eb4-\u0eb9\u0ebb\u0ebc\u0ec8-\u0ecd\u0ed0-\u0ed9\u0f18\u0f19\u0f20-\u0f29\u0f35\u0f37\u0f39\u0f3e\u0f3f\u0f71-\u0f84\u0f86\u0f87\u0f8d-\u0f97\u0f99-\u0fbc\u0fc6\u102b-\u103e\u1040-\u1049\u1056-\u1059\u105e-\u1060\u1062-\u1064\u1067-\u106d\u1071-\u1074\u1082-\u108d\u108f-\u109d\u135d-\u135f\u1369-\u1371\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b4-\u17d3\u17dd\u17e0-\u17e9\u180b-\u180d\u1810-\u1819\u18a9\u1920-\u192b\u1930-\u193b\u1946-\u194f\u19d0-\u19da\u1a17-\u1a1b\u1a55-\u1a5e\u1a60-\u1a7c\u1a7f-\u1a89\u1a90-\u1a99\u1ab0-\u1abd\u1b00-\u1b04\u1b34-\u1b44\u1b50-\u1b59\u1b6b-\u1b73\u1b80-\u1b82\u1ba1-\u1bad\u1bb0-\u1bb9\u1be6-\u1bf3\u1c24-\u1c37\u1c40-\u1c49\u1c50-\u1c59\u1cd0-\u1cd2\u1cd4-\u1ce8\u1ced\u1cf2-\u1cf4\u1cf7-\u1cf9\u1dc0-\u1df9\u1dfb-\u1dff\u203f\u2040\u2054\u20d0-\u20dc\u20e1\u20e5-\u20f0\u2cef-\u2cf1\u2d7f\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua620-\ua629\ua66f\ua674-\ua67d\ua69e\ua69f\ua6f0\ua6f1\ua802\ua806\ua80b\ua823-\ua827\ua880\ua881\ua8b4-\ua8c5\ua8d0-\ua8d9\ua8e0-\ua8f1\ua8ff-\ua909\ua926-\ua92d\ua947-\ua953\ua980-\ua983\ua9b3-\ua9c0\ua9d0-\ua9d9\ua9e5\ua9f0-\ua9f9\uaa29-\uaa36\uaa43\uaa4c\uaa4d\uaa50-\uaa59\uaa7b-\uaa7d\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uaaeb-\uaaef\uaaf5\uaaf6\uabe3-\uabea\uabec\uabed\uabf0-\uabf9\ufb1e\ufe00-\ufe0f\ufe20-\ufe2f\ufe33\ufe34\ufe4d-\ufe4f\uff10-\uff19\uff3f"; + +var nonASCIIidentifierStart = new RegExp("[" + nonASCIIidentifierStartChars + "]"); +var nonASCIIidentifier = new RegExp("[" + nonASCIIidentifierStartChars + nonASCIIidentifierChars + "]"); + +nonASCIIidentifierStartChars = nonASCIIidentifierChars = null; + +// These are a run-length and offset encoded representation of the +// >0xffff code points that are a valid part of identifiers. The +// offset starts at 0x10000, and each pair of numbers represents an +// offset to the next range, and then a size of the range. They were +// generated by bin/generate-identifier-regex.js + +// eslint-disable-next-line comma-spacing +var astralIdentifierStartCodes = [0,11,2,25,2,18,2,1,2,14,3,13,35,122,70,52,268,28,4,48,48,31,14,29,6,37,11,29,3,35,5,7,2,4,43,157,19,35,5,35,5,39,9,51,157,310,10,21,11,7,153,5,3,0,2,43,2,1,4,0,3,22,11,22,10,30,66,18,2,1,11,21,11,25,71,55,7,1,65,0,16,3,2,2,2,28,43,28,4,28,36,7,2,27,28,53,11,21,11,18,14,17,111,72,56,50,14,50,14,35,477,28,11,0,9,21,190,52,76,44,33,24,27,35,30,0,12,34,4,0,13,47,15,3,22,0,2,0,36,17,2,24,85,6,2,0,2,3,2,14,2,9,8,46,39,7,3,1,3,21,2,6,2,1,2,4,4,0,19,0,13,4,159,52,19,3,54,47,21,1,2,0,185,46,42,3,37,47,21,0,60,42,86,26,230,43,117,63,32,0,257,0,11,39,8,0,22,0,12,39,3,3,20,0,35,56,264,8,2,36,18,0,50,29,113,6,2,1,2,37,22,0,26,5,2,1,2,31,15,0,328,18,270,921,103,110,18,195,2749,1070,4050,582,8634,568,8,30,114,29,19,47,17,3,32,20,6,18,689,63,129,68,12,0,67,12,65,1,31,6129,15,754,9486,286,82,395,2309,106,6,12,4,8,8,9,5991,84,2,70,2,1,3,0,3,1,3,3,2,11,2,0,2,6,2,64,2,3,3,7,2,6,2,27,2,3,2,4,2,0,4,6,2,339,3,24,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,7,4149,196,60,67,1213,3,2,26,2,1,2,0,3,0,2,9,2,3,2,0,2,0,7,0,5,0,2,0,2,0,2,2,2,1,2,0,3,0,2,0,2,0,2,0,2,0,2,1,2,0,3,3,2,6,2,3,2,3,2,0,2,9,2,16,6,2,2,4,2,16,4421,42710,42,4148,12,221,3,5761,15,7472,3104,541]; + +// eslint-disable-next-line comma-spacing +var astralIdentifierCodes = [509,0,227,0,150,4,294,9,1368,2,2,1,6,3,41,2,5,0,166,1,574,3,9,9,525,10,176,2,54,14,32,9,16,3,46,10,54,9,7,2,37,13,2,9,6,1,45,0,13,2,49,13,9,3,4,9,83,11,7,0,161,11,6,9,7,3,56,1,2,6,3,1,3,2,10,0,11,1,3,6,4,4,193,17,10,9,5,0,82,19,13,9,214,6,3,8,28,1,83,16,16,9,82,12,9,9,84,14,5,9,243,14,166,9,280,9,41,6,2,3,9,0,10,10,47,15,406,7,2,7,17,9,57,21,2,13,123,5,4,0,2,1,2,6,2,0,9,9,49,4,2,1,2,4,9,9,330,3,19306,9,135,4,60,6,26,9,1016,45,17,3,19723,1,5319,4,4,5,9,7,3,6,31,3,149,2,1418,49,513,54,5,49,9,0,15,0,23,4,2,14,1361,6,2,16,3,6,2,1,2,4,2214,6,110,6,6,9,792487,239]; + +// This has a complexity linear to the value of the code. The +// assumption is that looking up astral identifier characters is +// rare. +function isInAstralSet(code, set) { + var pos = 0x10000; + for (var i = 0; i < set.length; i += 2) { + pos += set[i]; + if (pos > code) { return false } + pos += set[i + 1]; + if (pos >= code) { return true } + } +} + +// Test whether a given character code starts an identifier. + +function isIdentifierStart(code, astral) { + if (code < 65) { return code === 36 } + if (code < 91) { return true } + if (code < 97) { return code === 95 } + if (code < 123) { return true } + if (code <= 0xffff) { return code >= 0xaa && nonASCIIidentifierStart.test(String.fromCharCode(code)) } + if (astral === false) { return false } + return isInAstralSet(code, astralIdentifierStartCodes) +} + +// Test whether a given character is part of an identifier. + +function isIdentifierChar(code, astral) { + if (code < 48) { return code === 36 } + if (code < 58) { return true } + if (code < 65) { return false } + if (code < 91) { return true } + if (code < 97) { return code === 95 } + if (code < 123) { return true } + if (code <= 0xffff) { return code >= 0xaa && nonASCIIidentifier.test(String.fromCharCode(code)) } + if (astral === false) { return false } + return isInAstralSet(code, astralIdentifierStartCodes) || isInAstralSet(code, astralIdentifierCodes) +} + +// ## Token types + +// The assignment of fine-grained, information-carrying type objects +// allows the tokenizer to store the information it has about a +// token in a way that is very cheap for the parser to look up. + +// All token type variables start with an underscore, to make them +// easy to recognize. + +// The `beforeExpr` property is used to disambiguate between regular +// expressions and divisions. It is set on all token types that can +// be followed by an expression (thus, a slash after them would be a +// regular expression). +// +// The `startsExpr` property is used to check if the token ends a +// `yield` expression. It is set on all token types that either can +// directly start an expression (like a quotation mark) or can +// continue an expression (like the body of a string). +// +// `isLoop` marks a keyword as starting a loop, which is important +// to know when parsing a label, in order to allow or disallow +// continue jumps to that label. + +var TokenType = function TokenType(label, conf) { + if ( conf === void 0 ) conf = {}; + + this.label = label; + this.keyword = conf.keyword; + this.beforeExpr = !!conf.beforeExpr; + this.startsExpr = !!conf.startsExpr; + this.isLoop = !!conf.isLoop; + this.isAssign = !!conf.isAssign; + this.prefix = !!conf.prefix; + this.postfix = !!conf.postfix; + this.binop = conf.binop || null; + this.updateContext = null; +}; + +function binop(name, prec) { + return new TokenType(name, {beforeExpr: true, binop: prec}) +} +var beforeExpr = {beforeExpr: true}; +var startsExpr = {startsExpr: true}; + +// Map keyword names to token types. + +var keywords$1 = {}; + +// Succinct definitions of keyword token types +function kw(name, options) { + if ( options === void 0 ) options = {}; + + options.keyword = name; + return keywords$1[name] = new TokenType(name, options) +} + +var types = { + num: new TokenType("num", startsExpr), + regexp: new TokenType("regexp", startsExpr), + string: new TokenType("string", startsExpr), + name: new TokenType("name", startsExpr), + eof: new TokenType("eof"), + + // Punctuation token types. + bracketL: new TokenType("[", {beforeExpr: true, startsExpr: true}), + bracketR: new TokenType("]"), + braceL: new TokenType("{", {beforeExpr: true, startsExpr: true}), + braceR: new TokenType("}"), + parenL: new TokenType("(", {beforeExpr: true, startsExpr: true}), + parenR: new TokenType(")"), + comma: new TokenType(",", beforeExpr), + semi: new TokenType(";", beforeExpr), + colon: new TokenType(":", beforeExpr), + dot: new TokenType("."), + question: new TokenType("?", beforeExpr), + arrow: new TokenType("=>", beforeExpr), + template: new TokenType("template"), + invalidTemplate: new TokenType("invalidTemplate"), + ellipsis: new TokenType("...", beforeExpr), + backQuote: new TokenType("`", startsExpr), + dollarBraceL: new TokenType("${", {beforeExpr: true, startsExpr: true}), + + // Operators. These carry several kinds of properties to help the + // parser use them properly (the presence of these properties is + // what categorizes them as operators). + // + // `binop`, when present, specifies that this operator is a binary + // operator, and will refer to its precedence. + // + // `prefix` and `postfix` mark the operator as a prefix or postfix + // unary operator. + // + // `isAssign` marks all of `=`, `+=`, `-=` etcetera, which act as + // binary operators with a very low precedence, that should result + // in AssignmentExpression nodes. + + eq: new TokenType("=", {beforeExpr: true, isAssign: true}), + assign: new TokenType("_=", {beforeExpr: true, isAssign: true}), + incDec: new TokenType("++/--", {prefix: true, postfix: true, startsExpr: true}), + prefix: new TokenType("!/~", {beforeExpr: true, prefix: true, startsExpr: true}), + logicalOR: binop("||", 1), + logicalAND: binop("&&", 2), + bitwiseOR: binop("|", 3), + bitwiseXOR: binop("^", 4), + bitwiseAND: binop("&", 5), + equality: binop("==/!=/===/!==", 6), + relational: binop("</>/<=/>=", 7), + bitShift: binop("<</>>/>>>", 8), + plusMin: new TokenType("+/-", {beforeExpr: true, binop: 9, prefix: true, startsExpr: true}), + modulo: binop("%", 10), + star: binop("*", 10), + slash: binop("/", 10), + starstar: new TokenType("**", {beforeExpr: true}), + + // Keyword token types. + _break: kw("break"), + _case: kw("case", beforeExpr), + _catch: kw("catch"), + _continue: kw("continue"), + _debugger: kw("debugger"), + _default: kw("default", beforeExpr), + _do: kw("do", {isLoop: true, beforeExpr: true}), + _else: kw("else", beforeExpr), + _finally: kw("finally"), + _for: kw("for", {isLoop: true}), + _function: kw("function", startsExpr), + _if: kw("if"), + _return: kw("return", beforeExpr), + _switch: kw("switch"), + _throw: kw("throw", beforeExpr), + _try: kw("try"), + _var: kw("var"), + _const: kw("const"), + _while: kw("while", {isLoop: true}), + _with: kw("with"), + _new: kw("new", {beforeExpr: true, startsExpr: true}), + _this: kw("this", startsExpr), + _super: kw("super", startsExpr), + _class: kw("class", startsExpr), + _extends: kw("extends", beforeExpr), + _export: kw("export"), + _import: kw("import"), + _null: kw("null", startsExpr), + _true: kw("true", startsExpr), + _false: kw("false", startsExpr), + _in: kw("in", {beforeExpr: true, binop: 7}), + _instanceof: kw("instanceof", {beforeExpr: true, binop: 7}), + _typeof: kw("typeof", {beforeExpr: true, prefix: true, startsExpr: true}), + _void: kw("void", {beforeExpr: true, prefix: true, startsExpr: true}), + _delete: kw("delete", {beforeExpr: true, prefix: true, startsExpr: true}) +}; + +// Matches a whole line break (where CRLF is considered a single +// line break). Used to count lines. + +var lineBreak = /\r\n?|\n|\u2028|\u2029/; +var lineBreakG = new RegExp(lineBreak.source, "g"); + +function isNewLine(code, ecma2019String) { + return code === 10 || code === 13 || (!ecma2019String && (code === 0x2028 || code === 0x2029)) +} + +var nonASCIIwhitespace = /[\u1680\u180e\u2000-\u200a\u202f\u205f\u3000\ufeff]/; + +var skipWhiteSpace = /(?:\s|\/\/.*|\/\*[^]*?\*\/)*/g; + +var ref = Object.prototype; +var hasOwnProperty = ref.hasOwnProperty; +var toString = ref.toString; + +// Checks if an object has a property. + +function has(obj, propName) { + return hasOwnProperty.call(obj, propName) +} + +var isArray = Array.isArray || (function (obj) { return ( + toString.call(obj) === "[object Array]" +); }); + +// These are used when `options.locations` is on, for the +// `startLoc` and `endLoc` properties. + +var Position = function Position(line, col) { + this.line = line; + this.column = col; +}; + +Position.prototype.offset = function offset (n) { + return new Position(this.line, this.column + n) +}; + +var SourceLocation = function SourceLocation(p, start, end) { + this.start = start; + this.end = end; + if (p.sourceFile !== null) { this.source = p.sourceFile; } +}; + +// The `getLineInfo` function is mostly useful when the +// `locations` option is off (for performance reasons) and you +// want to find the line/column position for a given character +// offset. `input` should be the code string that the offset refers +// into. + +function getLineInfo(input, offset) { + for (var line = 1, cur = 0;;) { + lineBreakG.lastIndex = cur; + var match = lineBreakG.exec(input); + if (match && match.index < offset) { + ++line; + cur = match.index + match[0].length; + } else { + return new Position(line, offset - cur) + } + } +} + +// A second optional argument can be given to further configure +// the parser process. These options are recognized: + +var defaultOptions = { + // `ecmaVersion` indicates the ECMAScript version to parse. Must + // be either 3, 5, 6 (2015), 7 (2016), or 8 (2017). This influences support + // for strict mode, the set of reserved words, and support for + // new syntax features. The default is 7. + ecmaVersion: 7, + // `sourceType` indicates the mode the code should be parsed in. + // Can be either `"script"` or `"module"`. This influences global + // strict mode and parsing of `import` and `export` declarations. + sourceType: "script", + // `onInsertedSemicolon` can be a callback that will be called + // when a semicolon is automatically inserted. It will be passed + // th position of the comma as an offset, and if `locations` is + // enabled, it is given the location as a `{line, column}` object + // as second argument. + onInsertedSemicolon: null, + // `onTrailingComma` is similar to `onInsertedSemicolon`, but for + // trailing commas. + onTrailingComma: null, + // By default, reserved words are only enforced if ecmaVersion >= 5. + // Set `allowReserved` to a boolean value to explicitly turn this on + // an off. When this option has the value "never", reserved words + // and keywords can also not be used as property names. + allowReserved: null, + // When enabled, a return at the top level is not considered an + // error. + allowReturnOutsideFunction: false, + // When enabled, import/export statements are not constrained to + // appearing at the top of the program. + allowImportExportEverywhere: false, + // When enabled, await identifiers are allowed to appear at the top-level scope, + // but they are still not allowed in non-async functions. + allowAwaitOutsideFunction: false, + // When enabled, hashbang directive in the beginning of file + // is allowed and treated as a line comment. + allowHashBang: false, + // When `locations` is on, `loc` properties holding objects with + // `start` and `end` properties in `{line, column}` form (with + // line being 1-based and column 0-based) will be attached to the + // nodes. + locations: false, + // A function can be passed as `onToken` option, which will + // cause Acorn to call that function with object in the same + // format as tokens returned from `tokenizer().getToken()`. Note + // that you are not allowed to call the parser from the + // callback—that will corrupt its internal state. + onToken: null, + // A function can be passed as `onComment` option, which will + // cause Acorn to call that function with `(block, text, start, + // end)` parameters whenever a comment is skipped. `block` is a + // boolean indicating whether this is a block (`/* */`) comment, + // `text` is the content of the comment, and `start` and `end` are + // character offsets that denote the start and end of the comment. + // When the `locations` option is on, two more parameters are + // passed, the full `{line, column}` locations of the start and + // end of the comments. Note that you are not allowed to call the + // parser from the callback—that will corrupt its internal state. + onComment: null, + // Nodes have their start and end characters offsets recorded in + // `start` and `end` properties (directly on the node, rather than + // the `loc` object, which holds line/column data. To also add a + // [semi-standardized][range] `range` property holding a `[start, + // end]` array with the same numbers, set the `ranges` option to + // `true`. + // + // [range]: https://bugzilla.mozilla.org/show_bug.cgi?id=745678 + ranges: false, + // It is possible to parse multiple files into a single AST by + // passing the tree produced by parsing the first file as + // `program` option in subsequent parses. This will add the + // toplevel forms of the parsed file to the `Program` (top) node + // of an existing parse tree. + program: null, + // When `locations` is on, you can pass this to record the source + // file in every node's `loc` object. + sourceFile: null, + // This value, if given, is stored in every node, whether + // `locations` is on or off. + directSourceFile: null, + // When enabled, parenthesized expressions are represented by + // (non-standard) ParenthesizedExpression nodes + preserveParens: false, + plugins: {} +}; + +// Interpret and default an options object + +function getOptions(opts) { + var options = {}; + + for (var opt in defaultOptions) + { options[opt] = opts && has(opts, opt) ? opts[opt] : defaultOptions[opt]; } + + if (options.ecmaVersion >= 2015) + { options.ecmaVersion -= 2009; } + + if (options.allowReserved == null) + { options.allowReserved = options.ecmaVersion < 5; } + + if (isArray(options.onToken)) { + var tokens = options.onToken; + options.onToken = function (token) { return tokens.push(token); }; + } + if (isArray(options.onComment)) + { options.onComment = pushComment(options, options.onComment); } + + return options +} + +function pushComment(options, array) { + return function(block, text, start, end, startLoc, endLoc) { + var comment = { + type: block ? "Block" : "Line", + value: text, + start: start, + end: end + }; + if (options.locations) + { comment.loc = new SourceLocation(this, startLoc, endLoc); } + if (options.ranges) + { comment.range = [start, end]; } + array.push(comment); + } +} + +// Registered plugins +var plugins = {}; + +function keywordRegexp(words) { + return new RegExp("^(?:" + words.replace(/ /g, "|") + ")$") +} + +var Parser = function Parser(options, input, startPos) { + this.options = options = getOptions(options); + this.sourceFile = options.sourceFile; + this.keywords = keywordRegexp(keywords[options.ecmaVersion >= 6 ? 6 : 5]); + var reserved = ""; + if (!options.allowReserved) { + for (var v = options.ecmaVersion;; v--) + { if (reserved = reservedWords[v]) { break } } + if (options.sourceType === "module") { reserved += " await"; } + } + this.reservedWords = keywordRegexp(reserved); + var reservedStrict = (reserved ? reserved + " " : "") + reservedWords.strict; + this.reservedWordsStrict = keywordRegexp(reservedStrict); + this.reservedWordsStrictBind = keywordRegexp(reservedStrict + " " + reservedWords.strictBind); + this.input = String(input); + + // Used to signal to callers of `readWord1` whether the word + // contained any escape sequences. This is needed because words with + // escape sequences must not be interpreted as keywords. + this.containsEsc = false; + + // Load plugins + this.loadPlugins(options.plugins); + + // Set up token state + + // The current position of the tokenizer in the input. + if (startPos) { + this.pos = startPos; + this.lineStart = this.input.lastIndexOf("\n", startPos - 1) + 1; + this.curLine = this.input.slice(0, this.lineStart).split(lineBreak).length; + } else { + this.pos = this.lineStart = 0; + this.curLine = 1; + } + + // Properties of the current token: + // Its type + this.type = types.eof; + // For tokens that include more information than their type, the value + this.value = null; + // Its start and end offset + this.start = this.end = this.pos; + // And, if locations are used, the {line, column} object + // corresponding to those offsets + this.startLoc = this.endLoc = this.curPosition(); + + // Position information for the previous token + this.lastTokEndLoc = this.lastTokStartLoc = null; + this.lastTokStart = this.lastTokEnd = this.pos; + + // The context stack is used to superficially track syntactic + // context to predict whether a regular expression is allowed in a + // given position. + this.context = this.initialContext(); + this.exprAllowed = true; + + // Figure out if it's a module code. + this.inModule = options.sourceType === "module"; + this.strict = this.inModule || this.strictDirective(this.pos); + + // Used to signify the start of a potential arrow function + this.potentialArrowAt = -1; + + // Flags to track whether we are in a function, a generator, an async function. + this.inFunction = this.inGenerator = this.inAsync = false; + // Positions to delayed-check that yield/await does not exist in default parameters. + this.yieldPos = this.awaitPos = 0; + // Labels in scope. + this.labels = []; + + // If enabled, skip leading hashbang line. + if (this.pos === 0 && options.allowHashBang && this.input.slice(0, 2) === "#!") + { this.skipLineComment(2); } + + // Scope tracking for duplicate variable names (see scope.js) + this.scopeStack = []; + this.enterFunctionScope(); + + // For RegExp validation + this.regexpState = null; +}; + +// DEPRECATED Kept for backwards compatibility until 3.0 in case a plugin uses them +Parser.prototype.isKeyword = function isKeyword (word) { return this.keywords.test(word) }; +Parser.prototype.isReservedWord = function isReservedWord (word) { return this.reservedWords.test(word) }; + +Parser.prototype.extend = function extend (name, f) { + this[name] = f(this[name]); +}; + +Parser.prototype.loadPlugins = function loadPlugins (pluginConfigs) { + var this$1 = this; + + for (var name in pluginConfigs) { + var plugin = plugins[name]; + if (!plugin) { throw new Error("Plugin '" + name + "' not found") } + plugin(this$1, pluginConfigs[name]); + } +}; + +Parser.prototype.parse = function parse () { + var node = this.options.program || this.startNode(); + this.nextToken(); + return this.parseTopLevel(node) +}; + +var pp = Parser.prototype; + +// ## Parser utilities + +var literal = /^(?:'((?:\\.|[^'])*?)'|"((?:\\.|[^"])*?)"|;)/; +pp.strictDirective = function(start) { + var this$1 = this; + + for (;;) { + skipWhiteSpace.lastIndex = start; + start += skipWhiteSpace.exec(this$1.input)[0].length; + var match = literal.exec(this$1.input.slice(start)); + if (!match) { return false } + if ((match[1] || match[2]) === "use strict") { return true } + start += match[0].length; + } +}; + +// Predicate that tests whether the next token is of the given +// type, and if yes, consumes it as a side effect. + +pp.eat = function(type) { + if (this.type === type) { + this.next(); + return true + } else { + return false + } +}; + +// Tests whether parsed token is a contextual keyword. + +pp.isContextual = function(name) { + return this.type === types.name && this.value === name && !this.containsEsc +}; + +// Consumes contextual keyword if possible. + +pp.eatContextual = function(name) { + if (!this.isContextual(name)) { return false } + this.next(); + return true +}; + +// Asserts that following token is given contextual keyword. + +pp.expectContextual = function(name) { + if (!this.eatContextual(name)) { this.unexpected(); } +}; + +// Test whether a semicolon can be inserted at the current position. + +pp.canInsertSemicolon = function() { + return this.type === types.eof || + this.type === types.braceR || + lineBreak.test(this.input.slice(this.lastTokEnd, this.start)) +}; + +pp.insertSemicolon = function() { + if (this.canInsertSemicolon()) { + if (this.options.onInsertedSemicolon) + { this.options.onInsertedSemicolon(this.lastTokEnd, this.lastTokEndLoc); } + return true + } +}; + +// Consume a semicolon, or, failing that, see if we are allowed to +// pretend that there is a semicolon at this position. + +pp.semicolon = function() { + if (!this.eat(types.semi) && !this.insertSemicolon()) { this.unexpected(); } +}; + +pp.afterTrailingComma = function(tokType, notNext) { + if (this.type === tokType) { + if (this.options.onTrailingComma) + { this.options.onTrailingComma(this.lastTokStart, this.lastTokStartLoc); } + if (!notNext) + { this.next(); } + return true + } +}; + +// Expect a token of a given type. If found, consume it, otherwise, +// raise an unexpected token error. + +pp.expect = function(type) { + this.eat(type) || this.unexpected(); +}; + +// Raise an unexpected token error. + +pp.unexpected = function(pos) { + this.raise(pos != null ? pos : this.start, "Unexpected token"); +}; + +function DestructuringErrors() { + this.shorthandAssign = + this.trailingComma = + this.parenthesizedAssign = + this.parenthesizedBind = + this.doubleProto = + -1; +} + +pp.checkPatternErrors = function(refDestructuringErrors, isAssign) { + if (!refDestructuringErrors) { return } + if (refDestructuringErrors.trailingComma > -1) + { this.raiseRecoverable(refDestructuringErrors.trailingComma, "Comma is not permitted after the rest element"); } + var parens = isAssign ? refDestructuringErrors.parenthesizedAssign : refDestructuringErrors.parenthesizedBind; + if (parens > -1) { this.raiseRecoverable(parens, "Parenthesized pattern"); } +}; + +pp.checkExpressionErrors = function(refDestructuringErrors, andThrow) { + if (!refDestructuringErrors) { return false } + var shorthandAssign = refDestructuringErrors.shorthandAssign; + var doubleProto = refDestructuringErrors.doubleProto; + if (!andThrow) { return shorthandAssign >= 0 || doubleProto >= 0 } + if (shorthandAssign >= 0) + { this.raise(shorthandAssign, "Shorthand property assignments are valid only in destructuring patterns"); } + if (doubleProto >= 0) + { this.raiseRecoverable(doubleProto, "Redefinition of __proto__ property"); } +}; + +pp.checkYieldAwaitInDefaultParams = function() { + if (this.yieldPos && (!this.awaitPos || this.yieldPos < this.awaitPos)) + { this.raise(this.yieldPos, "Yield expression cannot be a default value"); } + if (this.awaitPos) + { this.raise(this.awaitPos, "Await expression cannot be a default value"); } +}; + +pp.isSimpleAssignTarget = function(expr) { + if (expr.type === "ParenthesizedExpression") + { return this.isSimpleAssignTarget(expr.expression) } + return expr.type === "Identifier" || expr.type === "MemberExpression" +}; + +var pp$1 = Parser.prototype; + +// ### Statement parsing + +// Parse a program. Initializes the parser, reads any number of +// statements, and wraps them in a Program node. Optionally takes a +// `program` argument. If present, the statements will be appended +// to its body instead of creating a new node. + +pp$1.parseTopLevel = function(node) { + var this$1 = this; + + var exports = {}; + if (!node.body) { node.body = []; } + while (this.type !== types.eof) { + var stmt = this$1.parseStatement(true, true, exports); + node.body.push(stmt); + } + this.adaptDirectivePrologue(node.body); + this.next(); + if (this.options.ecmaVersion >= 6) { + node.sourceType = this.options.sourceType; + } + return this.finishNode(node, "Program") +}; + +var loopLabel = {kind: "loop"}; +var switchLabel = {kind: "switch"}; + +pp$1.isLet = function() { + if (this.options.ecmaVersion < 6 || !this.isContextual("let")) { return false } + skipWhiteSpace.lastIndex = this.pos; + var skip = skipWhiteSpace.exec(this.input); + var next = this.pos + skip[0].length, nextCh = this.input.charCodeAt(next); + if (nextCh === 91 || nextCh === 123) { return true } // '{' and '[' + if (isIdentifierStart(nextCh, true)) { + var pos = next + 1; + while (isIdentifierChar(this.input.charCodeAt(pos), true)) { ++pos; } + var ident = this.input.slice(next, pos); + if (!keywordRelationalOperator.test(ident)) { return true } + } + return false +}; + +// check 'async [no LineTerminator here] function' +// - 'async /*foo*/ function' is OK. +// - 'async /*\n*/ function' is invalid. +pp$1.isAsyncFunction = function() { + if (this.options.ecmaVersion < 8 || !this.isContextual("async")) + { return false } + + skipWhiteSpace.lastIndex = this.pos; + var skip = skipWhiteSpace.exec(this.input); + var next = this.pos + skip[0].length; + return !lineBreak.test(this.input.slice(this.pos, next)) && + this.input.slice(next, next + 8) === "function" && + (next + 8 === this.input.length || !isIdentifierChar(this.input.charAt(next + 8))) +}; + +// Parse a single statement. +// +// If expecting a statement and finding a slash operator, parse a +// regular expression literal. This is to handle cases like +// `if (foo) /blah/.exec(foo)`, where looking at the previous token +// does not help. + +pp$1.parseStatement = function(declaration, topLevel, exports) { + var starttype = this.type, node = this.startNode(), kind; + + if (this.isLet()) { + starttype = types._var; + kind = "let"; + } + + // Most types of statements are recognized by the keyword they + // start with. Many are trivial to parse, some require a bit of + // complexity. + + switch (starttype) { + case types._break: case types._continue: return this.parseBreakContinueStatement(node, starttype.keyword) + case types._debugger: return this.parseDebuggerStatement(node) + case types._do: return this.parseDoStatement(node) + case types._for: return this.parseForStatement(node) + case types._function: + if (!declaration && this.options.ecmaVersion >= 6) { this.unexpected(); } + return this.parseFunctionStatement(node, false) + case types._class: + if (!declaration) { this.unexpected(); } + return this.parseClass(node, true) + case types._if: return this.parseIfStatement(node) + case types._return: return this.parseReturnStatement(node) + case types._switch: return this.parseSwitchStatement(node) + case types._throw: return this.parseThrowStatement(node) + case types._try: return this.parseTryStatement(node) + case types._const: case types._var: + kind = kind || this.value; + if (!declaration && kind !== "var") { this.unexpected(); } + return this.parseVarStatement(node, kind) + case types._while: return this.parseWhileStatement(node) + case types._with: return this.parseWithStatement(node) + case types.braceL: return this.parseBlock() + case types.semi: return this.parseEmptyStatement(node) + case types._export: + case types._import: + if (!this.options.allowImportExportEverywhere) { + if (!topLevel) + { this.raise(this.start, "'import' and 'export' may only appear at the top level"); } + if (!this.inModule) + { this.raise(this.start, "'import' and 'export' may appear only with 'sourceType: module'"); } + } + return starttype === types._import ? this.parseImport(node) : this.parseExport(node, exports) + + // If the statement does not start with a statement keyword or a + // brace, it's an ExpressionStatement or LabeledStatement. We + // simply start parsing an expression, and afterwards, if the + // next token is a colon and the expression was a simple + // Identifier node, we switch to interpreting it as a label. + default: + if (this.isAsyncFunction()) { + if (!declaration) { this.unexpected(); } + this.next(); + return this.parseFunctionStatement(node, true) + } + + var maybeName = this.value, expr = this.parseExpression(); + if (starttype === types.name && expr.type === "Identifier" && this.eat(types.colon)) + { return this.parseLabeledStatement(node, maybeName, expr) } + else { return this.parseExpressionStatement(node, expr) } + } +}; + +pp$1.parseBreakContinueStatement = function(node, keyword) { + var this$1 = this; + + var isBreak = keyword === "break"; + this.next(); + if (this.eat(types.semi) || this.insertSemicolon()) { node.label = null; } + else if (this.type !== types.name) { this.unexpected(); } + else { + node.label = this.parseIdent(); + this.semicolon(); + } + + // Verify that there is an actual destination to break or + // continue to. + var i = 0; + for (; i < this.labels.length; ++i) { + var lab = this$1.labels[i]; + if (node.label == null || lab.name === node.label.name) { + if (lab.kind != null && (isBreak || lab.kind === "loop")) { break } + if (node.label && isBreak) { break } + } + } + if (i === this.labels.length) { this.raise(node.start, "Unsyntactic " + keyword); } + return this.finishNode(node, isBreak ? "BreakStatement" : "ContinueStatement") +}; + +pp$1.parseDebuggerStatement = function(node) { + this.next(); + this.semicolon(); + return this.finishNode(node, "DebuggerStatement") +}; + +pp$1.parseDoStatement = function(node) { + this.next(); + this.labels.push(loopLabel); + node.body = this.parseStatement(false); + this.labels.pop(); + this.expect(types._while); + node.test = this.parseParenExpression(); + if (this.options.ecmaVersion >= 6) + { this.eat(types.semi); } + else + { this.semicolon(); } + return this.finishNode(node, "DoWhileStatement") +}; + +// Disambiguating between a `for` and a `for`/`in` or `for`/`of` +// loop is non-trivial. Basically, we have to parse the init `var` +// statement or expression, disallowing the `in` operator (see +// the second parameter to `parseExpression`), and then check +// whether the next token is `in` or `of`. When there is no init +// part (semicolon immediately after the opening parenthesis), it +// is a regular `for` loop. + +pp$1.parseForStatement = function(node) { + this.next(); + var awaitAt = (this.options.ecmaVersion >= 9 && (this.inAsync || (!this.inFunction && this.options.allowAwaitOutsideFunction)) && this.eatContextual("await")) ? this.lastTokStart : -1; + this.labels.push(loopLabel); + this.enterLexicalScope(); + this.expect(types.parenL); + if (this.type === types.semi) { + if (awaitAt > -1) { this.unexpected(awaitAt); } + return this.parseFor(node, null) + } + var isLet = this.isLet(); + if (this.type === types._var || this.type === types._const || isLet) { + var init$1 = this.startNode(), kind = isLet ? "let" : this.value; + this.next(); + this.parseVar(init$1, true, kind); + this.finishNode(init$1, "VariableDeclaration"); + if ((this.type === types._in || (this.options.ecmaVersion >= 6 && this.isContextual("of"))) && init$1.declarations.length === 1 && + !(kind !== "var" && init$1.declarations[0].init)) { + if (this.options.ecmaVersion >= 9) { + if (this.type === types._in) { + if (awaitAt > -1) { this.unexpected(awaitAt); } + } else { node.await = awaitAt > -1; } + } + return this.parseForIn(node, init$1) + } + if (awaitAt > -1) { this.unexpected(awaitAt); } + return this.parseFor(node, init$1) + } + var refDestructuringErrors = new DestructuringErrors; + var init = this.parseExpression(true, refDestructuringErrors); + if (this.type === types._in || (this.options.ecmaVersion >= 6 && this.isContextual("of"))) { + if (this.options.ecmaVersion >= 9) { + if (this.type === types._in) { + if (awaitAt > -1) { this.unexpected(awaitAt); } + } else { node.await = awaitAt > -1; } + } + this.toAssignable(init, false, refDestructuringErrors); + this.checkLVal(init); + return this.parseForIn(node, init) + } else { + this.checkExpressionErrors(refDestructuringErrors, true); + } + if (awaitAt > -1) { this.unexpected(awaitAt); } + return this.parseFor(node, init) +}; + +pp$1.parseFunctionStatement = function(node, isAsync) { + this.next(); + return this.parseFunction(node, true, false, isAsync) +}; + +pp$1.parseIfStatement = function(node) { + this.next(); + node.test = this.parseParenExpression(); + // allow function declarations in branches, but only in non-strict mode + node.consequent = this.parseStatement(!this.strict && this.type === types._function); + node.alternate = this.eat(types._else) ? this.parseStatement(!this.strict && this.type === types._function) : null; + return this.finishNode(node, "IfStatement") +}; + +pp$1.parseReturnStatement = function(node) { + if (!this.inFunction && !this.options.allowReturnOutsideFunction) + { this.raise(this.start, "'return' outside of function"); } + this.next(); + + // In `return` (and `break`/`continue`), the keywords with + // optional arguments, we eagerly look for a semicolon or the + // possibility to insert one. + + if (this.eat(types.semi) || this.insertSemicolon()) { node.argument = null; } + else { node.argument = this.parseExpression(); this.semicolon(); } + return this.finishNode(node, "ReturnStatement") +}; + +pp$1.parseSwitchStatement = function(node) { + var this$1 = this; + + this.next(); + node.discriminant = this.parseParenExpression(); + node.cases = []; + this.expect(types.braceL); + this.labels.push(switchLabel); + this.enterLexicalScope(); + + // Statements under must be grouped (by label) in SwitchCase + // nodes. `cur` is used to keep the node that we are currently + // adding statements to. + + var cur; + for (var sawDefault = false; this.type !== types.braceR;) { + if (this$1.type === types._case || this$1.type === types._default) { + var isCase = this$1.type === types._case; + if (cur) { this$1.finishNode(cur, "SwitchCase"); } + node.cases.push(cur = this$1.startNode()); + cur.consequent = []; + this$1.next(); + if (isCase) { + cur.test = this$1.parseExpression(); + } else { + if (sawDefault) { this$1.raiseRecoverable(this$1.lastTokStart, "Multiple default clauses"); } + sawDefault = true; + cur.test = null; + } + this$1.expect(types.colon); + } else { + if (!cur) { this$1.unexpected(); } + cur.consequent.push(this$1.parseStatement(true)); + } + } + this.exitLexicalScope(); + if (cur) { this.finishNode(cur, "SwitchCase"); } + this.next(); // Closing brace + this.labels.pop(); + return this.finishNode(node, "SwitchStatement") +}; + +pp$1.parseThrowStatement = function(node) { + this.next(); + if (lineBreak.test(this.input.slice(this.lastTokEnd, this.start))) + { this.raise(this.lastTokEnd, "Illegal newline after throw"); } + node.argument = this.parseExpression(); + this.semicolon(); + return this.finishNode(node, "ThrowStatement") +}; + +// Reused empty array added for node fields that are always empty. + +var empty = []; + +pp$1.parseTryStatement = function(node) { + this.next(); + node.block = this.parseBlock(); + node.handler = null; + if (this.type === types._catch) { + var clause = this.startNode(); + this.next(); + if (this.eat(types.parenL)) { + clause.param = this.parseBindingAtom(); + this.enterLexicalScope(); + this.checkLVal(clause.param, "let"); + this.expect(types.parenR); + } else { + if (this.options.ecmaVersion < 10) { this.unexpected(); } + clause.param = null; + this.enterLexicalScope(); + } + clause.body = this.parseBlock(false); + this.exitLexicalScope(); + node.handler = this.finishNode(clause, "CatchClause"); + } + node.finalizer = this.eat(types._finally) ? this.parseBlock() : null; + if (!node.handler && !node.finalizer) + { this.raise(node.start, "Missing catch or finally clause"); } + return this.finishNode(node, "TryStatement") +}; + +pp$1.parseVarStatement = function(node, kind) { + this.next(); + this.parseVar(node, false, kind); + this.semicolon(); + return this.finishNode(node, "VariableDeclaration") +}; + +pp$1.parseWhileStatement = function(node) { + this.next(); + node.test = this.parseParenExpression(); + this.labels.push(loopLabel); + node.body = this.parseStatement(false); + this.labels.pop(); + return this.finishNode(node, "WhileStatement") +}; + +pp$1.parseWithStatement = function(node) { + if (this.strict) { this.raise(this.start, "'with' in strict mode"); } + this.next(); + node.object = this.parseParenExpression(); + node.body = this.parseStatement(false); + return this.finishNode(node, "WithStatement") +}; + +pp$1.parseEmptyStatement = function(node) { + this.next(); + return this.finishNode(node, "EmptyStatement") +}; + +pp$1.parseLabeledStatement = function(node, maybeName, expr) { + var this$1 = this; + + for (var i$1 = 0, list = this$1.labels; i$1 < list.length; i$1 += 1) + { + var label = list[i$1]; + + if (label.name === maybeName) + { this$1.raise(expr.start, "Label '" + maybeName + "' is already declared"); + } } + var kind = this.type.isLoop ? "loop" : this.type === types._switch ? "switch" : null; + for (var i = this.labels.length - 1; i >= 0; i--) { + var label$1 = this$1.labels[i]; + if (label$1.statementStart === node.start) { + // Update information about previous labels on this node + label$1.statementStart = this$1.start; + label$1.kind = kind; + } else { break } + } + this.labels.push({name: maybeName, kind: kind, statementStart: this.start}); + node.body = this.parseStatement(true); + if (node.body.type === "ClassDeclaration" || + node.body.type === "VariableDeclaration" && node.body.kind !== "var" || + node.body.type === "FunctionDeclaration" && (this.strict || node.body.generator || node.body.async)) + { this.raiseRecoverable(node.body.start, "Invalid labeled declaration"); } + this.labels.pop(); + node.label = expr; + return this.finishNode(node, "LabeledStatement") +}; + +pp$1.parseExpressionStatement = function(node, expr) { + node.expression = expr; + this.semicolon(); + return this.finishNode(node, "ExpressionStatement") +}; + +// Parse a semicolon-enclosed block of statements, handling `"use +// strict"` declarations when `allowStrict` is true (used for +// function bodies). + +pp$1.parseBlock = function(createNewLexicalScope) { + var this$1 = this; + if ( createNewLexicalScope === void 0 ) createNewLexicalScope = true; + + var node = this.startNode(); + node.body = []; + this.expect(types.braceL); + if (createNewLexicalScope) { + this.enterLexicalScope(); + } + while (!this.eat(types.braceR)) { + var stmt = this$1.parseStatement(true); + node.body.push(stmt); + } + if (createNewLexicalScope) { + this.exitLexicalScope(); + } + return this.finishNode(node, "BlockStatement") +}; + +// Parse a regular `for` loop. The disambiguation code in +// `parseStatement` will already have parsed the init statement or +// expression. + +pp$1.parseFor = function(node, init) { + node.init = init; + this.expect(types.semi); + node.test = this.type === types.semi ? null : this.parseExpression(); + this.expect(types.semi); + node.update = this.type === types.parenR ? null : this.parseExpression(); + this.expect(types.parenR); + this.exitLexicalScope(); + node.body = this.parseStatement(false); + this.labels.pop(); + return this.finishNode(node, "ForStatement") +}; + +// Parse a `for`/`in` and `for`/`of` loop, which are almost +// same from parser's perspective. + +pp$1.parseForIn = function(node, init) { + var type = this.type === types._in ? "ForInStatement" : "ForOfStatement"; + this.next(); + if (type === "ForInStatement") { + if (init.type === "AssignmentPattern" || + (init.type === "VariableDeclaration" && init.declarations[0].init != null && + (this.strict || init.declarations[0].id.type !== "Identifier"))) + { this.raise(init.start, "Invalid assignment in for-in loop head"); } + } + node.left = init; + node.right = type === "ForInStatement" ? this.parseExpression() : this.parseMaybeAssign(); + this.expect(types.parenR); + this.exitLexicalScope(); + node.body = this.parseStatement(false); + this.labels.pop(); + return this.finishNode(node, type) +}; + +// Parse a list of variable declarations. + +pp$1.parseVar = function(node, isFor, kind) { + var this$1 = this; + + node.declarations = []; + node.kind = kind; + for (;;) { + var decl = this$1.startNode(); + this$1.parseVarId(decl, kind); + if (this$1.eat(types.eq)) { + decl.init = this$1.parseMaybeAssign(isFor); + } else if (kind === "const" && !(this$1.type === types._in || (this$1.options.ecmaVersion >= 6 && this$1.isContextual("of")))) { + this$1.unexpected(); + } else if (decl.id.type !== "Identifier" && !(isFor && (this$1.type === types._in || this$1.isContextual("of")))) { + this$1.raise(this$1.lastTokEnd, "Complex binding patterns require an initialization value"); + } else { + decl.init = null; + } + node.declarations.push(this$1.finishNode(decl, "VariableDeclarator")); + if (!this$1.eat(types.comma)) { break } + } + return node +}; + +pp$1.parseVarId = function(decl, kind) { + decl.id = this.parseBindingAtom(kind); + this.checkLVal(decl.id, kind, false); +}; + +// Parse a function declaration or literal (depending on the +// `isStatement` parameter). + +pp$1.parseFunction = function(node, isStatement, allowExpressionBody, isAsync) { + this.initFunction(node); + if (this.options.ecmaVersion >= 9 || this.options.ecmaVersion >= 6 && !isAsync) + { node.generator = this.eat(types.star); } + if (this.options.ecmaVersion >= 8) + { node.async = !!isAsync; } + + if (isStatement) { + node.id = isStatement === "nullableID" && this.type !== types.name ? null : this.parseIdent(); + if (node.id) { + this.checkLVal(node.id, this.inModule && !this.inFunction ? "let" : "var"); + } + } + + var oldInGen = this.inGenerator, oldInAsync = this.inAsync, + oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldInFunc = this.inFunction; + this.inGenerator = node.generator; + this.inAsync = node.async; + this.yieldPos = 0; + this.awaitPos = 0; + this.inFunction = true; + this.enterFunctionScope(); + + if (!isStatement) + { node.id = this.type === types.name ? this.parseIdent() : null; } + + this.parseFunctionParams(node); + this.parseFunctionBody(node, allowExpressionBody); + + this.inGenerator = oldInGen; + this.inAsync = oldInAsync; + this.yieldPos = oldYieldPos; + this.awaitPos = oldAwaitPos; + this.inFunction = oldInFunc; + return this.finishNode(node, isStatement ? "FunctionDeclaration" : "FunctionExpression") +}; + +pp$1.parseFunctionParams = function(node) { + this.expect(types.parenL); + node.params = this.parseBindingList(types.parenR, false, this.options.ecmaVersion >= 8); + this.checkYieldAwaitInDefaultParams(); +}; + +// Parse a class declaration or literal (depending on the +// `isStatement` parameter). + +pp$1.parseClass = function(node, isStatement) { + var this$1 = this; + + this.next(); + + this.parseClassId(node, isStatement); + this.parseClassSuper(node); + var classBody = this.startNode(); + var hadConstructor = false; + classBody.body = []; + this.expect(types.braceL); + while (!this.eat(types.braceR)) { + var member = this$1.parseClassMember(classBody); + if (member && member.type === "MethodDefinition" && member.kind === "constructor") { + if (hadConstructor) { this$1.raise(member.start, "Duplicate constructor in the same class"); } + hadConstructor = true; + } + } + node.body = this.finishNode(classBody, "ClassBody"); + return this.finishNode(node, isStatement ? "ClassDeclaration" : "ClassExpression") +}; + +pp$1.parseClassMember = function(classBody) { + var this$1 = this; + + if (this.eat(types.semi)) { return null } + + var method = this.startNode(); + var tryContextual = function (k, noLineBreak) { + if ( noLineBreak === void 0 ) noLineBreak = false; + + var start = this$1.start, startLoc = this$1.startLoc; + if (!this$1.eatContextual(k)) { return false } + if (this$1.type !== types.parenL && (!noLineBreak || !this$1.canInsertSemicolon())) { return true } + if (method.key) { this$1.unexpected(); } + method.computed = false; + method.key = this$1.startNodeAt(start, startLoc); + method.key.name = k; + this$1.finishNode(method.key, "Identifier"); + return false + }; + + method.kind = "method"; + method.static = tryContextual("static"); + var isGenerator = this.eat(types.star); + var isAsync = false; + if (!isGenerator) { + if (this.options.ecmaVersion >= 8 && tryContextual("async", true)) { + isAsync = true; + isGenerator = this.options.ecmaVersion >= 9 && this.eat(types.star); + } else if (tryContextual("get")) { + method.kind = "get"; + } else if (tryContextual("set")) { + method.kind = "set"; + } + } + if (!method.key) { this.parsePropertyName(method); } + var key = method.key; + if (!method.computed && !method.static && (key.type === "Identifier" && key.name === "constructor" || + key.type === "Literal" && key.value === "constructor")) { + if (method.kind !== "method") { this.raise(key.start, "Constructor can't have get/set modifier"); } + if (isGenerator) { this.raise(key.start, "Constructor can't be a generator"); } + if (isAsync) { this.raise(key.start, "Constructor can't be an async method"); } + method.kind = "constructor"; + } else if (method.static && key.type === "Identifier" && key.name === "prototype") { + this.raise(key.start, "Classes may not have a static property named prototype"); + } + this.parseClassMethod(classBody, method, isGenerator, isAsync); + if (method.kind === "get" && method.value.params.length !== 0) + { this.raiseRecoverable(method.value.start, "getter should have no params"); } + if (method.kind === "set" && method.value.params.length !== 1) + { this.raiseRecoverable(method.value.start, "setter should have exactly one param"); } + if (method.kind === "set" && method.value.params[0].type === "RestElement") + { this.raiseRecoverable(method.value.params[0].start, "Setter cannot use rest params"); } + return method +}; + +pp$1.parseClassMethod = function(classBody, method, isGenerator, isAsync) { + method.value = this.parseMethod(isGenerator, isAsync); + classBody.body.push(this.finishNode(method, "MethodDefinition")); +}; + +pp$1.parseClassId = function(node, isStatement) { + node.id = this.type === types.name ? this.parseIdent() : isStatement === true ? this.unexpected() : null; +}; + +pp$1.parseClassSuper = function(node) { + node.superClass = this.eat(types._extends) ? this.parseExprSubscripts() : null; +}; + +// Parses module export declaration. + +pp$1.parseExport = function(node, exports) { + var this$1 = this; + + this.next(); + // export * from '...' + if (this.eat(types.star)) { + this.expectContextual("from"); + if (this.type !== types.string) { this.unexpected(); } + node.source = this.parseExprAtom(); + this.semicolon(); + return this.finishNode(node, "ExportAllDeclaration") + } + if (this.eat(types._default)) { // export default ... + this.checkExport(exports, "default", this.lastTokStart); + var isAsync; + if (this.type === types._function || (isAsync = this.isAsyncFunction())) { + var fNode = this.startNode(); + this.next(); + if (isAsync) { this.next(); } + node.declaration = this.parseFunction(fNode, "nullableID", false, isAsync); + } else if (this.type === types._class) { + var cNode = this.startNode(); + node.declaration = this.parseClass(cNode, "nullableID"); + } else { + node.declaration = this.parseMaybeAssign(); + this.semicolon(); + } + return this.finishNode(node, "ExportDefaultDeclaration") + } + // export var|const|let|function|class ... + if (this.shouldParseExportStatement()) { + node.declaration = this.parseStatement(true); + if (node.declaration.type === "VariableDeclaration") + { this.checkVariableExport(exports, node.declaration.declarations); } + else + { this.checkExport(exports, node.declaration.id.name, node.declaration.id.start); } + node.specifiers = []; + node.source = null; + } else { // export { x, y as z } [from '...'] + node.declaration = null; + node.specifiers = this.parseExportSpecifiers(exports); + if (this.eatContextual("from")) { + if (this.type !== types.string) { this.unexpected(); } + node.source = this.parseExprAtom(); + } else { + // check for keywords used as local names + for (var i = 0, list = node.specifiers; i < list.length; i += 1) { + var spec = list[i]; + + this$1.checkUnreserved(spec.local); + } + + node.source = null; + } + this.semicolon(); + } + return this.finishNode(node, "ExportNamedDeclaration") +}; + +pp$1.checkExport = function(exports, name, pos) { + if (!exports) { return } + if (has(exports, name)) + { this.raiseRecoverable(pos, "Duplicate export '" + name + "'"); } + exports[name] = true; +}; + +pp$1.checkPatternExport = function(exports, pat) { + var this$1 = this; + + var type = pat.type; + if (type === "Identifier") + { this.checkExport(exports, pat.name, pat.start); } + else if (type === "ObjectPattern") + { for (var i = 0, list = pat.properties; i < list.length; i += 1) + { + var prop = list[i]; + + this$1.checkPatternExport(exports, prop); + } } + else if (type === "ArrayPattern") + { for (var i$1 = 0, list$1 = pat.elements; i$1 < list$1.length; i$1 += 1) { + var elt = list$1[i$1]; + + if (elt) { this$1.checkPatternExport(exports, elt); } + } } + else if (type === "Property") + { this.checkPatternExport(exports, pat.value); } + else if (type === "AssignmentPattern") + { this.checkPatternExport(exports, pat.left); } + else if (type === "RestElement") + { this.checkPatternExport(exports, pat.argument); } + else if (type === "ParenthesizedExpression") + { this.checkPatternExport(exports, pat.expression); } +}; + +pp$1.checkVariableExport = function(exports, decls) { + var this$1 = this; + + if (!exports) { return } + for (var i = 0, list = decls; i < list.length; i += 1) + { + var decl = list[i]; + + this$1.checkPatternExport(exports, decl.id); + } +}; + +pp$1.shouldParseExportStatement = function() { + return this.type.keyword === "var" || + this.type.keyword === "const" || + this.type.keyword === "class" || + this.type.keyword === "function" || + this.isLet() || + this.isAsyncFunction() +}; + +// Parses a comma-separated list of module exports. + +pp$1.parseExportSpecifiers = function(exports) { + var this$1 = this; + + var nodes = [], first = true; + // export { x, y as z } [from '...'] + this.expect(types.braceL); + while (!this.eat(types.braceR)) { + if (!first) { + this$1.expect(types.comma); + if (this$1.afterTrailingComma(types.braceR)) { break } + } else { first = false; } + + var node = this$1.startNode(); + node.local = this$1.parseIdent(true); + node.exported = this$1.eatContextual("as") ? this$1.parseIdent(true) : node.local; + this$1.checkExport(exports, node.exported.name, node.exported.start); + nodes.push(this$1.finishNode(node, "ExportSpecifier")); + } + return nodes +}; + +// Parses import declaration. + +pp$1.parseImport = function(node) { + this.next(); + // import '...' + if (this.type === types.string) { + node.specifiers = empty; + node.source = this.parseExprAtom(); + } else { + node.specifiers = this.parseImportSpecifiers(); + this.expectContextual("from"); + node.source = this.type === types.string ? this.parseExprAtom() : this.unexpected(); + } + this.semicolon(); + return this.finishNode(node, "ImportDeclaration") +}; + +// Parses a comma-separated list of module imports. + +pp$1.parseImportSpecifiers = function() { + var this$1 = this; + + var nodes = [], first = true; + if (this.type === types.name) { + // import defaultObj, { x, y as z } from '...' + var node = this.startNode(); + node.local = this.parseIdent(); + this.checkLVal(node.local, "let"); + nodes.push(this.finishNode(node, "ImportDefaultSpecifier")); + if (!this.eat(types.comma)) { return nodes } + } + if (this.type === types.star) { + var node$1 = this.startNode(); + this.next(); + this.expectContextual("as"); + node$1.local = this.parseIdent(); + this.checkLVal(node$1.local, "let"); + nodes.push(this.finishNode(node$1, "ImportNamespaceSpecifier")); + return nodes + } + this.expect(types.braceL); + while (!this.eat(types.braceR)) { + if (!first) { + this$1.expect(types.comma); + if (this$1.afterTrailingComma(types.braceR)) { break } + } else { first = false; } + + var node$2 = this$1.startNode(); + node$2.imported = this$1.parseIdent(true); + if (this$1.eatContextual("as")) { + node$2.local = this$1.parseIdent(); + } else { + this$1.checkUnreserved(node$2.imported); + node$2.local = node$2.imported; + } + this$1.checkLVal(node$2.local, "let"); + nodes.push(this$1.finishNode(node$2, "ImportSpecifier")); + } + return nodes +}; + +// Set `ExpressionStatement#directive` property for directive prologues. +pp$1.adaptDirectivePrologue = function(statements) { + for (var i = 0; i < statements.length && this.isDirectiveCandidate(statements[i]); ++i) { + statements[i].directive = statements[i].expression.raw.slice(1, -1); + } +}; +pp$1.isDirectiveCandidate = function(statement) { + return ( + statement.type === "ExpressionStatement" && + statement.expression.type === "Literal" && + typeof statement.expression.value === "string" && + // Reject parenthesized strings. + (this.input[statement.start] === "\"" || this.input[statement.start] === "'") + ) +}; + +var pp$2 = Parser.prototype; + +// Convert existing expression atom to assignable pattern +// if possible. + +pp$2.toAssignable = function(node, isBinding, refDestructuringErrors) { + var this$1 = this; + + if (this.options.ecmaVersion >= 6 && node) { + switch (node.type) { + case "Identifier": + if (this.inAsync && node.name === "await") + { this.raise(node.start, "Can not use 'await' as identifier inside an async function"); } + break + + case "ObjectPattern": + case "ArrayPattern": + case "RestElement": + break + + case "ObjectExpression": + node.type = "ObjectPattern"; + if (refDestructuringErrors) { this.checkPatternErrors(refDestructuringErrors, true); } + for (var i = 0, list = node.properties; i < list.length; i += 1) { + var prop = list[i]; + + this$1.toAssignable(prop, isBinding); + // Early error: + // AssignmentRestProperty[Yield, Await] : + // `...` DestructuringAssignmentTarget[Yield, Await] + // + // It is a Syntax Error if |DestructuringAssignmentTarget| is an |ArrayLiteral| or an |ObjectLiteral|. + if ( + prop.type === "RestElement" && + (prop.argument.type === "ArrayPattern" || prop.argument.type === "ObjectPattern") + ) { + this$1.raise(prop.argument.start, "Unexpected token"); + } + } + break + + case "Property": + // AssignmentProperty has type === "Property" + if (node.kind !== "init") { this.raise(node.key.start, "Object pattern can't contain getter or setter"); } + this.toAssignable(node.value, isBinding); + break + + case "ArrayExpression": + node.type = "ArrayPattern"; + if (refDestructuringErrors) { this.checkPatternErrors(refDestructuringErrors, true); } + this.toAssignableList(node.elements, isBinding); + break + + case "SpreadElement": + node.type = "RestElement"; + this.toAssignable(node.argument, isBinding); + if (node.argument.type === "AssignmentPattern") + { this.raise(node.argument.start, "Rest elements cannot have a default value"); } + break + + case "AssignmentExpression": + if (node.operator !== "=") { this.raise(node.left.end, "Only '=' operator can be used for specifying default value."); } + node.type = "AssignmentPattern"; + delete node.operator; + this.toAssignable(node.left, isBinding); + // falls through to AssignmentPattern + + case "AssignmentPattern": + break + + case "ParenthesizedExpression": + this.toAssignable(node.expression, isBinding); + break + + case "MemberExpression": + if (!isBinding) { break } + + default: + this.raise(node.start, "Assigning to rvalue"); + } + } else if (refDestructuringErrors) { this.checkPatternErrors(refDestructuringErrors, true); } + return node +}; + +// Convert list of expression atoms to binding list. + +pp$2.toAssignableList = function(exprList, isBinding) { + var this$1 = this; + + var end = exprList.length; + for (var i = 0; i < end; i++) { + var elt = exprList[i]; + if (elt) { this$1.toAssignable(elt, isBinding); } + } + if (end) { + var last = exprList[end - 1]; + if (this.options.ecmaVersion === 6 && isBinding && last && last.type === "RestElement" && last.argument.type !== "Identifier") + { this.unexpected(last.argument.start); } + } + return exprList +}; + +// Parses spread element. + +pp$2.parseSpread = function(refDestructuringErrors) { + var node = this.startNode(); + this.next(); + node.argument = this.parseMaybeAssign(false, refDestructuringErrors); + return this.finishNode(node, "SpreadElement") +}; + +pp$2.parseRestBinding = function() { + var node = this.startNode(); + this.next(); + + // RestElement inside of a function parameter must be an identifier + if (this.options.ecmaVersion === 6 && this.type !== types.name) + { this.unexpected(); } + + node.argument = this.parseBindingAtom(); + + return this.finishNode(node, "RestElement") +}; + +// Parses lvalue (assignable) atom. + +pp$2.parseBindingAtom = function() { + if (this.options.ecmaVersion >= 6) { + switch (this.type) { + case types.bracketL: + var node = this.startNode(); + this.next(); + node.elements = this.parseBindingList(types.bracketR, true, true); + return this.finishNode(node, "ArrayPattern") + + case types.braceL: + return this.parseObj(true) + } + } + return this.parseIdent() +}; + +pp$2.parseBindingList = function(close, allowEmpty, allowTrailingComma) { + var this$1 = this; + + var elts = [], first = true; + while (!this.eat(close)) { + if (first) { first = false; } + else { this$1.expect(types.comma); } + if (allowEmpty && this$1.type === types.comma) { + elts.push(null); + } else if (allowTrailingComma && this$1.afterTrailingComma(close)) { + break + } else if (this$1.type === types.ellipsis) { + var rest = this$1.parseRestBinding(); + this$1.parseBindingListItem(rest); + elts.push(rest); + if (this$1.type === types.comma) { this$1.raise(this$1.start, "Comma is not permitted after the rest element"); } + this$1.expect(close); + break + } else { + var elem = this$1.parseMaybeDefault(this$1.start, this$1.startLoc); + this$1.parseBindingListItem(elem); + elts.push(elem); + } + } + return elts +}; + +pp$2.parseBindingListItem = function(param) { + return param +}; + +// Parses assignment pattern around given atom if possible. + +pp$2.parseMaybeDefault = function(startPos, startLoc, left) { + left = left || this.parseBindingAtom(); + if (this.options.ecmaVersion < 6 || !this.eat(types.eq)) { return left } + var node = this.startNodeAt(startPos, startLoc); + node.left = left; + node.right = this.parseMaybeAssign(); + return this.finishNode(node, "AssignmentPattern") +}; + +// Verify that a node is an lval — something that can be assigned +// to. +// bindingType can be either: +// 'var' indicating that the lval creates a 'var' binding +// 'let' indicating that the lval creates a lexical ('let' or 'const') binding +// 'none' indicating that the binding should be checked for illegal identifiers, but not for duplicate references + +pp$2.checkLVal = function(expr, bindingType, checkClashes) { + var this$1 = this; + + switch (expr.type) { + case "Identifier": + if (this.strict && this.reservedWordsStrictBind.test(expr.name)) + { this.raiseRecoverable(expr.start, (bindingType ? "Binding " : "Assigning to ") + expr.name + " in strict mode"); } + if (checkClashes) { + if (has(checkClashes, expr.name)) + { this.raiseRecoverable(expr.start, "Argument name clash"); } + checkClashes[expr.name] = true; + } + if (bindingType && bindingType !== "none") { + if ( + bindingType === "var" && !this.canDeclareVarName(expr.name) || + bindingType !== "var" && !this.canDeclareLexicalName(expr.name) + ) { + this.raiseRecoverable(expr.start, ("Identifier '" + (expr.name) + "' has already been declared")); + } + if (bindingType === "var") { + this.declareVarName(expr.name); + } else { + this.declareLexicalName(expr.name); + } + } + break + + case "MemberExpression": + if (bindingType) { this.raiseRecoverable(expr.start, "Binding member expression"); } + break + + case "ObjectPattern": + for (var i = 0, list = expr.properties; i < list.length; i += 1) + { + var prop = list[i]; + + this$1.checkLVal(prop, bindingType, checkClashes); + } + break + + case "Property": + // AssignmentProperty has type === "Property" + this.checkLVal(expr.value, bindingType, checkClashes); + break + + case "ArrayPattern": + for (var i$1 = 0, list$1 = expr.elements; i$1 < list$1.length; i$1 += 1) { + var elem = list$1[i$1]; + + if (elem) { this$1.checkLVal(elem, bindingType, checkClashes); } + } + break + + case "AssignmentPattern": + this.checkLVal(expr.left, bindingType, checkClashes); + break + + case "RestElement": + this.checkLVal(expr.argument, bindingType, checkClashes); + break + + case "ParenthesizedExpression": + this.checkLVal(expr.expression, bindingType, checkClashes); + break + + default: + this.raise(expr.start, (bindingType ? "Binding" : "Assigning to") + " rvalue"); + } +}; + +// A recursive descent parser operates by defining functions for all +// syntactic elements, and recursively calling those, each function +// advancing the input stream and returning an AST node. Precedence +// of constructs (for example, the fact that `!x[1]` means `!(x[1])` +// instead of `(!x)[1]` is handled by the fact that the parser +// function that parses unary prefix operators is called first, and +// in turn calls the function that parses `[]` subscripts — that +// way, it'll receive the node for `x[1]` already parsed, and wraps +// *that* in the unary operator node. +// +// Acorn uses an [operator precedence parser][opp] to handle binary +// operator precedence, because it is much more compact than using +// the technique outlined above, which uses different, nesting +// functions to specify precedence, for all of the ten binary +// precedence levels that JavaScript defines. +// +// [opp]: http://en.wikipedia.org/wiki/Operator-precedence_parser + +var pp$3 = Parser.prototype; + +// Check if property name clashes with already added. +// Object/class getters and setters are not allowed to clash — +// either with each other or with an init property — and in +// strict mode, init properties are also not allowed to be repeated. + +pp$3.checkPropClash = function(prop, propHash, refDestructuringErrors) { + if (this.options.ecmaVersion >= 9 && prop.type === "SpreadElement") + { return } + if (this.options.ecmaVersion >= 6 && (prop.computed || prop.method || prop.shorthand)) + { return } + var key = prop.key; + var name; + switch (key.type) { + case "Identifier": name = key.name; break + case "Literal": name = String(key.value); break + default: return + } + var kind = prop.kind; + if (this.options.ecmaVersion >= 6) { + if (name === "__proto__" && kind === "init") { + if (propHash.proto) { + if (refDestructuringErrors && refDestructuringErrors.doubleProto < 0) { refDestructuringErrors.doubleProto = key.start; } + // Backwards-compat kludge. Can be removed in version 6.0 + else { this.raiseRecoverable(key.start, "Redefinition of __proto__ property"); } + } + propHash.proto = true; + } + return + } + name = "$" + name; + var other = propHash[name]; + if (other) { + var redefinition; + if (kind === "init") { + redefinition = this.strict && other.init || other.get || other.set; + } else { + redefinition = other.init || other[kind]; + } + if (redefinition) + { this.raiseRecoverable(key.start, "Redefinition of property"); } + } else { + other = propHash[name] = { + init: false, + get: false, + set: false + }; + } + other[kind] = true; +}; + +// ### Expression parsing + +// These nest, from the most general expression type at the top to +// 'atomic', nondivisible expression types at the bottom. Most of +// the functions will simply let the function(s) below them parse, +// and, *if* the syntactic construct they handle is present, wrap +// the AST node that the inner parser gave them in another node. + +// Parse a full expression. The optional arguments are used to +// forbid the `in` operator (in for loops initalization expressions) +// and provide reference for storing '=' operator inside shorthand +// property assignment in contexts where both object expression +// and object pattern might appear (so it's possible to raise +// delayed syntax error at correct position). + +pp$3.parseExpression = function(noIn, refDestructuringErrors) { + var this$1 = this; + + var startPos = this.start, startLoc = this.startLoc; + var expr = this.parseMaybeAssign(noIn, refDestructuringErrors); + if (this.type === types.comma) { + var node = this.startNodeAt(startPos, startLoc); + node.expressions = [expr]; + while (this.eat(types.comma)) { node.expressions.push(this$1.parseMaybeAssign(noIn, refDestructuringErrors)); } + return this.finishNode(node, "SequenceExpression") + } + return expr +}; + +// Parse an assignment expression. This includes applications of +// operators like `+=`. + +pp$3.parseMaybeAssign = function(noIn, refDestructuringErrors, afterLeftParse) { + if (this.inGenerator && this.isContextual("yield")) { return this.parseYield() } + + var ownDestructuringErrors = false, oldParenAssign = -1, oldTrailingComma = -1; + if (refDestructuringErrors) { + oldParenAssign = refDestructuringErrors.parenthesizedAssign; + oldTrailingComma = refDestructuringErrors.trailingComma; + refDestructuringErrors.parenthesizedAssign = refDestructuringErrors.trailingComma = -1; + } else { + refDestructuringErrors = new DestructuringErrors; + ownDestructuringErrors = true; + } + + var startPos = this.start, startLoc = this.startLoc; + if (this.type === types.parenL || this.type === types.name) + { this.potentialArrowAt = this.start; } + var left = this.parseMaybeConditional(noIn, refDestructuringErrors); + if (afterLeftParse) { left = afterLeftParse.call(this, left, startPos, startLoc); } + if (this.type.isAssign) { + var node = this.startNodeAt(startPos, startLoc); + node.operator = this.value; + node.left = this.type === types.eq ? this.toAssignable(left, false, refDestructuringErrors) : left; + if (!ownDestructuringErrors) { DestructuringErrors.call(refDestructuringErrors); } + refDestructuringErrors.shorthandAssign = -1; // reset because shorthand default was used correctly + this.checkLVal(left); + this.next(); + node.right = this.parseMaybeAssign(noIn); + return this.finishNode(node, "AssignmentExpression") + } else { + if (ownDestructuringErrors) { this.checkExpressionErrors(refDestructuringErrors, true); } + } + if (oldParenAssign > -1) { refDestructuringErrors.parenthesizedAssign = oldParenAssign; } + if (oldTrailingComma > -1) { refDestructuringErrors.trailingComma = oldTrailingComma; } + return left +}; + +// Parse a ternary conditional (`?:`) operator. + +pp$3.parseMaybeConditional = function(noIn, refDestructuringErrors) { + var startPos = this.start, startLoc = this.startLoc; + var expr = this.parseExprOps(noIn, refDestructuringErrors); + if (this.checkExpressionErrors(refDestructuringErrors)) { return expr } + if (this.eat(types.question)) { + var node = this.startNodeAt(startPos, startLoc); + node.test = expr; + node.consequent = this.parseMaybeAssign(); + this.expect(types.colon); + node.alternate = this.parseMaybeAssign(noIn); + return this.finishNode(node, "ConditionalExpression") + } + return expr +}; + +// Start the precedence parser. + +pp$3.parseExprOps = function(noIn, refDestructuringErrors) { + var startPos = this.start, startLoc = this.startLoc; + var expr = this.parseMaybeUnary(refDestructuringErrors, false); + if (this.checkExpressionErrors(refDestructuringErrors)) { return expr } + return expr.start === startPos && expr.type === "ArrowFunctionExpression" ? expr : this.parseExprOp(expr, startPos, startLoc, -1, noIn) +}; + +// Parse binary operators with the operator precedence parsing +// algorithm. `left` is the left-hand side of the operator. +// `minPrec` provides context that allows the function to stop and +// defer further parser to one of its callers when it encounters an +// operator that has a lower precedence than the set it is parsing. + +pp$3.parseExprOp = function(left, leftStartPos, leftStartLoc, minPrec, noIn) { + var prec = this.type.binop; + if (prec != null && (!noIn || this.type !== types._in)) { + if (prec > minPrec) { + var logical = this.type === types.logicalOR || this.type === types.logicalAND; + var op = this.value; + this.next(); + var startPos = this.start, startLoc = this.startLoc; + var right = this.parseExprOp(this.parseMaybeUnary(null, false), startPos, startLoc, prec, noIn); + var node = this.buildBinary(leftStartPos, leftStartLoc, left, right, op, logical); + return this.parseExprOp(node, leftStartPos, leftStartLoc, minPrec, noIn) + } + } + return left +}; + +pp$3.buildBinary = function(startPos, startLoc, left, right, op, logical) { + var node = this.startNodeAt(startPos, startLoc); + node.left = left; + node.operator = op; + node.right = right; + return this.finishNode(node, logical ? "LogicalExpression" : "BinaryExpression") +}; + +// Parse unary operators, both prefix and postfix. + +pp$3.parseMaybeUnary = function(refDestructuringErrors, sawUnary) { + var this$1 = this; + + var startPos = this.start, startLoc = this.startLoc, expr; + if (this.isContextual("await") && (this.inAsync || (!this.inFunction && this.options.allowAwaitOutsideFunction))) { + expr = this.parseAwait(); + sawUnary = true; + } else if (this.type.prefix) { + var node = this.startNode(), update = this.type === types.incDec; + node.operator = this.value; + node.prefix = true; + this.next(); + node.argument = this.parseMaybeUnary(null, true); + this.checkExpressionErrors(refDestructuringErrors, true); + if (update) { this.checkLVal(node.argument); } + else if (this.strict && node.operator === "delete" && + node.argument.type === "Identifier") + { this.raiseRecoverable(node.start, "Deleting local variable in strict mode"); } + else { sawUnary = true; } + expr = this.finishNode(node, update ? "UpdateExpression" : "UnaryExpression"); + } else { + expr = this.parseExprSubscripts(refDestructuringErrors); + if (this.checkExpressionErrors(refDestructuringErrors)) { return expr } + while (this.type.postfix && !this.canInsertSemicolon()) { + var node$1 = this$1.startNodeAt(startPos, startLoc); + node$1.operator = this$1.value; + node$1.prefix = false; + node$1.argument = expr; + this$1.checkLVal(expr); + this$1.next(); + expr = this$1.finishNode(node$1, "UpdateExpression"); + } + } + + if (!sawUnary && this.eat(types.starstar)) + { return this.buildBinary(startPos, startLoc, expr, this.parseMaybeUnary(null, false), "**", false) } + else + { return expr } +}; + +// Parse call, dot, and `[]`-subscript expressions. + +pp$3.parseExprSubscripts = function(refDestructuringErrors) { + var startPos = this.start, startLoc = this.startLoc; + var expr = this.parseExprAtom(refDestructuringErrors); + var skipArrowSubscripts = expr.type === "ArrowFunctionExpression" && this.input.slice(this.lastTokStart, this.lastTokEnd) !== ")"; + if (this.checkExpressionErrors(refDestructuringErrors) || skipArrowSubscripts) { return expr } + var result = this.parseSubscripts(expr, startPos, startLoc); + if (refDestructuringErrors && result.type === "MemberExpression") { + if (refDestructuringErrors.parenthesizedAssign >= result.start) { refDestructuringErrors.parenthesizedAssign = -1; } + if (refDestructuringErrors.parenthesizedBind >= result.start) { refDestructuringErrors.parenthesizedBind = -1; } + } + return result +}; + +pp$3.parseSubscripts = function(base, startPos, startLoc, noCalls) { + var this$1 = this; + + var maybeAsyncArrow = this.options.ecmaVersion >= 8 && base.type === "Identifier" && base.name === "async" && + this.lastTokEnd === base.end && !this.canInsertSemicolon() && this.input.slice(base.start, base.end) === "async"; + for (var computed = (void 0);;) { + if ((computed = this$1.eat(types.bracketL)) || this$1.eat(types.dot)) { + var node = this$1.startNodeAt(startPos, startLoc); + node.object = base; + node.property = computed ? this$1.parseExpression() : this$1.parseIdent(true); + node.computed = !!computed; + if (computed) { this$1.expect(types.bracketR); } + base = this$1.finishNode(node, "MemberExpression"); + } else if (!noCalls && this$1.eat(types.parenL)) { + var refDestructuringErrors = new DestructuringErrors, oldYieldPos = this$1.yieldPos, oldAwaitPos = this$1.awaitPos; + this$1.yieldPos = 0; + this$1.awaitPos = 0; + var exprList = this$1.parseExprList(types.parenR, this$1.options.ecmaVersion >= 8, false, refDestructuringErrors); + if (maybeAsyncArrow && !this$1.canInsertSemicolon() && this$1.eat(types.arrow)) { + this$1.checkPatternErrors(refDestructuringErrors, false); + this$1.checkYieldAwaitInDefaultParams(); + this$1.yieldPos = oldYieldPos; + this$1.awaitPos = oldAwaitPos; + return this$1.parseArrowExpression(this$1.startNodeAt(startPos, startLoc), exprList, true) + } + this$1.checkExpressionErrors(refDestructuringErrors, true); + this$1.yieldPos = oldYieldPos || this$1.yieldPos; + this$1.awaitPos = oldAwaitPos || this$1.awaitPos; + var node$1 = this$1.startNodeAt(startPos, startLoc); + node$1.callee = base; + node$1.arguments = exprList; + base = this$1.finishNode(node$1, "CallExpression"); + } else if (this$1.type === types.backQuote) { + var node$2 = this$1.startNodeAt(startPos, startLoc); + node$2.tag = base; + node$2.quasi = this$1.parseTemplate({isTagged: true}); + base = this$1.finishNode(node$2, "TaggedTemplateExpression"); + } else { + return base + } + } +}; + +// Parse an atomic expression — either a single token that is an +// expression, an expression started by a keyword like `function` or +// `new`, or an expression wrapped in punctuation like `()`, `[]`, +// or `{}`. + +pp$3.parseExprAtom = function(refDestructuringErrors) { + var node, canBeArrow = this.potentialArrowAt === this.start; + switch (this.type) { + case types._super: + if (!this.inFunction) + { this.raise(this.start, "'super' outside of function or class"); } + node = this.startNode(); + this.next(); + // The `super` keyword can appear at below: + // SuperProperty: + // super [ Expression ] + // super . IdentifierName + // SuperCall: + // super Arguments + if (this.type !== types.dot && this.type !== types.bracketL && this.type !== types.parenL) + { this.unexpected(); } + return this.finishNode(node, "Super") + + case types._this: + node = this.startNode(); + this.next(); + return this.finishNode(node, "ThisExpression") + + case types.name: + var startPos = this.start, startLoc = this.startLoc, containsEsc = this.containsEsc; + var id = this.parseIdent(this.type !== types.name); + if (this.options.ecmaVersion >= 8 && !containsEsc && id.name === "async" && !this.canInsertSemicolon() && this.eat(types._function)) + { return this.parseFunction(this.startNodeAt(startPos, startLoc), false, false, true) } + if (canBeArrow && !this.canInsertSemicolon()) { + if (this.eat(types.arrow)) + { return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), [id], false) } + if (this.options.ecmaVersion >= 8 && id.name === "async" && this.type === types.name && !containsEsc) { + id = this.parseIdent(); + if (this.canInsertSemicolon() || !this.eat(types.arrow)) + { this.unexpected(); } + return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), [id], true) + } + } + return id + + case types.regexp: + var value = this.value; + node = this.parseLiteral(value.value); + node.regex = {pattern: value.pattern, flags: value.flags}; + return node + + case types.num: case types.string: + return this.parseLiteral(this.value) + + case types._null: case types._true: case types._false: + node = this.startNode(); + node.value = this.type === types._null ? null : this.type === types._true; + node.raw = this.type.keyword; + this.next(); + return this.finishNode(node, "Literal") + + case types.parenL: + var start = this.start, expr = this.parseParenAndDistinguishExpression(canBeArrow); + if (refDestructuringErrors) { + if (refDestructuringErrors.parenthesizedAssign < 0 && !this.isSimpleAssignTarget(expr)) + { refDestructuringErrors.parenthesizedAssign = start; } + if (refDestructuringErrors.parenthesizedBind < 0) + { refDestructuringErrors.parenthesizedBind = start; } + } + return expr + + case types.bracketL: + node = this.startNode(); + this.next(); + node.elements = this.parseExprList(types.bracketR, true, true, refDestructuringErrors); + return this.finishNode(node, "ArrayExpression") + + case types.braceL: + return this.parseObj(false, refDestructuringErrors) + + case types._function: + node = this.startNode(); + this.next(); + return this.parseFunction(node, false) + + case types._class: + return this.parseClass(this.startNode(), false) + + case types._new: + return this.parseNew() + + case types.backQuote: + return this.parseTemplate() + + default: + this.unexpected(); + } +}; + +pp$3.parseLiteral = function(value) { + var node = this.startNode(); + node.value = value; + node.raw = this.input.slice(this.start, this.end); + this.next(); + return this.finishNode(node, "Literal") +}; + +pp$3.parseParenExpression = function() { + this.expect(types.parenL); + var val = this.parseExpression(); + this.expect(types.parenR); + return val +}; + +pp$3.parseParenAndDistinguishExpression = function(canBeArrow) { + var this$1 = this; + + var startPos = this.start, startLoc = this.startLoc, val, allowTrailingComma = this.options.ecmaVersion >= 8; + if (this.options.ecmaVersion >= 6) { + this.next(); + + var innerStartPos = this.start, innerStartLoc = this.startLoc; + var exprList = [], first = true, lastIsComma = false; + var refDestructuringErrors = new DestructuringErrors, oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, spreadStart; + this.yieldPos = 0; + this.awaitPos = 0; + while (this.type !== types.parenR) { + first ? first = false : this$1.expect(types.comma); + if (allowTrailingComma && this$1.afterTrailingComma(types.parenR, true)) { + lastIsComma = true; + break + } else if (this$1.type === types.ellipsis) { + spreadStart = this$1.start; + exprList.push(this$1.parseParenItem(this$1.parseRestBinding())); + if (this$1.type === types.comma) { this$1.raise(this$1.start, "Comma is not permitted after the rest element"); } + break + } else { + exprList.push(this$1.parseMaybeAssign(false, refDestructuringErrors, this$1.parseParenItem)); + } + } + var innerEndPos = this.start, innerEndLoc = this.startLoc; + this.expect(types.parenR); + + if (canBeArrow && !this.canInsertSemicolon() && this.eat(types.arrow)) { + this.checkPatternErrors(refDestructuringErrors, false); + this.checkYieldAwaitInDefaultParams(); + this.yieldPos = oldYieldPos; + this.awaitPos = oldAwaitPos; + return this.parseParenArrowList(startPos, startLoc, exprList) + } + + if (!exprList.length || lastIsComma) { this.unexpected(this.lastTokStart); } + if (spreadStart) { this.unexpected(spreadStart); } + this.checkExpressionErrors(refDestructuringErrors, true); + this.yieldPos = oldYieldPos || this.yieldPos; + this.awaitPos = oldAwaitPos || this.awaitPos; + + if (exprList.length > 1) { + val = this.startNodeAt(innerStartPos, innerStartLoc); + val.expressions = exprList; + this.finishNodeAt(val, "SequenceExpression", innerEndPos, innerEndLoc); + } else { + val = exprList[0]; + } + } else { + val = this.parseParenExpression(); + } + + if (this.options.preserveParens) { + var par = this.startNodeAt(startPos, startLoc); + par.expression = val; + return this.finishNode(par, "ParenthesizedExpression") + } else { + return val + } +}; + +pp$3.parseParenItem = function(item) { + return item +}; + +pp$3.parseParenArrowList = function(startPos, startLoc, exprList) { + return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), exprList) +}; + +// New's precedence is slightly tricky. It must allow its argument to +// be a `[]` or dot subscript expression, but not a call — at least, +// not without wrapping it in parentheses. Thus, it uses the noCalls +// argument to parseSubscripts to prevent it from consuming the +// argument list. + +var empty$1 = []; + +pp$3.parseNew = function() { + var node = this.startNode(); + var meta = this.parseIdent(true); + if (this.options.ecmaVersion >= 6 && this.eat(types.dot)) { + node.meta = meta; + var containsEsc = this.containsEsc; + node.property = this.parseIdent(true); + if (node.property.name !== "target" || containsEsc) + { this.raiseRecoverable(node.property.start, "The only valid meta property for new is new.target"); } + if (!this.inFunction) + { this.raiseRecoverable(node.start, "new.target can only be used in functions"); } + return this.finishNode(node, "MetaProperty") + } + var startPos = this.start, startLoc = this.startLoc; + node.callee = this.parseSubscripts(this.parseExprAtom(), startPos, startLoc, true); + if (this.eat(types.parenL)) { node.arguments = this.parseExprList(types.parenR, this.options.ecmaVersion >= 8, false); } + else { node.arguments = empty$1; } + return this.finishNode(node, "NewExpression") +}; + +// Parse template expression. + +pp$3.parseTemplateElement = function(ref) { + var isTagged = ref.isTagged; + + var elem = this.startNode(); + if (this.type === types.invalidTemplate) { + if (!isTagged) { + this.raiseRecoverable(this.start, "Bad escape sequence in untagged template literal"); + } + elem.value = { + raw: this.value, + cooked: null + }; + } else { + elem.value = { + raw: this.input.slice(this.start, this.end).replace(/\r\n?/g, "\n"), + cooked: this.value + }; + } + this.next(); + elem.tail = this.type === types.backQuote; + return this.finishNode(elem, "TemplateElement") +}; + +pp$3.parseTemplate = function(ref) { + var this$1 = this; + if ( ref === void 0 ) ref = {}; + var isTagged = ref.isTagged; if ( isTagged === void 0 ) isTagged = false; + + var node = this.startNode(); + this.next(); + node.expressions = []; + var curElt = this.parseTemplateElement({isTagged: isTagged}); + node.quasis = [curElt]; + while (!curElt.tail) { + if (this$1.type === types.eof) { this$1.raise(this$1.pos, "Unterminated template literal"); } + this$1.expect(types.dollarBraceL); + node.expressions.push(this$1.parseExpression()); + this$1.expect(types.braceR); + node.quasis.push(curElt = this$1.parseTemplateElement({isTagged: isTagged})); + } + this.next(); + return this.finishNode(node, "TemplateLiteral") +}; + +pp$3.isAsyncProp = function(prop) { + return !prop.computed && prop.key.type === "Identifier" && prop.key.name === "async" && + (this.type === types.name || this.type === types.num || this.type === types.string || this.type === types.bracketL || this.type.keyword || (this.options.ecmaVersion >= 9 && this.type === types.star)) && + !lineBreak.test(this.input.slice(this.lastTokEnd, this.start)) +}; + +// Parse an object literal or binding pattern. + +pp$3.parseObj = function(isPattern, refDestructuringErrors) { + var this$1 = this; + + var node = this.startNode(), first = true, propHash = {}; + node.properties = []; + this.next(); + while (!this.eat(types.braceR)) { + if (!first) { + this$1.expect(types.comma); + if (this$1.afterTrailingComma(types.braceR)) { break } + } else { first = false; } + + var prop = this$1.parseProperty(isPattern, refDestructuringErrors); + if (!isPattern) { this$1.checkPropClash(prop, propHash, refDestructuringErrors); } + node.properties.push(prop); + } + return this.finishNode(node, isPattern ? "ObjectPattern" : "ObjectExpression") +}; + +pp$3.parseProperty = function(isPattern, refDestructuringErrors) { + var prop = this.startNode(), isGenerator, isAsync, startPos, startLoc; + if (this.options.ecmaVersion >= 9 && this.eat(types.ellipsis)) { + if (isPattern) { + prop.argument = this.parseIdent(false); + if (this.type === types.comma) { + this.raise(this.start, "Comma is not permitted after the rest element"); + } + return this.finishNode(prop, "RestElement") + } + // To disallow parenthesized identifier via `this.toAssignable()`. + if (this.type === types.parenL && refDestructuringErrors) { + if (refDestructuringErrors.parenthesizedAssign < 0) { + refDestructuringErrors.parenthesizedAssign = this.start; + } + if (refDestructuringErrors.parenthesizedBind < 0) { + refDestructuringErrors.parenthesizedBind = this.start; + } + } + // Parse argument. + prop.argument = this.parseMaybeAssign(false, refDestructuringErrors); + // To disallow trailing comma via `this.toAssignable()`. + if (this.type === types.comma && refDestructuringErrors && refDestructuringErrors.trailingComma < 0) { + refDestructuringErrors.trailingComma = this.start; + } + // Finish + return this.finishNode(prop, "SpreadElement") + } + if (this.options.ecmaVersion >= 6) { + prop.method = false; + prop.shorthand = false; + if (isPattern || refDestructuringErrors) { + startPos = this.start; + startLoc = this.startLoc; + } + if (!isPattern) + { isGenerator = this.eat(types.star); } + } + var containsEsc = this.containsEsc; + this.parsePropertyName(prop); + if (!isPattern && !containsEsc && this.options.ecmaVersion >= 8 && !isGenerator && this.isAsyncProp(prop)) { + isAsync = true; + isGenerator = this.options.ecmaVersion >= 9 && this.eat(types.star); + this.parsePropertyName(prop, refDestructuringErrors); + } else { + isAsync = false; + } + this.parsePropertyValue(prop, isPattern, isGenerator, isAsync, startPos, startLoc, refDestructuringErrors, containsEsc); + return this.finishNode(prop, "Property") +}; + +pp$3.parsePropertyValue = function(prop, isPattern, isGenerator, isAsync, startPos, startLoc, refDestructuringErrors, containsEsc) { + if ((isGenerator || isAsync) && this.type === types.colon) + { this.unexpected(); } + + if (this.eat(types.colon)) { + prop.value = isPattern ? this.parseMaybeDefault(this.start, this.startLoc) : this.parseMaybeAssign(false, refDestructuringErrors); + prop.kind = "init"; + } else if (this.options.ecmaVersion >= 6 && this.type === types.parenL) { + if (isPattern) { this.unexpected(); } + prop.kind = "init"; + prop.method = true; + prop.value = this.parseMethod(isGenerator, isAsync); + } else if (!isPattern && !containsEsc && + this.options.ecmaVersion >= 5 && !prop.computed && prop.key.type === "Identifier" && + (prop.key.name === "get" || prop.key.name === "set") && + (this.type !== types.comma && this.type !== types.braceR)) { + if (isGenerator || isAsync) { this.unexpected(); } + prop.kind = prop.key.name; + this.parsePropertyName(prop); + prop.value = this.parseMethod(false); + var paramCount = prop.kind === "get" ? 0 : 1; + if (prop.value.params.length !== paramCount) { + var start = prop.value.start; + if (prop.kind === "get") + { this.raiseRecoverable(start, "getter should have no params"); } + else + { this.raiseRecoverable(start, "setter should have exactly one param"); } + } else { + if (prop.kind === "set" && prop.value.params[0].type === "RestElement") + { this.raiseRecoverable(prop.value.params[0].start, "Setter cannot use rest params"); } + } + } else if (this.options.ecmaVersion >= 6 && !prop.computed && prop.key.type === "Identifier") { + this.checkUnreserved(prop.key); + prop.kind = "init"; + if (isPattern) { + prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key); + } else if (this.type === types.eq && refDestructuringErrors) { + if (refDestructuringErrors.shorthandAssign < 0) + { refDestructuringErrors.shorthandAssign = this.start; } + prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key); + } else { + prop.value = prop.key; + } + prop.shorthand = true; + } else { this.unexpected(); } +}; + +pp$3.parsePropertyName = function(prop) { + if (this.options.ecmaVersion >= 6) { + if (this.eat(types.bracketL)) { + prop.computed = true; + prop.key = this.parseMaybeAssign(); + this.expect(types.bracketR); + return prop.key + } else { + prop.computed = false; + } + } + return prop.key = this.type === types.num || this.type === types.string ? this.parseExprAtom() : this.parseIdent(true) +}; + +// Initialize empty function node. + +pp$3.initFunction = function(node) { + node.id = null; + if (this.options.ecmaVersion >= 6) { + node.generator = false; + node.expression = false; + } + if (this.options.ecmaVersion >= 8) + { node.async = false; } +}; + +// Parse object or class method. + +pp$3.parseMethod = function(isGenerator, isAsync) { + var node = this.startNode(), oldInGen = this.inGenerator, oldInAsync = this.inAsync, + oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldInFunc = this.inFunction; + + this.initFunction(node); + if (this.options.ecmaVersion >= 6) + { node.generator = isGenerator; } + if (this.options.ecmaVersion >= 8) + { node.async = !!isAsync; } + + this.inGenerator = node.generator; + this.inAsync = node.async; + this.yieldPos = 0; + this.awaitPos = 0; + this.inFunction = true; + this.enterFunctionScope(); + + this.expect(types.parenL); + node.params = this.parseBindingList(types.parenR, false, this.options.ecmaVersion >= 8); + this.checkYieldAwaitInDefaultParams(); + this.parseFunctionBody(node, false); + + this.inGenerator = oldInGen; + this.inAsync = oldInAsync; + this.yieldPos = oldYieldPos; + this.awaitPos = oldAwaitPos; + this.inFunction = oldInFunc; + return this.finishNode(node, "FunctionExpression") +}; + +// Parse arrow function expression with given parameters. + +pp$3.parseArrowExpression = function(node, params, isAsync) { + var oldInGen = this.inGenerator, oldInAsync = this.inAsync, + oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldInFunc = this.inFunction; + + this.enterFunctionScope(); + this.initFunction(node); + if (this.options.ecmaVersion >= 8) + { node.async = !!isAsync; } + + this.inGenerator = false; + this.inAsync = node.async; + this.yieldPos = 0; + this.awaitPos = 0; + this.inFunction = true; + + node.params = this.toAssignableList(params, true); + this.parseFunctionBody(node, true); + + this.inGenerator = oldInGen; + this.inAsync = oldInAsync; + this.yieldPos = oldYieldPos; + this.awaitPos = oldAwaitPos; + this.inFunction = oldInFunc; + return this.finishNode(node, "ArrowFunctionExpression") +}; + +// Parse function body and check parameters. + +pp$3.parseFunctionBody = function(node, isArrowFunction) { + var isExpression = isArrowFunction && this.type !== types.braceL; + var oldStrict = this.strict, useStrict = false; + + if (isExpression) { + node.body = this.parseMaybeAssign(); + node.expression = true; + this.checkParams(node, false); + } else { + var nonSimple = this.options.ecmaVersion >= 7 && !this.isSimpleParamList(node.params); + if (!oldStrict || nonSimple) { + useStrict = this.strictDirective(this.end); + // If this is a strict mode function, verify that argument names + // are not repeated, and it does not try to bind the words `eval` + // or `arguments`. + if (useStrict && nonSimple) + { this.raiseRecoverable(node.start, "Illegal 'use strict' directive in function with non-simple parameter list"); } + } + // Start a new scope with regard to labels and the `inFunction` + // flag (restore them to their old value afterwards). + var oldLabels = this.labels; + this.labels = []; + if (useStrict) { this.strict = true; } + + // Add the params to varDeclaredNames to ensure that an error is thrown + // if a let/const declaration in the function clashes with one of the params. + this.checkParams(node, !oldStrict && !useStrict && !isArrowFunction && this.isSimpleParamList(node.params)); + node.body = this.parseBlock(false); + node.expression = false; + this.adaptDirectivePrologue(node.body.body); + this.labels = oldLabels; + } + this.exitFunctionScope(); + + if (this.strict && node.id) { + // Ensure the function name isn't a forbidden identifier in strict mode, e.g. 'eval' + this.checkLVal(node.id, "none"); + } + this.strict = oldStrict; +}; + +pp$3.isSimpleParamList = function(params) { + for (var i = 0, list = params; i < list.length; i += 1) + { + var param = list[i]; + + if (param.type !== "Identifier") { return false + } } + return true +}; + +// Checks function params for various disallowed patterns such as using "eval" +// or "arguments" and duplicate parameters. + +pp$3.checkParams = function(node, allowDuplicates) { + var this$1 = this; + + var nameHash = {}; + for (var i = 0, list = node.params; i < list.length; i += 1) + { + var param = list[i]; + + this$1.checkLVal(param, "var", allowDuplicates ? null : nameHash); + } +}; + +// Parses a comma-separated list of expressions, and returns them as +// an array. `close` is the token type that ends the list, and +// `allowEmpty` can be turned on to allow subsequent commas with +// nothing in between them to be parsed as `null` (which is needed +// for array literals). + +pp$3.parseExprList = function(close, allowTrailingComma, allowEmpty, refDestructuringErrors) { + var this$1 = this; + + var elts = [], first = true; + while (!this.eat(close)) { + if (!first) { + this$1.expect(types.comma); + if (allowTrailingComma && this$1.afterTrailingComma(close)) { break } + } else { first = false; } + + var elt = (void 0); + if (allowEmpty && this$1.type === types.comma) + { elt = null; } + else if (this$1.type === types.ellipsis) { + elt = this$1.parseSpread(refDestructuringErrors); + if (refDestructuringErrors && this$1.type === types.comma && refDestructuringErrors.trailingComma < 0) + { refDestructuringErrors.trailingComma = this$1.start; } + } else { + elt = this$1.parseMaybeAssign(false, refDestructuringErrors); + } + elts.push(elt); + } + return elts +}; + +pp$3.checkUnreserved = function(ref) { + var start = ref.start; + var end = ref.end; + var name = ref.name; + + if (this.inGenerator && name === "yield") + { this.raiseRecoverable(start, "Can not use 'yield' as identifier inside a generator"); } + if (this.inAsync && name === "await") + { this.raiseRecoverable(start, "Can not use 'await' as identifier inside an async function"); } + if (this.isKeyword(name)) + { this.raise(start, ("Unexpected keyword '" + name + "'")); } + if (this.options.ecmaVersion < 6 && + this.input.slice(start, end).indexOf("\\") !== -1) { return } + var re = this.strict ? this.reservedWordsStrict : this.reservedWords; + if (re.test(name)) { + if (!this.inAsync && name === "await") + { this.raiseRecoverable(start, "Can not use keyword 'await' outside an async function"); } + this.raiseRecoverable(start, ("The keyword '" + name + "' is reserved")); + } +}; + +// Parse the next token as an identifier. If `liberal` is true (used +// when parsing properties), it will also convert keywords into +// identifiers. + +pp$3.parseIdent = function(liberal, isBinding) { + var node = this.startNode(); + if (liberal && this.options.allowReserved === "never") { liberal = false; } + if (this.type === types.name) { + node.name = this.value; + } else if (this.type.keyword) { + node.name = this.type.keyword; + + // To fix https://github.com/acornjs/acorn/issues/575 + // `class` and `function` keywords push new context into this.context. + // But there is no chance to pop the context if the keyword is consumed as an identifier such as a property name. + // If the previous token is a dot, this does not apply because the context-managing code already ignored the keyword + if ((node.name === "class" || node.name === "function") && + (this.lastTokEnd !== this.lastTokStart + 1 || this.input.charCodeAt(this.lastTokStart) !== 46)) { + this.context.pop(); + } + } else { + this.unexpected(); + } + this.next(); + this.finishNode(node, "Identifier"); + if (!liberal) { this.checkUnreserved(node); } + return node +}; + +// Parses yield expression inside generator. + +pp$3.parseYield = function() { + if (!this.yieldPos) { this.yieldPos = this.start; } + + var node = this.startNode(); + this.next(); + if (this.type === types.semi || this.canInsertSemicolon() || (this.type !== types.star && !this.type.startsExpr)) { + node.delegate = false; + node.argument = null; + } else { + node.delegate = this.eat(types.star); + node.argument = this.parseMaybeAssign(); + } + return this.finishNode(node, "YieldExpression") +}; + +pp$3.parseAwait = function() { + if (!this.awaitPos) { this.awaitPos = this.start; } + + var node = this.startNode(); + this.next(); + node.argument = this.parseMaybeUnary(null, true); + return this.finishNode(node, "AwaitExpression") +}; + +var pp$4 = Parser.prototype; + +// This function is used to raise exceptions on parse errors. It +// takes an offset integer (into the current `input`) to indicate +// the location of the error, attaches the position to the end +// of the error message, and then raises a `SyntaxError` with that +// message. + +pp$4.raise = function(pos, message) { + var loc = getLineInfo(this.input, pos); + message += " (" + loc.line + ":" + loc.column + ")"; + var err = new SyntaxError(message); + err.pos = pos; err.loc = loc; err.raisedAt = this.pos; + throw err +}; + +pp$4.raiseRecoverable = pp$4.raise; + +pp$4.curPosition = function() { + if (this.options.locations) { + return new Position(this.curLine, this.pos - this.lineStart) + } +}; + +var pp$5 = Parser.prototype; + +// Object.assign polyfill +var assign = Object.assign || function(target) { + var sources = [], len = arguments.length - 1; + while ( len-- > 0 ) sources[ len ] = arguments[ len + 1 ]; + + for (var i = 0, list = sources; i < list.length; i += 1) { + var source = list[i]; + + for (var key in source) { + if (has(source, key)) { + target[key] = source[key]; + } + } + } + return target +}; + +// The functions in this module keep track of declared variables in the current scope in order to detect duplicate variable names. + +pp$5.enterFunctionScope = function() { + // var: a hash of var-declared names in the current lexical scope + // lexical: a hash of lexically-declared names in the current lexical scope + // childVar: a hash of var-declared names in all child lexical scopes of the current lexical scope (within the current function scope) + // parentLexical: a hash of lexically-declared names in all parent lexical scopes of the current lexical scope (within the current function scope) + this.scopeStack.push({var: {}, lexical: {}, childVar: {}, parentLexical: {}}); +}; + +pp$5.exitFunctionScope = function() { + this.scopeStack.pop(); +}; + +pp$5.enterLexicalScope = function() { + var parentScope = this.scopeStack[this.scopeStack.length - 1]; + var childScope = {var: {}, lexical: {}, childVar: {}, parentLexical: {}}; + + this.scopeStack.push(childScope); + assign(childScope.parentLexical, parentScope.lexical, parentScope.parentLexical); +}; + +pp$5.exitLexicalScope = function() { + var childScope = this.scopeStack.pop(); + var parentScope = this.scopeStack[this.scopeStack.length - 1]; + + assign(parentScope.childVar, childScope.var, childScope.childVar); +}; + +/** + * A name can be declared with `var` if there are no variables with the same name declared with `let`/`const` + * in the current lexical scope or any of the parent lexical scopes in this function. + */ +pp$5.canDeclareVarName = function(name) { + var currentScope = this.scopeStack[this.scopeStack.length - 1]; + + return !has(currentScope.lexical, name) && !has(currentScope.parentLexical, name) +}; + +/** + * A name can be declared with `let`/`const` if there are no variables with the same name declared with `let`/`const` + * in the current scope, and there are no variables with the same name declared with `var` in the current scope or in + * any child lexical scopes in this function. + */ +pp$5.canDeclareLexicalName = function(name) { + var currentScope = this.scopeStack[this.scopeStack.length - 1]; + + return !has(currentScope.lexical, name) && !has(currentScope.var, name) && !has(currentScope.childVar, name) +}; + +pp$5.declareVarName = function(name) { + this.scopeStack[this.scopeStack.length - 1].var[name] = true; +}; + +pp$5.declareLexicalName = function(name) { + this.scopeStack[this.scopeStack.length - 1].lexical[name] = true; +}; + +var Node = function Node(parser, pos, loc) { + this.type = ""; + this.start = pos; + this.end = 0; + if (parser.options.locations) + { this.loc = new SourceLocation(parser, loc); } + if (parser.options.directSourceFile) + { this.sourceFile = parser.options.directSourceFile; } + if (parser.options.ranges) + { this.range = [pos, 0]; } +}; + +// Start an AST node, attaching a start offset. + +var pp$6 = Parser.prototype; + +pp$6.startNode = function() { + return new Node(this, this.start, this.startLoc) +}; + +pp$6.startNodeAt = function(pos, loc) { + return new Node(this, pos, loc) +}; + +// Finish an AST node, adding `type` and `end` properties. + +function finishNodeAt(node, type, pos, loc) { + node.type = type; + node.end = pos; + if (this.options.locations) + { node.loc.end = loc; } + if (this.options.ranges) + { node.range[1] = pos; } + return node +} + +pp$6.finishNode = function(node, type) { + return finishNodeAt.call(this, node, type, this.lastTokEnd, this.lastTokEndLoc) +}; + +// Finish node at given position + +pp$6.finishNodeAt = function(node, type, pos, loc) { + return finishNodeAt.call(this, node, type, pos, loc) +}; + +// The algorithm used to determine whether a regexp can appear at a +// given point in the program is loosely based on sweet.js' approach. +// See https://github.com/mozilla/sweet.js/wiki/design + +var TokContext = function TokContext(token, isExpr, preserveSpace, override, generator) { + this.token = token; + this.isExpr = !!isExpr; + this.preserveSpace = !!preserveSpace; + this.override = override; + this.generator = !!generator; +}; + +var types$1 = { + b_stat: new TokContext("{", false), + b_expr: new TokContext("{", true), + b_tmpl: new TokContext("${", false), + p_stat: new TokContext("(", false), + p_expr: new TokContext("(", true), + q_tmpl: new TokContext("`", true, true, function (p) { return p.tryReadTemplateToken(); }), + f_stat: new TokContext("function", false), + f_expr: new TokContext("function", true), + f_expr_gen: new TokContext("function", true, false, null, true), + f_gen: new TokContext("function", false, false, null, true) +}; + +var pp$7 = Parser.prototype; + +pp$7.initialContext = function() { + return [types$1.b_stat] +}; + +pp$7.braceIsBlock = function(prevType) { + var parent = this.curContext(); + if (parent === types$1.f_expr || parent === types$1.f_stat) + { return true } + if (prevType === types.colon && (parent === types$1.b_stat || parent === types$1.b_expr)) + { return !parent.isExpr } + + // The check for `tt.name && exprAllowed` detects whether we are + // after a `yield` or `of` construct. See the `updateContext` for + // `tt.name`. + if (prevType === types._return || prevType === types.name && this.exprAllowed) + { return lineBreak.test(this.input.slice(this.lastTokEnd, this.start)) } + if (prevType === types._else || prevType === types.semi || prevType === types.eof || prevType === types.parenR || prevType === types.arrow) + { return true } + if (prevType === types.braceL) + { return parent === types$1.b_stat } + if (prevType === types._var || prevType === types.name) + { return false } + return !this.exprAllowed +}; + +pp$7.inGeneratorContext = function() { + var this$1 = this; + + for (var i = this.context.length - 1; i >= 1; i--) { + var context = this$1.context[i]; + if (context.token === "function") + { return context.generator } + } + return false +}; + +pp$7.updateContext = function(prevType) { + var update, type = this.type; + if (type.keyword && prevType === types.dot) + { this.exprAllowed = false; } + else if (update = type.updateContext) + { update.call(this, prevType); } + else + { this.exprAllowed = type.beforeExpr; } +}; + +// Token-specific context update code + +types.parenR.updateContext = types.braceR.updateContext = function() { + if (this.context.length === 1) { + this.exprAllowed = true; + return + } + var out = this.context.pop(); + if (out === types$1.b_stat && this.curContext().token === "function") { + out = this.context.pop(); + } + this.exprAllowed = !out.isExpr; +}; + +types.braceL.updateContext = function(prevType) { + this.context.push(this.braceIsBlock(prevType) ? types$1.b_stat : types$1.b_expr); + this.exprAllowed = true; +}; + +types.dollarBraceL.updateContext = function() { + this.context.push(types$1.b_tmpl); + this.exprAllowed = true; +}; + +types.parenL.updateContext = function(prevType) { + var statementParens = prevType === types._if || prevType === types._for || prevType === types._with || prevType === types._while; + this.context.push(statementParens ? types$1.p_stat : types$1.p_expr); + this.exprAllowed = true; +}; + +types.incDec.updateContext = function() { + // tokExprAllowed stays unchanged +}; + +types._function.updateContext = types._class.updateContext = function(prevType) { + if (prevType.beforeExpr && prevType !== types.semi && prevType !== types._else && + !((prevType === types.colon || prevType === types.braceL) && this.curContext() === types$1.b_stat)) + { this.context.push(types$1.f_expr); } + else + { this.context.push(types$1.f_stat); } + this.exprAllowed = false; +}; + +types.backQuote.updateContext = function() { + if (this.curContext() === types$1.q_tmpl) + { this.context.pop(); } + else + { this.context.push(types$1.q_tmpl); } + this.exprAllowed = false; +}; + +types.star.updateContext = function(prevType) { + if (prevType === types._function) { + var index = this.context.length - 1; + if (this.context[index] === types$1.f_expr) + { this.context[index] = types$1.f_expr_gen; } + else + { this.context[index] = types$1.f_gen; } + } + this.exprAllowed = true; +}; + +types.name.updateContext = function(prevType) { + var allowed = false; + if (this.options.ecmaVersion >= 6 && prevType !== types.dot) { + if (this.value === "of" && !this.exprAllowed || + this.value === "yield" && this.inGeneratorContext()) + { allowed = true; } + } + this.exprAllowed = allowed; +}; + +var data = { + "$LONE": [ + "ASCII", + "ASCII_Hex_Digit", + "AHex", + "Alphabetic", + "Alpha", + "Any", + "Assigned", + "Bidi_Control", + "Bidi_C", + "Bidi_Mirrored", + "Bidi_M", + "Case_Ignorable", + "CI", + "Cased", + "Changes_When_Casefolded", + "CWCF", + "Changes_When_Casemapped", + "CWCM", + "Changes_When_Lowercased", + "CWL", + "Changes_When_NFKC_Casefolded", + "CWKCF", + "Changes_When_Titlecased", + "CWT", + "Changes_When_Uppercased", + "CWU", + "Dash", + "Default_Ignorable_Code_Point", + "DI", + "Deprecated", + "Dep", + "Diacritic", + "Dia", + "Emoji", + "Emoji_Component", + "Emoji_Modifier", + "Emoji_Modifier_Base", + "Emoji_Presentation", + "Extender", + "Ext", + "Grapheme_Base", + "Gr_Base", + "Grapheme_Extend", + "Gr_Ext", + "Hex_Digit", + "Hex", + "IDS_Binary_Operator", + "IDSB", + "IDS_Trinary_Operator", + "IDST", + "ID_Continue", + "IDC", + "ID_Start", + "IDS", + "Ideographic", + "Ideo", + "Join_Control", + "Join_C", + "Logical_Order_Exception", + "LOE", + "Lowercase", + "Lower", + "Math", + "Noncharacter_Code_Point", + "NChar", + "Pattern_Syntax", + "Pat_Syn", + "Pattern_White_Space", + "Pat_WS", + "Quotation_Mark", + "QMark", + "Radical", + "Regional_Indicator", + "RI", + "Sentence_Terminal", + "STerm", + "Soft_Dotted", + "SD", + "Terminal_Punctuation", + "Term", + "Unified_Ideograph", + "UIdeo", + "Uppercase", + "Upper", + "Variation_Selector", + "VS", + "White_Space", + "space", + "XID_Continue", + "XIDC", + "XID_Start", + "XIDS" + ], + "General_Category": [ + "Cased_Letter", + "LC", + "Close_Punctuation", + "Pe", + "Connector_Punctuation", + "Pc", + "Control", + "Cc", + "cntrl", + "Currency_Symbol", + "Sc", + "Dash_Punctuation", + "Pd", + "Decimal_Number", + "Nd", + "digit", + "Enclosing_Mark", + "Me", + "Final_Punctuation", + "Pf", + "Format", + "Cf", + "Initial_Punctuation", + "Pi", + "Letter", + "L", + "Letter_Number", + "Nl", + "Line_Separator", + "Zl", + "Lowercase_Letter", + "Ll", + "Mark", + "M", + "Combining_Mark", + "Math_Symbol", + "Sm", + "Modifier_Letter", + "Lm", + "Modifier_Symbol", + "Sk", + "Nonspacing_Mark", + "Mn", + "Number", + "N", + "Open_Punctuation", + "Ps", + "Other", + "C", + "Other_Letter", + "Lo", + "Other_Number", + "No", + "Other_Punctuation", + "Po", + "Other_Symbol", + "So", + "Paragraph_Separator", + "Zp", + "Private_Use", + "Co", + "Punctuation", + "P", + "punct", + "Separator", + "Z", + "Space_Separator", + "Zs", + "Spacing_Mark", + "Mc", + "Surrogate", + "Cs", + "Symbol", + "S", + "Titlecase_Letter", + "Lt", + "Unassigned", + "Cn", + "Uppercase_Letter", + "Lu" + ], + "Script": [ + "Adlam", + "Adlm", + "Ahom", + "Anatolian_Hieroglyphs", + "Hluw", + "Arabic", + "Arab", + "Armenian", + "Armn", + "Avestan", + "Avst", + "Balinese", + "Bali", + "Bamum", + "Bamu", + "Bassa_Vah", + "Bass", + "Batak", + "Batk", + "Bengali", + "Beng", + "Bhaiksuki", + "Bhks", + "Bopomofo", + "Bopo", + "Brahmi", + "Brah", + "Braille", + "Brai", + "Buginese", + "Bugi", + "Buhid", + "Buhd", + "Canadian_Aboriginal", + "Cans", + "Carian", + "Cari", + "Caucasian_Albanian", + "Aghb", + "Chakma", + "Cakm", + "Cham", + "Cherokee", + "Cher", + "Common", + "Zyyy", + "Coptic", + "Copt", + "Qaac", + "Cuneiform", + "Xsux", + "Cypriot", + "Cprt", + "Cyrillic", + "Cyrl", + "Deseret", + "Dsrt", + "Devanagari", + "Deva", + "Duployan", + "Dupl", + "Egyptian_Hieroglyphs", + "Egyp", + "Elbasan", + "Elba", + "Ethiopic", + "Ethi", + "Georgian", + "Geor", + "Glagolitic", + "Glag", + "Gothic", + "Goth", + "Grantha", + "Gran", + "Greek", + "Grek", + "Gujarati", + "Gujr", + "Gurmukhi", + "Guru", + "Han", + "Hani", + "Hangul", + "Hang", + "Hanunoo", + "Hano", + "Hatran", + "Hatr", + "Hebrew", + "Hebr", + "Hiragana", + "Hira", + "Imperial_Aramaic", + "Armi", + "Inherited", + "Zinh", + "Qaai", + "Inscriptional_Pahlavi", + "Phli", + "Inscriptional_Parthian", + "Prti", + "Javanese", + "Java", + "Kaithi", + "Kthi", + "Kannada", + "Knda", + "Katakana", + "Kana", + "Kayah_Li", + "Kali", + "Kharoshthi", + "Khar", + "Khmer", + "Khmr", + "Khojki", + "Khoj", + "Khudawadi", + "Sind", + "Lao", + "Laoo", + "Latin", + "Latn", + "Lepcha", + "Lepc", + "Limbu", + "Limb", + "Linear_A", + "Lina", + "Linear_B", + "Linb", + "Lisu", + "Lycian", + "Lyci", + "Lydian", + "Lydi", + "Mahajani", + "Mahj", + "Malayalam", + "Mlym", + "Mandaic", + "Mand", + "Manichaean", + "Mani", + "Marchen", + "Marc", + "Masaram_Gondi", + "Gonm", + "Meetei_Mayek", + "Mtei", + "Mende_Kikakui", + "Mend", + "Meroitic_Cursive", + "Merc", + "Meroitic_Hieroglyphs", + "Mero", + "Miao", + "Plrd", + "Modi", + "Mongolian", + "Mong", + "Mro", + "Mroo", + "Multani", + "Mult", + "Myanmar", + "Mymr", + "Nabataean", + "Nbat", + "New_Tai_Lue", + "Talu", + "Newa", + "Nko", + "Nkoo", + "Nushu", + "Nshu", + "Ogham", + "Ogam", + "Ol_Chiki", + "Olck", + "Old_Hungarian", + "Hung", + "Old_Italic", + "Ital", + "Old_North_Arabian", + "Narb", + "Old_Permic", + "Perm", + "Old_Persian", + "Xpeo", + "Old_South_Arabian", + "Sarb", + "Old_Turkic", + "Orkh", + "Oriya", + "Orya", + "Osage", + "Osge", + "Osmanya", + "Osma", + "Pahawh_Hmong", + "Hmng", + "Palmyrene", + "Palm", + "Pau_Cin_Hau", + "Pauc", + "Phags_Pa", + "Phag", + "Phoenician", + "Phnx", + "Psalter_Pahlavi", + "Phlp", + "Rejang", + "Rjng", + "Runic", + "Runr", + "Samaritan", + "Samr", + "Saurashtra", + "Saur", + "Sharada", + "Shrd", + "Shavian", + "Shaw", + "Siddham", + "Sidd", + "SignWriting", + "Sgnw", + "Sinhala", + "Sinh", + "Sora_Sompeng", + "Sora", + "Soyombo", + "Soyo", + "Sundanese", + "Sund", + "Syloti_Nagri", + "Sylo", + "Syriac", + "Syrc", + "Tagalog", + "Tglg", + "Tagbanwa", + "Tagb", + "Tai_Le", + "Tale", + "Tai_Tham", + "Lana", + "Tai_Viet", + "Tavt", + "Takri", + "Takr", + "Tamil", + "Taml", + "Tangut", + "Tang", + "Telugu", + "Telu", + "Thaana", + "Thaa", + "Thai", + "Tibetan", + "Tibt", + "Tifinagh", + "Tfng", + "Tirhuta", + "Tirh", + "Ugaritic", + "Ugar", + "Vai", + "Vaii", + "Warang_Citi", + "Wara", + "Yi", + "Yiii", + "Zanabazar_Square", + "Zanb" + ] +}; +Array.prototype.push.apply(data.$LONE, data.General_Category); +data.gc = data.General_Category; +data.sc = data.Script_Extensions = data.scx = data.Script; + +var pp$9 = Parser.prototype; + +var RegExpValidationState = function RegExpValidationState(parser) { + this.parser = parser; + this.validFlags = "gim" + (parser.options.ecmaVersion >= 6 ? "uy" : "") + (parser.options.ecmaVersion >= 9 ? "s" : ""); + this.source = ""; + this.flags = ""; + this.start = 0; + this.switchU = false; + this.switchN = false; + this.pos = 0; + this.lastIntValue = 0; + this.lastStringValue = ""; + this.lastAssertionIsQuantifiable = false; + this.numCapturingParens = 0; + this.maxBackReference = 0; + this.groupNames = []; + this.backReferenceNames = []; +}; + +RegExpValidationState.prototype.reset = function reset (start, pattern, flags) { + var unicode = flags.indexOf("u") !== -1; + this.start = start | 0; + this.source = pattern + ""; + this.flags = flags; + this.switchU = unicode && this.parser.options.ecmaVersion >= 6; + this.switchN = unicode && this.parser.options.ecmaVersion >= 9; +}; + +RegExpValidationState.prototype.raise = function raise (message) { + this.parser.raiseRecoverable(this.start, ("Invalid regular expression: /" + (this.source) + "/: " + message)); +}; + +// If u flag is given, this returns the code point at the index (it combines a surrogate pair). +// Otherwise, this returns the code unit of the index (can be a part of a surrogate pair). +RegExpValidationState.prototype.at = function at (i) { + var s = this.source; + var l = s.length; + if (i >= l) { + return -1 + } + var c = s.charCodeAt(i); + if (!this.switchU || c <= 0xD7FF || c >= 0xE000 || i + 1 >= l) { + return c + } + return (c << 10) + s.charCodeAt(i + 1) - 0x35FDC00 +}; + +RegExpValidationState.prototype.nextIndex = function nextIndex (i) { + var s = this.source; + var l = s.length; + if (i >= l) { + return l + } + var c = s.charCodeAt(i); + if (!this.switchU || c <= 0xD7FF || c >= 0xE000 || i + 1 >= l) { + return i + 1 + } + return i + 2 +}; + +RegExpValidationState.prototype.current = function current () { + return this.at(this.pos) +}; + +RegExpValidationState.prototype.lookahead = function lookahead () { + return this.at(this.nextIndex(this.pos)) +}; + +RegExpValidationState.prototype.advance = function advance () { + this.pos = this.nextIndex(this.pos); +}; + +RegExpValidationState.prototype.eat = function eat (ch) { + if (this.current() === ch) { + this.advance(); + return true + } + return false +}; + +function codePointToString$1(ch) { + if (ch <= 0xFFFF) { return String.fromCharCode(ch) } + ch -= 0x10000; + return String.fromCharCode((ch >> 10) + 0xD800, (ch & 0x03FF) + 0xDC00) +} + +/** + * Validate the flags part of a given RegExpLiteral. + * + * @param {RegExpValidationState} state The state to validate RegExp. + * @returns {void} + */ +pp$9.validateRegExpFlags = function(state) { + var this$1 = this; + + var validFlags = state.validFlags; + var flags = state.flags; + + for (var i = 0; i < flags.length; i++) { + var flag = flags.charAt(i); + if (validFlags.indexOf(flag) === -1) { + this$1.raise(state.start, "Invalid regular expression flag"); + } + if (flags.indexOf(flag, i + 1) > -1) { + this$1.raise(state.start, "Duplicate regular expression flag"); + } + } +}; + +/** + * Validate the pattern part of a given RegExpLiteral. + * + * @param {RegExpValidationState} state The state to validate RegExp. + * @returns {void} + */ +pp$9.validateRegExpPattern = function(state) { + this.regexp_pattern(state); + + // The goal symbol for the parse is |Pattern[~U, ~N]|. If the result of + // parsing contains a |GroupName|, reparse with the goal symbol + // |Pattern[~U, +N]| and use this result instead. Throw a *SyntaxError* + // exception if _P_ did not conform to the grammar, if any elements of _P_ + // were not matched by the parse, or if any Early Error conditions exist. + if (!state.switchN && this.options.ecmaVersion >= 9 && state.groupNames.length > 0) { + state.switchN = true; + this.regexp_pattern(state); + } +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-Pattern +pp$9.regexp_pattern = function(state) { + state.pos = 0; + state.lastIntValue = 0; + state.lastStringValue = ""; + state.lastAssertionIsQuantifiable = false; + state.numCapturingParens = 0; + state.maxBackReference = 0; + state.groupNames.length = 0; + state.backReferenceNames.length = 0; + + this.regexp_disjunction(state); + + if (state.pos !== state.source.length) { + // Make the same messages as V8. + if (state.eat(0x29 /* ) */)) { + state.raise("Unmatched ')'"); + } + if (state.eat(0x5D /* [ */) || state.eat(0x7D /* } */)) { + state.raise("Lone quantifier brackets"); + } + } + if (state.maxBackReference > state.numCapturingParens) { + state.raise("Invalid escape"); + } + for (var i = 0, list = state.backReferenceNames; i < list.length; i += 1) { + var name = list[i]; + + if (state.groupNames.indexOf(name) === -1) { + state.raise("Invalid named capture referenced"); + } + } +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-Disjunction +pp$9.regexp_disjunction = function(state) { + var this$1 = this; + + this.regexp_alternative(state); + while (state.eat(0x7C /* | */)) { + this$1.regexp_alternative(state); + } + + // Make the same message as V8. + if (this.regexp_eatQuantifier(state, true)) { + state.raise("Nothing to repeat"); + } + if (state.eat(0x7B /* { */)) { + state.raise("Lone quantifier brackets"); + } +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-Alternative +pp$9.regexp_alternative = function(state) { + while (state.pos < state.source.length && this.regexp_eatTerm(state)) + { } +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-Term +pp$9.regexp_eatTerm = function(state) { + if (this.regexp_eatAssertion(state)) { + // Handle `QuantifiableAssertion Quantifier` alternative. + // `state.lastAssertionIsQuantifiable` is true if the last eaten Assertion + // is a QuantifiableAssertion. + if (state.lastAssertionIsQuantifiable && this.regexp_eatQuantifier(state)) { + // Make the same message as V8. + if (state.switchU) { + state.raise("Invalid quantifier"); + } + } + return true + } + + if (state.switchU ? this.regexp_eatAtom(state) : this.regexp_eatExtendedAtom(state)) { + this.regexp_eatQuantifier(state); + return true + } + + return false +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-Assertion +pp$9.regexp_eatAssertion = function(state) { + var start = state.pos; + state.lastAssertionIsQuantifiable = false; + + // ^, $ + if (state.eat(0x5E /* ^ */) || state.eat(0x24 /* $ */)) { + return true + } + + // \b \B + if (state.eat(0x5C /* \ */)) { + if (state.eat(0x42 /* B */) || state.eat(0x62 /* b */)) { + return true + } + state.pos = start; + } + + // Lookahead / Lookbehind + if (state.eat(0x28 /* ( */) && state.eat(0x3F /* ? */)) { + var lookbehind = false; + if (this.options.ecmaVersion >= 9) { + lookbehind = state.eat(0x3C /* < */); + } + if (state.eat(0x3D /* = */) || state.eat(0x21 /* ! */)) { + this.regexp_disjunction(state); + if (!state.eat(0x29 /* ) */)) { + state.raise("Unterminated group"); + } + state.lastAssertionIsQuantifiable = !lookbehind; + return true + } + } + + state.pos = start; + return false +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-Quantifier +pp$9.regexp_eatQuantifier = function(state, noError) { + if ( noError === void 0 ) noError = false; + + if (this.regexp_eatQuantifierPrefix(state, noError)) { + state.eat(0x3F /* ? */); + return true + } + return false +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-QuantifierPrefix +pp$9.regexp_eatQuantifierPrefix = function(state, noError) { + return ( + state.eat(0x2A /* * */) || + state.eat(0x2B /* + */) || + state.eat(0x3F /* ? */) || + this.regexp_eatBracedQuantifier(state, noError) + ) +}; +pp$9.regexp_eatBracedQuantifier = function(state, noError) { + var start = state.pos; + if (state.eat(0x7B /* { */)) { + var min = 0, max = -1; + if (this.regexp_eatDecimalDigits(state)) { + min = state.lastIntValue; + if (state.eat(0x2C /* , */) && this.regexp_eatDecimalDigits(state)) { + max = state.lastIntValue; + } + if (state.eat(0x7D /* } */)) { + // SyntaxError in https://www.ecma-international.org/ecma-262/8.0/#sec-term + if (max !== -1 && max < min && !noError) { + state.raise("numbers out of order in {} quantifier"); + } + return true + } + } + if (state.switchU && !noError) { + state.raise("Incomplete quantifier"); + } + state.pos = start; + } + return false +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-Atom +pp$9.regexp_eatAtom = function(state) { + return ( + this.regexp_eatPatternCharacters(state) || + state.eat(0x2E /* . */) || + this.regexp_eatReverseSolidusAtomEscape(state) || + this.regexp_eatCharacterClass(state) || + this.regexp_eatUncapturingGroup(state) || + this.regexp_eatCapturingGroup(state) + ) +}; +pp$9.regexp_eatReverseSolidusAtomEscape = function(state) { + var start = state.pos; + if (state.eat(0x5C /* \ */)) { + if (this.regexp_eatAtomEscape(state)) { + return true + } + state.pos = start; + } + return false +}; +pp$9.regexp_eatUncapturingGroup = function(state) { + var start = state.pos; + if (state.eat(0x28 /* ( */)) { + if (state.eat(0x3F /* ? */) && state.eat(0x3A /* : */)) { + this.regexp_disjunction(state); + if (state.eat(0x29 /* ) */)) { + return true + } + state.raise("Unterminated group"); + } + state.pos = start; + } + return false +}; +pp$9.regexp_eatCapturingGroup = function(state) { + if (state.eat(0x28 /* ( */)) { + if (this.options.ecmaVersion >= 9) { + this.regexp_groupSpecifier(state); + } else if (state.current() === 0x3F /* ? */) { + state.raise("Invalid group"); + } + this.regexp_disjunction(state); + if (state.eat(0x29 /* ) */)) { + state.numCapturingParens += 1; + return true + } + state.raise("Unterminated group"); + } + return false +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-ExtendedAtom +pp$9.regexp_eatExtendedAtom = function(state) { + return ( + state.eat(0x2E /* . */) || + this.regexp_eatReverseSolidusAtomEscape(state) || + this.regexp_eatCharacterClass(state) || + this.regexp_eatUncapturingGroup(state) || + this.regexp_eatCapturingGroup(state) || + this.regexp_eatInvalidBracedQuantifier(state) || + this.regexp_eatExtendedPatternCharacter(state) + ) +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-InvalidBracedQuantifier +pp$9.regexp_eatInvalidBracedQuantifier = function(state) { + if (this.regexp_eatBracedQuantifier(state, true)) { + state.raise("Nothing to repeat"); + } + return false +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-SyntaxCharacter +pp$9.regexp_eatSyntaxCharacter = function(state) { + var ch = state.current(); + if (isSyntaxCharacter(ch)) { + state.lastIntValue = ch; + state.advance(); + return true + } + return false +}; +function isSyntaxCharacter(ch) { + return ( + ch === 0x24 /* $ */ || + ch >= 0x28 /* ( */ && ch <= 0x2B /* + */ || + ch === 0x2E /* . */ || + ch === 0x3F /* ? */ || + ch >= 0x5B /* [ */ && ch <= 0x5E /* ^ */ || + ch >= 0x7B /* { */ && ch <= 0x7D /* } */ + ) +} + +// https://www.ecma-international.org/ecma-262/8.0/#prod-PatternCharacter +// But eat eager. +pp$9.regexp_eatPatternCharacters = function(state) { + var start = state.pos; + var ch = 0; + while ((ch = state.current()) !== -1 && !isSyntaxCharacter(ch)) { + state.advance(); + } + return state.pos !== start +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-ExtendedPatternCharacter +pp$9.regexp_eatExtendedPatternCharacter = function(state) { + var ch = state.current(); + if ( + ch !== -1 && + ch !== 0x24 /* $ */ && + !(ch >= 0x28 /* ( */ && ch <= 0x2B /* + */) && + ch !== 0x2E /* . */ && + ch !== 0x3F /* ? */ && + ch !== 0x5B /* [ */ && + ch !== 0x5E /* ^ */ && + ch !== 0x7C /* | */ + ) { + state.advance(); + return true + } + return false +}; + +// GroupSpecifier[U] :: +// [empty] +// `?` GroupName[?U] +pp$9.regexp_groupSpecifier = function(state) { + if (state.eat(0x3F /* ? */)) { + if (this.regexp_eatGroupName(state)) { + if (state.groupNames.indexOf(state.lastStringValue) !== -1) { + state.raise("Duplicate capture group name"); + } + state.groupNames.push(state.lastStringValue); + return + } + state.raise("Invalid group"); + } +}; + +// GroupName[U] :: +// `<` RegExpIdentifierName[?U] `>` +// Note: this updates `state.lastStringValue` property with the eaten name. +pp$9.regexp_eatGroupName = function(state) { + state.lastStringValue = ""; + if (state.eat(0x3C /* < */)) { + if (this.regexp_eatRegExpIdentifierName(state) && state.eat(0x3E /* > */)) { + return true + } + state.raise("Invalid capture group name"); + } + return false +}; + +// RegExpIdentifierName[U] :: +// RegExpIdentifierStart[?U] +// RegExpIdentifierName[?U] RegExpIdentifierPart[?U] +// Note: this updates `state.lastStringValue` property with the eaten name. +pp$9.regexp_eatRegExpIdentifierName = function(state) { + state.lastStringValue = ""; + if (this.regexp_eatRegExpIdentifierStart(state)) { + state.lastStringValue += codePointToString$1(state.lastIntValue); + while (this.regexp_eatRegExpIdentifierPart(state)) { + state.lastStringValue += codePointToString$1(state.lastIntValue); + } + return true + } + return false +}; + +// RegExpIdentifierStart[U] :: +// UnicodeIDStart +// `$` +// `_` +// `\` RegExpUnicodeEscapeSequence[?U] +pp$9.regexp_eatRegExpIdentifierStart = function(state) { + var start = state.pos; + var ch = state.current(); + state.advance(); + + if (ch === 0x5C /* \ */ && this.regexp_eatRegExpUnicodeEscapeSequence(state)) { + ch = state.lastIntValue; + } + if (isRegExpIdentifierStart(ch)) { + state.lastIntValue = ch; + return true + } + + state.pos = start; + return false +}; +function isRegExpIdentifierStart(ch) { + return isIdentifierStart(ch, true) || ch === 0x24 /* $ */ || ch === 0x5F /* _ */ +} + +// RegExpIdentifierPart[U] :: +// UnicodeIDContinue +// `$` +// `_` +// `\` RegExpUnicodeEscapeSequence[?U] +// <ZWNJ> +// <ZWJ> +pp$9.regexp_eatRegExpIdentifierPart = function(state) { + var start = state.pos; + var ch = state.current(); + state.advance(); + + if (ch === 0x5C /* \ */ && this.regexp_eatRegExpUnicodeEscapeSequence(state)) { + ch = state.lastIntValue; + } + if (isRegExpIdentifierPart(ch)) { + state.lastIntValue = ch; + return true + } + + state.pos = start; + return false +}; +function isRegExpIdentifierPart(ch) { + return isIdentifierChar(ch, true) || ch === 0x24 /* $ */ || ch === 0x5F /* _ */ || ch === 0x200C /* <ZWNJ> */ || ch === 0x200D /* <ZWJ> */ +} + +// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-AtomEscape +pp$9.regexp_eatAtomEscape = function(state) { + if ( + this.regexp_eatBackReference(state) || + this.regexp_eatCharacterClassEscape(state) || + this.regexp_eatCharacterEscape(state) || + (state.switchN && this.regexp_eatKGroupName(state)) + ) { + return true + } + if (state.switchU) { + // Make the same message as V8. + if (state.current() === 0x63 /* c */) { + state.raise("Invalid unicode escape"); + } + state.raise("Invalid escape"); + } + return false +}; +pp$9.regexp_eatBackReference = function(state) { + var start = state.pos; + if (this.regexp_eatDecimalEscape(state)) { + var n = state.lastIntValue; + if (state.switchU) { + // For SyntaxError in https://www.ecma-international.org/ecma-262/8.0/#sec-atomescape + if (n > state.maxBackReference) { + state.maxBackReference = n; + } + return true + } + if (n <= state.numCapturingParens) { + return true + } + state.pos = start; + } + return false +}; +pp$9.regexp_eatKGroupName = function(state) { + if (state.eat(0x6B /* k */)) { + if (this.regexp_eatGroupName(state)) { + state.backReferenceNames.push(state.lastStringValue); + return true + } + state.raise("Invalid named reference"); + } + return false +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-CharacterEscape +pp$9.regexp_eatCharacterEscape = function(state) { + return ( + this.regexp_eatControlEscape(state) || + this.regexp_eatCControlLetter(state) || + this.regexp_eatZero(state) || + this.regexp_eatHexEscapeSequence(state) || + this.regexp_eatRegExpUnicodeEscapeSequence(state) || + (!state.switchU && this.regexp_eatLegacyOctalEscapeSequence(state)) || + this.regexp_eatIdentityEscape(state) + ) +}; +pp$9.regexp_eatCControlLetter = function(state) { + var start = state.pos; + if (state.eat(0x63 /* c */)) { + if (this.regexp_eatControlLetter(state)) { + return true + } + state.pos = start; + } + return false +}; +pp$9.regexp_eatZero = function(state) { + if (state.current() === 0x30 /* 0 */ && !isDecimalDigit(state.lookahead())) { + state.lastIntValue = 0; + state.advance(); + return true + } + return false +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-ControlEscape +pp$9.regexp_eatControlEscape = function(state) { + var ch = state.current(); + if (ch === 0x74 /* t */) { + state.lastIntValue = 0x09; /* \t */ + state.advance(); + return true + } + if (ch === 0x6E /* n */) { + state.lastIntValue = 0x0A; /* \n */ + state.advance(); + return true + } + if (ch === 0x76 /* v */) { + state.lastIntValue = 0x0B; /* \v */ + state.advance(); + return true + } + if (ch === 0x66 /* f */) { + state.lastIntValue = 0x0C; /* \f */ + state.advance(); + return true + } + if (ch === 0x72 /* r */) { + state.lastIntValue = 0x0D; /* \r */ + state.advance(); + return true + } + return false +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-ControlLetter +pp$9.regexp_eatControlLetter = function(state) { + var ch = state.current(); + if (isControlLetter(ch)) { + state.lastIntValue = ch % 0x20; + state.advance(); + return true + } + return false +}; +function isControlLetter(ch) { + return ( + (ch >= 0x41 /* A */ && ch <= 0x5A /* Z */) || + (ch >= 0x61 /* a */ && ch <= 0x7A /* z */) + ) +} + +// https://www.ecma-international.org/ecma-262/8.0/#prod-RegExpUnicodeEscapeSequence +pp$9.regexp_eatRegExpUnicodeEscapeSequence = function(state) { + var start = state.pos; + + if (state.eat(0x75 /* u */)) { + if (this.regexp_eatFixedHexDigits(state, 4)) { + var lead = state.lastIntValue; + if (state.switchU && lead >= 0xD800 && lead <= 0xDBFF) { + var leadSurrogateEnd = state.pos; + if (state.eat(0x5C /* \ */) && state.eat(0x75 /* u */) && this.regexp_eatFixedHexDigits(state, 4)) { + var trail = state.lastIntValue; + if (trail >= 0xDC00 && trail <= 0xDFFF) { + state.lastIntValue = (lead - 0xD800) * 0x400 + (trail - 0xDC00) + 0x10000; + return true + } + } + state.pos = leadSurrogateEnd; + state.lastIntValue = lead; + } + return true + } + if ( + state.switchU && + state.eat(0x7B /* { */) && + this.regexp_eatHexDigits(state) && + state.eat(0x7D /* } */) && + isValidUnicode(state.lastIntValue) + ) { + return true + } + if (state.switchU) { + state.raise("Invalid unicode escape"); + } + state.pos = start; + } + + return false +}; +function isValidUnicode(ch) { + return ch >= 0 && ch <= 0x10FFFF +} + +// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-IdentityEscape +pp$9.regexp_eatIdentityEscape = function(state) { + if (state.switchU) { + if (this.regexp_eatSyntaxCharacter(state)) { + return true + } + if (state.eat(0x2F /* / */)) { + state.lastIntValue = 0x2F; /* / */ + return true + } + return false + } + + var ch = state.current(); + if (ch !== 0x63 /* c */ && (!state.switchN || ch !== 0x6B /* k */)) { + state.lastIntValue = ch; + state.advance(); + return true + } + + return false +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-DecimalEscape +pp$9.regexp_eatDecimalEscape = function(state) { + state.lastIntValue = 0; + var ch = state.current(); + if (ch >= 0x31 /* 1 */ && ch <= 0x39 /* 9 */) { + do { + state.lastIntValue = 10 * state.lastIntValue + (ch - 0x30 /* 0 */); + state.advance(); + } while ((ch = state.current()) >= 0x30 /* 0 */ && ch <= 0x39 /* 9 */) + return true + } + return false +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-CharacterClassEscape +pp$9.regexp_eatCharacterClassEscape = function(state) { + var ch = state.current(); + + if (isCharacterClassEscape(ch)) { + state.lastIntValue = -1; + state.advance(); + return true + } + + if ( + state.switchU && + this.options.ecmaVersion >= 9 && + (ch === 0x50 /* P */ || ch === 0x70 /* p */) + ) { + state.lastIntValue = -1; + state.advance(); + if ( + state.eat(0x7B /* { */) && + this.regexp_eatUnicodePropertyValueExpression(state) && + state.eat(0x7D /* } */) + ) { + return true + } + state.raise("Invalid property name"); + } + + return false +}; +function isCharacterClassEscape(ch) { + return ( + ch === 0x64 /* d */ || + ch === 0x44 /* D */ || + ch === 0x73 /* s */ || + ch === 0x53 /* S */ || + ch === 0x77 /* w */ || + ch === 0x57 /* W */ + ) +} + +// UnicodePropertyValueExpression :: +// UnicodePropertyName `=` UnicodePropertyValue +// LoneUnicodePropertyNameOrValue +pp$9.regexp_eatUnicodePropertyValueExpression = function(state) { + var start = state.pos; + + // UnicodePropertyName `=` UnicodePropertyValue + if (this.regexp_eatUnicodePropertyName(state) && state.eat(0x3D /* = */)) { + var name = state.lastStringValue; + if (this.regexp_eatUnicodePropertyValue(state)) { + var value = state.lastStringValue; + this.regexp_validateUnicodePropertyNameAndValue(state, name, value); + return true + } + } + state.pos = start; + + // LoneUnicodePropertyNameOrValue + if (this.regexp_eatLoneUnicodePropertyNameOrValue(state)) { + var nameOrValue = state.lastStringValue; + this.regexp_validateUnicodePropertyNameOrValue(state, nameOrValue); + return true + } + return false +}; +pp$9.regexp_validateUnicodePropertyNameAndValue = function(state, name, value) { + if (!data.hasOwnProperty(name) || data[name].indexOf(value) === -1) { + state.raise("Invalid property name"); + } +}; +pp$9.regexp_validateUnicodePropertyNameOrValue = function(state, nameOrValue) { + if (data.$LONE.indexOf(nameOrValue) === -1) { + state.raise("Invalid property name"); + } +}; + +// UnicodePropertyName :: +// UnicodePropertyNameCharacters +pp$9.regexp_eatUnicodePropertyName = function(state) { + var ch = 0; + state.lastStringValue = ""; + while (isUnicodePropertyNameCharacter(ch = state.current())) { + state.lastStringValue += codePointToString$1(ch); + state.advance(); + } + return state.lastStringValue !== "" +}; +function isUnicodePropertyNameCharacter(ch) { + return isControlLetter(ch) || ch === 0x5F /* _ */ +} + +// UnicodePropertyValue :: +// UnicodePropertyValueCharacters +pp$9.regexp_eatUnicodePropertyValue = function(state) { + var ch = 0; + state.lastStringValue = ""; + while (isUnicodePropertyValueCharacter(ch = state.current())) { + state.lastStringValue += codePointToString$1(ch); + state.advance(); + } + return state.lastStringValue !== "" +}; +function isUnicodePropertyValueCharacter(ch) { + return isUnicodePropertyNameCharacter(ch) || isDecimalDigit(ch) +} + +// LoneUnicodePropertyNameOrValue :: +// UnicodePropertyValueCharacters +pp$9.regexp_eatLoneUnicodePropertyNameOrValue = function(state) { + return this.regexp_eatUnicodePropertyValue(state) +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-CharacterClass +pp$9.regexp_eatCharacterClass = function(state) { + if (state.eat(0x5B /* [ */)) { + state.eat(0x5E /* ^ */); + this.regexp_classRanges(state); + if (state.eat(0x5D /* [ */)) { + return true + } + // Unreachable since it threw "unterminated regular expression" error before. + state.raise("Unterminated character class"); + } + return false +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-ClassRanges +// https://www.ecma-international.org/ecma-262/8.0/#prod-NonemptyClassRanges +// https://www.ecma-international.org/ecma-262/8.0/#prod-NonemptyClassRangesNoDash +pp$9.regexp_classRanges = function(state) { + var this$1 = this; + + while (this.regexp_eatClassAtom(state)) { + var left = state.lastIntValue; + if (state.eat(0x2D /* - */) && this$1.regexp_eatClassAtom(state)) { + var right = state.lastIntValue; + if (state.switchU && (left === -1 || right === -1)) { + state.raise("Invalid character class"); + } + if (left !== -1 && right !== -1 && left > right) { + state.raise("Range out of order in character class"); + } + } + } +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-ClassAtom +// https://www.ecma-international.org/ecma-262/8.0/#prod-ClassAtomNoDash +pp$9.regexp_eatClassAtom = function(state) { + var start = state.pos; + + if (state.eat(0x5C /* \ */)) { + if (this.regexp_eatClassEscape(state)) { + return true + } + if (state.switchU) { + // Make the same message as V8. + var ch$1 = state.current(); + if (ch$1 === 0x63 /* c */ || isOctalDigit(ch$1)) { + state.raise("Invalid class escape"); + } + state.raise("Invalid escape"); + } + state.pos = start; + } + + var ch = state.current(); + if (ch !== 0x5D /* [ */) { + state.lastIntValue = ch; + state.advance(); + return true + } + + return false +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-ClassEscape +pp$9.regexp_eatClassEscape = function(state) { + var start = state.pos; + + if (state.eat(0x62 /* b */)) { + state.lastIntValue = 0x08; /* <BS> */ + return true + } + + if (state.switchU && state.eat(0x2D /* - */)) { + state.lastIntValue = 0x2D; /* - */ + return true + } + + if (!state.switchU && state.eat(0x63 /* c */)) { + if (this.regexp_eatClassControlLetter(state)) { + return true + } + state.pos = start; + } + + return ( + this.regexp_eatCharacterClassEscape(state) || + this.regexp_eatCharacterEscape(state) + ) +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-ClassControlLetter +pp$9.regexp_eatClassControlLetter = function(state) { + var ch = state.current(); + if (isDecimalDigit(ch) || ch === 0x5F /* _ */) { + state.lastIntValue = ch % 0x20; + state.advance(); + return true + } + return false +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-HexEscapeSequence +pp$9.regexp_eatHexEscapeSequence = function(state) { + var start = state.pos; + if (state.eat(0x78 /* x */)) { + if (this.regexp_eatFixedHexDigits(state, 2)) { + return true + } + if (state.switchU) { + state.raise("Invalid escape"); + } + state.pos = start; + } + return false +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-DecimalDigits +pp$9.regexp_eatDecimalDigits = function(state) { + var start = state.pos; + var ch = 0; + state.lastIntValue = 0; + while (isDecimalDigit(ch = state.current())) { + state.lastIntValue = 10 * state.lastIntValue + (ch - 0x30 /* 0 */); + state.advance(); + } + return state.pos !== start +}; +function isDecimalDigit(ch) { + return ch >= 0x30 /* 0 */ && ch <= 0x39 /* 9 */ +} + +// https://www.ecma-international.org/ecma-262/8.0/#prod-HexDigits +pp$9.regexp_eatHexDigits = function(state) { + var start = state.pos; + var ch = 0; + state.lastIntValue = 0; + while (isHexDigit(ch = state.current())) { + state.lastIntValue = 16 * state.lastIntValue + hexToInt(ch); + state.advance(); + } + return state.pos !== start +}; +function isHexDigit(ch) { + return ( + (ch >= 0x30 /* 0 */ && ch <= 0x39 /* 9 */) || + (ch >= 0x41 /* A */ && ch <= 0x46 /* F */) || + (ch >= 0x61 /* a */ && ch <= 0x66 /* f */) + ) +} +function hexToInt(ch) { + if (ch >= 0x41 /* A */ && ch <= 0x46 /* F */) { + return 10 + (ch - 0x41 /* A */) + } + if (ch >= 0x61 /* a */ && ch <= 0x66 /* f */) { + return 10 + (ch - 0x61 /* a */) + } + return ch - 0x30 /* 0 */ +} + +// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-LegacyOctalEscapeSequence +// Allows only 0-377(octal) i.e. 0-255(decimal). +pp$9.regexp_eatLegacyOctalEscapeSequence = function(state) { + if (this.regexp_eatOctalDigit(state)) { + var n1 = state.lastIntValue; + if (this.regexp_eatOctalDigit(state)) { + var n2 = state.lastIntValue; + if (n1 <= 3 && this.regexp_eatOctalDigit(state)) { + state.lastIntValue = n1 * 64 + n2 * 8 + state.lastIntValue; + } else { + state.lastIntValue = n1 * 8 + n2; + } + } else { + state.lastIntValue = n1; + } + return true + } + return false +}; + +// https://www.ecma-international.org/ecma-262/8.0/#prod-OctalDigit +pp$9.regexp_eatOctalDigit = function(state) { + var ch = state.current(); + if (isOctalDigit(ch)) { + state.lastIntValue = ch - 0x30; /* 0 */ + state.advance(); + return true + } + state.lastIntValue = 0; + return false +}; +function isOctalDigit(ch) { + return ch >= 0x30 /* 0 */ && ch <= 0x37 /* 7 */ +} + +// https://www.ecma-international.org/ecma-262/8.0/#prod-Hex4Digits +// https://www.ecma-international.org/ecma-262/8.0/#prod-HexDigit +// And HexDigit HexDigit in https://www.ecma-international.org/ecma-262/8.0/#prod-HexEscapeSequence +pp$9.regexp_eatFixedHexDigits = function(state, length) { + var start = state.pos; + state.lastIntValue = 0; + for (var i = 0; i < length; ++i) { + var ch = state.current(); + if (!isHexDigit(ch)) { + state.pos = start; + return false + } + state.lastIntValue = 16 * state.lastIntValue + hexToInt(ch); + state.advance(); + } + return true +}; + +// Object type used to represent tokens. Note that normally, tokens +// simply exist as properties on the parser object. This is only +// used for the onToken callback and the external tokenizer. + +var Token = function Token(p) { + this.type = p.type; + this.value = p.value; + this.start = p.start; + this.end = p.end; + if (p.options.locations) + { this.loc = new SourceLocation(p, p.startLoc, p.endLoc); } + if (p.options.ranges) + { this.range = [p.start, p.end]; } +}; + +// ## Tokenizer + +var pp$8 = Parser.prototype; + +// Move to the next token + +pp$8.next = function() { + if (this.options.onToken) + { this.options.onToken(new Token(this)); } + + this.lastTokEnd = this.end; + this.lastTokStart = this.start; + this.lastTokEndLoc = this.endLoc; + this.lastTokStartLoc = this.startLoc; + this.nextToken(); +}; + +pp$8.getToken = function() { + this.next(); + return new Token(this) +}; + +// If we're in an ES6 environment, make parsers iterable +if (typeof Symbol !== "undefined") + { pp$8[Symbol.iterator] = function() { + var this$1 = this; + + return { + next: function () { + var token = this$1.getToken(); + return { + done: token.type === types.eof, + value: token + } + } + } + }; } + +// Toggle strict mode. Re-reads the next number or string to please +// pedantic tests (`"use strict"; 010;` should fail). + +pp$8.curContext = function() { + return this.context[this.context.length - 1] +}; + +// Read a single token, updating the parser object's token-related +// properties. + +pp$8.nextToken = function() { + var curContext = this.curContext(); + if (!curContext || !curContext.preserveSpace) { this.skipSpace(); } + + this.start = this.pos; + if (this.options.locations) { this.startLoc = this.curPosition(); } + if (this.pos >= this.input.length) { return this.finishToken(types.eof) } + + if (curContext.override) { return curContext.override(this) } + else { this.readToken(this.fullCharCodeAtPos()); } +}; + +pp$8.readToken = function(code) { + // Identifier or keyword. '\uXXXX' sequences are allowed in + // identifiers, so '\' also dispatches to that. + if (isIdentifierStart(code, this.options.ecmaVersion >= 6) || code === 92 /* '\' */) + { return this.readWord() } + + return this.getTokenFromCode(code) +}; + +pp$8.fullCharCodeAtPos = function() { + var code = this.input.charCodeAt(this.pos); + if (code <= 0xd7ff || code >= 0xe000) { return code } + var next = this.input.charCodeAt(this.pos + 1); + return (code << 10) + next - 0x35fdc00 +}; + +pp$8.skipBlockComment = function() { + var this$1 = this; + + var startLoc = this.options.onComment && this.curPosition(); + var start = this.pos, end = this.input.indexOf("*/", this.pos += 2); + if (end === -1) { this.raise(this.pos - 2, "Unterminated comment"); } + this.pos = end + 2; + if (this.options.locations) { + lineBreakG.lastIndex = start; + var match; + while ((match = lineBreakG.exec(this.input)) && match.index < this.pos) { + ++this$1.curLine; + this$1.lineStart = match.index + match[0].length; + } + } + if (this.options.onComment) + { this.options.onComment(true, this.input.slice(start + 2, end), start, this.pos, + startLoc, this.curPosition()); } +}; + +pp$8.skipLineComment = function(startSkip) { + var this$1 = this; + + var start = this.pos; + var startLoc = this.options.onComment && this.curPosition(); + var ch = this.input.charCodeAt(this.pos += startSkip); + while (this.pos < this.input.length && !isNewLine(ch)) { + ch = this$1.input.charCodeAt(++this$1.pos); + } + if (this.options.onComment) + { this.options.onComment(false, this.input.slice(start + startSkip, this.pos), start, this.pos, + startLoc, this.curPosition()); } +}; + +// Called at the start of the parse and after every token. Skips +// whitespace and comments, and. + +pp$8.skipSpace = function() { + var this$1 = this; + + loop: while (this.pos < this.input.length) { + var ch = this$1.input.charCodeAt(this$1.pos); + switch (ch) { + case 32: case 160: // ' ' + ++this$1.pos; + break + case 13: + if (this$1.input.charCodeAt(this$1.pos + 1) === 10) { + ++this$1.pos; + } + case 10: case 8232: case 8233: + ++this$1.pos; + if (this$1.options.locations) { + ++this$1.curLine; + this$1.lineStart = this$1.pos; + } + break + case 47: // '/' + switch (this$1.input.charCodeAt(this$1.pos + 1)) { + case 42: // '*' + this$1.skipBlockComment(); + break + case 47: + this$1.skipLineComment(2); + break + default: + break loop + } + break + default: + if (ch > 8 && ch < 14 || ch >= 5760 && nonASCIIwhitespace.test(String.fromCharCode(ch))) { + ++this$1.pos; + } else { + break loop + } + } + } +}; + +// Called at the end of every token. Sets `end`, `val`, and +// maintains `context` and `exprAllowed`, and skips the space after +// the token, so that the next one's `start` will point at the +// right position. + +pp$8.finishToken = function(type, val) { + this.end = this.pos; + if (this.options.locations) { this.endLoc = this.curPosition(); } + var prevType = this.type; + this.type = type; + this.value = val; + + this.updateContext(prevType); +}; + +// ### Token reading + +// This is the function that is called to fetch the next token. It +// is somewhat obscure, because it works in character codes rather +// than characters, and because operator parsing has been inlined +// into it. +// +// All in the name of speed. +// +pp$8.readToken_dot = function() { + var next = this.input.charCodeAt(this.pos + 1); + if (next >= 48 && next <= 57) { return this.readNumber(true) } + var next2 = this.input.charCodeAt(this.pos + 2); + if (this.options.ecmaVersion >= 6 && next === 46 && next2 === 46) { // 46 = dot '.' + this.pos += 3; + return this.finishToken(types.ellipsis) + } else { + ++this.pos; + return this.finishToken(types.dot) + } +}; + +pp$8.readToken_slash = function() { // '/' + var next = this.input.charCodeAt(this.pos + 1); + if (this.exprAllowed) { ++this.pos; return this.readRegexp() } + if (next === 61) { return this.finishOp(types.assign, 2) } + return this.finishOp(types.slash, 1) +}; + +pp$8.readToken_mult_modulo_exp = function(code) { // '%*' + var next = this.input.charCodeAt(this.pos + 1); + var size = 1; + var tokentype = code === 42 ? types.star : types.modulo; + + // exponentiation operator ** and **= + if (this.options.ecmaVersion >= 7 && code === 42 && next === 42) { + ++size; + tokentype = types.starstar; + next = this.input.charCodeAt(this.pos + 2); + } + + if (next === 61) { return this.finishOp(types.assign, size + 1) } + return this.finishOp(tokentype, size) +}; + +pp$8.readToken_pipe_amp = function(code) { // '|&' + var next = this.input.charCodeAt(this.pos + 1); + if (next === code) { return this.finishOp(code === 124 ? types.logicalOR : types.logicalAND, 2) } + if (next === 61) { return this.finishOp(types.assign, 2) } + return this.finishOp(code === 124 ? types.bitwiseOR : types.bitwiseAND, 1) +}; + +pp$8.readToken_caret = function() { // '^' + var next = this.input.charCodeAt(this.pos + 1); + if (next === 61) { return this.finishOp(types.assign, 2) } + return this.finishOp(types.bitwiseXOR, 1) +}; + +pp$8.readToken_plus_min = function(code) { // '+-' + var next = this.input.charCodeAt(this.pos + 1); + if (next === code) { + if (next === 45 && !this.inModule && this.input.charCodeAt(this.pos + 2) === 62 && + (this.lastTokEnd === 0 || lineBreak.test(this.input.slice(this.lastTokEnd, this.pos)))) { + // A `-->` line comment + this.skipLineComment(3); + this.skipSpace(); + return this.nextToken() + } + return this.finishOp(types.incDec, 2) + } + if (next === 61) { return this.finishOp(types.assign, 2) } + return this.finishOp(types.plusMin, 1) +}; + +pp$8.readToken_lt_gt = function(code) { // '<>' + var next = this.input.charCodeAt(this.pos + 1); + var size = 1; + if (next === code) { + size = code === 62 && this.input.charCodeAt(this.pos + 2) === 62 ? 3 : 2; + if (this.input.charCodeAt(this.pos + size) === 61) { return this.finishOp(types.assign, size + 1) } + return this.finishOp(types.bitShift, size) + } + if (next === 33 && code === 60 && !this.inModule && this.input.charCodeAt(this.pos + 2) === 45 && + this.input.charCodeAt(this.pos + 3) === 45) { + // `<!--`, an XML-style comment that should be interpreted as a line comment + this.skipLineComment(4); + this.skipSpace(); + return this.nextToken() + } + if (next === 61) { size = 2; } + return this.finishOp(types.relational, size) +}; + +pp$8.readToken_eq_excl = function(code) { // '=!' + var next = this.input.charCodeAt(this.pos + 1); + if (next === 61) { return this.finishOp(types.equality, this.input.charCodeAt(this.pos + 2) === 61 ? 3 : 2) } + if (code === 61 && next === 62 && this.options.ecmaVersion >= 6) { // '=>' + this.pos += 2; + return this.finishToken(types.arrow) + } + return this.finishOp(code === 61 ? types.eq : types.prefix, 1) +}; + +pp$8.getTokenFromCode = function(code) { + switch (code) { + // The interpretation of a dot depends on whether it is followed + // by a digit or another two dots. + case 46: // '.' + return this.readToken_dot() + + // Punctuation tokens. + case 40: ++this.pos; return this.finishToken(types.parenL) + case 41: ++this.pos; return this.finishToken(types.parenR) + case 59: ++this.pos; return this.finishToken(types.semi) + case 44: ++this.pos; return this.finishToken(types.comma) + case 91: ++this.pos; return this.finishToken(types.bracketL) + case 93: ++this.pos; return this.finishToken(types.bracketR) + case 123: ++this.pos; return this.finishToken(types.braceL) + case 125: ++this.pos; return this.finishToken(types.braceR) + case 58: ++this.pos; return this.finishToken(types.colon) + case 63: ++this.pos; return this.finishToken(types.question) + + case 96: // '`' + if (this.options.ecmaVersion < 6) { break } + ++this.pos; + return this.finishToken(types.backQuote) + + case 48: // '0' + var next = this.input.charCodeAt(this.pos + 1); + if (next === 120 || next === 88) { return this.readRadixNumber(16) } // '0x', '0X' - hex number + if (this.options.ecmaVersion >= 6) { + if (next === 111 || next === 79) { return this.readRadixNumber(8) } // '0o', '0O' - octal number + if (next === 98 || next === 66) { return this.readRadixNumber(2) } // '0b', '0B' - binary number + } + + // Anything else beginning with a digit is an integer, octal + // number, or float. + case 49: case 50: case 51: case 52: case 53: case 54: case 55: case 56: case 57: // 1-9 + return this.readNumber(false) + + // Quotes produce strings. + case 34: case 39: // '"', "'" + return this.readString(code) + + // Operators are parsed inline in tiny state machines. '=' (61) is + // often referred to. `finishOp` simply skips the amount of + // characters it is given as second argument, and returns a token + // of the type given by its first argument. + + case 47: // '/' + return this.readToken_slash() + + case 37: case 42: // '%*' + return this.readToken_mult_modulo_exp(code) + + case 124: case 38: // '|&' + return this.readToken_pipe_amp(code) + + case 94: // '^' + return this.readToken_caret() + + case 43: case 45: // '+-' + return this.readToken_plus_min(code) + + case 60: case 62: // '<>' + return this.readToken_lt_gt(code) + + case 61: case 33: // '=!' + return this.readToken_eq_excl(code) + + case 126: // '~' + return this.finishOp(types.prefix, 1) + } + + this.raise(this.pos, "Unexpected character '" + codePointToString(code) + "'"); +}; + +pp$8.finishOp = function(type, size) { + var str = this.input.slice(this.pos, this.pos + size); + this.pos += size; + return this.finishToken(type, str) +}; + +pp$8.readRegexp = function() { + var this$1 = this; + + var escaped, inClass, start = this.pos; + for (;;) { + if (this$1.pos >= this$1.input.length) { this$1.raise(start, "Unterminated regular expression"); } + var ch = this$1.input.charAt(this$1.pos); + if (lineBreak.test(ch)) { this$1.raise(start, "Unterminated regular expression"); } + if (!escaped) { + if (ch === "[") { inClass = true; } + else if (ch === "]" && inClass) { inClass = false; } + else if (ch === "/" && !inClass) { break } + escaped = ch === "\\"; + } else { escaped = false; } + ++this$1.pos; + } + var pattern = this.input.slice(start, this.pos); + ++this.pos; + var flagsStart = this.pos; + var flags = this.readWord1(); + if (this.containsEsc) { this.unexpected(flagsStart); } + + // Validate pattern + var state = this.regexpState || (this.regexpState = new RegExpValidationState(this)); + state.reset(start, pattern, flags); + this.validateRegExpFlags(state); + this.validateRegExpPattern(state); + + // Create Literal#value property value. + var value = null; + try { + value = new RegExp(pattern, flags); + } catch (e) { + // ESTree requires null if it failed to instantiate RegExp object. + // https://github.com/estree/estree/blob/a27003adf4fd7bfad44de9cef372a2eacd527b1c/es5.md#regexpliteral + } + + return this.finishToken(types.regexp, {pattern: pattern, flags: flags, value: value}) +}; + +// Read an integer in the given radix. Return null if zero digits +// were read, the integer value otherwise. When `len` is given, this +// will return `null` unless the integer has exactly `len` digits. + +pp$8.readInt = function(radix, len) { + var this$1 = this; + + var start = this.pos, total = 0; + for (var i = 0, e = len == null ? Infinity : len; i < e; ++i) { + var code = this$1.input.charCodeAt(this$1.pos), val = (void 0); + if (code >= 97) { val = code - 97 + 10; } // a + else if (code >= 65) { val = code - 65 + 10; } // A + else if (code >= 48 && code <= 57) { val = code - 48; } // 0-9 + else { val = Infinity; } + if (val >= radix) { break } + ++this$1.pos; + total = total * radix + val; + } + if (this.pos === start || len != null && this.pos - start !== len) { return null } + + return total +}; + +pp$8.readRadixNumber = function(radix) { + this.pos += 2; // 0x + var val = this.readInt(radix); + if (val == null) { this.raise(this.start + 2, "Expected number in radix " + radix); } + if (isIdentifierStart(this.fullCharCodeAtPos())) { this.raise(this.pos, "Identifier directly after number"); } + return this.finishToken(types.num, val) +}; + +// Read an integer, octal integer, or floating-point number. + +pp$8.readNumber = function(startsWithDot) { + var start = this.pos; + if (!startsWithDot && this.readInt(10) === null) { this.raise(start, "Invalid number"); } + var octal = this.pos - start >= 2 && this.input.charCodeAt(start) === 48; + if (octal && this.strict) { this.raise(start, "Invalid number"); } + if (octal && /[89]/.test(this.input.slice(start, this.pos))) { octal = false; } + var next = this.input.charCodeAt(this.pos); + if (next === 46 && !octal) { // '.' + ++this.pos; + this.readInt(10); + next = this.input.charCodeAt(this.pos); + } + if ((next === 69 || next === 101) && !octal) { // 'eE' + next = this.input.charCodeAt(++this.pos); + if (next === 43 || next === 45) { ++this.pos; } // '+-' + if (this.readInt(10) === null) { this.raise(start, "Invalid number"); } + } + if (isIdentifierStart(this.fullCharCodeAtPos())) { this.raise(this.pos, "Identifier directly after number"); } + + var str = this.input.slice(start, this.pos); + var val = octal ? parseInt(str, 8) : parseFloat(str); + return this.finishToken(types.num, val) +}; + +// Read a string value, interpreting backslash-escapes. + +pp$8.readCodePoint = function() { + var ch = this.input.charCodeAt(this.pos), code; + + if (ch === 123) { // '{' + if (this.options.ecmaVersion < 6) { this.unexpected(); } + var codePos = ++this.pos; + code = this.readHexChar(this.input.indexOf("}", this.pos) - this.pos); + ++this.pos; + if (code > 0x10FFFF) { this.invalidStringToken(codePos, "Code point out of bounds"); } + } else { + code = this.readHexChar(4); + } + return code +}; + +function codePointToString(code) { + // UTF-16 Decoding + if (code <= 0xFFFF) { return String.fromCharCode(code) } + code -= 0x10000; + return String.fromCharCode((code >> 10) + 0xD800, (code & 1023) + 0xDC00) +} + +pp$8.readString = function(quote) { + var this$1 = this; + + var out = "", chunkStart = ++this.pos; + for (;;) { + if (this$1.pos >= this$1.input.length) { this$1.raise(this$1.start, "Unterminated string constant"); } + var ch = this$1.input.charCodeAt(this$1.pos); + if (ch === quote) { break } + if (ch === 92) { // '\' + out += this$1.input.slice(chunkStart, this$1.pos); + out += this$1.readEscapedChar(false); + chunkStart = this$1.pos; + } else { + if (isNewLine(ch, this$1.options.ecmaVersion >= 10)) { this$1.raise(this$1.start, "Unterminated string constant"); } + ++this$1.pos; + } + } + out += this.input.slice(chunkStart, this.pos++); + return this.finishToken(types.string, out) +}; + +// Reads template string tokens. + +var INVALID_TEMPLATE_ESCAPE_ERROR = {}; + +pp$8.tryReadTemplateToken = function() { + this.inTemplateElement = true; + try { + this.readTmplToken(); + } catch (err) { + if (err === INVALID_TEMPLATE_ESCAPE_ERROR) { + this.readInvalidTemplateToken(); + } else { + throw err + } + } + + this.inTemplateElement = false; +}; + +pp$8.invalidStringToken = function(position, message) { + if (this.inTemplateElement && this.options.ecmaVersion >= 9) { + throw INVALID_TEMPLATE_ESCAPE_ERROR + } else { + this.raise(position, message); + } +}; + +pp$8.readTmplToken = function() { + var this$1 = this; + + var out = "", chunkStart = this.pos; + for (;;) { + if (this$1.pos >= this$1.input.length) { this$1.raise(this$1.start, "Unterminated template"); } + var ch = this$1.input.charCodeAt(this$1.pos); + if (ch === 96 || ch === 36 && this$1.input.charCodeAt(this$1.pos + 1) === 123) { // '`', '${' + if (this$1.pos === this$1.start && (this$1.type === types.template || this$1.type === types.invalidTemplate)) { + if (ch === 36) { + this$1.pos += 2; + return this$1.finishToken(types.dollarBraceL) + } else { + ++this$1.pos; + return this$1.finishToken(types.backQuote) + } + } + out += this$1.input.slice(chunkStart, this$1.pos); + return this$1.finishToken(types.template, out) + } + if (ch === 92) { // '\' + out += this$1.input.slice(chunkStart, this$1.pos); + out += this$1.readEscapedChar(true); + chunkStart = this$1.pos; + } else if (isNewLine(ch)) { + out += this$1.input.slice(chunkStart, this$1.pos); + ++this$1.pos; + switch (ch) { + case 13: + if (this$1.input.charCodeAt(this$1.pos) === 10) { ++this$1.pos; } + case 10: + out += "\n"; + break + default: + out += String.fromCharCode(ch); + break + } + if (this$1.options.locations) { + ++this$1.curLine; + this$1.lineStart = this$1.pos; + } + chunkStart = this$1.pos; + } else { + ++this$1.pos; + } + } +}; + +// Reads a template token to search for the end, without validating any escape sequences +pp$8.readInvalidTemplateToken = function() { + var this$1 = this; + + for (; this.pos < this.input.length; this.pos++) { + switch (this$1.input[this$1.pos]) { + case "\\": + ++this$1.pos; + break + + case "$": + if (this$1.input[this$1.pos + 1] !== "{") { + break + } + // falls through + + case "`": + return this$1.finishToken(types.invalidTemplate, this$1.input.slice(this$1.start, this$1.pos)) + + // no default + } + } + this.raise(this.start, "Unterminated template"); +}; + +// Used to read escaped characters + +pp$8.readEscapedChar = function(inTemplate) { + var ch = this.input.charCodeAt(++this.pos); + ++this.pos; + switch (ch) { + case 110: return "\n" // 'n' -> '\n' + case 114: return "\r" // 'r' -> '\r' + case 120: return String.fromCharCode(this.readHexChar(2)) // 'x' + case 117: return codePointToString(this.readCodePoint()) // 'u' + case 116: return "\t" // 't' -> '\t' + case 98: return "\b" // 'b' -> '\b' + case 118: return "\u000b" // 'v' -> '\u000b' + case 102: return "\f" // 'f' -> '\f' + case 13: if (this.input.charCodeAt(this.pos) === 10) { ++this.pos; } // '\r\n' + case 10: // ' \n' + if (this.options.locations) { this.lineStart = this.pos; ++this.curLine; } + return "" + default: + if (ch >= 48 && ch <= 55) { + var octalStr = this.input.substr(this.pos - 1, 3).match(/^[0-7]+/)[0]; + var octal = parseInt(octalStr, 8); + if (octal > 255) { + octalStr = octalStr.slice(0, -1); + octal = parseInt(octalStr, 8); + } + this.pos += octalStr.length - 1; + ch = this.input.charCodeAt(this.pos); + if ((octalStr !== "0" || ch === 56 || ch === 57) && (this.strict || inTemplate)) { + this.invalidStringToken( + this.pos - 1 - octalStr.length, + inTemplate + ? "Octal literal in template string" + : "Octal literal in strict mode" + ); + } + return String.fromCharCode(octal) + } + return String.fromCharCode(ch) + } +}; + +// Used to read character escape sequences ('\x', '\u', '\U'). + +pp$8.readHexChar = function(len) { + var codePos = this.pos; + var n = this.readInt(16, len); + if (n === null) { this.invalidStringToken(codePos, "Bad character escape sequence"); } + return n +}; + +// Read an identifier, and return it as a string. Sets `this.containsEsc` +// to whether the word contained a '\u' escape. +// +// Incrementally adds only escaped chars, adding other chunks as-is +// as a micro-optimization. + +pp$8.readWord1 = function() { + var this$1 = this; + + this.containsEsc = false; + var word = "", first = true, chunkStart = this.pos; + var astral = this.options.ecmaVersion >= 6; + while (this.pos < this.input.length) { + var ch = this$1.fullCharCodeAtPos(); + if (isIdentifierChar(ch, astral)) { + this$1.pos += ch <= 0xffff ? 1 : 2; + } else if (ch === 92) { // "\" + this$1.containsEsc = true; + word += this$1.input.slice(chunkStart, this$1.pos); + var escStart = this$1.pos; + if (this$1.input.charCodeAt(++this$1.pos) !== 117) // "u" + { this$1.invalidStringToken(this$1.pos, "Expecting Unicode escape sequence \\uXXXX"); } + ++this$1.pos; + var esc = this$1.readCodePoint(); + if (!(first ? isIdentifierStart : isIdentifierChar)(esc, astral)) + { this$1.invalidStringToken(escStart, "Invalid Unicode escape"); } + word += codePointToString(esc); + chunkStart = this$1.pos; + } else { + break + } + first = false; + } + return word + this.input.slice(chunkStart, this.pos) +}; + +// Read an identifier or keyword token. Will check for reserved +// words when necessary. + +pp$8.readWord = function() { + var word = this.readWord1(); + var type = types.name; + if (this.keywords.test(word)) { + if (this.containsEsc) { this.raiseRecoverable(this.start, "Escape sequence in keyword " + word); } + type = keywords$1[word]; + } + return this.finishToken(type, word) +}; + +// Acorn is a tiny, fast JavaScript parser written in JavaScript. +// +// Acorn was written by Marijn Haverbeke, Ingvar Stepanyan, and +// various contributors and released under an MIT license. +// +// Git repositories for Acorn are available at +// +// http://marijnhaverbeke.nl/git/acorn +// https://github.com/acornjs/acorn.git +// +// Please use the [github bug tracker][ghbt] to report issues. +// +// [ghbt]: https://github.com/acornjs/acorn/issues +// +// This file defines the main parser interface. The library also comes +// with a [error-tolerant parser][dammit] and an +// [abstract syntax tree walker][walk], defined in other files. +// +// [dammit]: acorn_loose.js +// [walk]: util/walk.js + +var version = "5.7.3"; + +// The main exported interface (under `self.acorn` when in the +// browser) is a `parse` function that takes a code string and +// returns an abstract syntax tree as specified by [Mozilla parser +// API][api]. +// +// [api]: https://developer.mozilla.org/en-US/docs/SpiderMonkey/Parser_API + +function parse(input, options) { + return new Parser(options, input).parse() +} + +// This function tries to parse a single expression at a given +// offset in a string. Useful for parsing mixed-language formats +// that embed JavaScript expressions. + +function parseExpressionAt(input, pos, options) { + var p = new Parser(options, input, pos); + p.nextToken(); + return p.parseExpression() +} + +// Acorn is organized as a tokenizer and a recursive-descent parser. +// The `tokenizer` export provides an interface to the tokenizer. + +function tokenizer(input, options) { + return new Parser(options, input) +} + +// This is a terrible kludge to support the existing, pre-ES6 +// interface where the loose parser module retroactively adds exports +// to this module. + // eslint-disable-line camelcase +function addLooseExports(parse, Parser$$1, plugins$$1) { + exports.parse_dammit = parse; // eslint-disable-line camelcase + exports.LooseParser = Parser$$1; + exports.pluginsLoose = plugins$$1; +} + +exports.version = version; +exports.parse = parse; +exports.parseExpressionAt = parseExpressionAt; +exports.tokenizer = tokenizer; +exports.addLooseExports = addLooseExports; +exports.Parser = Parser; +exports.plugins = plugins; +exports.defaultOptions = defaultOptions; +exports.Position = Position; +exports.SourceLocation = SourceLocation; +exports.getLineInfo = getLineInfo; +exports.Node = Node; +exports.TokenType = TokenType; +exports.tokTypes = types; +exports.keywordTypes = keywords$1; +exports.TokContext = TokContext; +exports.tokContexts = types$1; +exports.isIdentifierChar = isIdentifierChar; +exports.isIdentifierStart = isIdentifierStart; +exports.Token = Token; +exports.isNewLine = isNewLine; +exports.lineBreak = lineBreak; +exports.lineBreakG = lineBreakG; +exports.nonASCIIwhitespace = nonASCIIwhitespace; + +Object.defineProperty(exports, '__esModule', { value: true }); + +}))); diff --git a/node_modules/acorn/dist/acorn_loose.es.js b/node_modules/acorn/dist/acorn_loose.es.js new file mode 100644 index 00000000..89d38a1c --- /dev/null +++ b/node_modules/acorn/dist/acorn_loose.es.js @@ -0,0 +1,1424 @@ +import { Node, SourceLocation, Token, addLooseExports, defaultOptions, getLineInfo, isNewLine, lineBreak, lineBreakG, tokTypes, tokenizer } from './acorn.es'; + +function noop() {} + +// Registered plugins +var pluginsLoose = {}; + +var LooseParser = function LooseParser(input, options) { + if ( options === void 0 ) options = {}; + + this.toks = tokenizer(input, options); + this.options = this.toks.options; + this.input = this.toks.input; + this.tok = this.last = {type: tokTypes.eof, start: 0, end: 0}; + this.tok.validateRegExpFlags = noop; + this.tok.validateRegExpPattern = noop; + if (this.options.locations) { + var here = this.toks.curPosition(); + this.tok.loc = new SourceLocation(this.toks, here, here); + } + this.ahead = []; // Tokens ahead + this.context = []; // Indentation contexted + this.curIndent = 0; + this.curLineStart = 0; + this.nextLineStart = this.lineEnd(this.curLineStart) + 1; + this.inAsync = false; + this.inFunction = false; + // Load plugins + this.options.pluginsLoose = options.pluginsLoose || {}; + this.loadPlugins(this.options.pluginsLoose); +}; + +LooseParser.prototype.startNode = function startNode () { + return new Node(this.toks, this.tok.start, this.options.locations ? this.tok.loc.start : null) +}; + +LooseParser.prototype.storeCurrentPos = function storeCurrentPos () { + return this.options.locations ? [this.tok.start, this.tok.loc.start] : this.tok.start +}; + +LooseParser.prototype.startNodeAt = function startNodeAt (pos) { + if (this.options.locations) { + return new Node(this.toks, pos[0], pos[1]) + } else { + return new Node(this.toks, pos) + } +}; + +LooseParser.prototype.finishNode = function finishNode (node, type) { + node.type = type; + node.end = this.last.end; + if (this.options.locations) + { node.loc.end = this.last.loc.end; } + if (this.options.ranges) + { node.range[1] = this.last.end; } + return node +}; + +LooseParser.prototype.dummyNode = function dummyNode (type) { + var dummy = this.startNode(); + dummy.type = type; + dummy.end = dummy.start; + if (this.options.locations) + { dummy.loc.end = dummy.loc.start; } + if (this.options.ranges) + { dummy.range[1] = dummy.start; } + this.last = {type: tokTypes.name, start: dummy.start, end: dummy.start, loc: dummy.loc}; + return dummy +}; + +LooseParser.prototype.dummyIdent = function dummyIdent () { + var dummy = this.dummyNode("Identifier"); + dummy.name = "✖"; + return dummy +}; + +LooseParser.prototype.dummyString = function dummyString () { + var dummy = this.dummyNode("Literal"); + dummy.value = dummy.raw = "✖"; + return dummy +}; + +LooseParser.prototype.eat = function eat (type) { + if (this.tok.type === type) { + this.next(); + return true + } else { + return false + } +}; + +LooseParser.prototype.isContextual = function isContextual (name) { + return this.tok.type === tokTypes.name && this.tok.value === name +}; + +LooseParser.prototype.eatContextual = function eatContextual (name) { + return this.tok.value === name && this.eat(tokTypes.name) +}; + +LooseParser.prototype.canInsertSemicolon = function canInsertSemicolon () { + return this.tok.type === tokTypes.eof || this.tok.type === tokTypes.braceR || + lineBreak.test(this.input.slice(this.last.end, this.tok.start)) +}; + +LooseParser.prototype.semicolon = function semicolon () { + return this.eat(tokTypes.semi) +}; + +LooseParser.prototype.expect = function expect (type) { + var this$1 = this; + + if (this.eat(type)) { return true } + for (var i = 1; i <= 2; i++) { + if (this$1.lookAhead(i).type === type) { + for (var j = 0; j < i; j++) { this$1.next(); } + return true + } + } +}; + +LooseParser.prototype.pushCx = function pushCx () { + this.context.push(this.curIndent); +}; + +LooseParser.prototype.popCx = function popCx () { + this.curIndent = this.context.pop(); +}; + +LooseParser.prototype.lineEnd = function lineEnd (pos) { + while (pos < this.input.length && !isNewLine(this.input.charCodeAt(pos))) { ++pos; } + return pos +}; + +LooseParser.prototype.indentationAfter = function indentationAfter (pos) { + var this$1 = this; + + for (var count = 0;; ++pos) { + var ch = this$1.input.charCodeAt(pos); + if (ch === 32) { ++count; } + else if (ch === 9) { count += this$1.options.tabSize; } + else { return count } + } +}; + +LooseParser.prototype.closes = function closes (closeTok, indent, line, blockHeuristic) { + if (this.tok.type === closeTok || this.tok.type === tokTypes.eof) { return true } + return line !== this.curLineStart && this.curIndent < indent && this.tokenStartsLine() && + (!blockHeuristic || this.nextLineStart >= this.input.length || + this.indentationAfter(this.nextLineStart) < indent) +}; + +LooseParser.prototype.tokenStartsLine = function tokenStartsLine () { + var this$1 = this; + + for (var p = this.tok.start - 1; p >= this.curLineStart; --p) { + var ch = this$1.input.charCodeAt(p); + if (ch !== 9 && ch !== 32) { return false } + } + return true +}; + +LooseParser.prototype.extend = function extend (name, f) { + this[name] = f(this[name]); +}; + +LooseParser.prototype.loadPlugins = function loadPlugins (pluginConfigs) { + var this$1 = this; + + for (var name in pluginConfigs) { + var plugin = pluginsLoose[name]; + if (!plugin) { throw new Error("Plugin '" + name + "' not found") } + plugin(this$1, pluginConfigs[name]); + } +}; + +LooseParser.prototype.parse = function parse () { + this.next(); + return this.parseTopLevel() +}; + +var lp = LooseParser.prototype; + +function isSpace(ch) { + return (ch < 14 && ch > 8) || ch === 32 || ch === 160 || isNewLine(ch) +} + +lp.next = function() { + var this$1 = this; + + this.last = this.tok; + if (this.ahead.length) + { this.tok = this.ahead.shift(); } + else + { this.tok = this.readToken(); } + + if (this.tok.start >= this.nextLineStart) { + while (this.tok.start >= this.nextLineStart) { + this$1.curLineStart = this$1.nextLineStart; + this$1.nextLineStart = this$1.lineEnd(this$1.curLineStart) + 1; + } + this.curIndent = this.indentationAfter(this.curLineStart); + } +}; + +lp.readToken = function() { + var this$1 = this; + + for (;;) { + try { + this$1.toks.next(); + if (this$1.toks.type === tokTypes.dot && + this$1.input.substr(this$1.toks.end, 1) === "." && + this$1.options.ecmaVersion >= 6) { + this$1.toks.end++; + this$1.toks.type = tokTypes.ellipsis; + } + return new Token(this$1.toks) + } catch (e) { + if (!(e instanceof SyntaxError)) { throw e } + + // Try to skip some text, based on the error message, and then continue + var msg = e.message, pos = e.raisedAt, replace = true; + if (/unterminated/i.test(msg)) { + pos = this$1.lineEnd(e.pos + 1); + if (/string/.test(msg)) { + replace = {start: e.pos, end: pos, type: tokTypes.string, value: this$1.input.slice(e.pos + 1, pos)}; + } else if (/regular expr/i.test(msg)) { + var re = this$1.input.slice(e.pos, pos); + try { re = new RegExp(re); } catch (e) { /* ignore compilation error due to new syntax */ } + replace = {start: e.pos, end: pos, type: tokTypes.regexp, value: re}; + } else if (/template/.test(msg)) { + replace = { + start: e.pos, + end: pos, + type: tokTypes.template, + value: this$1.input.slice(e.pos, pos) + }; + } else { + replace = false; + } + } else if (/invalid (unicode|regexp|number)|expecting unicode|octal literal|is reserved|directly after number|expected number in radix/i.test(msg)) { + while (pos < this.input.length && !isSpace(this.input.charCodeAt(pos))) { ++pos; } + } else if (/character escape|expected hexadecimal/i.test(msg)) { + while (pos < this.input.length) { + var ch = this$1.input.charCodeAt(pos++); + if (ch === 34 || ch === 39 || isNewLine(ch)) { break } + } + } else if (/unexpected character/i.test(msg)) { + pos++; + replace = false; + } else if (/regular expression/i.test(msg)) { + replace = true; + } else { + throw e + } + this$1.resetTo(pos); + if (replace === true) { replace = {start: pos, end: pos, type: tokTypes.name, value: "✖"}; } + if (replace) { + if (this$1.options.locations) + { replace.loc = new SourceLocation( + this$1.toks, + getLineInfo(this$1.input, replace.start), + getLineInfo(this$1.input, replace.end)); } + return replace + } + } + } +}; + +lp.resetTo = function(pos) { + var this$1 = this; + + this.toks.pos = pos; + var ch = this.input.charAt(pos - 1); + this.toks.exprAllowed = !ch || /[[{(,;:?/*=+\-~!|&%^<>]/.test(ch) || + /[enwfd]/.test(ch) && + /\b(case|else|return|throw|new|in|(instance|type)?of|delete|void)$/.test(this.input.slice(pos - 10, pos)); + + if (this.options.locations) { + this.toks.curLine = 1; + this.toks.lineStart = lineBreakG.lastIndex = 0; + var match; + while ((match = lineBreakG.exec(this.input)) && match.index < pos) { + ++this$1.toks.curLine; + this$1.toks.lineStart = match.index + match[0].length; + } + } +}; + +lp.lookAhead = function(n) { + var this$1 = this; + + while (n > this.ahead.length) + { this$1.ahead.push(this$1.readToken()); } + return this.ahead[n - 1] +}; + +function isDummy(node) { return node.name === "✖" } + +var lp$1 = LooseParser.prototype; + +lp$1.parseTopLevel = function() { + var this$1 = this; + + var node = this.startNodeAt(this.options.locations ? [0, getLineInfo(this.input, 0)] : 0); + node.body = []; + while (this.tok.type !== tokTypes.eof) { node.body.push(this$1.parseStatement()); } + this.toks.adaptDirectivePrologue(node.body); + this.last = this.tok; + if (this.options.ecmaVersion >= 6) { + node.sourceType = this.options.sourceType; + } + return this.finishNode(node, "Program") +}; + +lp$1.parseStatement = function() { + var this$1 = this; + + var starttype = this.tok.type, node = this.startNode(), kind; + + if (this.toks.isLet()) { + starttype = tokTypes._var; + kind = "let"; + } + + switch (starttype) { + case tokTypes._break: case tokTypes._continue: + this.next(); + var isBreak = starttype === tokTypes._break; + if (this.semicolon() || this.canInsertSemicolon()) { + node.label = null; + } else { + node.label = this.tok.type === tokTypes.name ? this.parseIdent() : null; + this.semicolon(); + } + return this.finishNode(node, isBreak ? "BreakStatement" : "ContinueStatement") + + case tokTypes._debugger: + this.next(); + this.semicolon(); + return this.finishNode(node, "DebuggerStatement") + + case tokTypes._do: + this.next(); + node.body = this.parseStatement(); + node.test = this.eat(tokTypes._while) ? this.parseParenExpression() : this.dummyIdent(); + this.semicolon(); + return this.finishNode(node, "DoWhileStatement") + + case tokTypes._for: + this.next(); // `for` keyword + var isAwait = this.options.ecmaVersion >= 9 && this.inAsync && this.eatContextual("await"); + + this.pushCx(); + this.expect(tokTypes.parenL); + if (this.tok.type === tokTypes.semi) { return this.parseFor(node, null) } + var isLet = this.toks.isLet(); + if (isLet || this.tok.type === tokTypes._var || this.tok.type === tokTypes._const) { + var init$1 = this.parseVar(true, isLet ? "let" : this.tok.value); + if (init$1.declarations.length === 1 && (this.tok.type === tokTypes._in || this.isContextual("of"))) { + if (this.options.ecmaVersion >= 9 && this.tok.type !== tokTypes._in) { + node.await = isAwait; + } + return this.parseForIn(node, init$1) + } + return this.parseFor(node, init$1) + } + var init = this.parseExpression(true); + if (this.tok.type === tokTypes._in || this.isContextual("of")) { + if (this.options.ecmaVersion >= 9 && this.tok.type !== tokTypes._in) { + node.await = isAwait; + } + return this.parseForIn(node, this.toAssignable(init)) + } + return this.parseFor(node, init) + + case tokTypes._function: + this.next(); + return this.parseFunction(node, true) + + case tokTypes._if: + this.next(); + node.test = this.parseParenExpression(); + node.consequent = this.parseStatement(); + node.alternate = this.eat(tokTypes._else) ? this.parseStatement() : null; + return this.finishNode(node, "IfStatement") + + case tokTypes._return: + this.next(); + if (this.eat(tokTypes.semi) || this.canInsertSemicolon()) { node.argument = null; } + else { node.argument = this.parseExpression(); this.semicolon(); } + return this.finishNode(node, "ReturnStatement") + + case tokTypes._switch: + var blockIndent = this.curIndent, line = this.curLineStart; + this.next(); + node.discriminant = this.parseParenExpression(); + node.cases = []; + this.pushCx(); + this.expect(tokTypes.braceL); + + var cur; + while (!this.closes(tokTypes.braceR, blockIndent, line, true)) { + if (this$1.tok.type === tokTypes._case || this$1.tok.type === tokTypes._default) { + var isCase = this$1.tok.type === tokTypes._case; + if (cur) { this$1.finishNode(cur, "SwitchCase"); } + node.cases.push(cur = this$1.startNode()); + cur.consequent = []; + this$1.next(); + if (isCase) { cur.test = this$1.parseExpression(); } + else { cur.test = null; } + this$1.expect(tokTypes.colon); + } else { + if (!cur) { + node.cases.push(cur = this$1.startNode()); + cur.consequent = []; + cur.test = null; + } + cur.consequent.push(this$1.parseStatement()); + } + } + if (cur) { this.finishNode(cur, "SwitchCase"); } + this.popCx(); + this.eat(tokTypes.braceR); + return this.finishNode(node, "SwitchStatement") + + case tokTypes._throw: + this.next(); + node.argument = this.parseExpression(); + this.semicolon(); + return this.finishNode(node, "ThrowStatement") + + case tokTypes._try: + this.next(); + node.block = this.parseBlock(); + node.handler = null; + if (this.tok.type === tokTypes._catch) { + var clause = this.startNode(); + this.next(); + if (this.eat(tokTypes.parenL)) { + clause.param = this.toAssignable(this.parseExprAtom(), true); + this.expect(tokTypes.parenR); + } else { + clause.param = null; + } + clause.body = this.parseBlock(); + node.handler = this.finishNode(clause, "CatchClause"); + } + node.finalizer = this.eat(tokTypes._finally) ? this.parseBlock() : null; + if (!node.handler && !node.finalizer) { return node.block } + return this.finishNode(node, "TryStatement") + + case tokTypes._var: + case tokTypes._const: + return this.parseVar(false, kind || this.tok.value) + + case tokTypes._while: + this.next(); + node.test = this.parseParenExpression(); + node.body = this.parseStatement(); + return this.finishNode(node, "WhileStatement") + + case tokTypes._with: + this.next(); + node.object = this.parseParenExpression(); + node.body = this.parseStatement(); + return this.finishNode(node, "WithStatement") + + case tokTypes.braceL: + return this.parseBlock() + + case tokTypes.semi: + this.next(); + return this.finishNode(node, "EmptyStatement") + + case tokTypes._class: + return this.parseClass(true) + + case tokTypes._import: + return this.parseImport() + + case tokTypes._export: + return this.parseExport() + + default: + if (this.toks.isAsyncFunction()) { + this.next(); + this.next(); + return this.parseFunction(node, true, true) + } + var expr = this.parseExpression(); + if (isDummy(expr)) { + this.next(); + if (this.tok.type === tokTypes.eof) { return this.finishNode(node, "EmptyStatement") } + return this.parseStatement() + } else if (starttype === tokTypes.name && expr.type === "Identifier" && this.eat(tokTypes.colon)) { + node.body = this.parseStatement(); + node.label = expr; + return this.finishNode(node, "LabeledStatement") + } else { + node.expression = expr; + this.semicolon(); + return this.finishNode(node, "ExpressionStatement") + } + } +}; + +lp$1.parseBlock = function() { + var this$1 = this; + + var node = this.startNode(); + this.pushCx(); + this.expect(tokTypes.braceL); + var blockIndent = this.curIndent, line = this.curLineStart; + node.body = []; + while (!this.closes(tokTypes.braceR, blockIndent, line, true)) + { node.body.push(this$1.parseStatement()); } + this.popCx(); + this.eat(tokTypes.braceR); + return this.finishNode(node, "BlockStatement") +}; + +lp$1.parseFor = function(node, init) { + node.init = init; + node.test = node.update = null; + if (this.eat(tokTypes.semi) && this.tok.type !== tokTypes.semi) { node.test = this.parseExpression(); } + if (this.eat(tokTypes.semi) && this.tok.type !== tokTypes.parenR) { node.update = this.parseExpression(); } + this.popCx(); + this.expect(tokTypes.parenR); + node.body = this.parseStatement(); + return this.finishNode(node, "ForStatement") +}; + +lp$1.parseForIn = function(node, init) { + var type = this.tok.type === tokTypes._in ? "ForInStatement" : "ForOfStatement"; + this.next(); + node.left = init; + node.right = this.parseExpression(); + this.popCx(); + this.expect(tokTypes.parenR); + node.body = this.parseStatement(); + return this.finishNode(node, type) +}; + +lp$1.parseVar = function(noIn, kind) { + var this$1 = this; + + var node = this.startNode(); + node.kind = kind; + this.next(); + node.declarations = []; + do { + var decl = this$1.startNode(); + decl.id = this$1.options.ecmaVersion >= 6 ? this$1.toAssignable(this$1.parseExprAtom(), true) : this$1.parseIdent(); + decl.init = this$1.eat(tokTypes.eq) ? this$1.parseMaybeAssign(noIn) : null; + node.declarations.push(this$1.finishNode(decl, "VariableDeclarator")); + } while (this.eat(tokTypes.comma)) + if (!node.declarations.length) { + var decl$1 = this.startNode(); + decl$1.id = this.dummyIdent(); + node.declarations.push(this.finishNode(decl$1, "VariableDeclarator")); + } + if (!noIn) { this.semicolon(); } + return this.finishNode(node, "VariableDeclaration") +}; + +lp$1.parseClass = function(isStatement) { + var this$1 = this; + + var node = this.startNode(); + this.next(); + if (this.tok.type === tokTypes.name) { node.id = this.parseIdent(); } + else if (isStatement === true) { node.id = this.dummyIdent(); } + else { node.id = null; } + node.superClass = this.eat(tokTypes._extends) ? this.parseExpression() : null; + node.body = this.startNode(); + node.body.body = []; + this.pushCx(); + var indent = this.curIndent + 1, line = this.curLineStart; + this.eat(tokTypes.braceL); + if (this.curIndent + 1 < indent) { indent = this.curIndent; line = this.curLineStart; } + while (!this.closes(tokTypes.braceR, indent, line)) { + if (this$1.semicolon()) { continue } + var method = this$1.startNode(), isGenerator = (void 0), isAsync = (void 0); + if (this$1.options.ecmaVersion >= 6) { + method.static = false; + isGenerator = this$1.eat(tokTypes.star); + } + this$1.parsePropertyName(method); + if (isDummy(method.key)) { if (isDummy(this$1.parseMaybeAssign())) { this$1.next(); } this$1.eat(tokTypes.comma); continue } + if (method.key.type === "Identifier" && !method.computed && method.key.name === "static" && + (this$1.tok.type !== tokTypes.parenL && this$1.tok.type !== tokTypes.braceL)) { + method.static = true; + isGenerator = this$1.eat(tokTypes.star); + this$1.parsePropertyName(method); + } else { + method.static = false; + } + if (!method.computed && + method.key.type === "Identifier" && method.key.name === "async" && this$1.tok.type !== tokTypes.parenL && + !this$1.canInsertSemicolon()) { + isAsync = true; + isGenerator = this$1.options.ecmaVersion >= 9 && this$1.eat(tokTypes.star); + this$1.parsePropertyName(method); + } else { + isAsync = false; + } + if (this$1.options.ecmaVersion >= 5 && method.key.type === "Identifier" && + !method.computed && (method.key.name === "get" || method.key.name === "set") && + this$1.tok.type !== tokTypes.parenL && this$1.tok.type !== tokTypes.braceL) { + method.kind = method.key.name; + this$1.parsePropertyName(method); + method.value = this$1.parseMethod(false); + } else { + if (!method.computed && !method.static && !isGenerator && !isAsync && ( + method.key.type === "Identifier" && method.key.name === "constructor" || + method.key.type === "Literal" && method.key.value === "constructor")) { + method.kind = "constructor"; + } else { + method.kind = "method"; + } + method.value = this$1.parseMethod(isGenerator, isAsync); + } + node.body.body.push(this$1.finishNode(method, "MethodDefinition")); + } + this.popCx(); + if (!this.eat(tokTypes.braceR)) { + // If there is no closing brace, make the node span to the start + // of the next token (this is useful for Tern) + this.last.end = this.tok.start; + if (this.options.locations) { this.last.loc.end = this.tok.loc.start; } + } + this.semicolon(); + this.finishNode(node.body, "ClassBody"); + return this.finishNode(node, isStatement ? "ClassDeclaration" : "ClassExpression") +}; + +lp$1.parseFunction = function(node, isStatement, isAsync) { + var oldInAsync = this.inAsync, oldInFunction = this.inFunction; + this.initFunction(node); + if (this.options.ecmaVersion >= 6) { + node.generator = this.eat(tokTypes.star); + } + if (this.options.ecmaVersion >= 8) { + node.async = !!isAsync; + } + if (this.tok.type === tokTypes.name) { node.id = this.parseIdent(); } + else if (isStatement === true) { node.id = this.dummyIdent(); } + this.inAsync = node.async; + this.inFunction = true; + node.params = this.parseFunctionParams(); + node.body = this.parseBlock(); + this.toks.adaptDirectivePrologue(node.body.body); + this.inAsync = oldInAsync; + this.inFunction = oldInFunction; + return this.finishNode(node, isStatement ? "FunctionDeclaration" : "FunctionExpression") +}; + +lp$1.parseExport = function() { + var node = this.startNode(); + this.next(); + if (this.eat(tokTypes.star)) { + node.source = this.eatContextual("from") ? this.parseExprAtom() : this.dummyString(); + return this.finishNode(node, "ExportAllDeclaration") + } + if (this.eat(tokTypes._default)) { + // export default (function foo() {}) // This is FunctionExpression. + var isAsync; + if (this.tok.type === tokTypes._function || (isAsync = this.toks.isAsyncFunction())) { + var fNode = this.startNode(); + this.next(); + if (isAsync) { this.next(); } + node.declaration = this.parseFunction(fNode, "nullableID", isAsync); + } else if (this.tok.type === tokTypes._class) { + node.declaration = this.parseClass("nullableID"); + } else { + node.declaration = this.parseMaybeAssign(); + this.semicolon(); + } + return this.finishNode(node, "ExportDefaultDeclaration") + } + if (this.tok.type.keyword || this.toks.isLet() || this.toks.isAsyncFunction()) { + node.declaration = this.parseStatement(); + node.specifiers = []; + node.source = null; + } else { + node.declaration = null; + node.specifiers = this.parseExportSpecifierList(); + node.source = this.eatContextual("from") ? this.parseExprAtom() : null; + this.semicolon(); + } + return this.finishNode(node, "ExportNamedDeclaration") +}; + +lp$1.parseImport = function() { + var node = this.startNode(); + this.next(); + if (this.tok.type === tokTypes.string) { + node.specifiers = []; + node.source = this.parseExprAtom(); + } else { + var elt; + if (this.tok.type === tokTypes.name && this.tok.value !== "from") { + elt = this.startNode(); + elt.local = this.parseIdent(); + this.finishNode(elt, "ImportDefaultSpecifier"); + this.eat(tokTypes.comma); + } + node.specifiers = this.parseImportSpecifierList(); + node.source = this.eatContextual("from") && this.tok.type === tokTypes.string ? this.parseExprAtom() : this.dummyString(); + if (elt) { node.specifiers.unshift(elt); } + } + this.semicolon(); + return this.finishNode(node, "ImportDeclaration") +}; + +lp$1.parseImportSpecifierList = function() { + var this$1 = this; + + var elts = []; + if (this.tok.type === tokTypes.star) { + var elt = this.startNode(); + this.next(); + elt.local = this.eatContextual("as") ? this.parseIdent() : this.dummyIdent(); + elts.push(this.finishNode(elt, "ImportNamespaceSpecifier")); + } else { + var indent = this.curIndent, line = this.curLineStart, continuedLine = this.nextLineStart; + this.pushCx(); + this.eat(tokTypes.braceL); + if (this.curLineStart > continuedLine) { continuedLine = this.curLineStart; } + while (!this.closes(tokTypes.braceR, indent + (this.curLineStart <= continuedLine ? 1 : 0), line)) { + var elt$1 = this$1.startNode(); + if (this$1.eat(tokTypes.star)) { + elt$1.local = this$1.eatContextual("as") ? this$1.parseIdent() : this$1.dummyIdent(); + this$1.finishNode(elt$1, "ImportNamespaceSpecifier"); + } else { + if (this$1.isContextual("from")) { break } + elt$1.imported = this$1.parseIdent(); + if (isDummy(elt$1.imported)) { break } + elt$1.local = this$1.eatContextual("as") ? this$1.parseIdent() : elt$1.imported; + this$1.finishNode(elt$1, "ImportSpecifier"); + } + elts.push(elt$1); + this$1.eat(tokTypes.comma); + } + this.eat(tokTypes.braceR); + this.popCx(); + } + return elts +}; + +lp$1.parseExportSpecifierList = function() { + var this$1 = this; + + var elts = []; + var indent = this.curIndent, line = this.curLineStart, continuedLine = this.nextLineStart; + this.pushCx(); + this.eat(tokTypes.braceL); + if (this.curLineStart > continuedLine) { continuedLine = this.curLineStart; } + while (!this.closes(tokTypes.braceR, indent + (this.curLineStart <= continuedLine ? 1 : 0), line)) { + if (this$1.isContextual("from")) { break } + var elt = this$1.startNode(); + elt.local = this$1.parseIdent(); + if (isDummy(elt.local)) { break } + elt.exported = this$1.eatContextual("as") ? this$1.parseIdent() : elt.local; + this$1.finishNode(elt, "ExportSpecifier"); + elts.push(elt); + this$1.eat(tokTypes.comma); + } + this.eat(tokTypes.braceR); + this.popCx(); + return elts +}; + +var lp$2 = LooseParser.prototype; + +lp$2.checkLVal = function(expr) { + if (!expr) { return expr } + switch (expr.type) { + case "Identifier": + case "MemberExpression": + return expr + + case "ParenthesizedExpression": + expr.expression = this.checkLVal(expr.expression); + return expr + + default: + return this.dummyIdent() + } +}; + +lp$2.parseExpression = function(noIn) { + var this$1 = this; + + var start = this.storeCurrentPos(); + var expr = this.parseMaybeAssign(noIn); + if (this.tok.type === tokTypes.comma) { + var node = this.startNodeAt(start); + node.expressions = [expr]; + while (this.eat(tokTypes.comma)) { node.expressions.push(this$1.parseMaybeAssign(noIn)); } + return this.finishNode(node, "SequenceExpression") + } + return expr +}; + +lp$2.parseParenExpression = function() { + this.pushCx(); + this.expect(tokTypes.parenL); + var val = this.parseExpression(); + this.popCx(); + this.expect(tokTypes.parenR); + return val +}; + +lp$2.parseMaybeAssign = function(noIn) { + if (this.toks.isContextual("yield")) { + var node = this.startNode(); + this.next(); + if (this.semicolon() || this.canInsertSemicolon() || (this.tok.type !== tokTypes.star && !this.tok.type.startsExpr)) { + node.delegate = false; + node.argument = null; + } else { + node.delegate = this.eat(tokTypes.star); + node.argument = this.parseMaybeAssign(); + } + return this.finishNode(node, "YieldExpression") + } + + var start = this.storeCurrentPos(); + var left = this.parseMaybeConditional(noIn); + if (this.tok.type.isAssign) { + var node$1 = this.startNodeAt(start); + node$1.operator = this.tok.value; + node$1.left = this.tok.type === tokTypes.eq ? this.toAssignable(left) : this.checkLVal(left); + this.next(); + node$1.right = this.parseMaybeAssign(noIn); + return this.finishNode(node$1, "AssignmentExpression") + } + return left +}; + +lp$2.parseMaybeConditional = function(noIn) { + var start = this.storeCurrentPos(); + var expr = this.parseExprOps(noIn); + if (this.eat(tokTypes.question)) { + var node = this.startNodeAt(start); + node.test = expr; + node.consequent = this.parseMaybeAssign(); + node.alternate = this.expect(tokTypes.colon) ? this.parseMaybeAssign(noIn) : this.dummyIdent(); + return this.finishNode(node, "ConditionalExpression") + } + return expr +}; + +lp$2.parseExprOps = function(noIn) { + var start = this.storeCurrentPos(); + var indent = this.curIndent, line = this.curLineStart; + return this.parseExprOp(this.parseMaybeUnary(false), start, -1, noIn, indent, line) +}; + +lp$2.parseExprOp = function(left, start, minPrec, noIn, indent, line) { + if (this.curLineStart !== line && this.curIndent < indent && this.tokenStartsLine()) { return left } + var prec = this.tok.type.binop; + if (prec != null && (!noIn || this.tok.type !== tokTypes._in)) { + if (prec > minPrec) { + var node = this.startNodeAt(start); + node.left = left; + node.operator = this.tok.value; + this.next(); + if (this.curLineStart !== line && this.curIndent < indent && this.tokenStartsLine()) { + node.right = this.dummyIdent(); + } else { + var rightStart = this.storeCurrentPos(); + node.right = this.parseExprOp(this.parseMaybeUnary(false), rightStart, prec, noIn, indent, line); + } + this.finishNode(node, /&&|\|\|/.test(node.operator) ? "LogicalExpression" : "BinaryExpression"); + return this.parseExprOp(node, start, minPrec, noIn, indent, line) + } + } + return left +}; + +lp$2.parseMaybeUnary = function(sawUnary) { + var this$1 = this; + + var start = this.storeCurrentPos(), expr; + if (this.options.ecmaVersion >= 8 && this.toks.isContextual("await") && + (this.inAsync || (!this.inFunction && this.options.allowAwaitOutsideFunction)) + ) { + expr = this.parseAwait(); + sawUnary = true; + } else if (this.tok.type.prefix) { + var node = this.startNode(), update = this.tok.type === tokTypes.incDec; + if (!update) { sawUnary = true; } + node.operator = this.tok.value; + node.prefix = true; + this.next(); + node.argument = this.parseMaybeUnary(true); + if (update) { node.argument = this.checkLVal(node.argument); } + expr = this.finishNode(node, update ? "UpdateExpression" : "UnaryExpression"); + } else if (this.tok.type === tokTypes.ellipsis) { + var node$1 = this.startNode(); + this.next(); + node$1.argument = this.parseMaybeUnary(sawUnary); + expr = this.finishNode(node$1, "SpreadElement"); + } else { + expr = this.parseExprSubscripts(); + while (this.tok.type.postfix && !this.canInsertSemicolon()) { + var node$2 = this$1.startNodeAt(start); + node$2.operator = this$1.tok.value; + node$2.prefix = false; + node$2.argument = this$1.checkLVal(expr); + this$1.next(); + expr = this$1.finishNode(node$2, "UpdateExpression"); + } + } + + if (!sawUnary && this.eat(tokTypes.starstar)) { + var node$3 = this.startNodeAt(start); + node$3.operator = "**"; + node$3.left = expr; + node$3.right = this.parseMaybeUnary(false); + return this.finishNode(node$3, "BinaryExpression") + } + + return expr +}; + +lp$2.parseExprSubscripts = function() { + var start = this.storeCurrentPos(); + return this.parseSubscripts(this.parseExprAtom(), start, false, this.curIndent, this.curLineStart) +}; + +lp$2.parseSubscripts = function(base, start, noCalls, startIndent, line) { + var this$1 = this; + + for (;;) { + if (this$1.curLineStart !== line && this$1.curIndent <= startIndent && this$1.tokenStartsLine()) { + if (this$1.tok.type === tokTypes.dot && this$1.curIndent === startIndent) + { --startIndent; } + else + { return base } + } + + var maybeAsyncArrow = base.type === "Identifier" && base.name === "async" && !this$1.canInsertSemicolon(); + + if (this$1.eat(tokTypes.dot)) { + var node = this$1.startNodeAt(start); + node.object = base; + if (this$1.curLineStart !== line && this$1.curIndent <= startIndent && this$1.tokenStartsLine()) + { node.property = this$1.dummyIdent(); } + else + { node.property = this$1.parsePropertyAccessor() || this$1.dummyIdent(); } + node.computed = false; + base = this$1.finishNode(node, "MemberExpression"); + } else if (this$1.tok.type === tokTypes.bracketL) { + this$1.pushCx(); + this$1.next(); + var node$1 = this$1.startNodeAt(start); + node$1.object = base; + node$1.property = this$1.parseExpression(); + node$1.computed = true; + this$1.popCx(); + this$1.expect(tokTypes.bracketR); + base = this$1.finishNode(node$1, "MemberExpression"); + } else if (!noCalls && this$1.tok.type === tokTypes.parenL) { + var exprList = this$1.parseExprList(tokTypes.parenR); + if (maybeAsyncArrow && this$1.eat(tokTypes.arrow)) + { return this$1.parseArrowExpression(this$1.startNodeAt(start), exprList, true) } + var node$2 = this$1.startNodeAt(start); + node$2.callee = base; + node$2.arguments = exprList; + base = this$1.finishNode(node$2, "CallExpression"); + } else if (this$1.tok.type === tokTypes.backQuote) { + var node$3 = this$1.startNodeAt(start); + node$3.tag = base; + node$3.quasi = this$1.parseTemplate(); + base = this$1.finishNode(node$3, "TaggedTemplateExpression"); + } else { + return base + } + } +}; + +lp$2.parseExprAtom = function() { + var node; + switch (this.tok.type) { + case tokTypes._this: + case tokTypes._super: + var type = this.tok.type === tokTypes._this ? "ThisExpression" : "Super"; + node = this.startNode(); + this.next(); + return this.finishNode(node, type) + + case tokTypes.name: + var start = this.storeCurrentPos(); + var id = this.parseIdent(); + var isAsync = false; + if (id.name === "async" && !this.canInsertSemicolon()) { + if (this.eat(tokTypes._function)) + { return this.parseFunction(this.startNodeAt(start), false, true) } + if (this.tok.type === tokTypes.name) { + id = this.parseIdent(); + isAsync = true; + } + } + return this.eat(tokTypes.arrow) ? this.parseArrowExpression(this.startNodeAt(start), [id], isAsync) : id + + case tokTypes.regexp: + node = this.startNode(); + var val = this.tok.value; + node.regex = {pattern: val.pattern, flags: val.flags}; + node.value = val.value; + node.raw = this.input.slice(this.tok.start, this.tok.end); + this.next(); + return this.finishNode(node, "Literal") + + case tokTypes.num: case tokTypes.string: + node = this.startNode(); + node.value = this.tok.value; + node.raw = this.input.slice(this.tok.start, this.tok.end); + this.next(); + return this.finishNode(node, "Literal") + + case tokTypes._null: case tokTypes._true: case tokTypes._false: + node = this.startNode(); + node.value = this.tok.type === tokTypes._null ? null : this.tok.type === tokTypes._true; + node.raw = this.tok.type.keyword; + this.next(); + return this.finishNode(node, "Literal") + + case tokTypes.parenL: + var parenStart = this.storeCurrentPos(); + this.next(); + var inner = this.parseExpression(); + this.expect(tokTypes.parenR); + if (this.eat(tokTypes.arrow)) { + // (a,)=>a // SequenceExpression makes dummy in the last hole. Drop the dummy. + var params = inner.expressions || [inner]; + if (params.length && isDummy(params[params.length - 1])) + { params.pop(); } + return this.parseArrowExpression(this.startNodeAt(parenStart), params) + } + if (this.options.preserveParens) { + var par = this.startNodeAt(parenStart); + par.expression = inner; + inner = this.finishNode(par, "ParenthesizedExpression"); + } + return inner + + case tokTypes.bracketL: + node = this.startNode(); + node.elements = this.parseExprList(tokTypes.bracketR, true); + return this.finishNode(node, "ArrayExpression") + + case tokTypes.braceL: + return this.parseObj() + + case tokTypes._class: + return this.parseClass(false) + + case tokTypes._function: + node = this.startNode(); + this.next(); + return this.parseFunction(node, false) + + case tokTypes._new: + return this.parseNew() + + case tokTypes.backQuote: + return this.parseTemplate() + + default: + return this.dummyIdent() + } +}; + +lp$2.parseNew = function() { + var node = this.startNode(), startIndent = this.curIndent, line = this.curLineStart; + var meta = this.parseIdent(true); + if (this.options.ecmaVersion >= 6 && this.eat(tokTypes.dot)) { + node.meta = meta; + node.property = this.parseIdent(true); + return this.finishNode(node, "MetaProperty") + } + var start = this.storeCurrentPos(); + node.callee = this.parseSubscripts(this.parseExprAtom(), start, true, startIndent, line); + if (this.tok.type === tokTypes.parenL) { + node.arguments = this.parseExprList(tokTypes.parenR); + } else { + node.arguments = []; + } + return this.finishNode(node, "NewExpression") +}; + +lp$2.parseTemplateElement = function() { + var elem = this.startNode(); + + // The loose parser accepts invalid unicode escapes even in untagged templates. + if (this.tok.type === tokTypes.invalidTemplate) { + elem.value = { + raw: this.tok.value, + cooked: null + }; + } else { + elem.value = { + raw: this.input.slice(this.tok.start, this.tok.end).replace(/\r\n?/g, "\n"), + cooked: this.tok.value + }; + } + this.next(); + elem.tail = this.tok.type === tokTypes.backQuote; + return this.finishNode(elem, "TemplateElement") +}; + +lp$2.parseTemplate = function() { + var this$1 = this; + + var node = this.startNode(); + this.next(); + node.expressions = []; + var curElt = this.parseTemplateElement(); + node.quasis = [curElt]; + while (!curElt.tail) { + this$1.next(); + node.expressions.push(this$1.parseExpression()); + if (this$1.expect(tokTypes.braceR)) { + curElt = this$1.parseTemplateElement(); + } else { + curElt = this$1.startNode(); + curElt.value = {cooked: "", raw: ""}; + curElt.tail = true; + this$1.finishNode(curElt, "TemplateElement"); + } + node.quasis.push(curElt); + } + this.expect(tokTypes.backQuote); + return this.finishNode(node, "TemplateLiteral") +}; + +lp$2.parseObj = function() { + var this$1 = this; + + var node = this.startNode(); + node.properties = []; + this.pushCx(); + var indent = this.curIndent + 1, line = this.curLineStart; + this.eat(tokTypes.braceL); + if (this.curIndent + 1 < indent) { indent = this.curIndent; line = this.curLineStart; } + while (!this.closes(tokTypes.braceR, indent, line)) { + var prop = this$1.startNode(), isGenerator = (void 0), isAsync = (void 0), start = (void 0); + if (this$1.options.ecmaVersion >= 9 && this$1.eat(tokTypes.ellipsis)) { + prop.argument = this$1.parseMaybeAssign(); + node.properties.push(this$1.finishNode(prop, "SpreadElement")); + this$1.eat(tokTypes.comma); + continue + } + if (this$1.options.ecmaVersion >= 6) { + start = this$1.storeCurrentPos(); + prop.method = false; + prop.shorthand = false; + isGenerator = this$1.eat(tokTypes.star); + } + this$1.parsePropertyName(prop); + if (this$1.toks.isAsyncProp(prop)) { + isAsync = true; + isGenerator = this$1.options.ecmaVersion >= 9 && this$1.eat(tokTypes.star); + this$1.parsePropertyName(prop); + } else { + isAsync = false; + } + if (isDummy(prop.key)) { if (isDummy(this$1.parseMaybeAssign())) { this$1.next(); } this$1.eat(tokTypes.comma); continue } + if (this$1.eat(tokTypes.colon)) { + prop.kind = "init"; + prop.value = this$1.parseMaybeAssign(); + } else if (this$1.options.ecmaVersion >= 6 && (this$1.tok.type === tokTypes.parenL || this$1.tok.type === tokTypes.braceL)) { + prop.kind = "init"; + prop.method = true; + prop.value = this$1.parseMethod(isGenerator, isAsync); + } else if (this$1.options.ecmaVersion >= 5 && prop.key.type === "Identifier" && + !prop.computed && (prop.key.name === "get" || prop.key.name === "set") && + (this$1.tok.type !== tokTypes.comma && this$1.tok.type !== tokTypes.braceR && this$1.tok.type !== tokTypes.eq)) { + prop.kind = prop.key.name; + this$1.parsePropertyName(prop); + prop.value = this$1.parseMethod(false); + } else { + prop.kind = "init"; + if (this$1.options.ecmaVersion >= 6) { + if (this$1.eat(tokTypes.eq)) { + var assign = this$1.startNodeAt(start); + assign.operator = "="; + assign.left = prop.key; + assign.right = this$1.parseMaybeAssign(); + prop.value = this$1.finishNode(assign, "AssignmentExpression"); + } else { + prop.value = prop.key; + } + } else { + prop.value = this$1.dummyIdent(); + } + prop.shorthand = true; + } + node.properties.push(this$1.finishNode(prop, "Property")); + this$1.eat(tokTypes.comma); + } + this.popCx(); + if (!this.eat(tokTypes.braceR)) { + // If there is no closing brace, make the node span to the start + // of the next token (this is useful for Tern) + this.last.end = this.tok.start; + if (this.options.locations) { this.last.loc.end = this.tok.loc.start; } + } + return this.finishNode(node, "ObjectExpression") +}; + +lp$2.parsePropertyName = function(prop) { + if (this.options.ecmaVersion >= 6) { + if (this.eat(tokTypes.bracketL)) { + prop.computed = true; + prop.key = this.parseExpression(); + this.expect(tokTypes.bracketR); + return + } else { + prop.computed = false; + } + } + var key = (this.tok.type === tokTypes.num || this.tok.type === tokTypes.string) ? this.parseExprAtom() : this.parseIdent(); + prop.key = key || this.dummyIdent(); +}; + +lp$2.parsePropertyAccessor = function() { + if (this.tok.type === tokTypes.name || this.tok.type.keyword) { return this.parseIdent() } +}; + +lp$2.parseIdent = function() { + var name = this.tok.type === tokTypes.name ? this.tok.value : this.tok.type.keyword; + if (!name) { return this.dummyIdent() } + var node = this.startNode(); + this.next(); + node.name = name; + return this.finishNode(node, "Identifier") +}; + +lp$2.initFunction = function(node) { + node.id = null; + node.params = []; + if (this.options.ecmaVersion >= 6) { + node.generator = false; + node.expression = false; + } + if (this.options.ecmaVersion >= 8) + { node.async = false; } +}; + +// Convert existing expression atom to assignable pattern +// if possible. + +lp$2.toAssignable = function(node, binding) { + var this$1 = this; + + if (!node || node.type === "Identifier" || (node.type === "MemberExpression" && !binding)) { + // Okay + } else if (node.type === "ParenthesizedExpression") { + this.toAssignable(node.expression, binding); + } else if (this.options.ecmaVersion < 6) { + return this.dummyIdent() + } else if (node.type === "ObjectExpression") { + node.type = "ObjectPattern"; + for (var i = 0, list = node.properties; i < list.length; i += 1) + { + var prop = list[i]; + + this$1.toAssignable(prop, binding); + } + } else if (node.type === "ArrayExpression") { + node.type = "ArrayPattern"; + this.toAssignableList(node.elements, binding); + } else if (node.type === "Property") { + this.toAssignable(node.value, binding); + } else if (node.type === "SpreadElement") { + node.type = "RestElement"; + this.toAssignable(node.argument, binding); + } else if (node.type === "AssignmentExpression") { + node.type = "AssignmentPattern"; + delete node.operator; + } else { + return this.dummyIdent() + } + return node +}; + +lp$2.toAssignableList = function(exprList, binding) { + var this$1 = this; + + for (var i = 0, list = exprList; i < list.length; i += 1) + { + var expr = list[i]; + + this$1.toAssignable(expr, binding); + } + return exprList +}; + +lp$2.parseFunctionParams = function(params) { + params = this.parseExprList(tokTypes.parenR); + return this.toAssignableList(params, true) +}; + +lp$2.parseMethod = function(isGenerator, isAsync) { + var node = this.startNode(), oldInAsync = this.inAsync, oldInFunction = this.inFunction; + this.initFunction(node); + if (this.options.ecmaVersion >= 6) + { node.generator = !!isGenerator; } + if (this.options.ecmaVersion >= 8) + { node.async = !!isAsync; } + this.inAsync = node.async; + this.inFunction = true; + node.params = this.parseFunctionParams(); + node.body = this.parseBlock(); + this.toks.adaptDirectivePrologue(node.body.body); + this.inAsync = oldInAsync; + this.inFunction = oldInFunction; + return this.finishNode(node, "FunctionExpression") +}; + +lp$2.parseArrowExpression = function(node, params, isAsync) { + var oldInAsync = this.inAsync, oldInFunction = this.inFunction; + this.initFunction(node); + if (this.options.ecmaVersion >= 8) + { node.async = !!isAsync; } + this.inAsync = node.async; + this.inFunction = true; + node.params = this.toAssignableList(params, true); + node.expression = this.tok.type !== tokTypes.braceL; + if (node.expression) { + node.body = this.parseMaybeAssign(); + } else { + node.body = this.parseBlock(); + this.toks.adaptDirectivePrologue(node.body.body); + } + this.inAsync = oldInAsync; + this.inFunction = oldInFunction; + return this.finishNode(node, "ArrowFunctionExpression") +}; + +lp$2.parseExprList = function(close, allowEmpty) { + var this$1 = this; + + this.pushCx(); + var indent = this.curIndent, line = this.curLineStart, elts = []; + this.next(); // Opening bracket + while (!this.closes(close, indent + 1, line)) { + if (this$1.eat(tokTypes.comma)) { + elts.push(allowEmpty ? null : this$1.dummyIdent()); + continue + } + var elt = this$1.parseMaybeAssign(); + if (isDummy(elt)) { + if (this$1.closes(close, indent, line)) { break } + this$1.next(); + } else { + elts.push(elt); + } + this$1.eat(tokTypes.comma); + } + this.popCx(); + if (!this.eat(close)) { + // If there is no closing brace, make the node span to the start + // of the next token (this is useful for Tern) + this.last.end = this.tok.start; + if (this.options.locations) { this.last.loc.end = this.tok.loc.start; } + } + return elts +}; + +lp$2.parseAwait = function() { + var node = this.startNode(); + this.next(); + node.argument = this.parseMaybeUnary(); + return this.finishNode(node, "AwaitExpression") +}; + +// Acorn: Loose parser +// +// This module provides an alternative parser (`parse_dammit`) that +// exposes that same interface as `parse`, but will try to parse +// anything as JavaScript, repairing syntax error the best it can. +// There are circumstances in which it will raise an error and give +// up, but they are very rare. The resulting AST will be a mostly +// valid JavaScript AST (as per the [Mozilla parser API][api], except +// that: +// +// - Return outside functions is allowed +// +// - Label consistency (no conflicts, break only to existing labels) +// is not enforced. +// +// - Bogus Identifier nodes with a name of `"✖"` are inserted whenever +// the parser got too confused to return anything meaningful. +// +// [api]: https://developer.mozilla.org/en-US/docs/SpiderMonkey/Parser_API +// +// The expected use for this is to *first* try `acorn.parse`, and only +// if that fails switch to `parse_dammit`. The loose parser might +// parse badly indented code incorrectly, so **don't** use it as +// your default parser. +// +// Quite a lot of acorn.js is duplicated here. The alternative was to +// add a *lot* of extra cruft to that file, making it less readable +// and slower. Copying and editing the code allowed me to make +// invasive changes and simplifications without creating a complicated +// tangle. + +defaultOptions.tabSize = 4; + +// eslint-disable-next-line camelcase +function parse_dammit(input, options) { + return new LooseParser(input, options).parse() +} + +addLooseExports(parse_dammit, LooseParser, pluginsLoose); + +export { parse_dammit, LooseParser, pluginsLoose }; diff --git a/node_modules/acorn/dist/acorn_loose.js b/node_modules/acorn/dist/acorn_loose.js new file mode 100644 index 00000000..e1dc7a44 --- /dev/null +++ b/node_modules/acorn/dist/acorn_loose.js @@ -0,0 +1,1434 @@ +(function (global, factory) { + typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('./acorn')) : + typeof define === 'function' && define.amd ? define(['exports', './acorn'], factory) : + (factory((global.acorn = global.acorn || {}, global.acorn.loose = {}),global.acorn)); +}(this, (function (exports,__acorn) { 'use strict'; + +function noop() {} + +// Registered plugins +var pluginsLoose = {}; + +var LooseParser = function LooseParser(input, options) { + if ( options === void 0 ) options = {}; + + this.toks = __acorn.tokenizer(input, options); + this.options = this.toks.options; + this.input = this.toks.input; + this.tok = this.last = {type: __acorn.tokTypes.eof, start: 0, end: 0}; + this.tok.validateRegExpFlags = noop; + this.tok.validateRegExpPattern = noop; + if (this.options.locations) { + var here = this.toks.curPosition(); + this.tok.loc = new __acorn.SourceLocation(this.toks, here, here); + } + this.ahead = []; // Tokens ahead + this.context = []; // Indentation contexted + this.curIndent = 0; + this.curLineStart = 0; + this.nextLineStart = this.lineEnd(this.curLineStart) + 1; + this.inAsync = false; + this.inFunction = false; + // Load plugins + this.options.pluginsLoose = options.pluginsLoose || {}; + this.loadPlugins(this.options.pluginsLoose); +}; + +LooseParser.prototype.startNode = function startNode () { + return new __acorn.Node(this.toks, this.tok.start, this.options.locations ? this.tok.loc.start : null) +}; + +LooseParser.prototype.storeCurrentPos = function storeCurrentPos () { + return this.options.locations ? [this.tok.start, this.tok.loc.start] : this.tok.start +}; + +LooseParser.prototype.startNodeAt = function startNodeAt (pos) { + if (this.options.locations) { + return new __acorn.Node(this.toks, pos[0], pos[1]) + } else { + return new __acorn.Node(this.toks, pos) + } +}; + +LooseParser.prototype.finishNode = function finishNode (node, type) { + node.type = type; + node.end = this.last.end; + if (this.options.locations) + { node.loc.end = this.last.loc.end; } + if (this.options.ranges) + { node.range[1] = this.last.end; } + return node +}; + +LooseParser.prototype.dummyNode = function dummyNode (type) { + var dummy = this.startNode(); + dummy.type = type; + dummy.end = dummy.start; + if (this.options.locations) + { dummy.loc.end = dummy.loc.start; } + if (this.options.ranges) + { dummy.range[1] = dummy.start; } + this.last = {type: __acorn.tokTypes.name, start: dummy.start, end: dummy.start, loc: dummy.loc}; + return dummy +}; + +LooseParser.prototype.dummyIdent = function dummyIdent () { + var dummy = this.dummyNode("Identifier"); + dummy.name = "✖"; + return dummy +}; + +LooseParser.prototype.dummyString = function dummyString () { + var dummy = this.dummyNode("Literal"); + dummy.value = dummy.raw = "✖"; + return dummy +}; + +LooseParser.prototype.eat = function eat (type) { + if (this.tok.type === type) { + this.next(); + return true + } else { + return false + } +}; + +LooseParser.prototype.isContextual = function isContextual (name) { + return this.tok.type === __acorn.tokTypes.name && this.tok.value === name +}; + +LooseParser.prototype.eatContextual = function eatContextual (name) { + return this.tok.value === name && this.eat(__acorn.tokTypes.name) +}; + +LooseParser.prototype.canInsertSemicolon = function canInsertSemicolon () { + return this.tok.type === __acorn.tokTypes.eof || this.tok.type === __acorn.tokTypes.braceR || + __acorn.lineBreak.test(this.input.slice(this.last.end, this.tok.start)) +}; + +LooseParser.prototype.semicolon = function semicolon () { + return this.eat(__acorn.tokTypes.semi) +}; + +LooseParser.prototype.expect = function expect (type) { + var this$1 = this; + + if (this.eat(type)) { return true } + for (var i = 1; i <= 2; i++) { + if (this$1.lookAhead(i).type === type) { + for (var j = 0; j < i; j++) { this$1.next(); } + return true + } + } +}; + +LooseParser.prototype.pushCx = function pushCx () { + this.context.push(this.curIndent); +}; + +LooseParser.prototype.popCx = function popCx () { + this.curIndent = this.context.pop(); +}; + +LooseParser.prototype.lineEnd = function lineEnd (pos) { + while (pos < this.input.length && !__acorn.isNewLine(this.input.charCodeAt(pos))) { ++pos; } + return pos +}; + +LooseParser.prototype.indentationAfter = function indentationAfter (pos) { + var this$1 = this; + + for (var count = 0;; ++pos) { + var ch = this$1.input.charCodeAt(pos); + if (ch === 32) { ++count; } + else if (ch === 9) { count += this$1.options.tabSize; } + else { return count } + } +}; + +LooseParser.prototype.closes = function closes (closeTok, indent, line, blockHeuristic) { + if (this.tok.type === closeTok || this.tok.type === __acorn.tokTypes.eof) { return true } + return line !== this.curLineStart && this.curIndent < indent && this.tokenStartsLine() && + (!blockHeuristic || this.nextLineStart >= this.input.length || + this.indentationAfter(this.nextLineStart) < indent) +}; + +LooseParser.prototype.tokenStartsLine = function tokenStartsLine () { + var this$1 = this; + + for (var p = this.tok.start - 1; p >= this.curLineStart; --p) { + var ch = this$1.input.charCodeAt(p); + if (ch !== 9 && ch !== 32) { return false } + } + return true +}; + +LooseParser.prototype.extend = function extend (name, f) { + this[name] = f(this[name]); +}; + +LooseParser.prototype.loadPlugins = function loadPlugins (pluginConfigs) { + var this$1 = this; + + for (var name in pluginConfigs) { + var plugin = pluginsLoose[name]; + if (!plugin) { throw new Error("Plugin '" + name + "' not found") } + plugin(this$1, pluginConfigs[name]); + } +}; + +LooseParser.prototype.parse = function parse () { + this.next(); + return this.parseTopLevel() +}; + +var lp = LooseParser.prototype; + +function isSpace(ch) { + return (ch < 14 && ch > 8) || ch === 32 || ch === 160 || __acorn.isNewLine(ch) +} + +lp.next = function() { + var this$1 = this; + + this.last = this.tok; + if (this.ahead.length) + { this.tok = this.ahead.shift(); } + else + { this.tok = this.readToken(); } + + if (this.tok.start >= this.nextLineStart) { + while (this.tok.start >= this.nextLineStart) { + this$1.curLineStart = this$1.nextLineStart; + this$1.nextLineStart = this$1.lineEnd(this$1.curLineStart) + 1; + } + this.curIndent = this.indentationAfter(this.curLineStart); + } +}; + +lp.readToken = function() { + var this$1 = this; + + for (;;) { + try { + this$1.toks.next(); + if (this$1.toks.type === __acorn.tokTypes.dot && + this$1.input.substr(this$1.toks.end, 1) === "." && + this$1.options.ecmaVersion >= 6) { + this$1.toks.end++; + this$1.toks.type = __acorn.tokTypes.ellipsis; + } + return new __acorn.Token(this$1.toks) + } catch (e) { + if (!(e instanceof SyntaxError)) { throw e } + + // Try to skip some text, based on the error message, and then continue + var msg = e.message, pos = e.raisedAt, replace = true; + if (/unterminated/i.test(msg)) { + pos = this$1.lineEnd(e.pos + 1); + if (/string/.test(msg)) { + replace = {start: e.pos, end: pos, type: __acorn.tokTypes.string, value: this$1.input.slice(e.pos + 1, pos)}; + } else if (/regular expr/i.test(msg)) { + var re = this$1.input.slice(e.pos, pos); + try { re = new RegExp(re); } catch (e) { /* ignore compilation error due to new syntax */ } + replace = {start: e.pos, end: pos, type: __acorn.tokTypes.regexp, value: re}; + } else if (/template/.test(msg)) { + replace = { + start: e.pos, + end: pos, + type: __acorn.tokTypes.template, + value: this$1.input.slice(e.pos, pos) + }; + } else { + replace = false; + } + } else if (/invalid (unicode|regexp|number)|expecting unicode|octal literal|is reserved|directly after number|expected number in radix/i.test(msg)) { + while (pos < this.input.length && !isSpace(this.input.charCodeAt(pos))) { ++pos; } + } else if (/character escape|expected hexadecimal/i.test(msg)) { + while (pos < this.input.length) { + var ch = this$1.input.charCodeAt(pos++); + if (ch === 34 || ch === 39 || __acorn.isNewLine(ch)) { break } + } + } else if (/unexpected character/i.test(msg)) { + pos++; + replace = false; + } else if (/regular expression/i.test(msg)) { + replace = true; + } else { + throw e + } + this$1.resetTo(pos); + if (replace === true) { replace = {start: pos, end: pos, type: __acorn.tokTypes.name, value: "✖"}; } + if (replace) { + if (this$1.options.locations) + { replace.loc = new __acorn.SourceLocation( + this$1.toks, + __acorn.getLineInfo(this$1.input, replace.start), + __acorn.getLineInfo(this$1.input, replace.end)); } + return replace + } + } + } +}; + +lp.resetTo = function(pos) { + var this$1 = this; + + this.toks.pos = pos; + var ch = this.input.charAt(pos - 1); + this.toks.exprAllowed = !ch || /[[{(,;:?/*=+\-~!|&%^<>]/.test(ch) || + /[enwfd]/.test(ch) && + /\b(case|else|return|throw|new|in|(instance|type)?of|delete|void)$/.test(this.input.slice(pos - 10, pos)); + + if (this.options.locations) { + this.toks.curLine = 1; + this.toks.lineStart = __acorn.lineBreakG.lastIndex = 0; + var match; + while ((match = __acorn.lineBreakG.exec(this.input)) && match.index < pos) { + ++this$1.toks.curLine; + this$1.toks.lineStart = match.index + match[0].length; + } + } +}; + +lp.lookAhead = function(n) { + var this$1 = this; + + while (n > this.ahead.length) + { this$1.ahead.push(this$1.readToken()); } + return this.ahead[n - 1] +}; + +function isDummy(node) { return node.name === "✖" } + +var lp$1 = LooseParser.prototype; + +lp$1.parseTopLevel = function() { + var this$1 = this; + + var node = this.startNodeAt(this.options.locations ? [0, __acorn.getLineInfo(this.input, 0)] : 0); + node.body = []; + while (this.tok.type !== __acorn.tokTypes.eof) { node.body.push(this$1.parseStatement()); } + this.toks.adaptDirectivePrologue(node.body); + this.last = this.tok; + if (this.options.ecmaVersion >= 6) { + node.sourceType = this.options.sourceType; + } + return this.finishNode(node, "Program") +}; + +lp$1.parseStatement = function() { + var this$1 = this; + + var starttype = this.tok.type, node = this.startNode(), kind; + + if (this.toks.isLet()) { + starttype = __acorn.tokTypes._var; + kind = "let"; + } + + switch (starttype) { + case __acorn.tokTypes._break: case __acorn.tokTypes._continue: + this.next(); + var isBreak = starttype === __acorn.tokTypes._break; + if (this.semicolon() || this.canInsertSemicolon()) { + node.label = null; + } else { + node.label = this.tok.type === __acorn.tokTypes.name ? this.parseIdent() : null; + this.semicolon(); + } + return this.finishNode(node, isBreak ? "BreakStatement" : "ContinueStatement") + + case __acorn.tokTypes._debugger: + this.next(); + this.semicolon(); + return this.finishNode(node, "DebuggerStatement") + + case __acorn.tokTypes._do: + this.next(); + node.body = this.parseStatement(); + node.test = this.eat(__acorn.tokTypes._while) ? this.parseParenExpression() : this.dummyIdent(); + this.semicolon(); + return this.finishNode(node, "DoWhileStatement") + + case __acorn.tokTypes._for: + this.next(); // `for` keyword + var isAwait = this.options.ecmaVersion >= 9 && this.inAsync && this.eatContextual("await"); + + this.pushCx(); + this.expect(__acorn.tokTypes.parenL); + if (this.tok.type === __acorn.tokTypes.semi) { return this.parseFor(node, null) } + var isLet = this.toks.isLet(); + if (isLet || this.tok.type === __acorn.tokTypes._var || this.tok.type === __acorn.tokTypes._const) { + var init$1 = this.parseVar(true, isLet ? "let" : this.tok.value); + if (init$1.declarations.length === 1 && (this.tok.type === __acorn.tokTypes._in || this.isContextual("of"))) { + if (this.options.ecmaVersion >= 9 && this.tok.type !== __acorn.tokTypes._in) { + node.await = isAwait; + } + return this.parseForIn(node, init$1) + } + return this.parseFor(node, init$1) + } + var init = this.parseExpression(true); + if (this.tok.type === __acorn.tokTypes._in || this.isContextual("of")) { + if (this.options.ecmaVersion >= 9 && this.tok.type !== __acorn.tokTypes._in) { + node.await = isAwait; + } + return this.parseForIn(node, this.toAssignable(init)) + } + return this.parseFor(node, init) + + case __acorn.tokTypes._function: + this.next(); + return this.parseFunction(node, true) + + case __acorn.tokTypes._if: + this.next(); + node.test = this.parseParenExpression(); + node.consequent = this.parseStatement(); + node.alternate = this.eat(__acorn.tokTypes._else) ? this.parseStatement() : null; + return this.finishNode(node, "IfStatement") + + case __acorn.tokTypes._return: + this.next(); + if (this.eat(__acorn.tokTypes.semi) || this.canInsertSemicolon()) { node.argument = null; } + else { node.argument = this.parseExpression(); this.semicolon(); } + return this.finishNode(node, "ReturnStatement") + + case __acorn.tokTypes._switch: + var blockIndent = this.curIndent, line = this.curLineStart; + this.next(); + node.discriminant = this.parseParenExpression(); + node.cases = []; + this.pushCx(); + this.expect(__acorn.tokTypes.braceL); + + var cur; + while (!this.closes(__acorn.tokTypes.braceR, blockIndent, line, true)) { + if (this$1.tok.type === __acorn.tokTypes._case || this$1.tok.type === __acorn.tokTypes._default) { + var isCase = this$1.tok.type === __acorn.tokTypes._case; + if (cur) { this$1.finishNode(cur, "SwitchCase"); } + node.cases.push(cur = this$1.startNode()); + cur.consequent = []; + this$1.next(); + if (isCase) { cur.test = this$1.parseExpression(); } + else { cur.test = null; } + this$1.expect(__acorn.tokTypes.colon); + } else { + if (!cur) { + node.cases.push(cur = this$1.startNode()); + cur.consequent = []; + cur.test = null; + } + cur.consequent.push(this$1.parseStatement()); + } + } + if (cur) { this.finishNode(cur, "SwitchCase"); } + this.popCx(); + this.eat(__acorn.tokTypes.braceR); + return this.finishNode(node, "SwitchStatement") + + case __acorn.tokTypes._throw: + this.next(); + node.argument = this.parseExpression(); + this.semicolon(); + return this.finishNode(node, "ThrowStatement") + + case __acorn.tokTypes._try: + this.next(); + node.block = this.parseBlock(); + node.handler = null; + if (this.tok.type === __acorn.tokTypes._catch) { + var clause = this.startNode(); + this.next(); + if (this.eat(__acorn.tokTypes.parenL)) { + clause.param = this.toAssignable(this.parseExprAtom(), true); + this.expect(__acorn.tokTypes.parenR); + } else { + clause.param = null; + } + clause.body = this.parseBlock(); + node.handler = this.finishNode(clause, "CatchClause"); + } + node.finalizer = this.eat(__acorn.tokTypes._finally) ? this.parseBlock() : null; + if (!node.handler && !node.finalizer) { return node.block } + return this.finishNode(node, "TryStatement") + + case __acorn.tokTypes._var: + case __acorn.tokTypes._const: + return this.parseVar(false, kind || this.tok.value) + + case __acorn.tokTypes._while: + this.next(); + node.test = this.parseParenExpression(); + node.body = this.parseStatement(); + return this.finishNode(node, "WhileStatement") + + case __acorn.tokTypes._with: + this.next(); + node.object = this.parseParenExpression(); + node.body = this.parseStatement(); + return this.finishNode(node, "WithStatement") + + case __acorn.tokTypes.braceL: + return this.parseBlock() + + case __acorn.tokTypes.semi: + this.next(); + return this.finishNode(node, "EmptyStatement") + + case __acorn.tokTypes._class: + return this.parseClass(true) + + case __acorn.tokTypes._import: + return this.parseImport() + + case __acorn.tokTypes._export: + return this.parseExport() + + default: + if (this.toks.isAsyncFunction()) { + this.next(); + this.next(); + return this.parseFunction(node, true, true) + } + var expr = this.parseExpression(); + if (isDummy(expr)) { + this.next(); + if (this.tok.type === __acorn.tokTypes.eof) { return this.finishNode(node, "EmptyStatement") } + return this.parseStatement() + } else if (starttype === __acorn.tokTypes.name && expr.type === "Identifier" && this.eat(__acorn.tokTypes.colon)) { + node.body = this.parseStatement(); + node.label = expr; + return this.finishNode(node, "LabeledStatement") + } else { + node.expression = expr; + this.semicolon(); + return this.finishNode(node, "ExpressionStatement") + } + } +}; + +lp$1.parseBlock = function() { + var this$1 = this; + + var node = this.startNode(); + this.pushCx(); + this.expect(__acorn.tokTypes.braceL); + var blockIndent = this.curIndent, line = this.curLineStart; + node.body = []; + while (!this.closes(__acorn.tokTypes.braceR, blockIndent, line, true)) + { node.body.push(this$1.parseStatement()); } + this.popCx(); + this.eat(__acorn.tokTypes.braceR); + return this.finishNode(node, "BlockStatement") +}; + +lp$1.parseFor = function(node, init) { + node.init = init; + node.test = node.update = null; + if (this.eat(__acorn.tokTypes.semi) && this.tok.type !== __acorn.tokTypes.semi) { node.test = this.parseExpression(); } + if (this.eat(__acorn.tokTypes.semi) && this.tok.type !== __acorn.tokTypes.parenR) { node.update = this.parseExpression(); } + this.popCx(); + this.expect(__acorn.tokTypes.parenR); + node.body = this.parseStatement(); + return this.finishNode(node, "ForStatement") +}; + +lp$1.parseForIn = function(node, init) { + var type = this.tok.type === __acorn.tokTypes._in ? "ForInStatement" : "ForOfStatement"; + this.next(); + node.left = init; + node.right = this.parseExpression(); + this.popCx(); + this.expect(__acorn.tokTypes.parenR); + node.body = this.parseStatement(); + return this.finishNode(node, type) +}; + +lp$1.parseVar = function(noIn, kind) { + var this$1 = this; + + var node = this.startNode(); + node.kind = kind; + this.next(); + node.declarations = []; + do { + var decl = this$1.startNode(); + decl.id = this$1.options.ecmaVersion >= 6 ? this$1.toAssignable(this$1.parseExprAtom(), true) : this$1.parseIdent(); + decl.init = this$1.eat(__acorn.tokTypes.eq) ? this$1.parseMaybeAssign(noIn) : null; + node.declarations.push(this$1.finishNode(decl, "VariableDeclarator")); + } while (this.eat(__acorn.tokTypes.comma)) + if (!node.declarations.length) { + var decl$1 = this.startNode(); + decl$1.id = this.dummyIdent(); + node.declarations.push(this.finishNode(decl$1, "VariableDeclarator")); + } + if (!noIn) { this.semicolon(); } + return this.finishNode(node, "VariableDeclaration") +}; + +lp$1.parseClass = function(isStatement) { + var this$1 = this; + + var node = this.startNode(); + this.next(); + if (this.tok.type === __acorn.tokTypes.name) { node.id = this.parseIdent(); } + else if (isStatement === true) { node.id = this.dummyIdent(); } + else { node.id = null; } + node.superClass = this.eat(__acorn.tokTypes._extends) ? this.parseExpression() : null; + node.body = this.startNode(); + node.body.body = []; + this.pushCx(); + var indent = this.curIndent + 1, line = this.curLineStart; + this.eat(__acorn.tokTypes.braceL); + if (this.curIndent + 1 < indent) { indent = this.curIndent; line = this.curLineStart; } + while (!this.closes(__acorn.tokTypes.braceR, indent, line)) { + if (this$1.semicolon()) { continue } + var method = this$1.startNode(), isGenerator = (void 0), isAsync = (void 0); + if (this$1.options.ecmaVersion >= 6) { + method.static = false; + isGenerator = this$1.eat(__acorn.tokTypes.star); + } + this$1.parsePropertyName(method); + if (isDummy(method.key)) { if (isDummy(this$1.parseMaybeAssign())) { this$1.next(); } this$1.eat(__acorn.tokTypes.comma); continue } + if (method.key.type === "Identifier" && !method.computed && method.key.name === "static" && + (this$1.tok.type !== __acorn.tokTypes.parenL && this$1.tok.type !== __acorn.tokTypes.braceL)) { + method.static = true; + isGenerator = this$1.eat(__acorn.tokTypes.star); + this$1.parsePropertyName(method); + } else { + method.static = false; + } + if (!method.computed && + method.key.type === "Identifier" && method.key.name === "async" && this$1.tok.type !== __acorn.tokTypes.parenL && + !this$1.canInsertSemicolon()) { + isAsync = true; + isGenerator = this$1.options.ecmaVersion >= 9 && this$1.eat(__acorn.tokTypes.star); + this$1.parsePropertyName(method); + } else { + isAsync = false; + } + if (this$1.options.ecmaVersion >= 5 && method.key.type === "Identifier" && + !method.computed && (method.key.name === "get" || method.key.name === "set") && + this$1.tok.type !== __acorn.tokTypes.parenL && this$1.tok.type !== __acorn.tokTypes.braceL) { + method.kind = method.key.name; + this$1.parsePropertyName(method); + method.value = this$1.parseMethod(false); + } else { + if (!method.computed && !method.static && !isGenerator && !isAsync && ( + method.key.type === "Identifier" && method.key.name === "constructor" || + method.key.type === "Literal" && method.key.value === "constructor")) { + method.kind = "constructor"; + } else { + method.kind = "method"; + } + method.value = this$1.parseMethod(isGenerator, isAsync); + } + node.body.body.push(this$1.finishNode(method, "MethodDefinition")); + } + this.popCx(); + if (!this.eat(__acorn.tokTypes.braceR)) { + // If there is no closing brace, make the node span to the start + // of the next token (this is useful for Tern) + this.last.end = this.tok.start; + if (this.options.locations) { this.last.loc.end = this.tok.loc.start; } + } + this.semicolon(); + this.finishNode(node.body, "ClassBody"); + return this.finishNode(node, isStatement ? "ClassDeclaration" : "ClassExpression") +}; + +lp$1.parseFunction = function(node, isStatement, isAsync) { + var oldInAsync = this.inAsync, oldInFunction = this.inFunction; + this.initFunction(node); + if (this.options.ecmaVersion >= 6) { + node.generator = this.eat(__acorn.tokTypes.star); + } + if (this.options.ecmaVersion >= 8) { + node.async = !!isAsync; + } + if (this.tok.type === __acorn.tokTypes.name) { node.id = this.parseIdent(); } + else if (isStatement === true) { node.id = this.dummyIdent(); } + this.inAsync = node.async; + this.inFunction = true; + node.params = this.parseFunctionParams(); + node.body = this.parseBlock(); + this.toks.adaptDirectivePrologue(node.body.body); + this.inAsync = oldInAsync; + this.inFunction = oldInFunction; + return this.finishNode(node, isStatement ? "FunctionDeclaration" : "FunctionExpression") +}; + +lp$1.parseExport = function() { + var node = this.startNode(); + this.next(); + if (this.eat(__acorn.tokTypes.star)) { + node.source = this.eatContextual("from") ? this.parseExprAtom() : this.dummyString(); + return this.finishNode(node, "ExportAllDeclaration") + } + if (this.eat(__acorn.tokTypes._default)) { + // export default (function foo() {}) // This is FunctionExpression. + var isAsync; + if (this.tok.type === __acorn.tokTypes._function || (isAsync = this.toks.isAsyncFunction())) { + var fNode = this.startNode(); + this.next(); + if (isAsync) { this.next(); } + node.declaration = this.parseFunction(fNode, "nullableID", isAsync); + } else if (this.tok.type === __acorn.tokTypes._class) { + node.declaration = this.parseClass("nullableID"); + } else { + node.declaration = this.parseMaybeAssign(); + this.semicolon(); + } + return this.finishNode(node, "ExportDefaultDeclaration") + } + if (this.tok.type.keyword || this.toks.isLet() || this.toks.isAsyncFunction()) { + node.declaration = this.parseStatement(); + node.specifiers = []; + node.source = null; + } else { + node.declaration = null; + node.specifiers = this.parseExportSpecifierList(); + node.source = this.eatContextual("from") ? this.parseExprAtom() : null; + this.semicolon(); + } + return this.finishNode(node, "ExportNamedDeclaration") +}; + +lp$1.parseImport = function() { + var node = this.startNode(); + this.next(); + if (this.tok.type === __acorn.tokTypes.string) { + node.specifiers = []; + node.source = this.parseExprAtom(); + } else { + var elt; + if (this.tok.type === __acorn.tokTypes.name && this.tok.value !== "from") { + elt = this.startNode(); + elt.local = this.parseIdent(); + this.finishNode(elt, "ImportDefaultSpecifier"); + this.eat(__acorn.tokTypes.comma); + } + node.specifiers = this.parseImportSpecifierList(); + node.source = this.eatContextual("from") && this.tok.type === __acorn.tokTypes.string ? this.parseExprAtom() : this.dummyString(); + if (elt) { node.specifiers.unshift(elt); } + } + this.semicolon(); + return this.finishNode(node, "ImportDeclaration") +}; + +lp$1.parseImportSpecifierList = function() { + var this$1 = this; + + var elts = []; + if (this.tok.type === __acorn.tokTypes.star) { + var elt = this.startNode(); + this.next(); + elt.local = this.eatContextual("as") ? this.parseIdent() : this.dummyIdent(); + elts.push(this.finishNode(elt, "ImportNamespaceSpecifier")); + } else { + var indent = this.curIndent, line = this.curLineStart, continuedLine = this.nextLineStart; + this.pushCx(); + this.eat(__acorn.tokTypes.braceL); + if (this.curLineStart > continuedLine) { continuedLine = this.curLineStart; } + while (!this.closes(__acorn.tokTypes.braceR, indent + (this.curLineStart <= continuedLine ? 1 : 0), line)) { + var elt$1 = this$1.startNode(); + if (this$1.eat(__acorn.tokTypes.star)) { + elt$1.local = this$1.eatContextual("as") ? this$1.parseIdent() : this$1.dummyIdent(); + this$1.finishNode(elt$1, "ImportNamespaceSpecifier"); + } else { + if (this$1.isContextual("from")) { break } + elt$1.imported = this$1.parseIdent(); + if (isDummy(elt$1.imported)) { break } + elt$1.local = this$1.eatContextual("as") ? this$1.parseIdent() : elt$1.imported; + this$1.finishNode(elt$1, "ImportSpecifier"); + } + elts.push(elt$1); + this$1.eat(__acorn.tokTypes.comma); + } + this.eat(__acorn.tokTypes.braceR); + this.popCx(); + } + return elts +}; + +lp$1.parseExportSpecifierList = function() { + var this$1 = this; + + var elts = []; + var indent = this.curIndent, line = this.curLineStart, continuedLine = this.nextLineStart; + this.pushCx(); + this.eat(__acorn.tokTypes.braceL); + if (this.curLineStart > continuedLine) { continuedLine = this.curLineStart; } + while (!this.closes(__acorn.tokTypes.braceR, indent + (this.curLineStart <= continuedLine ? 1 : 0), line)) { + if (this$1.isContextual("from")) { break } + var elt = this$1.startNode(); + elt.local = this$1.parseIdent(); + if (isDummy(elt.local)) { break } + elt.exported = this$1.eatContextual("as") ? this$1.parseIdent() : elt.local; + this$1.finishNode(elt, "ExportSpecifier"); + elts.push(elt); + this$1.eat(__acorn.tokTypes.comma); + } + this.eat(__acorn.tokTypes.braceR); + this.popCx(); + return elts +}; + +var lp$2 = LooseParser.prototype; + +lp$2.checkLVal = function(expr) { + if (!expr) { return expr } + switch (expr.type) { + case "Identifier": + case "MemberExpression": + return expr + + case "ParenthesizedExpression": + expr.expression = this.checkLVal(expr.expression); + return expr + + default: + return this.dummyIdent() + } +}; + +lp$2.parseExpression = function(noIn) { + var this$1 = this; + + var start = this.storeCurrentPos(); + var expr = this.parseMaybeAssign(noIn); + if (this.tok.type === __acorn.tokTypes.comma) { + var node = this.startNodeAt(start); + node.expressions = [expr]; + while (this.eat(__acorn.tokTypes.comma)) { node.expressions.push(this$1.parseMaybeAssign(noIn)); } + return this.finishNode(node, "SequenceExpression") + } + return expr +}; + +lp$2.parseParenExpression = function() { + this.pushCx(); + this.expect(__acorn.tokTypes.parenL); + var val = this.parseExpression(); + this.popCx(); + this.expect(__acorn.tokTypes.parenR); + return val +}; + +lp$2.parseMaybeAssign = function(noIn) { + if (this.toks.isContextual("yield")) { + var node = this.startNode(); + this.next(); + if (this.semicolon() || this.canInsertSemicolon() || (this.tok.type !== __acorn.tokTypes.star && !this.tok.type.startsExpr)) { + node.delegate = false; + node.argument = null; + } else { + node.delegate = this.eat(__acorn.tokTypes.star); + node.argument = this.parseMaybeAssign(); + } + return this.finishNode(node, "YieldExpression") + } + + var start = this.storeCurrentPos(); + var left = this.parseMaybeConditional(noIn); + if (this.tok.type.isAssign) { + var node$1 = this.startNodeAt(start); + node$1.operator = this.tok.value; + node$1.left = this.tok.type === __acorn.tokTypes.eq ? this.toAssignable(left) : this.checkLVal(left); + this.next(); + node$1.right = this.parseMaybeAssign(noIn); + return this.finishNode(node$1, "AssignmentExpression") + } + return left +}; + +lp$2.parseMaybeConditional = function(noIn) { + var start = this.storeCurrentPos(); + var expr = this.parseExprOps(noIn); + if (this.eat(__acorn.tokTypes.question)) { + var node = this.startNodeAt(start); + node.test = expr; + node.consequent = this.parseMaybeAssign(); + node.alternate = this.expect(__acorn.tokTypes.colon) ? this.parseMaybeAssign(noIn) : this.dummyIdent(); + return this.finishNode(node, "ConditionalExpression") + } + return expr +}; + +lp$2.parseExprOps = function(noIn) { + var start = this.storeCurrentPos(); + var indent = this.curIndent, line = this.curLineStart; + return this.parseExprOp(this.parseMaybeUnary(false), start, -1, noIn, indent, line) +}; + +lp$2.parseExprOp = function(left, start, minPrec, noIn, indent, line) { + if (this.curLineStart !== line && this.curIndent < indent && this.tokenStartsLine()) { return left } + var prec = this.tok.type.binop; + if (prec != null && (!noIn || this.tok.type !== __acorn.tokTypes._in)) { + if (prec > minPrec) { + var node = this.startNodeAt(start); + node.left = left; + node.operator = this.tok.value; + this.next(); + if (this.curLineStart !== line && this.curIndent < indent && this.tokenStartsLine()) { + node.right = this.dummyIdent(); + } else { + var rightStart = this.storeCurrentPos(); + node.right = this.parseExprOp(this.parseMaybeUnary(false), rightStart, prec, noIn, indent, line); + } + this.finishNode(node, /&&|\|\|/.test(node.operator) ? "LogicalExpression" : "BinaryExpression"); + return this.parseExprOp(node, start, minPrec, noIn, indent, line) + } + } + return left +}; + +lp$2.parseMaybeUnary = function(sawUnary) { + var this$1 = this; + + var start = this.storeCurrentPos(), expr; + if (this.options.ecmaVersion >= 8 && this.toks.isContextual("await") && + (this.inAsync || (!this.inFunction && this.options.allowAwaitOutsideFunction)) + ) { + expr = this.parseAwait(); + sawUnary = true; + } else if (this.tok.type.prefix) { + var node = this.startNode(), update = this.tok.type === __acorn.tokTypes.incDec; + if (!update) { sawUnary = true; } + node.operator = this.tok.value; + node.prefix = true; + this.next(); + node.argument = this.parseMaybeUnary(true); + if (update) { node.argument = this.checkLVal(node.argument); } + expr = this.finishNode(node, update ? "UpdateExpression" : "UnaryExpression"); + } else if (this.tok.type === __acorn.tokTypes.ellipsis) { + var node$1 = this.startNode(); + this.next(); + node$1.argument = this.parseMaybeUnary(sawUnary); + expr = this.finishNode(node$1, "SpreadElement"); + } else { + expr = this.parseExprSubscripts(); + while (this.tok.type.postfix && !this.canInsertSemicolon()) { + var node$2 = this$1.startNodeAt(start); + node$2.operator = this$1.tok.value; + node$2.prefix = false; + node$2.argument = this$1.checkLVal(expr); + this$1.next(); + expr = this$1.finishNode(node$2, "UpdateExpression"); + } + } + + if (!sawUnary && this.eat(__acorn.tokTypes.starstar)) { + var node$3 = this.startNodeAt(start); + node$3.operator = "**"; + node$3.left = expr; + node$3.right = this.parseMaybeUnary(false); + return this.finishNode(node$3, "BinaryExpression") + } + + return expr +}; + +lp$2.parseExprSubscripts = function() { + var start = this.storeCurrentPos(); + return this.parseSubscripts(this.parseExprAtom(), start, false, this.curIndent, this.curLineStart) +}; + +lp$2.parseSubscripts = function(base, start, noCalls, startIndent, line) { + var this$1 = this; + + for (;;) { + if (this$1.curLineStart !== line && this$1.curIndent <= startIndent && this$1.tokenStartsLine()) { + if (this$1.tok.type === __acorn.tokTypes.dot && this$1.curIndent === startIndent) + { --startIndent; } + else + { return base } + } + + var maybeAsyncArrow = base.type === "Identifier" && base.name === "async" && !this$1.canInsertSemicolon(); + + if (this$1.eat(__acorn.tokTypes.dot)) { + var node = this$1.startNodeAt(start); + node.object = base; + if (this$1.curLineStart !== line && this$1.curIndent <= startIndent && this$1.tokenStartsLine()) + { node.property = this$1.dummyIdent(); } + else + { node.property = this$1.parsePropertyAccessor() || this$1.dummyIdent(); } + node.computed = false; + base = this$1.finishNode(node, "MemberExpression"); + } else if (this$1.tok.type === __acorn.tokTypes.bracketL) { + this$1.pushCx(); + this$1.next(); + var node$1 = this$1.startNodeAt(start); + node$1.object = base; + node$1.property = this$1.parseExpression(); + node$1.computed = true; + this$1.popCx(); + this$1.expect(__acorn.tokTypes.bracketR); + base = this$1.finishNode(node$1, "MemberExpression"); + } else if (!noCalls && this$1.tok.type === __acorn.tokTypes.parenL) { + var exprList = this$1.parseExprList(__acorn.tokTypes.parenR); + if (maybeAsyncArrow && this$1.eat(__acorn.tokTypes.arrow)) + { return this$1.parseArrowExpression(this$1.startNodeAt(start), exprList, true) } + var node$2 = this$1.startNodeAt(start); + node$2.callee = base; + node$2.arguments = exprList; + base = this$1.finishNode(node$2, "CallExpression"); + } else if (this$1.tok.type === __acorn.tokTypes.backQuote) { + var node$3 = this$1.startNodeAt(start); + node$3.tag = base; + node$3.quasi = this$1.parseTemplate(); + base = this$1.finishNode(node$3, "TaggedTemplateExpression"); + } else { + return base + } + } +}; + +lp$2.parseExprAtom = function() { + var node; + switch (this.tok.type) { + case __acorn.tokTypes._this: + case __acorn.tokTypes._super: + var type = this.tok.type === __acorn.tokTypes._this ? "ThisExpression" : "Super"; + node = this.startNode(); + this.next(); + return this.finishNode(node, type) + + case __acorn.tokTypes.name: + var start = this.storeCurrentPos(); + var id = this.parseIdent(); + var isAsync = false; + if (id.name === "async" && !this.canInsertSemicolon()) { + if (this.eat(__acorn.tokTypes._function)) + { return this.parseFunction(this.startNodeAt(start), false, true) } + if (this.tok.type === __acorn.tokTypes.name) { + id = this.parseIdent(); + isAsync = true; + } + } + return this.eat(__acorn.tokTypes.arrow) ? this.parseArrowExpression(this.startNodeAt(start), [id], isAsync) : id + + case __acorn.tokTypes.regexp: + node = this.startNode(); + var val = this.tok.value; + node.regex = {pattern: val.pattern, flags: val.flags}; + node.value = val.value; + node.raw = this.input.slice(this.tok.start, this.tok.end); + this.next(); + return this.finishNode(node, "Literal") + + case __acorn.tokTypes.num: case __acorn.tokTypes.string: + node = this.startNode(); + node.value = this.tok.value; + node.raw = this.input.slice(this.tok.start, this.tok.end); + this.next(); + return this.finishNode(node, "Literal") + + case __acorn.tokTypes._null: case __acorn.tokTypes._true: case __acorn.tokTypes._false: + node = this.startNode(); + node.value = this.tok.type === __acorn.tokTypes._null ? null : this.tok.type === __acorn.tokTypes._true; + node.raw = this.tok.type.keyword; + this.next(); + return this.finishNode(node, "Literal") + + case __acorn.tokTypes.parenL: + var parenStart = this.storeCurrentPos(); + this.next(); + var inner = this.parseExpression(); + this.expect(__acorn.tokTypes.parenR); + if (this.eat(__acorn.tokTypes.arrow)) { + // (a,)=>a // SequenceExpression makes dummy in the last hole. Drop the dummy. + var params = inner.expressions || [inner]; + if (params.length && isDummy(params[params.length - 1])) + { params.pop(); } + return this.parseArrowExpression(this.startNodeAt(parenStart), params) + } + if (this.options.preserveParens) { + var par = this.startNodeAt(parenStart); + par.expression = inner; + inner = this.finishNode(par, "ParenthesizedExpression"); + } + return inner + + case __acorn.tokTypes.bracketL: + node = this.startNode(); + node.elements = this.parseExprList(__acorn.tokTypes.bracketR, true); + return this.finishNode(node, "ArrayExpression") + + case __acorn.tokTypes.braceL: + return this.parseObj() + + case __acorn.tokTypes._class: + return this.parseClass(false) + + case __acorn.tokTypes._function: + node = this.startNode(); + this.next(); + return this.parseFunction(node, false) + + case __acorn.tokTypes._new: + return this.parseNew() + + case __acorn.tokTypes.backQuote: + return this.parseTemplate() + + default: + return this.dummyIdent() + } +}; + +lp$2.parseNew = function() { + var node = this.startNode(), startIndent = this.curIndent, line = this.curLineStart; + var meta = this.parseIdent(true); + if (this.options.ecmaVersion >= 6 && this.eat(__acorn.tokTypes.dot)) { + node.meta = meta; + node.property = this.parseIdent(true); + return this.finishNode(node, "MetaProperty") + } + var start = this.storeCurrentPos(); + node.callee = this.parseSubscripts(this.parseExprAtom(), start, true, startIndent, line); + if (this.tok.type === __acorn.tokTypes.parenL) { + node.arguments = this.parseExprList(__acorn.tokTypes.parenR); + } else { + node.arguments = []; + } + return this.finishNode(node, "NewExpression") +}; + +lp$2.parseTemplateElement = function() { + var elem = this.startNode(); + + // The loose parser accepts invalid unicode escapes even in untagged templates. + if (this.tok.type === __acorn.tokTypes.invalidTemplate) { + elem.value = { + raw: this.tok.value, + cooked: null + }; + } else { + elem.value = { + raw: this.input.slice(this.tok.start, this.tok.end).replace(/\r\n?/g, "\n"), + cooked: this.tok.value + }; + } + this.next(); + elem.tail = this.tok.type === __acorn.tokTypes.backQuote; + return this.finishNode(elem, "TemplateElement") +}; + +lp$2.parseTemplate = function() { + var this$1 = this; + + var node = this.startNode(); + this.next(); + node.expressions = []; + var curElt = this.parseTemplateElement(); + node.quasis = [curElt]; + while (!curElt.tail) { + this$1.next(); + node.expressions.push(this$1.parseExpression()); + if (this$1.expect(__acorn.tokTypes.braceR)) { + curElt = this$1.parseTemplateElement(); + } else { + curElt = this$1.startNode(); + curElt.value = {cooked: "", raw: ""}; + curElt.tail = true; + this$1.finishNode(curElt, "TemplateElement"); + } + node.quasis.push(curElt); + } + this.expect(__acorn.tokTypes.backQuote); + return this.finishNode(node, "TemplateLiteral") +}; + +lp$2.parseObj = function() { + var this$1 = this; + + var node = this.startNode(); + node.properties = []; + this.pushCx(); + var indent = this.curIndent + 1, line = this.curLineStart; + this.eat(__acorn.tokTypes.braceL); + if (this.curIndent + 1 < indent) { indent = this.curIndent; line = this.curLineStart; } + while (!this.closes(__acorn.tokTypes.braceR, indent, line)) { + var prop = this$1.startNode(), isGenerator = (void 0), isAsync = (void 0), start = (void 0); + if (this$1.options.ecmaVersion >= 9 && this$1.eat(__acorn.tokTypes.ellipsis)) { + prop.argument = this$1.parseMaybeAssign(); + node.properties.push(this$1.finishNode(prop, "SpreadElement")); + this$1.eat(__acorn.tokTypes.comma); + continue + } + if (this$1.options.ecmaVersion >= 6) { + start = this$1.storeCurrentPos(); + prop.method = false; + prop.shorthand = false; + isGenerator = this$1.eat(__acorn.tokTypes.star); + } + this$1.parsePropertyName(prop); + if (this$1.toks.isAsyncProp(prop)) { + isAsync = true; + isGenerator = this$1.options.ecmaVersion >= 9 && this$1.eat(__acorn.tokTypes.star); + this$1.parsePropertyName(prop); + } else { + isAsync = false; + } + if (isDummy(prop.key)) { if (isDummy(this$1.parseMaybeAssign())) { this$1.next(); } this$1.eat(__acorn.tokTypes.comma); continue } + if (this$1.eat(__acorn.tokTypes.colon)) { + prop.kind = "init"; + prop.value = this$1.parseMaybeAssign(); + } else if (this$1.options.ecmaVersion >= 6 && (this$1.tok.type === __acorn.tokTypes.parenL || this$1.tok.type === __acorn.tokTypes.braceL)) { + prop.kind = "init"; + prop.method = true; + prop.value = this$1.parseMethod(isGenerator, isAsync); + } else if (this$1.options.ecmaVersion >= 5 && prop.key.type === "Identifier" && + !prop.computed && (prop.key.name === "get" || prop.key.name === "set") && + (this$1.tok.type !== __acorn.tokTypes.comma && this$1.tok.type !== __acorn.tokTypes.braceR && this$1.tok.type !== __acorn.tokTypes.eq)) { + prop.kind = prop.key.name; + this$1.parsePropertyName(prop); + prop.value = this$1.parseMethod(false); + } else { + prop.kind = "init"; + if (this$1.options.ecmaVersion >= 6) { + if (this$1.eat(__acorn.tokTypes.eq)) { + var assign = this$1.startNodeAt(start); + assign.operator = "="; + assign.left = prop.key; + assign.right = this$1.parseMaybeAssign(); + prop.value = this$1.finishNode(assign, "AssignmentExpression"); + } else { + prop.value = prop.key; + } + } else { + prop.value = this$1.dummyIdent(); + } + prop.shorthand = true; + } + node.properties.push(this$1.finishNode(prop, "Property")); + this$1.eat(__acorn.tokTypes.comma); + } + this.popCx(); + if (!this.eat(__acorn.tokTypes.braceR)) { + // If there is no closing brace, make the node span to the start + // of the next token (this is useful for Tern) + this.last.end = this.tok.start; + if (this.options.locations) { this.last.loc.end = this.tok.loc.start; } + } + return this.finishNode(node, "ObjectExpression") +}; + +lp$2.parsePropertyName = function(prop) { + if (this.options.ecmaVersion >= 6) { + if (this.eat(__acorn.tokTypes.bracketL)) { + prop.computed = true; + prop.key = this.parseExpression(); + this.expect(__acorn.tokTypes.bracketR); + return + } else { + prop.computed = false; + } + } + var key = (this.tok.type === __acorn.tokTypes.num || this.tok.type === __acorn.tokTypes.string) ? this.parseExprAtom() : this.parseIdent(); + prop.key = key || this.dummyIdent(); +}; + +lp$2.parsePropertyAccessor = function() { + if (this.tok.type === __acorn.tokTypes.name || this.tok.type.keyword) { return this.parseIdent() } +}; + +lp$2.parseIdent = function() { + var name = this.tok.type === __acorn.tokTypes.name ? this.tok.value : this.tok.type.keyword; + if (!name) { return this.dummyIdent() } + var node = this.startNode(); + this.next(); + node.name = name; + return this.finishNode(node, "Identifier") +}; + +lp$2.initFunction = function(node) { + node.id = null; + node.params = []; + if (this.options.ecmaVersion >= 6) { + node.generator = false; + node.expression = false; + } + if (this.options.ecmaVersion >= 8) + { node.async = false; } +}; + +// Convert existing expression atom to assignable pattern +// if possible. + +lp$2.toAssignable = function(node, binding) { + var this$1 = this; + + if (!node || node.type === "Identifier" || (node.type === "MemberExpression" && !binding)) { + // Okay + } else if (node.type === "ParenthesizedExpression") { + this.toAssignable(node.expression, binding); + } else if (this.options.ecmaVersion < 6) { + return this.dummyIdent() + } else if (node.type === "ObjectExpression") { + node.type = "ObjectPattern"; + for (var i = 0, list = node.properties; i < list.length; i += 1) + { + var prop = list[i]; + + this$1.toAssignable(prop, binding); + } + } else if (node.type === "ArrayExpression") { + node.type = "ArrayPattern"; + this.toAssignableList(node.elements, binding); + } else if (node.type === "Property") { + this.toAssignable(node.value, binding); + } else if (node.type === "SpreadElement") { + node.type = "RestElement"; + this.toAssignable(node.argument, binding); + } else if (node.type === "AssignmentExpression") { + node.type = "AssignmentPattern"; + delete node.operator; + } else { + return this.dummyIdent() + } + return node +}; + +lp$2.toAssignableList = function(exprList, binding) { + var this$1 = this; + + for (var i = 0, list = exprList; i < list.length; i += 1) + { + var expr = list[i]; + + this$1.toAssignable(expr, binding); + } + return exprList +}; + +lp$2.parseFunctionParams = function(params) { + params = this.parseExprList(__acorn.tokTypes.parenR); + return this.toAssignableList(params, true) +}; + +lp$2.parseMethod = function(isGenerator, isAsync) { + var node = this.startNode(), oldInAsync = this.inAsync, oldInFunction = this.inFunction; + this.initFunction(node); + if (this.options.ecmaVersion >= 6) + { node.generator = !!isGenerator; } + if (this.options.ecmaVersion >= 8) + { node.async = !!isAsync; } + this.inAsync = node.async; + this.inFunction = true; + node.params = this.parseFunctionParams(); + node.body = this.parseBlock(); + this.toks.adaptDirectivePrologue(node.body.body); + this.inAsync = oldInAsync; + this.inFunction = oldInFunction; + return this.finishNode(node, "FunctionExpression") +}; + +lp$2.parseArrowExpression = function(node, params, isAsync) { + var oldInAsync = this.inAsync, oldInFunction = this.inFunction; + this.initFunction(node); + if (this.options.ecmaVersion >= 8) + { node.async = !!isAsync; } + this.inAsync = node.async; + this.inFunction = true; + node.params = this.toAssignableList(params, true); + node.expression = this.tok.type !== __acorn.tokTypes.braceL; + if (node.expression) { + node.body = this.parseMaybeAssign(); + } else { + node.body = this.parseBlock(); + this.toks.adaptDirectivePrologue(node.body.body); + } + this.inAsync = oldInAsync; + this.inFunction = oldInFunction; + return this.finishNode(node, "ArrowFunctionExpression") +}; + +lp$2.parseExprList = function(close, allowEmpty) { + var this$1 = this; + + this.pushCx(); + var indent = this.curIndent, line = this.curLineStart, elts = []; + this.next(); // Opening bracket + while (!this.closes(close, indent + 1, line)) { + if (this$1.eat(__acorn.tokTypes.comma)) { + elts.push(allowEmpty ? null : this$1.dummyIdent()); + continue + } + var elt = this$1.parseMaybeAssign(); + if (isDummy(elt)) { + if (this$1.closes(close, indent, line)) { break } + this$1.next(); + } else { + elts.push(elt); + } + this$1.eat(__acorn.tokTypes.comma); + } + this.popCx(); + if (!this.eat(close)) { + // If there is no closing brace, make the node span to the start + // of the next token (this is useful for Tern) + this.last.end = this.tok.start; + if (this.options.locations) { this.last.loc.end = this.tok.loc.start; } + } + return elts +}; + +lp$2.parseAwait = function() { + var node = this.startNode(); + this.next(); + node.argument = this.parseMaybeUnary(); + return this.finishNode(node, "AwaitExpression") +}; + +// Acorn: Loose parser +// +// This module provides an alternative parser (`parse_dammit`) that +// exposes that same interface as `parse`, but will try to parse +// anything as JavaScript, repairing syntax error the best it can. +// There are circumstances in which it will raise an error and give +// up, but they are very rare. The resulting AST will be a mostly +// valid JavaScript AST (as per the [Mozilla parser API][api], except +// that: +// +// - Return outside functions is allowed +// +// - Label consistency (no conflicts, break only to existing labels) +// is not enforced. +// +// - Bogus Identifier nodes with a name of `"✖"` are inserted whenever +// the parser got too confused to return anything meaningful. +// +// [api]: https://developer.mozilla.org/en-US/docs/SpiderMonkey/Parser_API +// +// The expected use for this is to *first* try `acorn.parse`, and only +// if that fails switch to `parse_dammit`. The loose parser might +// parse badly indented code incorrectly, so **don't** use it as +// your default parser. +// +// Quite a lot of acorn.js is duplicated here. The alternative was to +// add a *lot* of extra cruft to that file, making it less readable +// and slower. Copying and editing the code allowed me to make +// invasive changes and simplifications without creating a complicated +// tangle. + +__acorn.defaultOptions.tabSize = 4; + +// eslint-disable-next-line camelcase +function parse_dammit(input, options) { + return new LooseParser(input, options).parse() +} + +__acorn.addLooseExports(parse_dammit, LooseParser, pluginsLoose); + +exports.parse_dammit = parse_dammit; +exports.LooseParser = LooseParser; +exports.pluginsLoose = pluginsLoose; + +Object.defineProperty(exports, '__esModule', { value: true }); + +}))); diff --git a/node_modules/acorn/dist/walk.es.js b/node_modules/acorn/dist/walk.es.js new file mode 100644 index 00000000..faa2f001 --- /dev/null +++ b/node_modules/acorn/dist/walk.es.js @@ -0,0 +1,423 @@ +// AST walker module for Mozilla Parser API compatible trees + +// A simple walk is one where you simply specify callbacks to be +// called on specific nodes. The last two arguments are optional. A +// simple use would be +// +// walk.simple(myTree, { +// Expression: function(node) { ... } +// }); +// +// to do something with all expressions. All Parser API node types +// can be used to identify node types, as well as Expression, +// Statement, and ScopeBody, which denote categories of nodes. +// +// The base argument can be used to pass a custom (recursive) +// walker, and state can be used to give this walked an initial +// state. + +function simple(node, visitors, baseVisitor, state, override) { + if (!baseVisitor) { baseVisitor = base + ; }(function c(node, st, override) { + var type = override || node.type, found = visitors[type]; + baseVisitor[type](node, st, c); + if (found) { found(node, st); } + })(node, state, override); +} + +// An ancestor walk keeps an array of ancestor nodes (including the +// current node) and passes them to the callback as third parameter +// (and also as state parameter when no other state is present). +function ancestor(node, visitors, baseVisitor, state) { + var ancestors = []; + if (!baseVisitor) { baseVisitor = base + ; }(function c(node, st, override) { + var type = override || node.type, found = visitors[type]; + var isNew = node !== ancestors[ancestors.length - 1]; + if (isNew) { ancestors.push(node); } + baseVisitor[type](node, st, c); + if (found) { found(node, st || ancestors, ancestors); } + if (isNew) { ancestors.pop(); } + })(node, state); +} + +// A recursive walk is one where your functions override the default +// walkers. They can modify and replace the state parameter that's +// threaded through the walk, and can opt how and whether to walk +// their child nodes (by calling their third argument on these +// nodes). +function recursive(node, state, funcs, baseVisitor, override) { + var visitor = funcs ? make(funcs, baseVisitor || undefined) : baseVisitor;(function c(node, st, override) { + visitor[override || node.type](node, st, c); + })(node, state, override); +} + +function makeTest(test) { + if (typeof test === "string") + { return function (type) { return type === test; } } + else if (!test) + { return function () { return true; } } + else + { return test } +} + +var Found = function Found(node, state) { this.node = node; this.state = state; }; + +// A full walk triggers the callback on each node +function full(node, callback, baseVisitor, state, override) { + if (!baseVisitor) { baseVisitor = base + ; }(function c(node, st, override) { + var type = override || node.type; + baseVisitor[type](node, st, c); + if (!override) { callback(node, st, type); } + })(node, state, override); +} + +// An fullAncestor walk is like an ancestor walk, but triggers +// the callback on each node +function fullAncestor(node, callback, baseVisitor, state) { + if (!baseVisitor) { baseVisitor = base; } + var ancestors = [];(function c(node, st, override) { + var type = override || node.type; + var isNew = node !== ancestors[ancestors.length - 1]; + if (isNew) { ancestors.push(node); } + baseVisitor[type](node, st, c); + if (!override) { callback(node, st || ancestors, ancestors, type); } + if (isNew) { ancestors.pop(); } + })(node, state); +} + +// Find a node with a given start, end, and type (all are optional, +// null can be used as wildcard). Returns a {node, state} object, or +// undefined when it doesn't find a matching node. +function findNodeAt(node, start, end, test, baseVisitor, state) { + if (!baseVisitor) { baseVisitor = base; } + test = makeTest(test); + try { + (function c(node, st, override) { + var type = override || node.type; + if ((start == null || node.start <= start) && + (end == null || node.end >= end)) + { baseVisitor[type](node, st, c); } + if ((start == null || node.start === start) && + (end == null || node.end === end) && + test(type, node)) + { throw new Found(node, st) } + })(node, state); + } catch (e) { + if (e instanceof Found) { return e } + throw e + } +} + +// Find the innermost node of a given type that contains the given +// position. Interface similar to findNodeAt. +function findNodeAround(node, pos, test, baseVisitor, state) { + test = makeTest(test); + if (!baseVisitor) { baseVisitor = base; } + try { + (function c(node, st, override) { + var type = override || node.type; + if (node.start > pos || node.end < pos) { return } + baseVisitor[type](node, st, c); + if (test(type, node)) { throw new Found(node, st) } + })(node, state); + } catch (e) { + if (e instanceof Found) { return e } + throw e + } +} + +// Find the outermost matching node after a given position. +function findNodeAfter(node, pos, test, baseVisitor, state) { + test = makeTest(test); + if (!baseVisitor) { baseVisitor = base; } + try { + (function c(node, st, override) { + if (node.end < pos) { return } + var type = override || node.type; + if (node.start >= pos && test(type, node)) { throw new Found(node, st) } + baseVisitor[type](node, st, c); + })(node, state); + } catch (e) { + if (e instanceof Found) { return e } + throw e + } +} + +// Find the outermost matching node before a given position. +function findNodeBefore(node, pos, test, baseVisitor, state) { + test = makeTest(test); + if (!baseVisitor) { baseVisitor = base; } + var max;(function c(node, st, override) { + if (node.start > pos) { return } + var type = override || node.type; + if (node.end <= pos && (!max || max.node.end < node.end) && test(type, node)) + { max = new Found(node, st); } + baseVisitor[type](node, st, c); + })(node, state); + return max +} + +// Fallback to an Object.create polyfill for older environments. +var create = Object.create || function(proto) { + function Ctor() {} + Ctor.prototype = proto; + return new Ctor +}; + +// Used to create a custom walker. Will fill in all missing node +// type properties with the defaults. +function make(funcs, baseVisitor) { + var visitor = create(baseVisitor || base); + for (var type in funcs) { visitor[type] = funcs[type]; } + return visitor +} + +function skipThrough(node, st, c) { c(node, st); } +function ignore(_node, _st, _c) {} + +// Node walkers. + +var base = {}; + +base.Program = base.BlockStatement = function (node, st, c) { + for (var i = 0, list = node.body; i < list.length; i += 1) + { + var stmt = list[i]; + + c(stmt, st, "Statement"); + } +}; +base.Statement = skipThrough; +base.EmptyStatement = ignore; +base.ExpressionStatement = base.ParenthesizedExpression = + function (node, st, c) { return c(node.expression, st, "Expression"); }; +base.IfStatement = function (node, st, c) { + c(node.test, st, "Expression"); + c(node.consequent, st, "Statement"); + if (node.alternate) { c(node.alternate, st, "Statement"); } +}; +base.LabeledStatement = function (node, st, c) { return c(node.body, st, "Statement"); }; +base.BreakStatement = base.ContinueStatement = ignore; +base.WithStatement = function (node, st, c) { + c(node.object, st, "Expression"); + c(node.body, st, "Statement"); +}; +base.SwitchStatement = function (node, st, c) { + c(node.discriminant, st, "Expression"); + for (var i = 0, list = node.cases; i < list.length; i += 1) { + var cs = list[i]; + + if (cs.test) { c(cs.test, st, "Expression"); } + for (var i$1 = 0, list$1 = cs.consequent; i$1 < list$1.length; i$1 += 1) + { + var cons = list$1[i$1]; + + c(cons, st, "Statement"); + } + } +}; +base.SwitchCase = function (node, st, c) { + if (node.test) { c(node.test, st, "Expression"); } + for (var i = 0, list = node.consequent; i < list.length; i += 1) + { + var cons = list[i]; + + c(cons, st, "Statement"); + } +}; +base.ReturnStatement = base.YieldExpression = base.AwaitExpression = function (node, st, c) { + if (node.argument) { c(node.argument, st, "Expression"); } +}; +base.ThrowStatement = base.SpreadElement = + function (node, st, c) { return c(node.argument, st, "Expression"); }; +base.TryStatement = function (node, st, c) { + c(node.block, st, "Statement"); + if (node.handler) { c(node.handler, st); } + if (node.finalizer) { c(node.finalizer, st, "Statement"); } +}; +base.CatchClause = function (node, st, c) { + if (node.param) { c(node.param, st, "Pattern"); } + c(node.body, st, "ScopeBody"); +}; +base.WhileStatement = base.DoWhileStatement = function (node, st, c) { + c(node.test, st, "Expression"); + c(node.body, st, "Statement"); +}; +base.ForStatement = function (node, st, c) { + if (node.init) { c(node.init, st, "ForInit"); } + if (node.test) { c(node.test, st, "Expression"); } + if (node.update) { c(node.update, st, "Expression"); } + c(node.body, st, "Statement"); +}; +base.ForInStatement = base.ForOfStatement = function (node, st, c) { + c(node.left, st, "ForInit"); + c(node.right, st, "Expression"); + c(node.body, st, "Statement"); +}; +base.ForInit = function (node, st, c) { + if (node.type === "VariableDeclaration") { c(node, st); } + else { c(node, st, "Expression"); } +}; +base.DebuggerStatement = ignore; + +base.FunctionDeclaration = function (node, st, c) { return c(node, st, "Function"); }; +base.VariableDeclaration = function (node, st, c) { + for (var i = 0, list = node.declarations; i < list.length; i += 1) + { + var decl = list[i]; + + c(decl, st); + } +}; +base.VariableDeclarator = function (node, st, c) { + c(node.id, st, "Pattern"); + if (node.init) { c(node.init, st, "Expression"); } +}; + +base.Function = function (node, st, c) { + if (node.id) { c(node.id, st, "Pattern"); } + for (var i = 0, list = node.params; i < list.length; i += 1) + { + var param = list[i]; + + c(param, st, "Pattern"); + } + c(node.body, st, node.expression ? "ScopeExpression" : "ScopeBody"); +}; +// FIXME drop these node types in next major version +// (They are awkward, and in ES6 every block can be a scope.) +base.ScopeBody = function (node, st, c) { return c(node, st, "Statement"); }; +base.ScopeExpression = function (node, st, c) { return c(node, st, "Expression"); }; + +base.Pattern = function (node, st, c) { + if (node.type === "Identifier") + { c(node, st, "VariablePattern"); } + else if (node.type === "MemberExpression") + { c(node, st, "MemberPattern"); } + else + { c(node, st); } +}; +base.VariablePattern = ignore; +base.MemberPattern = skipThrough; +base.RestElement = function (node, st, c) { return c(node.argument, st, "Pattern"); }; +base.ArrayPattern = function (node, st, c) { + for (var i = 0, list = node.elements; i < list.length; i += 1) { + var elt = list[i]; + + if (elt) { c(elt, st, "Pattern"); } + } +}; +base.ObjectPattern = function (node, st, c) { + for (var i = 0, list = node.properties; i < list.length; i += 1) { + var prop = list[i]; + + if (prop.type === "Property") { + if (prop.computed) { c(prop.key, st, "Expression"); } + c(prop.value, st, "Pattern"); + } else if (prop.type === "RestElement") { + c(prop.argument, st, "Pattern"); + } + } +}; + +base.Expression = skipThrough; +base.ThisExpression = base.Super = base.MetaProperty = ignore; +base.ArrayExpression = function (node, st, c) { + for (var i = 0, list = node.elements; i < list.length; i += 1) { + var elt = list[i]; + + if (elt) { c(elt, st, "Expression"); } + } +}; +base.ObjectExpression = function (node, st, c) { + for (var i = 0, list = node.properties; i < list.length; i += 1) + { + var prop = list[i]; + + c(prop, st); + } +}; +base.FunctionExpression = base.ArrowFunctionExpression = base.FunctionDeclaration; +base.SequenceExpression = base.TemplateLiteral = function (node, st, c) { + for (var i = 0, list = node.expressions; i < list.length; i += 1) + { + var expr = list[i]; + + c(expr, st, "Expression"); + } +}; +base.UnaryExpression = base.UpdateExpression = function (node, st, c) { + c(node.argument, st, "Expression"); +}; +base.BinaryExpression = base.LogicalExpression = function (node, st, c) { + c(node.left, st, "Expression"); + c(node.right, st, "Expression"); +}; +base.AssignmentExpression = base.AssignmentPattern = function (node, st, c) { + c(node.left, st, "Pattern"); + c(node.right, st, "Expression"); +}; +base.ConditionalExpression = function (node, st, c) { + c(node.test, st, "Expression"); + c(node.consequent, st, "Expression"); + c(node.alternate, st, "Expression"); +}; +base.NewExpression = base.CallExpression = function (node, st, c) { + c(node.callee, st, "Expression"); + if (node.arguments) + { for (var i = 0, list = node.arguments; i < list.length; i += 1) + { + var arg = list[i]; + + c(arg, st, "Expression"); + } } +}; +base.MemberExpression = function (node, st, c) { + c(node.object, st, "Expression"); + if (node.computed) { c(node.property, st, "Expression"); } +}; +base.ExportNamedDeclaration = base.ExportDefaultDeclaration = function (node, st, c) { + if (node.declaration) + { c(node.declaration, st, node.type === "ExportNamedDeclaration" || node.declaration.id ? "Statement" : "Expression"); } + if (node.source) { c(node.source, st, "Expression"); } +}; +base.ExportAllDeclaration = function (node, st, c) { + c(node.source, st, "Expression"); +}; +base.ImportDeclaration = function (node, st, c) { + for (var i = 0, list = node.specifiers; i < list.length; i += 1) + { + var spec = list[i]; + + c(spec, st); + } + c(node.source, st, "Expression"); +}; +base.ImportSpecifier = base.ImportDefaultSpecifier = base.ImportNamespaceSpecifier = base.Identifier = base.Literal = ignore; + +base.TaggedTemplateExpression = function (node, st, c) { + c(node.tag, st, "Expression"); + c(node.quasi, st, "Expression"); +}; +base.ClassDeclaration = base.ClassExpression = function (node, st, c) { return c(node, st, "Class"); }; +base.Class = function (node, st, c) { + if (node.id) { c(node.id, st, "Pattern"); } + if (node.superClass) { c(node.superClass, st, "Expression"); } + c(node.body, st); +}; +base.ClassBody = function (node, st, c) { + for (var i = 0, list = node.body; i < list.length; i += 1) + { + var elt = list[i]; + + c(elt, st); + } +}; +base.MethodDefinition = base.Property = function (node, st, c) { + if (node.computed) { c(node.key, st, "Expression"); } + c(node.value, st, "Expression"); +}; + +export { simple, ancestor, recursive, full, fullAncestor, findNodeAt, findNodeAround, findNodeAfter, findNodeBefore, make, base }; diff --git a/node_modules/acorn/dist/walk.js b/node_modules/acorn/dist/walk.js new file mode 100644 index 00000000..4f6cb415 --- /dev/null +++ b/node_modules/acorn/dist/walk.js @@ -0,0 +1,443 @@ +(function (global, factory) { + typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) : + typeof define === 'function' && define.amd ? define(['exports'], factory) : + (factory((global.acorn = global.acorn || {}, global.acorn.walk = {}))); +}(this, (function (exports) { 'use strict'; + +// AST walker module for Mozilla Parser API compatible trees + +// A simple walk is one where you simply specify callbacks to be +// called on specific nodes. The last two arguments are optional. A +// simple use would be +// +// walk.simple(myTree, { +// Expression: function(node) { ... } +// }); +// +// to do something with all expressions. All Parser API node types +// can be used to identify node types, as well as Expression, +// Statement, and ScopeBody, which denote categories of nodes. +// +// The base argument can be used to pass a custom (recursive) +// walker, and state can be used to give this walked an initial +// state. + +function simple(node, visitors, baseVisitor, state, override) { + if (!baseVisitor) { baseVisitor = base + ; }(function c(node, st, override) { + var type = override || node.type, found = visitors[type]; + baseVisitor[type](node, st, c); + if (found) { found(node, st); } + })(node, state, override); +} + +// An ancestor walk keeps an array of ancestor nodes (including the +// current node) and passes them to the callback as third parameter +// (and also as state parameter when no other state is present). +function ancestor(node, visitors, baseVisitor, state) { + var ancestors = []; + if (!baseVisitor) { baseVisitor = base + ; }(function c(node, st, override) { + var type = override || node.type, found = visitors[type]; + var isNew = node !== ancestors[ancestors.length - 1]; + if (isNew) { ancestors.push(node); } + baseVisitor[type](node, st, c); + if (found) { found(node, st || ancestors, ancestors); } + if (isNew) { ancestors.pop(); } + })(node, state); +} + +// A recursive walk is one where your functions override the default +// walkers. They can modify and replace the state parameter that's +// threaded through the walk, and can opt how and whether to walk +// their child nodes (by calling their third argument on these +// nodes). +function recursive(node, state, funcs, baseVisitor, override) { + var visitor = funcs ? make(funcs, baseVisitor || undefined) : baseVisitor;(function c(node, st, override) { + visitor[override || node.type](node, st, c); + })(node, state, override); +} + +function makeTest(test) { + if (typeof test === "string") + { return function (type) { return type === test; } } + else if (!test) + { return function () { return true; } } + else + { return test } +} + +var Found = function Found(node, state) { this.node = node; this.state = state; }; + +// A full walk triggers the callback on each node +function full(node, callback, baseVisitor, state, override) { + if (!baseVisitor) { baseVisitor = base + ; }(function c(node, st, override) { + var type = override || node.type; + baseVisitor[type](node, st, c); + if (!override) { callback(node, st, type); } + })(node, state, override); +} + +// An fullAncestor walk is like an ancestor walk, but triggers +// the callback on each node +function fullAncestor(node, callback, baseVisitor, state) { + if (!baseVisitor) { baseVisitor = base; } + var ancestors = [];(function c(node, st, override) { + var type = override || node.type; + var isNew = node !== ancestors[ancestors.length - 1]; + if (isNew) { ancestors.push(node); } + baseVisitor[type](node, st, c); + if (!override) { callback(node, st || ancestors, ancestors, type); } + if (isNew) { ancestors.pop(); } + })(node, state); +} + +// Find a node with a given start, end, and type (all are optional, +// null can be used as wildcard). Returns a {node, state} object, or +// undefined when it doesn't find a matching node. +function findNodeAt(node, start, end, test, baseVisitor, state) { + if (!baseVisitor) { baseVisitor = base; } + test = makeTest(test); + try { + (function c(node, st, override) { + var type = override || node.type; + if ((start == null || node.start <= start) && + (end == null || node.end >= end)) + { baseVisitor[type](node, st, c); } + if ((start == null || node.start === start) && + (end == null || node.end === end) && + test(type, node)) + { throw new Found(node, st) } + })(node, state); + } catch (e) { + if (e instanceof Found) { return e } + throw e + } +} + +// Find the innermost node of a given type that contains the given +// position. Interface similar to findNodeAt. +function findNodeAround(node, pos, test, baseVisitor, state) { + test = makeTest(test); + if (!baseVisitor) { baseVisitor = base; } + try { + (function c(node, st, override) { + var type = override || node.type; + if (node.start > pos || node.end < pos) { return } + baseVisitor[type](node, st, c); + if (test(type, node)) { throw new Found(node, st) } + })(node, state); + } catch (e) { + if (e instanceof Found) { return e } + throw e + } +} + +// Find the outermost matching node after a given position. +function findNodeAfter(node, pos, test, baseVisitor, state) { + test = makeTest(test); + if (!baseVisitor) { baseVisitor = base; } + try { + (function c(node, st, override) { + if (node.end < pos) { return } + var type = override || node.type; + if (node.start >= pos && test(type, node)) { throw new Found(node, st) } + baseVisitor[type](node, st, c); + })(node, state); + } catch (e) { + if (e instanceof Found) { return e } + throw e + } +} + +// Find the outermost matching node before a given position. +function findNodeBefore(node, pos, test, baseVisitor, state) { + test = makeTest(test); + if (!baseVisitor) { baseVisitor = base; } + var max;(function c(node, st, override) { + if (node.start > pos) { return } + var type = override || node.type; + if (node.end <= pos && (!max || max.node.end < node.end) && test(type, node)) + { max = new Found(node, st); } + baseVisitor[type](node, st, c); + })(node, state); + return max +} + +// Fallback to an Object.create polyfill for older environments. +var create = Object.create || function(proto) { + function Ctor() {} + Ctor.prototype = proto; + return new Ctor +}; + +// Used to create a custom walker. Will fill in all missing node +// type properties with the defaults. +function make(funcs, baseVisitor) { + var visitor = create(baseVisitor || base); + for (var type in funcs) { visitor[type] = funcs[type]; } + return visitor +} + +function skipThrough(node, st, c) { c(node, st); } +function ignore(_node, _st, _c) {} + +// Node walkers. + +var base = {}; + +base.Program = base.BlockStatement = function (node, st, c) { + for (var i = 0, list = node.body; i < list.length; i += 1) + { + var stmt = list[i]; + + c(stmt, st, "Statement"); + } +}; +base.Statement = skipThrough; +base.EmptyStatement = ignore; +base.ExpressionStatement = base.ParenthesizedExpression = + function (node, st, c) { return c(node.expression, st, "Expression"); }; +base.IfStatement = function (node, st, c) { + c(node.test, st, "Expression"); + c(node.consequent, st, "Statement"); + if (node.alternate) { c(node.alternate, st, "Statement"); } +}; +base.LabeledStatement = function (node, st, c) { return c(node.body, st, "Statement"); }; +base.BreakStatement = base.ContinueStatement = ignore; +base.WithStatement = function (node, st, c) { + c(node.object, st, "Expression"); + c(node.body, st, "Statement"); +}; +base.SwitchStatement = function (node, st, c) { + c(node.discriminant, st, "Expression"); + for (var i = 0, list = node.cases; i < list.length; i += 1) { + var cs = list[i]; + + if (cs.test) { c(cs.test, st, "Expression"); } + for (var i$1 = 0, list$1 = cs.consequent; i$1 < list$1.length; i$1 += 1) + { + var cons = list$1[i$1]; + + c(cons, st, "Statement"); + } + } +}; +base.SwitchCase = function (node, st, c) { + if (node.test) { c(node.test, st, "Expression"); } + for (var i = 0, list = node.consequent; i < list.length; i += 1) + { + var cons = list[i]; + + c(cons, st, "Statement"); + } +}; +base.ReturnStatement = base.YieldExpression = base.AwaitExpression = function (node, st, c) { + if (node.argument) { c(node.argument, st, "Expression"); } +}; +base.ThrowStatement = base.SpreadElement = + function (node, st, c) { return c(node.argument, st, "Expression"); }; +base.TryStatement = function (node, st, c) { + c(node.block, st, "Statement"); + if (node.handler) { c(node.handler, st); } + if (node.finalizer) { c(node.finalizer, st, "Statement"); } +}; +base.CatchClause = function (node, st, c) { + if (node.param) { c(node.param, st, "Pattern"); } + c(node.body, st, "ScopeBody"); +}; +base.WhileStatement = base.DoWhileStatement = function (node, st, c) { + c(node.test, st, "Expression"); + c(node.body, st, "Statement"); +}; +base.ForStatement = function (node, st, c) { + if (node.init) { c(node.init, st, "ForInit"); } + if (node.test) { c(node.test, st, "Expression"); } + if (node.update) { c(node.update, st, "Expression"); } + c(node.body, st, "Statement"); +}; +base.ForInStatement = base.ForOfStatement = function (node, st, c) { + c(node.left, st, "ForInit"); + c(node.right, st, "Expression"); + c(node.body, st, "Statement"); +}; +base.ForInit = function (node, st, c) { + if (node.type === "VariableDeclaration") { c(node, st); } + else { c(node, st, "Expression"); } +}; +base.DebuggerStatement = ignore; + +base.FunctionDeclaration = function (node, st, c) { return c(node, st, "Function"); }; +base.VariableDeclaration = function (node, st, c) { + for (var i = 0, list = node.declarations; i < list.length; i += 1) + { + var decl = list[i]; + + c(decl, st); + } +}; +base.VariableDeclarator = function (node, st, c) { + c(node.id, st, "Pattern"); + if (node.init) { c(node.init, st, "Expression"); } +}; + +base.Function = function (node, st, c) { + if (node.id) { c(node.id, st, "Pattern"); } + for (var i = 0, list = node.params; i < list.length; i += 1) + { + var param = list[i]; + + c(param, st, "Pattern"); + } + c(node.body, st, node.expression ? "ScopeExpression" : "ScopeBody"); +}; +// FIXME drop these node types in next major version +// (They are awkward, and in ES6 every block can be a scope.) +base.ScopeBody = function (node, st, c) { return c(node, st, "Statement"); }; +base.ScopeExpression = function (node, st, c) { return c(node, st, "Expression"); }; + +base.Pattern = function (node, st, c) { + if (node.type === "Identifier") + { c(node, st, "VariablePattern"); } + else if (node.type === "MemberExpression") + { c(node, st, "MemberPattern"); } + else + { c(node, st); } +}; +base.VariablePattern = ignore; +base.MemberPattern = skipThrough; +base.RestElement = function (node, st, c) { return c(node.argument, st, "Pattern"); }; +base.ArrayPattern = function (node, st, c) { + for (var i = 0, list = node.elements; i < list.length; i += 1) { + var elt = list[i]; + + if (elt) { c(elt, st, "Pattern"); } + } +}; +base.ObjectPattern = function (node, st, c) { + for (var i = 0, list = node.properties; i < list.length; i += 1) { + var prop = list[i]; + + if (prop.type === "Property") { + if (prop.computed) { c(prop.key, st, "Expression"); } + c(prop.value, st, "Pattern"); + } else if (prop.type === "RestElement") { + c(prop.argument, st, "Pattern"); + } + } +}; + +base.Expression = skipThrough; +base.ThisExpression = base.Super = base.MetaProperty = ignore; +base.ArrayExpression = function (node, st, c) { + for (var i = 0, list = node.elements; i < list.length; i += 1) { + var elt = list[i]; + + if (elt) { c(elt, st, "Expression"); } + } +}; +base.ObjectExpression = function (node, st, c) { + for (var i = 0, list = node.properties; i < list.length; i += 1) + { + var prop = list[i]; + + c(prop, st); + } +}; +base.FunctionExpression = base.ArrowFunctionExpression = base.FunctionDeclaration; +base.SequenceExpression = base.TemplateLiteral = function (node, st, c) { + for (var i = 0, list = node.expressions; i < list.length; i += 1) + { + var expr = list[i]; + + c(expr, st, "Expression"); + } +}; +base.UnaryExpression = base.UpdateExpression = function (node, st, c) { + c(node.argument, st, "Expression"); +}; +base.BinaryExpression = base.LogicalExpression = function (node, st, c) { + c(node.left, st, "Expression"); + c(node.right, st, "Expression"); +}; +base.AssignmentExpression = base.AssignmentPattern = function (node, st, c) { + c(node.left, st, "Pattern"); + c(node.right, st, "Expression"); +}; +base.ConditionalExpression = function (node, st, c) { + c(node.test, st, "Expression"); + c(node.consequent, st, "Expression"); + c(node.alternate, st, "Expression"); +}; +base.NewExpression = base.CallExpression = function (node, st, c) { + c(node.callee, st, "Expression"); + if (node.arguments) + { for (var i = 0, list = node.arguments; i < list.length; i += 1) + { + var arg = list[i]; + + c(arg, st, "Expression"); + } } +}; +base.MemberExpression = function (node, st, c) { + c(node.object, st, "Expression"); + if (node.computed) { c(node.property, st, "Expression"); } +}; +base.ExportNamedDeclaration = base.ExportDefaultDeclaration = function (node, st, c) { + if (node.declaration) + { c(node.declaration, st, node.type === "ExportNamedDeclaration" || node.declaration.id ? "Statement" : "Expression"); } + if (node.source) { c(node.source, st, "Expression"); } +}; +base.ExportAllDeclaration = function (node, st, c) { + c(node.source, st, "Expression"); +}; +base.ImportDeclaration = function (node, st, c) { + for (var i = 0, list = node.specifiers; i < list.length; i += 1) + { + var spec = list[i]; + + c(spec, st); + } + c(node.source, st, "Expression"); +}; +base.ImportSpecifier = base.ImportDefaultSpecifier = base.ImportNamespaceSpecifier = base.Identifier = base.Literal = ignore; + +base.TaggedTemplateExpression = function (node, st, c) { + c(node.tag, st, "Expression"); + c(node.quasi, st, "Expression"); +}; +base.ClassDeclaration = base.ClassExpression = function (node, st, c) { return c(node, st, "Class"); }; +base.Class = function (node, st, c) { + if (node.id) { c(node.id, st, "Pattern"); } + if (node.superClass) { c(node.superClass, st, "Expression"); } + c(node.body, st); +}; +base.ClassBody = function (node, st, c) { + for (var i = 0, list = node.body; i < list.length; i += 1) + { + var elt = list[i]; + + c(elt, st); + } +}; +base.MethodDefinition = base.Property = function (node, st, c) { + if (node.computed) { c(node.key, st, "Expression"); } + c(node.value, st, "Expression"); +}; + +exports.simple = simple; +exports.ancestor = ancestor; +exports.recursive = recursive; +exports.full = full; +exports.fullAncestor = fullAncestor; +exports.findNodeAt = findNodeAt; +exports.findNodeAround = findNodeAround; +exports.findNodeAfter = findNodeAfter; +exports.findNodeBefore = findNodeBefore; +exports.make = make; +exports.base = base; + +Object.defineProperty(exports, '__esModule', { value: true }); + +}))); diff --git a/node_modules/acorn/package.json b/node_modules/acorn/package.json new file mode 100644 index 00000000..f56ba73c --- /dev/null +++ b/node_modules/acorn/package.json @@ -0,0 +1,60 @@ +{ + "name": "acorn", + "description": "ECMAScript parser", + "homepage": "https://github.com/acornjs/acorn", + "main": "dist/acorn.js", + "module": "dist/acorn.es.js", + "version": "5.7.3", + "engines": { + "node": ">=0.4.0" + }, + "maintainers": [ + { + "name": "Marijn Haverbeke", + "email": "marijnh@gmail.com", + "web": "http://marijnhaverbeke.nl" + }, + { + "name": "Ingvar Stepanyan", + "email": "me@rreverser.com", + "web": "http://rreverser.com/" + }, + { + "name": "Adrian Heine", + "email": "http://adrianheine.de" + } + ], + "repository": { + "type": "git", + "url": "https://github.com/acornjs/acorn.git" + }, + "license": "MIT", + "scripts": { + "prepare": "npm run build && node test/run.js && node test/lint.js", + "test": "node test/run.js && node test/lint.js", + "pretest": "npm run build:main && npm run build:loose", + "test:test262": "node bin/run_test262.js", + "build": "npm run build:main && npm run build:walk && npm run build:loose && npm run build:bin", + "build:main": "rollup -c rollup/config.main.js", + "build:walk": "rollup -c rollup/config.walk.js", + "build:loose": "rollup -c rollup/config.loose.js && rollup -c rollup/config.loose_es.js", + "build:bin": "rollup -c rollup/config.bin.js", + "lint": "eslint src/" + }, + "bin": { + "acorn": "./bin/acorn" + }, + "devDependencies": { + "eslint": "^4.10.0", + "eslint-config-standard": "^10.2.1", + "eslint-plugin-import": "^2.2.0", + "eslint-plugin-node": "^5.2.1", + "eslint-plugin-promise": "^3.5.0", + "eslint-plugin-standard": "^3.0.1", + "rollup": "^0.45.0", + "rollup-plugin-buble": "^0.16.0", + "test262": "git+https://github.com/tc39/test262.git#3bfad28cc302fd4455badcfcbca7c5bb7ce41a72", + "test262-parser-runner": "^0.4.0", + "unicode-11.0.0": "^0.7.7" + } +} |