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authorruki <waruqi@gmail.com>2018-11-08 00:38:48 +0800
committerruki <waruqi@gmail.com>2018-11-07 21:53:09 +0800
commit26105034da4fcce7ac883c899d781f016559310d (patch)
treec459a5dc4e3aa0972d9919033ece511ce76dd129 /node_modules/@babel/plugin-transform-for-of
parent2c77f00f1a7ecb6c8192f9c16d3b2001b254a107 (diff)
downloadxmake-docs-26105034da4fcce7ac883c899d781f016559310d.tar.gz
xmake-docs-26105034da4fcce7ac883c899d781f016559310d.zip
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Diffstat (limited to 'node_modules/@babel/plugin-transform-for-of')
-rw-r--r--node_modules/@babel/plugin-transform-for-of/README.md154
-rw-r--r--node_modules/@babel/plugin-transform-for-of/lib/index.js301
-rw-r--r--node_modules/@babel/plugin-transform-for-of/package.json21
3 files changed, 476 insertions, 0 deletions
diff --git a/node_modules/@babel/plugin-transform-for-of/README.md b/node_modules/@babel/plugin-transform-for-of/README.md
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+++ b/node_modules/@babel/plugin-transform-for-of/README.md
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+# @babel/plugin-transform-for-of
+
+> Compile ES2015 for...of to ES5
+
+## Example
+
+**In**
+
+```js
+for (var i of foo) {}
+```
+
+**Out**
+
+```js
+var _iteratorNormalCompletion = true;
+var _didIteratorError = false;
+var _iteratorError = undefined;
+
+try {
+ for (var _iterator = foo[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
+ var i = _step.value;
+ }
+} catch (err) {
+ _didIteratorError = true;
+ _iteratorError = err;
+} finally {
+ try {
+ if (!_iteratorNormalCompletion && _iterator.return != null) {
+ _iterator.return();
+ }
+ } finally {
+ if (_didIteratorError) {
+ throw _iteratorError;
+ }
+ }
+}
+```
+
+## Installation
+
+```sh
+npm install --save-dev @babel/plugin-transform-for-of
+```
+
+## Usage
+
+### Via `.babelrc` (Recommended)
+
+**.babelrc**
+
+Without options:
+
+```js
+{
+ "plugins": ["@babel/plugin-transform-for-of"]
+}
+```
+
+With options:
+
+```js
+{
+ "plugins": [
+ ["@babel/plugin-transform-for-of", {
+ "loose": true, // defaults to false
+ "assumeArray": true // defaults to false
+ }]
+ ]
+}
+```
+
+### Via CLI
+
+```sh
+babel --plugins @babel/plugin-transform-for-of script.js
+```
+
+### Via Node API
+
+```javascript
+require("@babel/core").transform("code", {
+ plugins: ["@babel/plugin-transform-for-of"]
+});
+```
+
+## Options
+
+### `loose`
+
+`boolean`, defaults to `false`
+
+In loose mode, arrays are put in a fast path, thus heavily increasing performance.
+All other iterables will continue to work fine.
+
+#### Example
+
+**In**
+
+```js
+for (var i of foo) {}
+```
+
+**Out**
+
+```js
+for (var _iterator = foo, _isArray = Array.isArray(_iterator), _i = 0, _iterator = _isArray ? _iterator : _iterator[Symbol.iterator]();;) {
+ var _ref;
+
+ if (_isArray) {
+ if (_i >= _iterator.length) break;
+ _ref = _iterator[_i++];
+ } else {
+ _i = _iterator.next();
+ if (_i.done) break;
+ _ref = _i.value;
+ }
+
+ var i = _ref;
+}
+```
+
+#### Abrupt completions
+
+In loose mode an iterator's `return` method will not be called on abrupt completions caused by thrown errors.
+
+Please see [google/traceur-compiler#1773](https://github.com/google/traceur-compiler/issues/1773) and
+[babel/babel#838](https://github.com/babel/babel/issues/838) for more information.
+
+### `assumeArray`
+`boolean`, defaults to `false`
+
+This will apply the optimization shown below to all for-of loops by assuming that _all_ loops are arrays.
+
+Can be useful when you just want a for-of loop to represent a basic for loop over an array.
+
+### Optimization
+
+If a basic array is used, Babel will compile the for-of loop down to a regular for loop.
+
+**In**
+
+```js
+for (let a of [1,2,3]) {}
+```
+
+**Out**
+
+```js
+var _arr = [1, 2, 3];
+for (var _i = 0; _i < _arr.length; _i++) {
+ var a = _arr[_i];
+}
+```
diff --git a/node_modules/@babel/plugin-transform-for-of/lib/index.js b/node_modules/@babel/plugin-transform-for-of/lib/index.js
new file mode 100644
index 00000000..cd3a4610
--- /dev/null
+++ b/node_modules/@babel/plugin-transform-for-of/lib/index.js
@@ -0,0 +1,301 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+ value: true
+});
+exports.default = void 0;
+
+function _helperPluginUtils() {
+ const data = require("@babel/helper-plugin-utils");
+
+ _helperPluginUtils = function _helperPluginUtils() {
+ return data;
+ };
+
+ return data;
+}
+
+function _core() {
+ const data = require("@babel/core");
+
+ _core = function _core() {
+ return data;
+ };
+
+ return data;
+}
+
+var _default = (0, _helperPluginUtils().declare)((api, options) => {
+ api.assertVersion(7);
+ const loose = options.loose,
+ assumeArray = options.assumeArray;
+
+ if (loose === true && assumeArray === true) {
+ throw new Error(`The loose and assumeArray options cannot be used together in @babel/plugin-transform-for-of`);
+ }
+
+ if (assumeArray) {
+ return {
+ visitor: {
+ ForOfStatement(path) {
+ const scope = path.scope;
+ const _path$node = path.node,
+ left = _path$node.left,
+ right = _path$node.right,
+ body = _path$node.body;
+ const i = scope.generateUidIdentifier("i");
+ let array = scope.maybeGenerateMemoised(right, true);
+ const inits = [_core().types.variableDeclarator(i, _core().types.numericLiteral(0))];
+
+ if (array) {
+ inits.push(_core().types.variableDeclarator(array, right));
+ } else {
+ array = right;
+ }
+
+ const item = _core().types.memberExpression(_core().types.cloneNode(array), _core().types.cloneNode(i), true);
+
+ let assignment;
+
+ if (_core().types.isVariableDeclaration(left)) {
+ assignment = left;
+ assignment.declarations[0].init = item;
+ } else {
+ assignment = _core().types.expressionStatement(_core().types.assignmentExpression("=", left, item));
+ }
+
+ const block = _core().types.toBlock(body);
+
+ block.body.unshift(assignment);
+ path.replaceWith(_core().types.forStatement(_core().types.variableDeclaration("let", inits), _core().types.binaryExpression("<", _core().types.cloneNode(i), _core().types.memberExpression(_core().types.cloneNode(array), _core().types.identifier("length"))), _core().types.updateExpression("++", _core().types.cloneNode(i)), block));
+ }
+
+ }
+ };
+ }
+
+ const pushComputedProps = loose ? pushComputedPropsLoose : pushComputedPropsSpec;
+ const buildForOfArray = (0, _core().template)(`
+ for (var KEY = 0; KEY < ARR.length; KEY++) BODY;
+ `);
+ const buildForOfLoose = (0, _core().template)(`
+ for (var LOOP_OBJECT = OBJECT,
+ IS_ARRAY = Array.isArray(LOOP_OBJECT),
+ INDEX = 0,
+ LOOP_OBJECT = IS_ARRAY ? LOOP_OBJECT : LOOP_OBJECT[Symbol.iterator]();;) {
+ INTERMEDIATE;
+ if (IS_ARRAY) {
+ if (INDEX >= LOOP_OBJECT.length) break;
+ ID = LOOP_OBJECT[INDEX++];
+ } else {
+ INDEX = LOOP_OBJECT.next();
+ if (INDEX.done) break;
+ ID = INDEX.value;
+ }
+ }
+ `);
+ const buildForOf = (0, _core().template)(`
+ var ITERATOR_COMPLETION = true;
+ var ITERATOR_HAD_ERROR_KEY = false;
+ var ITERATOR_ERROR_KEY = undefined;
+ try {
+ for (
+ var ITERATOR_KEY = OBJECT[Symbol.iterator](), STEP_KEY;
+ !(ITERATOR_COMPLETION = (STEP_KEY = ITERATOR_KEY.next()).done);
+ ITERATOR_COMPLETION = true
+ ) {}
+ } catch (err) {
+ ITERATOR_HAD_ERROR_KEY = true;
+ ITERATOR_ERROR_KEY = err;
+ } finally {
+ try {
+ if (!ITERATOR_COMPLETION && ITERATOR_KEY.return != null) {
+ ITERATOR_KEY.return();
+ }
+ } finally {
+ if (ITERATOR_HAD_ERROR_KEY) {
+ throw ITERATOR_ERROR_KEY;
+ }
+ }
+ }
+ `);
+
+ function _ForOfStatementArray(path) {
+ const node = path.node,
+ scope = path.scope;
+ const nodes = [];
+ let right = node.right;
+
+ if (!_core().types.isIdentifier(right) || !scope.hasBinding(right.name)) {
+ const uid = scope.generateUid("arr");
+ nodes.push(_core().types.variableDeclaration("var", [_core().types.variableDeclarator(_core().types.identifier(uid), right)]));
+ right = _core().types.identifier(uid);
+ }
+
+ const iterationKey = scope.generateUidIdentifier("i");
+ let loop = buildForOfArray({
+ BODY: node.body,
+ KEY: iterationKey,
+ ARR: right
+ });
+
+ _core().types.inherits(loop, node);
+
+ _core().types.ensureBlock(loop);
+
+ const iterationValue = _core().types.memberExpression(_core().types.cloneNode(right), _core().types.cloneNode(iterationKey), true);
+
+ const left = node.left;
+
+ if (_core().types.isVariableDeclaration(left)) {
+ left.declarations[0].init = iterationValue;
+ loop.body.body.unshift(left);
+ } else {
+ loop.body.body.unshift(_core().types.expressionStatement(_core().types.assignmentExpression("=", left, iterationValue)));
+ }
+
+ if (path.parentPath.isLabeledStatement()) {
+ loop = _core().types.labeledStatement(path.parentPath.node.label, loop);
+ }
+
+ nodes.push(loop);
+ return nodes;
+ }
+
+ function replaceWithArray(path) {
+ if (path.parentPath.isLabeledStatement()) {
+ path.parentPath.replaceWithMultiple(_ForOfStatementArray(path));
+ } else {
+ path.replaceWithMultiple(_ForOfStatementArray(path));
+ }
+ }
+
+ return {
+ visitor: {
+ ForOfStatement(path, state) {
+ const right = path.get("right");
+
+ if (right.isArrayExpression() || right.isGenericType("Array") || _core().types.isArrayTypeAnnotation(right.getTypeAnnotation())) {
+ replaceWithArray(path);
+ return;
+ }
+
+ const node = path.node;
+ const build = pushComputedProps(path, state);
+ const declar = build.declar;
+ const loop = build.loop;
+ const block = loop.body;
+ path.ensureBlock();
+
+ if (declar) {
+ block.body.push(declar);
+ }
+
+ block.body = block.body.concat(node.body.body);
+
+ _core().types.inherits(loop, node);
+
+ _core().types.inherits(loop.body, node.body);
+
+ if (build.replaceParent) {
+ path.parentPath.replaceWithMultiple(build.node);
+ path.remove();
+ } else {
+ path.replaceWithMultiple(build.node);
+ }
+ }
+
+ }
+ };
+
+ function pushComputedPropsLoose(path, file) {
+ const node = path.node,
+ scope = path.scope,
+ parent = path.parent;
+ const left = node.left;
+ let declar, id, intermediate;
+
+ if (_core().types.isIdentifier(left) || _core().types.isPattern(left) || _core().types.isMemberExpression(left)) {
+ id = left;
+ intermediate = null;
+ } else if (_core().types.isVariableDeclaration(left)) {
+ id = scope.generateUidIdentifier("ref");
+ declar = _core().types.variableDeclaration(left.kind, [_core().types.variableDeclarator(left.declarations[0].id, _core().types.identifier(id.name))]);
+ intermediate = _core().types.variableDeclaration("var", [_core().types.variableDeclarator(_core().types.identifier(id.name))]);
+ } else {
+ throw file.buildCodeFrameError(left, `Unknown node type ${left.type} in ForStatement`);
+ }
+
+ const iteratorKey = scope.generateUidIdentifier("iterator");
+ const isArrayKey = scope.generateUidIdentifier("isArray");
+ const loop = buildForOfLoose({
+ LOOP_OBJECT: iteratorKey,
+ IS_ARRAY: isArrayKey,
+ OBJECT: node.right,
+ INDEX: scope.generateUidIdentifier("i"),
+ ID: id,
+ INTERMEDIATE: intermediate
+ });
+
+ const isLabeledParent = _core().types.isLabeledStatement(parent);
+
+ let labeled;
+
+ if (isLabeledParent) {
+ labeled = _core().types.labeledStatement(parent.label, loop);
+ }
+
+ return {
+ replaceParent: isLabeledParent,
+ declar: declar,
+ node: labeled || loop,
+ loop: loop
+ };
+ }
+
+ function pushComputedPropsSpec(path, file) {
+ const node = path.node,
+ scope = path.scope,
+ parent = path.parent;
+ const left = node.left;
+ let declar;
+ const stepKey = scope.generateUid("step");
+
+ const stepValue = _core().types.memberExpression(_core().types.identifier(stepKey), _core().types.identifier("value"));
+
+ if (_core().types.isIdentifier(left) || _core().types.isPattern(left) || _core().types.isMemberExpression(left)) {
+ declar = _core().types.expressionStatement(_core().types.assignmentExpression("=", left, stepValue));
+ } else if (_core().types.isVariableDeclaration(left)) {
+ declar = _core().types.variableDeclaration(left.kind, [_core().types.variableDeclarator(left.declarations[0].id, stepValue)]);
+ } else {
+ throw file.buildCodeFrameError(left, `Unknown node type ${left.type} in ForStatement`);
+ }
+
+ const template = buildForOf({
+ ITERATOR_HAD_ERROR_KEY: scope.generateUidIdentifier("didIteratorError"),
+ ITERATOR_COMPLETION: scope.generateUidIdentifier("iteratorNormalCompletion"),
+ ITERATOR_ERROR_KEY: scope.generateUidIdentifier("iteratorError"),
+ ITERATOR_KEY: scope.generateUidIdentifier("iterator"),
+ STEP_KEY: _core().types.identifier(stepKey),
+ OBJECT: node.right
+ });
+
+ const isLabeledParent = _core().types.isLabeledStatement(parent);
+
+ const tryBody = template[3].block.body;
+ const loop = tryBody[0];
+
+ if (isLabeledParent) {
+ tryBody[0] = _core().types.labeledStatement(parent.label, loop);
+ }
+
+ return {
+ replaceParent: isLabeledParent,
+ declar: declar,
+ loop: loop,
+ node: template
+ };
+ }
+});
+
+exports.default = _default; \ No newline at end of file
diff --git a/node_modules/@babel/plugin-transform-for-of/package.json b/node_modules/@babel/plugin-transform-for-of/package.json
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+++ b/node_modules/@babel/plugin-transform-for-of/package.json
@@ -0,0 +1,21 @@
+{
+ "name": "@babel/plugin-transform-for-of",
+ "version": "7.0.0-beta.47",
+ "description": "Compile ES2015 for...of to ES5",
+ "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-for-of",
+ "license": "MIT",
+ "main": "lib/index.js",
+ "keywords": [
+ "babel-plugin"
+ ],
+ "dependencies": {
+ "@babel/helper-plugin-utils": "7.0.0-beta.47"
+ },
+ "peerDependencies": {
+ "@babel/core": "7.0.0-beta.47"
+ },
+ "devDependencies": {
+ "@babel/core": "7.0.0-beta.47",
+ "@babel/helper-plugin-test-runner": "7.0.0-beta.47"
+ }
+}