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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-proposal-async-generator-functions
parent2c77f00f1a7ecb6c8192f9c16d3b2001b254a107 (diff)
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Diffstat (limited to 'node_modules/@babel/plugin-proposal-async-generator-functions')
-rw-r--r--node_modules/@babel/plugin-proposal-async-generator-functions/README.md107
-rw-r--r--node_modules/@babel/plugin-proposal-async-generator-functions/lib/for-await.js95
-rw-r--r--node_modules/@babel/plugin-proposal-async-generator-functions/lib/index.js128
-rw-r--r--node_modules/@babel/plugin-proposal-async-generator-functions/package.json23
4 files changed, 353 insertions, 0 deletions
diff --git a/node_modules/@babel/plugin-proposal-async-generator-functions/README.md b/node_modules/@babel/plugin-proposal-async-generator-functions/README.md
new file mode 100644
index 00000000..543d5bfc
--- /dev/null
+++ b/node_modules/@babel/plugin-proposal-async-generator-functions/README.md
@@ -0,0 +1,107 @@
+# @babel/plugin-proposal-async-generator-functions
+
+> Turn async generator functions and for-await statements to ES2015 generators
+
+## Example
+
+**In**
+
+```javascript
+async function* agf() {
+ await 1;
+ yield 2;
+}
+```
+
+**Out**
+
+```javascript
+var _asyncGenerator = ...
+
+let agf = (() => {
+ var _ref = _asyncGenerator.wrap(function* () {
+ yield _asyncGenerator.await(1);
+ yield 2;
+ });
+
+ return function agf() {
+ return _ref.apply(this, arguments);
+ };
+})();
+```
+
+For await example
+
+```js
+async function f() {
+ for await (let x of y) {
+ g(x);
+ }
+}
+```
+
+**Example Usage**
+
+```js
+async function* genAnswers() {
+ var stream = [ Promise.resolve(4), Promise.resolve(9), Promise.resolve(12) ];
+ var total = 0;
+ for await (let val of stream) {
+ total += await val;
+ yield total;
+ }
+}
+
+function forEach(ai, fn) {
+ return ai.next().then(function (r) {
+ if (!r.done) {
+ fn(r);
+ return forEach(ai, fn);
+ }
+ });
+}
+
+var output = 0;
+forEach(genAnswers(), function(val) { output += val.value })
+.then(function () {
+ console.log(output); // 42
+});
+```
+
+[Try it Out in the REPL](https://babeljs.io/repl/#?babili=false&evaluate=true&lineWrap=false&presets=stage-3&code=async%20function*%20genAnswers()%20%7B%0A%20%20var%20stream%20%3D%20%5B%20Promise.resolve(4)%2C%20Promise.resolve(9)%2C%20Promise.resolve(12)%20%5D%3B%0A%20%20var%20total%20%3D%200%3B%0A%20%20for%20await%20(let%20val%20of%20stream)%20%7B%0A%20%20%20%20total%20%2B%3D%20await%20val%3B%0A%20%20%20%20yield%20total%3B%0A%20%20%7D%0A%7D%0A%0Afunction%20forEach(ai%2C%20fn)%20%7B%0A%20%20return%20ai.next().then(function%20(r)%20%7B%0A%20%20%20%20if%20(!r.done)%20%7B%0A%20%20%20%20%20%20fn(r)%3B%0A%20%20%20%20%20%20return%20forEach(ai%2C%20fn)%3B%0A%20%20%20%20%7D%0A%20%20%7D)%3B%0A%7D%0A%0Avar%20output%20%3D%200%3B%0AforEach(genAnswers()%2C%20function(val)%20%7B%20output%20%2B%3D%20val.value%20%7D)%0A.then(function%20()%20%7B%0A%20%20console.log(output)%3B%20%2F%2F%2042%0A%7D)%3B&experimental=true&loose=false&spec=false&playground=true&stage=0)
+
+## Installation
+
+```sh
+npm install --save-dev @babel/plugin-proposal-async-generator-functions
+```
+
+## Usage
+
+### Via `.babelrc` (Recommended)
+
+**.babelrc**
+
+```json
+{
+ "plugins": ["@babel/plugin-proposal-async-generator-functions"]
+}
+```
+
+### Via CLI
+
+```sh
+babel --plugins @babel/plugin-proposal-async-generator-functions script.js
+```
+
+### Via Node API
+
+```javascript
+require("@babel/core").transform("code", {
+ plugins: ["@babel/plugin-proposal-async-generator-functions"]
+});
+```
+
+## References
+
+* [Proposal: Asynchronous iteration for ECMAScript](https://github.com/tc39/proposal-async-iteration)
diff --git a/node_modules/@babel/plugin-proposal-async-generator-functions/lib/for-await.js b/node_modules/@babel/plugin-proposal-async-generator-functions/lib/for-await.js
new file mode 100644
index 00000000..54571bc3
--- /dev/null
+++ b/node_modules/@babel/plugin-proposal-async-generator-functions/lib/for-await.js
@@ -0,0 +1,95 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+ value: true
+});
+exports.default = _default;
+
+function _core() {
+ const data = require("@babel/core");
+
+ _core = function _core() {
+ return data;
+ };
+
+ return data;
+}
+
+const buildForAwait = (0, _core().template)(`
+ async function wrapper() {
+ var ITERATOR_COMPLETION = true;
+ var ITERATOR_HAD_ERROR_KEY = false;
+ var ITERATOR_ERROR_KEY;
+ try {
+ for (
+ var ITERATOR_KEY = GET_ITERATOR(OBJECT), STEP_KEY, STEP_VALUE;
+ (
+ STEP_KEY = await ITERATOR_KEY.next(),
+ ITERATOR_COMPLETION = STEP_KEY.done,
+ STEP_VALUE = await STEP_KEY.value,
+ !ITERATOR_COMPLETION
+ );
+ ITERATOR_COMPLETION = true) {
+ }
+ } catch (err) {
+ ITERATOR_HAD_ERROR_KEY = true;
+ ITERATOR_ERROR_KEY = err;
+ } finally {
+ try {
+ if (!ITERATOR_COMPLETION && ITERATOR_KEY.return != null) {
+ await ITERATOR_KEY.return();
+ }
+ } finally {
+ if (ITERATOR_HAD_ERROR_KEY) {
+ throw ITERATOR_ERROR_KEY;
+ }
+ }
+ }
+ }
+`);
+
+function _default(path, {
+ getAsyncIterator
+}) {
+ const node = path.node,
+ scope = path.scope,
+ parent = path.parent;
+ const stepKey = scope.generateUidIdentifier("step");
+ const stepValue = scope.generateUidIdentifier("value");
+ const left = node.left;
+ let declar;
+
+ 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)]);
+ }
+
+ let template = buildForAwait({
+ ITERATOR_HAD_ERROR_KEY: scope.generateUidIdentifier("didIteratorError"),
+ ITERATOR_COMPLETION: scope.generateUidIdentifier("iteratorNormalCompletion"),
+ ITERATOR_ERROR_KEY: scope.generateUidIdentifier("iteratorError"),
+ ITERATOR_KEY: scope.generateUidIdentifier("iterator"),
+ GET_ITERATOR: getAsyncIterator,
+ OBJECT: node.right,
+ STEP_VALUE: stepValue,
+ STEP_KEY: stepKey
+ });
+ template = template.body.body;
+
+ 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,
+ node: template,
+ declar,
+ loop
+ };
+} \ No newline at end of file
diff --git a/node_modules/@babel/plugin-proposal-async-generator-functions/lib/index.js b/node_modules/@babel/plugin-proposal-async-generator-functions/lib/index.js
new file mode 100644
index 00000000..534575b8
--- /dev/null
+++ b/node_modules/@babel/plugin-proposal-async-generator-functions/lib/index.js
@@ -0,0 +1,128 @@
+"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 _helperRemapAsyncToGenerator() {
+ const data = _interopRequireDefault(require("@babel/helper-remap-async-to-generator"));
+
+ _helperRemapAsyncToGenerator = function _helperRemapAsyncToGenerator() {
+ return data;
+ };
+
+ return data;
+}
+
+function _pluginSyntaxAsyncGenerators() {
+ const data = _interopRequireDefault(require("@babel/plugin-syntax-async-generators"));
+
+ _pluginSyntaxAsyncGenerators = function _pluginSyntaxAsyncGenerators() {
+ return data;
+ };
+
+ return data;
+}
+
+function _core() {
+ const data = require("@babel/core");
+
+ _core = function _core() {
+ return data;
+ };
+
+ return data;
+}
+
+var _forAwait = _interopRequireDefault(require("./for-await"));
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+var _default = (0, _helperPluginUtils().declare)(api => {
+ api.assertVersion(7);
+ const yieldStarVisitor = {
+ Function(path) {
+ path.skip();
+ },
+
+ YieldExpression({
+ node
+ }, state) {
+ if (!node.delegate) return;
+ const callee = state.addHelper("asyncGeneratorDelegate");
+ node.argument = _core().types.callExpression(callee, [_core().types.callExpression(state.addHelper("asyncIterator"), [node.argument]), state.addHelper("awaitAsyncGenerator")]);
+ }
+
+ };
+ const forAwaitVisitor = {
+ Function(path) {
+ path.skip();
+ },
+
+ ForOfStatement(path, {
+ file
+ }) {
+ const node = path.node;
+ if (!node.await) return;
+ const build = (0, _forAwait.default)(path, {
+ getAsyncIterator: file.addHelper("asyncIterator")
+ });
+ const declar = build.declar,
+ 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);
+ } else {
+ path.replaceWithMultiple(build.node);
+ }
+ }
+
+ };
+ const visitor = {
+ Function(path, state) {
+ if (!path.node.async) return;
+ path.traverse(forAwaitVisitor, state);
+ if (!path.node.generator) return;
+ path.traverse(yieldStarVisitor, state);
+ (0, _helperRemapAsyncToGenerator().default)(path, {
+ wrapAsync: state.addHelper("wrapAsyncGenerator"),
+ wrapAwait: state.addHelper("awaitAsyncGenerator")
+ });
+ }
+
+ };
+ return {
+ inherits: _pluginSyntaxAsyncGenerators().default,
+ visitor: {
+ Program(path, state) {
+ path.traverse(visitor, state);
+ }
+
+ }
+ };
+});
+
+exports.default = _default; \ No newline at end of file
diff --git a/node_modules/@babel/plugin-proposal-async-generator-functions/package.json b/node_modules/@babel/plugin-proposal-async-generator-functions/package.json
new file mode 100644
index 00000000..6afb5c38
--- /dev/null
+++ b/node_modules/@babel/plugin-proposal-async-generator-functions/package.json
@@ -0,0 +1,23 @@
+{
+ "name": "@babel/plugin-proposal-async-generator-functions",
+ "version": "7.0.0-beta.47",
+ "description": "Turn async generator functions into ES2015 generators",
+ "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-proposal-async-generator-functions",
+ "license": "MIT",
+ "main": "lib/index.js",
+ "keywords": [
+ "babel-plugin"
+ ],
+ "dependencies": {
+ "@babel/helper-plugin-utils": "7.0.0-beta.47",
+ "@babel/helper-remap-async-to-generator": "7.0.0-beta.47",
+ "@babel/plugin-syntax-async-generators": "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"
+ }
+}