Rename all proposal plugins to -proposal- from -transform- (#6570)

packages/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/proposal-async-generator-functions"]
+}
+```
+
+### Via CLI
+
+```sh
+babel --plugins @babel/proposal-async-generator-functions script.js
+```
+
+### Via Node API
+
+```javascript
+require("@babel/core").transform("code", {
+  plugins: ["@babel/proposal-async-generator-functions"]
+});
+```
+
+## References
+
+* [Proposal: Asynchronous iteration for ECMAScript](https://github.com/tc39/proposal-async-iteration)