v7.0.0-beta.56

In Babel 6, we had `@babel/runtime` which _always_ uses `core-js` in its helpers, meaning that anyone who wants to use our helpers in a centralized modular way had to also use core-js, which isn't always ideal.

Early in the Babel 7 alpha, we added a `useBuiltins: true` option that would use separate copies of the helpers that would skip loading `core-js`, but this _still_ requires users to have an indirect npm dependency on `core-js`.

This PR splits our setup into two separate runtimes:

* ```
  'plugins': [
    ['transform-runtime'],
  ]
  ```
  with `npm install --save @babel/runtime` that just includes our helpers, and relies on users to globally polyfill any APIs they need.
* ```
  'plugins': [
    ['transform-runtime', { corejs: 2 }],
  ]
  ```
  with `npm install --save @babel/runtime-corejs2` that includes everything `@babel/runtime` does, but also includes a passthrough API for `corejs@2.x` and rewrites all of the helper modules to reference `core-js`.

.eslintignore

@@ -4,8 +4,9 @@
 package.json
 lerna.json
 packages/babel-runtime
-!packages/babel-runtime/scripts
-!packages/babel-runtime/core-js.js
+!packages/babel-plugin-transform-runtime/scripts
+!packages/babel-runtime-corejs2/core-js.js
+packages/babel-runtime-corejs2
 packages/*/node_modules
 packages/*/lib
 packages/*/dist

.gitignore

@@ -12,24 +12,27 @@ coverage
 dist
 /.package.json
 package-lock.json
-/packages/babel-runtime/core-js/**/*.js
-!/packages/babel-runtime/core-js/map.js
+
 /packages/babel-runtime/helpers/*.js
 !/packages/babel-runtime/helpers/toArray.js
 !/packages/babel-runtime/helpers/iterableToArray.js
 !/packages/babel-runtime/helpers/temporalRef.js
-/packages/babel-runtime/helpers/builtin/*.js
-!/packages/babel-runtime/helpers/builtin/toArray.js
-!/packages/babel-runtime/helpers/builtin/iterableToArray.js
-!/packages/babel-runtime/helpers/builtin/temporalRef.js
-/packages/babel-runtime/helpers/builtin/es6/*.js
-!/packages/babel-runtime/helpers/builtin/es6/toArray.js
-!/packages/babel-runtime/helpers/builtin/es6/iterableToArray.js
-!/packages/babel-runtime/helpers/builtin/es6/temporalRef.js
-/packages/babel-runtime/helpers/es6/*.js
-!/packages/babel-runtime/helpers/es6/toArray.js
-!/packages/babel-runtime/helpers/es6/iterableToArray.js
-!/packages/babel-runtime/helpers/es6/temporalRef.js
+/packages/babel-runtime/helpers/esm/*.js
+!/packages/babel-runtime/helpers/esm/toArray.js
+!/packages/babel-runtime/helpers/esm/iterableToArray.js
+!/packages/babel-runtime/helpers/esm/temporalRef.js
+
+/packages/babel-runtime-corejs2/helpers/*.js
+!/packages/babel-runtime-corejs2/helpers/toArray.js
+!/packages/babel-runtime-corejs2/helpers/iterableToArray.js
+!/packages/babel-runtime-corejs2/helpers/temporalRef.js
+/packages/babel-runtime-corejs2/helpers/esm/*.js
+!/packages/babel-runtime-corejs2/helpers/esm/toArray.js
+!/packages/babel-runtime-corejs2/helpers/esm/iterableToArray.js
+!/packages/babel-runtime-corejs2/helpers/esm/temporalRef.js
+/packages/babel-runtime-corejs2/core-js/**/*.js
+!/packages/babel-runtime-corejs2/core-js/map.js
+
 /packages/babel-register/test/.babel
 /packages/babel-cli/test/tmp
 /packages/babel-node/test/tmp

CODE_OF_CONDUCT.md

@@ -3,7 +3,7 @@
 ## Our Pledge
 
 In the interest of fostering an open and welcoming environment, we as
-contributors and maintainers pledge to making participation in our project and
+contributors and maintainers pledge to make participation in our project and
 our community a harassment-free experience for everyone, regardless of age, body
 size, disability, ethnicity, gender identity and expression, level of experience,
 nationality, personal appearance, race, religion, or sexual identity and

CONTRIBUTING.md

@@ -186,7 +186,7 @@ For example, in [`@babel/plugin-transform-exponentiation-operator/test`](https:/
    - If you need to expect an error, you can ignore creating the `output.js` file and pass a new `throws` key to the `options.json` that contains the error string that is created.
    - The second and preferred type is a test that actually evaluates the produced code and asserts that certain properties are true or false. We do this by creating an [`exec.js`](https://github.com/babel/babel/blob/master/packages/babel-plugin-transform-exponentiation-operator/test/fixtures/exponentian-operator/comprehensive/exec.js) file.
 
-In a fixture test, you simply write out the code you want transformed in `input.js`.
+In a fixture test, you simply write out the code you want to transform in `input.js`.
 
 ```js
 // input.js

Makefile

@@ -1,5 +1,5 @@
 MAKEFLAGS = -j1
-FLOW_COMMIT = 395e045c18d537fcbbc552a96ef2cdcd70b4ab52
+FLOW_COMMIT = bea8b83f50f597454941d2a7ecef6e93a881e576
 TEST262_COMMIT = f90a52b39609a620c0854e0bd0b3a906c930fd17
 
 # Fix color output until TravisCI fixes https://github.com/travis-ci/travis-ci/issues/7967
@@ -31,7 +31,7 @@ build-preset-env-standalone:
 build-dist: build
 	cd packages/babel-polyfill; \
 	scripts/build-dist.sh
-	cd packages/babel-runtime; \
+	cd packages/babel-plugin-transform-runtime; \
 	node scripts/build-dist.js
 
 watch: clean clean-lib
@@ -108,7 +108,8 @@ publish:
 	git pull --rebase
 	make clean-lib
 	rm -rf packages/babel-runtime/helpers
-	rm -rf packages/babel-runtime/core-js
+	rm -rf packages/babel-runtime-corejs2/helpers
+	rm -rf packages/babel-runtime-corejs2/core-js
 	BABEL_ENV=production make build-dist
 	make test
 	# not using lerna independent mode atm, so only update packages that have changed since we use ^
@@ -120,7 +121,7 @@ bootstrap: clean-all
 	yarn --ignore-engines
 	./node_modules/.bin/lerna bootstrap -- --ignore-engines
 	make build
-	cd packages/babel-runtime; \
+	cd packages/babel-plugin-transform-runtime; \
 	node scripts/build-dist.js
 
 clean-lib:

babel.config.js

@@ -13,13 +13,18 @@ module.exports = function(api) {
 
   let convertESM = true;
   let ignoreLib = true;
+  let includeRuntime = false;
 
   switch (env) {
     // Configs used during bundling builds.
     case "babel-parser":
+      convertESM = false;
+      ignoreLib = false;
+      break;
     case "standalone":
       convertESM = false;
       ignoreLib = false;
+      includeRuntime = true;
       break;
     case "production":
       // Config during builds before publish.
@@ -41,6 +46,10 @@ module.exports = function(api) {
   }
 
   const config = {
+    // Our dependencies are all standard CommonJS, along with all sorts of
+    // other random files in Babel's codebase, so we use script as the default,
+    // and then mark actual modules as modules farther down.
+    sourceType: "script",
     comments: false,
     ignore: [
       // These may not be strictly necessary with the newly-limited scope of
@@ -84,7 +93,29 @@ module.exports = function(api) {
           convertESM ? "@babel/transform-modules-commonjs" : null,
         ].filter(Boolean),
       },
-    ],
+      {
+        // The vast majority of our src files are modules, but we use
+        // unambiguous to keep things simple until we get around to renaming
+        // the modules to be more easily distinguished from CommonJS
+        test: [
+          "packages/*/src",
+          "packages/*/test",
+          "codemods/*/src",
+          "codemods/*/test",
+        ],
+        sourceType: "unambiguous",
+      },
+      {
+        // The runtime transform shouldn't process its own runtime or core-js.
+        exclude: [
+          "packages/babel-runtime",
+          /[\\/]node_modules[\\/](?:@babel\/runtime|babel-runtime|core-js)[\\/]/,
+        ],
+        plugins: [includeRuntime ? "@babel/transform-runtime" : null].filter(
+          Boolean
+        ),
+      },
+    ].filter(Boolean),
   };
 
   // we need to do this as long as we do not test everything from source

codemods/babel-plugin-codemod-object-assign-to-object-spread/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-codemod-object-assign-to-object-spread",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Transforms Object.assign into object spread syntax",
   "repository": "https://github.com/babel/babel/tree/master/codemods/babel-plugin-codemod-object-assign-to-object-spread",
   "license": "MIT",
@@ -10,14 +10,14 @@
     "@babel/plugin"
   ],
   "dependencies": {
-    "@babel/plugin-syntax-object-rest-spread": "7.0.0-beta.55"
+    "@babel/plugin-syntax-object-rest-spread": "7.0.0-beta.56"
   },
   "peerDependencies": {
     "@babel/core": ">=7.0.0-beta.50 <7.0.0-rc.0"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.55",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.55"
+    "@babel/core": "7.0.0-beta.56",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.56"
   },
   "publishConfig": {
     "access": "public"

codemods/babel-plugin-codemod-optional-catch-binding/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-codemod-optional-catch-binding",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Remove unused catch bindings",
   "repository": "https://github.com/babel/babel/tree/master/codemods/babel-plugin-codemod-remove-unused-catch-binding",
   "license": "MIT",
@@ -10,13 +10,13 @@
     "@babel/plugin"
   ],
   "dependencies": {
-    "@babel/plugin-syntax-optional-catch-binding": "7.0.0-beta.55"
+    "@babel/plugin-syntax-optional-catch-binding": "7.0.0-beta.56"
   },
   "peerDependencies": {
     "@babel/core": ">=7.0.0-beta.50 <7.0.0-rc.0"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.55",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.55"
+    "@babel/core": "7.0.0-beta.56",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.56"
   }
 }

lerna.json

@@ -1,6 +1,6 @@
 {
   "lerna": "2.11.0",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "changelog": {
     "repo": "babel/babel",
     "cacheDir": ".changelog",

lib/third-party-libs.js.flow

@@ -32,6 +32,20 @@ declare module "lodash/merge" {
   declare export default <T: Object>(T, Object) => T;
 }
 
+declare module "semver" {
+  declare module.exports: {
+    valid(v: string): boolean;
+    gt(v1: string, v2: string): boolean;
+    lt(v1: string, v2: string): boolean;
+    major(v: string): number;
+    minor(v: string): number;
+    patch(v: string): number;
+    satisfies(v1: string, r1: string): boolean;
+
+    intersects(r1: string, r2: string): boolean;
+  }
+}
+
 declare module "source-map" {
   declare export type SourceMap = {
     version: 3,

package.json

@@ -12,6 +12,7 @@
   "devDependencies": {
     "@babel/cli": "7.0.0-beta.52",
     "@babel/core": "7.0.0-beta.52",
+    "@babel/plugin-transform-runtime": "7.0.0-beta.52",
     "@babel/plugin-proposal-class-properties": "7.0.0-beta.52",
     "@babel/plugin-proposal-export-namespace-from": "7.0.0-beta.52",
     "@babel/plugin-proposal-numeric-separator": "7.0.0-beta.52",
@@ -19,6 +20,7 @@
     "@babel/preset-env": "7.0.0-beta.52",
     "@babel/preset-flow": "7.0.0-beta.52",
     "@babel/register": "7.0.0-beta.52",
+    "@babel/runtime": "7.0.0-beta.52",
     "babel-core": "^7.0.0-0",
     "babel-eslint": "^8.2.6",
     "babel-jest": "^23.4.0",

packages/babel-cli/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/cli",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Babel command line.",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -33,8 +33,8 @@
     "@babel/core": ">=7.0.0-beta.50 <7.0.0-rc.0"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.55",
-    "@babel/helper-fixtures": "7.0.0-beta.55"
+    "@babel/core": "7.0.0-beta.56",
+    "@babel/helper-fixtures": "7.0.0-beta.56"
   },
   "bin": {
     "babel": "./bin/babel.js",

packages/babel-cli/src/babel/dir.js

@@ -89,7 +89,7 @@ export default async function({ cliOptions, babelOptions }) {
 
     const stat = fs.statSync(filenameOrDir);
 
-    if (stat.isDirectory(filenameOrDir)) {
+    if (stat.isDirectory()) {
       const dirname = filenameOrDir;
 
       let count = 0;

packages/babel-cli/src/babel/util.js

@@ -15,11 +15,15 @@ export function readdir(
   includeDotfiles: boolean,
   filter: ReaddirFilter,
 ) {
-  return readdirRecursive(
-    dirname,
-    filename =>
-      (includeDotfiles || filename[0] !== ".") && (!filter || filter(filename)),
-  );
+  return readdirRecursive(dirname, (filename, _index, currentDirectory) => {
+    const stat = fs.statSync(path.join(currentDirectory, filename));
+
+    if (stat.isDirectory()) return true;
+
+    return (
+      (includeDotfiles || filename[0] !== ".") && (!filter || filter(filename))
+    );
+  });
 }
 
 export function readdirForCompilable(

packages/babel-cli/test/fixtures/babel/dir --out-file/in-files/src/bar/bar.js

@@ -0,0 +1 @@
+ (() => 42)

packages/babel-cli/test/fixtures/babel/dir --out-file/in-files/src/foo.js

@@ -0,0 +1 @@
+arr.map(x => x * MULTIPLIER);

packages/babel-cli/test/fixtures/babel/dir --out-file/options.json

@@ -0,0 +1,3 @@
+{
+  "args": ["src", "--out-file", "test.js"]
+}

packages/babel-cli/test/fixtures/babel/dir --out-file/out-files/test.js

@@ -0,0 +1,10 @@
+"use strict";
+
+(function () {
+  return 42;
+});
+"use strict";
+
+arr.map(function (x) {
+  return x * MULTIPLIER;
+});

packages/babel-code-frame/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/code-frame",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Generate errors that contain a code frame that point to source locations.",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -8,7 +8,7 @@
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-code-frame",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/highlight": "7.0.0-beta.55"
+    "@babel/highlight": "7.0.0-beta.56"
   },
   "devDependencies": {
     "chalk": "^2.0.0",

packages/babel-core/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/core",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Babel compiler core.",
   "main": "lib/index.js",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
@@ -30,13 +30,13 @@
     "./lib/transform-file.js": "./lib/transform-file-browser.js"
   },
   "dependencies": {
-    "@babel/code-frame": "7.0.0-beta.55",
-    "@babel/generator": "7.0.0-beta.55",
-    "@babel/helpers": "7.0.0-beta.55",
-    "@babel/parser": "7.0.0-beta.55",
-    "@babel/template": "7.0.0-beta.55",
-    "@babel/traverse": "7.0.0-beta.55",
-    "@babel/types": "7.0.0-beta.55",
+    "@babel/code-frame": "7.0.0-beta.56",
+    "@babel/generator": "7.0.0-beta.56",
+    "@babel/helpers": "7.0.0-beta.56",
+    "@babel/parser": "7.0.0-beta.56",
+    "@babel/template": "7.0.0-beta.56",
+    "@babel/traverse": "7.0.0-beta.56",
+    "@babel/types": "7.0.0-beta.56",
     "convert-source-map": "^1.1.0",
     "debug": "^3.1.0",
     "json5": "^0.5.0",
@@ -46,7 +46,7 @@
     "source-map": "^0.5.0"
   },
   "devDependencies": {
-    "@babel/helper-transform-fixture-test-runner": "7.0.0-beta.55",
-    "@babel/register": "7.0.0-beta.55"
+    "@babel/helper-transform-fixture-test-runner": "7.0.0-beta.56",
+    "@babel/register": "7.0.0-beta.56"
   }
 }

packages/babel-core/src/transformation/file/file.js

@@ -5,6 +5,7 @@ import { NodePath, Hub, Scope } from "@babel/traverse";
 import { codeFrameColumns } from "@babel/code-frame";
 import traverse from "@babel/traverse";
 import * as t from "@babel/types";
+import semver from "semver";
 
 import type { NormalizedFile } from "../normalize-file";
 
@@ -64,6 +65,16 @@ export default class File {
   }
 
   set(key: mixed, val: mixed) {
+    if (key === "helpersNamespace") {
+      throw new Error(
+        "Babel 7.0.0-beta.56 has dropped support for the 'helpersNamespace' utility." +
+          "If you are using @babel/plugin-external-helpers you will need to use a newer " +
+          "version than the one you currently have installed. " +
+          "If you have your own implementation, you'll want to explore using 'helperGenerator' " +
+          "alongside 'file.availableHelper()'.",
+      );
+    }
+
     this._map.set(key, val);
   }
 
@@ -136,17 +147,38 @@ export default class File {
     );
   }
 
+  /**
+   * Check if a given helper is available in @babel/core's helper list.
+   *
+   * This _also_ allows you to pass a Babel version specifically. If the
+   * helper exists, but was not available for the full given range, it will be
+   * considered unavailable.
+   */
+  availableHelper(name: string, versionRange: ?string) {
+    let minVersion;
+    try {
+      minVersion = helpers.minVersion(name);
+    } catch (err) {
+      if (err.code !== "BABEL_HELPER_UNKNOWN") throw err;
+
+      return false;
+    }
+
+    return (
+      typeof versionRange !== "string" ||
+      (!semver.intersects(`<${minVersion}`, versionRange) &&
+        !semver.intersects(`>=8.0.0`, versionRange))
+    );
+  }
+
   addHelper(name: string): Object {
     const declar = this.declarations[name];
     if (declar) return t.cloneNode(declar);
 
     const generator = this.get("helperGenerator");
-    const runtime = this.get("helpersNamespace");
     if (generator) {
       const res = generator(name);
       if (res) return res;
-    } else if (runtime) {
-      return t.memberExpression(t.cloneNode(runtime), t.identifier(name));
     }
 
     const uid = (this.declarations[name] = this.scope.generateUidIdentifier(

packages/babel-core/src/transformation/plugin-pass.js

@@ -31,6 +31,10 @@ export default class PluginPass {
     return this._map.get(key);
   }
 
+  availableHelper(name: string, versionRange: ?string) {
+    return this.file.availableHelper(name, versionRange);
+  }
+
   addHelper(name: string) {
     return this.file.addHelper(name);
   }

packages/babel-generator/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/generator",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Turns an AST into code.",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -11,14 +11,14 @@
     "lib"
   ],
   "dependencies": {
-    "@babel/types": "7.0.0-beta.55",
+    "@babel/types": "7.0.0-beta.56",
     "jsesc": "^2.5.1",
     "lodash": "^4.17.10",
     "source-map": "^0.5.0",
     "trim-right": "^1.0.1"
   },
   "devDependencies": {
-    "@babel/helper-fixtures": "7.0.0-beta.55",
-    "@babel/parser": "7.0.0-beta.55"
+    "@babel/helper-fixtures": "7.0.0-beta.56",
+    "@babel/parser": "7.0.0-beta.56"
   }
 }

packages/babel-generator/src/generators/classes.js

@@ -124,6 +124,7 @@ export function ClassPrivateProperty(node: Object) {
     this.space();
   }
   this.print(node.key, node);
+  this.print(node.typeAnnotation, node);
   if (node.value) {
     this.space();
     this.token("=");

packages/babel-generator/test/fixtures/flow/type-annotations/input.js

@@ -72,6 +72,10 @@ class Foo {
   static prop1: string;
   prop2: number;
 }
+class Foo {
+  #prop1: string;
+  prop2: number;
+}
 var x: number | string = 4;
 class Array { concat(items:number | string) {}; }
 var x: () => number | () => string = fn;

packages/babel-generator/test/fixtures/flow/type-annotations/options.json

@@ -0,0 +1 @@
+{ "plugins": ["classPrivateProperties", "flow"] }

packages/babel-generator/test/fixtures/flow/type-annotations/output.js

@@ -168,6 +168,11 @@ class Foo {
   prop2: number;
 }
 
+class Foo {
+  #prop1: string;
+  prop2: number;
+}
+
 var x: number | string = 4;
 
 class Array {

packages/babel-helper-annotate-as-pure/package.json

@@ -1,11 +1,11 @@
 {
   "name": "@babel/helper-annotate-as-pure",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Helper function to annotate paths and nodes with #__PURE__ comment",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-annotate-as-pure",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/types": "7.0.0-beta.55"
+    "@babel/types": "7.0.0-beta.56"
   }
 }

packages/babel-helper-bindify-decorators/package.json

@@ -1,12 +1,12 @@
 {
   "name": "@babel/helper-bindify-decorators",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Helper function to bindify decorators",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-bindify-decorators",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/traverse": "7.0.0-beta.55",
-    "@babel/types": "7.0.0-beta.55"
+    "@babel/traverse": "7.0.0-beta.56",
+    "@babel/types": "7.0.0-beta.56"
   }
 }

packages/babel-helper-builder-binary-assignment-operator-visitor/package.json

@@ -1,12 +1,12 @@
 {
   "name": "@babel/helper-builder-binary-assignment-operator-visitor",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Helper function to build binary assignment operator visitors",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-builder-binary-assignment-operator-visitor",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/helper-explode-assignable-expression": "7.0.0-beta.55",
-    "@babel/types": "7.0.0-beta.55"
+    "@babel/helper-explode-assignable-expression": "7.0.0-beta.56",
+    "@babel/types": "7.0.0-beta.56"
   }
 }

packages/babel-helper-builder-react-jsx/package.json

@@ -1,12 +1,12 @@
 {
   "name": "@babel/helper-builder-react-jsx",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Helper function to build react jsx",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-builder-react-jsx",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/types": "7.0.0-beta.55",
+    "@babel/types": "7.0.0-beta.56",
     "esutils": "^2.0.0"
   }
 }

packages/babel-helper-call-delegate/package.json

@@ -1,13 +1,13 @@
 {
   "name": "@babel/helper-call-delegate",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Helper function to call delegate",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-call-delegate",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/helper-hoist-variables": "7.0.0-beta.55",
-    "@babel/traverse": "7.0.0-beta.55",
-    "@babel/types": "7.0.0-beta.55"
+    "@babel/helper-hoist-variables": "7.0.0-beta.56",
+    "@babel/traverse": "7.0.0-beta.56",
+    "@babel/types": "7.0.0-beta.56"
   }
 }

packages/babel-helper-define-map/package.json

@@ -1,13 +1,13 @@
 {
   "name": "@babel/helper-define-map",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Helper function to define a map",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-define-map",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/helper-function-name": "7.0.0-beta.55",
-    "@babel/types": "7.0.0-beta.55",
+    "@babel/helper-function-name": "7.0.0-beta.56",
+    "@babel/types": "7.0.0-beta.56",
     "lodash": "^4.17.10"
   }
 }

packages/babel-helper-explode-assignable-expression/package.json

@@ -1,12 +1,12 @@
 {
   "name": "@babel/helper-explode-assignable-expression",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Helper function to explode an assignable expression",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-explode-assignable-expression",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/traverse": "7.0.0-beta.55",
-    "@babel/types": "7.0.0-beta.55"
+    "@babel/traverse": "7.0.0-beta.56",
+    "@babel/types": "7.0.0-beta.56"
   }
 }

packages/babel-helper-explode-class/package.json

@@ -1,13 +1,13 @@
 {
   "name": "@babel/helper-explode-class",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Helper function to explode class",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-explode-class",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/helper-bindify-decorators": "7.0.0-beta.55",
-    "@babel/traverse": "7.0.0-beta.55",
-    "@babel/types": "7.0.0-beta.55"
+    "@babel/helper-bindify-decorators": "7.0.0-beta.56",
+    "@babel/traverse": "7.0.0-beta.56",
+    "@babel/types": "7.0.0-beta.56"
   }
 }

packages/babel-helper-fixtures/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/helper-fixtures",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Helper function to support fixtures",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "license": "MIT",

packages/babel-helper-function-name/package.json

@@ -1,13 +1,13 @@
 {
   "name": "@babel/helper-function-name",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Helper function to change the property 'name' of every function",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-function-name",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/helper-get-function-arity": "7.0.0-beta.55",
-    "@babel/template": "7.0.0-beta.55",
-    "@babel/types": "7.0.0-beta.55"
+    "@babel/helper-get-function-arity": "7.0.0-beta.56",
+    "@babel/template": "7.0.0-beta.56",
+    "@babel/types": "7.0.0-beta.56"
   }
 }

packages/babel-helper-get-function-arity/package.json

@@ -1,11 +1,11 @@
 {
   "name": "@babel/helper-get-function-arity",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Helper function to get function arity",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-get-function-arity",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/types": "7.0.0-beta.55"
+    "@babel/types": "7.0.0-beta.56"
   }
 }

packages/babel-helper-hoist-variables/package.json

@@ -1,11 +1,11 @@
 {
   "name": "@babel/helper-hoist-variables",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Helper function to hoist variables",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-hoist-variables",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/types": "7.0.0-beta.55"
+    "@babel/types": "7.0.0-beta.56"
   }
 }

packages/babel-helper-member-expression-to-functions/package.json

@@ -1,12 +1,12 @@
 {
   "name": "@babel/helper-member-expression-to-functions",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Helper function to replace certain member expressions with function calls",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-member-expression-to-functions",
   "license": "MIT",
   "main": "lib/index.js",
   "author": "Justin Ridgewell <justin@ridgewell.name>",
   "dependencies": {
-    "@babel/types": "7.0.0-beta.55"
+    "@babel/types": "7.0.0-beta.56"
   }
 }

packages/babel-helper-module-imports/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/helper-module-imports",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Babel helper functions for inserting module loads",
   "author": "Logan Smyth <loganfsmyth@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -8,10 +8,10 @@
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-module-imports",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/types": "7.0.0-beta.55",
+    "@babel/types": "7.0.0-beta.56",
     "lodash": "^4.17.10"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.55"
+    "@babel/core": "7.0.0-beta.56"
   }
 }

packages/babel-helper-module-imports/test/index.js

@@ -18,7 +18,12 @@ function test(sourceType, opts, initializer, expectedCode) {
       function({ types: t }) {
         return {
           pre(file) {
-            file.set("helpersNamespace", t.identifier("babelHelpers"));
+            file.set("helperGenerator", name =>
+              t.memberExpression(
+                t.identifier("babelHelpers"),
+                t.identifier(name),
+              ),
+            );
           },
           visitor: {
             Program(path) {

packages/babel-helper-module-transforms/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/helper-module-transforms",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Babel helper functions for implementing ES6 module transformations",
   "author": "Logan Smyth <loganfsmyth@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -8,11 +8,11 @@
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-module-transforms",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/helper-module-imports": "7.0.0-beta.55",
-    "@babel/helper-simple-access": "7.0.0-beta.55",
-    "@babel/helper-split-export-declaration": "7.0.0-beta.55",
-    "@babel/template": "7.0.0-beta.55",
-    "@babel/types": "7.0.0-beta.55",
+    "@babel/helper-module-imports": "7.0.0-beta.56",
+    "@babel/helper-simple-access": "7.0.0-beta.56",
+    "@babel/helper-split-export-declaration": "7.0.0-beta.56",
+    "@babel/template": "7.0.0-beta.56",
+    "@babel/types": "7.0.0-beta.56",
     "lodash": "^4.17.10"
   }
 }

packages/babel-helper-optimise-call-expression/package.json

@@ -1,11 +1,11 @@
 {
   "name": "@babel/helper-optimise-call-expression",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Helper function to optimise call expression",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-optimise-call-expression",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/types": "7.0.0-beta.55"
+    "@babel/types": "7.0.0-beta.56"
   }
 }

packages/babel-helper-plugin-test-runner/package.json

@@ -1,11 +1,11 @@
 {
   "name": "@babel/helper-plugin-test-runner",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Helper function to support test runner",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-plugin-test-runner",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/helper-transform-fixture-test-runner": "7.0.0-beta.55"
+    "@babel/helper-transform-fixture-test-runner": "7.0.0-beta.56"
   }
 }

packages/babel-helper-plugin-utils/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/helper-plugin-utils",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "General utilities for plugins to use",
   "author": "Logan Smyth <loganfsmyth@gmail.com>",
   "homepage": "https://babeljs.io/",

packages/babel-helper-regex/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/helper-regex",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Helper function to check for literal RegEx",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-regex",
   "license": "MIT",

packages/babel-helper-remap-async-to-generator/package.json

@@ -1,15 +1,15 @@
 {
   "name": "@babel/helper-remap-async-to-generator",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Helper function to remap async functions to generators",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-remap-async-to-generator",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/helper-annotate-as-pure": "7.0.0-beta.55",
-    "@babel/helper-wrap-function": "7.0.0-beta.55",
-    "@babel/template": "7.0.0-beta.55",
-    "@babel/traverse": "7.0.0-beta.55",
-    "@babel/types": "7.0.0-beta.55"
+    "@babel/helper-annotate-as-pure": "7.0.0-beta.56",
+    "@babel/helper-wrap-function": "7.0.0-beta.56",
+    "@babel/template": "7.0.0-beta.56",
+    "@babel/traverse": "7.0.0-beta.56",
+    "@babel/types": "7.0.0-beta.56"
   }
 }

packages/babel-helper-replace-supers/package.json

@@ -1,14 +1,14 @@
 {
   "name": "@babel/helper-replace-supers",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Helper function to replace supers",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-replace-supers",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/helper-member-expression-to-functions": "7.0.0-beta.55",
-    "@babel/helper-optimise-call-expression": "7.0.0-beta.55",
-    "@babel/traverse": "7.0.0-beta.55",
-    "@babel/types": "7.0.0-beta.55"
+    "@babel/helper-member-expression-to-functions": "7.0.0-beta.56",
+    "@babel/helper-optimise-call-expression": "7.0.0-beta.56",
+    "@babel/traverse": "7.0.0-beta.56",
+    "@babel/types": "7.0.0-beta.56"
   }
 }

packages/babel-helper-simple-access/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/helper-simple-access",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Babel helper for ensuring that access to a given value is performed through simple accesses",
   "author": "Logan Smyth <loganfsmyth@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -8,8 +8,8 @@
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-simple-access",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/template": "7.0.0-beta.55",
-    "@babel/types": "7.0.0-beta.55",
+    "@babel/template": "7.0.0-beta.56",
+    "@babel/types": "7.0.0-beta.56",
     "lodash": "^4.17.10"
   }
 }

packages/babel-helper-split-export-declaration/package.json

@@ -1,11 +1,11 @@
 {
   "name": "@babel/helper-split-export-declaration",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-split-export-declaration",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/types": "7.0.0-beta.55"
+    "@babel/types": "7.0.0-beta.56"
   }
 }

packages/babel-helper-transform-fixture-test-runner/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/helper-transform-fixture-test-runner",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Transform test runner for @babel/helper-fixtures module",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -8,10 +8,10 @@
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-transform-fixture-test-runner",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/code-frame": "7.0.0-beta.55",
-    "@babel/core": "7.0.0-beta.55",
-    "@babel/helper-fixtures": "7.0.0-beta.55",
-    "@babel/polyfill": "7.0.0-beta.55",
+    "@babel/code-frame": "7.0.0-beta.56",
+    "@babel/core": "7.0.0-beta.56",
+    "@babel/helper-fixtures": "7.0.0-beta.56",
+    "@babel/polyfill": "7.0.0-beta.56",
     "jest": "^22.4.2",
     "jest-diff": "^22.4.0",
     "lodash": "^4.17.10",

packages/babel-helper-wrap-function/package.json

@@ -1,14 +1,14 @@
 {
   "name": "@babel/helper-wrap-function",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Helper to wrap functions inside a function call.",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-wrap-function",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/helper-function-name": "7.0.0-beta.55",
-    "@babel/template": "7.0.0-beta.55",
-    "@babel/traverse": "7.0.0-beta.55",
-    "@babel/types": "7.0.0-beta.55"
+    "@babel/helper-function-name": "7.0.0-beta.56",
+    "@babel/template": "7.0.0-beta.56",
+    "@babel/traverse": "7.0.0-beta.56",
+    "@babel/types": "7.0.0-beta.56"
   }
 }

packages/babel-helpers/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/helpers",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Collection of helper functions used by Babel transforms.",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -8,11 +8,11 @@
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helpers",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/template": "7.0.0-beta.55",
-    "@babel/traverse": "7.0.0-beta.55",
-    "@babel/types": "7.0.0-beta.55"
+    "@babel/template": "7.0.0-beta.56",
+    "@babel/traverse": "7.0.0-beta.56",
+    "@babel/types": "7.0.0-beta.56"
   },
   "devDependencies": {
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.55"
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.56"
   }
 }

packages/babel-helpers/src/helpers.js

@@ -1,9 +1,16 @@
+// @flow
+
 import template from "@babel/template";
 
-const helpers = {};
+const helpers = Object.create(null);
 export default helpers;
 
-helpers.typeof = () => template.program.ast`
+const helper = (minVersion: string) => tpl => ({
+  minVersion,
+  ast: () => template.program.ast(tpl),
+});
+
+helpers.typeof = helper("7.0.0-beta.0")`
   export default function _typeof(obj) {
     if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") {
       _typeof = function (obj) { return typeof obj; };
@@ -19,7 +26,7 @@ helpers.typeof = () => template.program.ast`
   }
 `;
 
-helpers.jsx = () => template.program.ast`
+helpers.jsx = helper("7.0.0-beta.0")`
   var REACT_ELEMENT_TYPE;
 
   export default function _createRawReactElement(type, props, key, children) {
@@ -70,7 +77,7 @@ helpers.jsx = () => template.program.ast`
   }
 `;
 
-helpers.asyncIterator = () => template.program.ast`
+helpers.asyncIterator = helper("7.0.0-beta.0")`
   export default function _asyncIterator(iterable) {
     var method
     if (typeof Symbol === "function") {
@@ -87,13 +94,13 @@ helpers.asyncIterator = () => template.program.ast`
   }
 `;
 
-helpers.AwaitValue = () => template.program.ast`
+helpers.AwaitValue = helper("7.0.0-beta.0")`
   export default function _AwaitValue(value) {
     this.wrapped = value;
   }
 `;
 
-helpers.AsyncGenerator = () => template.program.ast`
+helpers.AsyncGenerator = helper("7.0.0-beta.0")`
   import AwaitValue from "AwaitValue";
 
   export default function AsyncGenerator(gen) {
@@ -177,7 +184,7 @@ helpers.AsyncGenerator = () => template.program.ast`
   AsyncGenerator.prototype.return = function (arg) { return this._invoke("return", arg); };
 `;
 
-helpers.wrapAsyncGenerator = () => template.program.ast`
+helpers.wrapAsyncGenerator = helper("7.0.0-beta.0")`
   import AsyncGenerator from "AsyncGenerator";
 
   export default function _wrapAsyncGenerator(fn) {
@@ -187,7 +194,7 @@ helpers.wrapAsyncGenerator = () => template.program.ast`
   }
 `;
 
-helpers.awaitAsyncGenerator = () => template.program.ast`
+helpers.awaitAsyncGenerator = helper("7.0.0-beta.0")`
   import AwaitValue from "AwaitValue";
 
   export default function _awaitAsyncGenerator(value) {
@@ -195,7 +202,7 @@ helpers.awaitAsyncGenerator = () => template.program.ast`
   }
 `;
 
-helpers.asyncGeneratorDelegate = () => template.program.ast`
+helpers.asyncGeneratorDelegate = helper("7.0.0-beta.0")`
   export default function _asyncGeneratorDelegate(inner, awaitWrap) {
     var iter = {}, waiting = false;
 
@@ -237,7 +244,7 @@ helpers.asyncGeneratorDelegate = () => template.program.ast`
   }
 `;
 
-helpers.asyncToGenerator = () => template.program.ast`
+helpers.asyncToGenerator = helper("7.0.0-beta.0")`
   function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) {
     try {
       var info = gen[key](arg);
@@ -272,7 +279,7 @@ helpers.asyncToGenerator = () => template.program.ast`
   }
 `;
 
-helpers.classCallCheck = () => template.program.ast`
+helpers.classCallCheck = helper("7.0.0-beta.0")`
   export default function _classCallCheck(instance, Constructor) {
     if (!(instance instanceof Constructor)) {
       throw new TypeError("Cannot call a class as a function");
@@ -280,7 +287,7 @@ helpers.classCallCheck = () => template.program.ast`
   }
 `;
 
-helpers.createClass = () => template.program.ast`
+helpers.createClass = helper("7.0.0-beta.0")`
   function _defineProperties(target, props) {
     for (var i = 0; i < props.length; i ++) {
       var descriptor = props[i];
@@ -298,7 +305,7 @@ helpers.createClass = () => template.program.ast`
   }
 `;
 
-helpers.defineEnumerableProperties = () => template.program.ast`
+helpers.defineEnumerableProperties = helper("7.0.0-beta.0")`
   export default function _defineEnumerableProperties(obj, descs) {
     for (var key in descs) {
       var desc = descs[key];
@@ -324,7 +331,7 @@ helpers.defineEnumerableProperties = () => template.program.ast`
   }
 `;
 
-helpers.defaults = () => template.program.ast`
+helpers.defaults = helper("7.0.0-beta.0")`
   export default function _defaults(obj, defaults) {
     var keys = Object.getOwnPropertyNames(defaults);
     for (var i = 0; i < keys.length; i++) {
@@ -338,7 +345,7 @@ helpers.defaults = () => template.program.ast`
   }
 `;
 
-helpers.defineProperty = () => template.program.ast`
+helpers.defineProperty = helper("7.0.0-beta.0")`
   export default function _defineProperty(obj, key, value) {
     // Shortcircuit the slow defineProperty path when possible.
     // We are trying to avoid issues where setters defined on the
@@ -359,7 +366,7 @@ helpers.defineProperty = () => template.program.ast`
   }
 `;
 
-helpers.extends = () => template.program.ast`
+helpers.extends = helper("7.0.0-beta.0")`
   export default function _extends() {
     _extends = Object.assign || function (target) {
       for (var i = 1; i < arguments.length; i++) {
@@ -377,7 +384,7 @@ helpers.extends = () => template.program.ast`
   }
 `;
 
-helpers.objectSpread = () => template.program.ast`
+helpers.objectSpread = helper("7.0.0-beta.0")`
   import defineProperty from "defineProperty";
 
   export default function _objectSpread(target) {
@@ -397,7 +404,7 @@ helpers.objectSpread = () => template.program.ast`
   }
 `;
 
-helpers.inherits = () => template.program.ast`
+helpers.inherits = helper("7.0.0-beta.0")`
   import setPrototypeOf from "setPrototypeOf";
 
   export default function _inherits(subClass, superClass) {
@@ -415,7 +422,7 @@ helpers.inherits = () => template.program.ast`
   }
 `;
 
-helpers.inheritsLoose = () => template.program.ast`
+helpers.inheritsLoose = helper("7.0.0-beta.0")`
   export default function _inheritsLoose(subClass, superClass) {
     subClass.prototype = Object.create(superClass.prototype);
     subClass.prototype.constructor = subClass;
@@ -423,7 +430,7 @@ helpers.inheritsLoose = () => template.program.ast`
   }
 `;
 
-helpers.getPrototypeOf = () => template.program.ast`
+helpers.getPrototypeOf = helper("7.0.0-beta.0")`
   export default function _getPrototypeOf(o) {
     _getPrototypeOf = Object.setPrototypeOf
       ? Object.getPrototypeOf
@@ -434,7 +441,7 @@ helpers.getPrototypeOf = () => template.program.ast`
   }
 `;
 
-helpers.setPrototypeOf = () => template.program.ast`
+helpers.setPrototypeOf = helper("7.0.0-beta.0")`
   export default function _setPrototypeOf(o, p) {
     _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {
       o.__proto__ = p;
@@ -444,7 +451,7 @@ helpers.setPrototypeOf = () => template.program.ast`
   }
 `;
 
-helpers.construct = () => template.program.ast`
+helpers.construct = helper("7.0.0-beta.0")`
   import setPrototypeOf from "setPrototypeOf";
 
   function isNativeReflectConstruct() {
@@ -492,7 +499,7 @@ helpers.construct = () => template.program.ast`
 `;
 
 // Based on https://github.com/WebReflection/babel-plugin-transform-builtin-classes
-helpers.wrapNativeSuper = () => template.program.ast`
+helpers.wrapNativeSuper = helper("7.0.0-beta.0")`
   import getPrototypeOf from "getPrototypeOf";
   import setPrototypeOf from "setPrototypeOf";
   import construct from "construct";
@@ -528,7 +535,7 @@ helpers.wrapNativeSuper = () => template.program.ast`
   }
 `;
 
-helpers.instanceof = () => template.program.ast`
+helpers.instanceof = helper("7.0.0-beta.0")`
   export default function _instanceof(left, right) {
     if (right != null && typeof Symbol !== "undefined" && right[Symbol.hasInstance]) {
       return right[Symbol.hasInstance](left);
@@ -538,13 +545,13 @@ helpers.instanceof = () => template.program.ast`
   }
 `;
 
-helpers.interopRequireDefault = () => template.program.ast`
+helpers.interopRequireDefault = helper("7.0.0-beta.0")`
   export default function _interopRequireDefault(obj) {
     return obj && obj.__esModule ? obj : { default: obj };
   }
 `;
 
-helpers.interopRequireWildcard = () => template.program.ast`
+helpers.interopRequireWildcard = helper("7.0.0-beta.0")`
   export default function _interopRequireWildcard(obj) {
     if (obj && obj.__esModule) {
       return obj;
@@ -570,7 +577,7 @@ helpers.interopRequireWildcard = () => template.program.ast`
   }
 `;
 
-helpers.newArrowCheck = () => template.program.ast`
+helpers.newArrowCheck = helper("7.0.0-beta.0")`
   export default function _newArrowCheck(innerThis, boundThis) {
     if (innerThis !== boundThis) {
       throw new TypeError("Cannot instantiate an arrow function");
@@ -578,13 +585,13 @@ helpers.newArrowCheck = () => template.program.ast`
   }
 `;
 
-helpers.objectDestructuringEmpty = () => template.program.ast`
+helpers.objectDestructuringEmpty = helper("7.0.0-beta.0")`
   export default function _objectDestructuringEmpty(obj) {
     if (obj == null) throw new TypeError("Cannot destructure undefined");
   }
 `;
 
-helpers.objectWithoutPropertiesLoose = () => template.program.ast`
+helpers.objectWithoutPropertiesLoose = helper("7.0.0-beta.0")`
   export default function _objectWithoutPropertiesLoose(source, excluded) {
     if (source == null) return {};
 
@@ -602,7 +609,7 @@ helpers.objectWithoutPropertiesLoose = () => template.program.ast`
   }
 `;
 
-helpers.objectWithoutProperties = () => template.program.ast`
+helpers.objectWithoutProperties = helper("7.0.0-beta.0")`
   import objectWithoutPropertiesLoose from "objectWithoutPropertiesLoose";
 
   export default function _objectWithoutProperties(source, excluded) {
@@ -625,7 +632,7 @@ helpers.objectWithoutProperties = () => template.program.ast`
   }
 `;
 
-helpers.assertThisInitialized = () => template.program.ast`
+helpers.assertThisInitialized = helper("7.0.0-beta.0")`
   export default function _assertThisInitialized(self) {
     if (self === void 0) {
       throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
@@ -634,7 +641,7 @@ helpers.assertThisInitialized = () => template.program.ast`
   }
 `;
 
-helpers.possibleConstructorReturn = () => template.program.ast`
+helpers.possibleConstructorReturn = helper("7.0.0-beta.0")`
   import assertThisInitialized from "assertThisInitialized";
 
   export default function _possibleConstructorReturn(self, call) {
@@ -645,7 +652,7 @@ helpers.possibleConstructorReturn = () => template.program.ast`
   }
 `;
 
-helpers.superPropBase = () => template.program.ast`
+helpers.superPropBase = helper("7.0.0-beta.0")`
   import getPrototypeOf from "getPrototypeOf";
 
   export default function _superPropBase(object, property) {
@@ -658,7 +665,7 @@ helpers.superPropBase = () => template.program.ast`
   }
 `;
 
-helpers.get = () => template.program.ast`
+helpers.get = helper("7.0.0-beta.0")`
   import getPrototypeOf from "getPrototypeOf";
   import superPropBase from "superPropBase";
 
@@ -683,7 +690,7 @@ helpers.get = () => template.program.ast`
   }
 `;
 
-helpers.set = () => template.program.ast`
+helpers.set = helper("7.0.0-beta.0")`
   import getPrototypeOf from "getPrototypeOf";
   import superPropBase from "superPropBase";
   import defineProperty from "defineProperty";
@@ -741,7 +748,7 @@ helpers.set = () => template.program.ast`
   }
 `;
 
-helpers.taggedTemplateLiteral = () => template.program.ast`
+helpers.taggedTemplateLiteral = helper("7.0.0-beta.0")`
   export default function _taggedTemplateLiteral(strings, raw) {
     if (!raw) { raw = strings.slice(0); }
     return Object.freeze(Object.defineProperties(strings, {
@@ -750,7 +757,7 @@ helpers.taggedTemplateLiteral = () => template.program.ast`
   }
 `;
 
-helpers.taggedTemplateLiteralLoose = () => template.program.ast`
+helpers.taggedTemplateLiteralLoose = helper("7.0.0-beta.0")`
   export default function _taggedTemplateLiteralLoose(strings, raw) {
     if (!raw) { raw = strings.slice(0); }
     strings.raw = raw;
@@ -758,7 +765,7 @@ helpers.taggedTemplateLiteralLoose = () => template.program.ast`
   }
 `;
 
-helpers.temporalRef = () => template.program.ast`
+helpers.temporalRef = helper("7.0.0-beta.0")`
   import undef from "temporalUndefined";
 
   export default function _temporalRef(val, name) {
@@ -770,23 +777,23 @@ helpers.temporalRef = () => template.program.ast`
   }
 `;
 
-helpers.readOnlyError = () => template.program.ast`
+helpers.readOnlyError = helper("7.0.0-beta.0")`
   export default function _readOnlyError(name) {
     throw new Error("\\"" + name + "\\" is read-only");
   }
 `;
 
-helpers.classNameTDZError = () => template.program.ast`
+helpers.classNameTDZError = helper("7.0.0-beta.0")`
   export default function _classNameTDZError(name) {
     throw new Error("Class \\"" + name + "\\" cannot be referenced in computed property keys.");
   }
 `;
 
-helpers.temporalUndefined = () => template.program.ast`
+helpers.temporalUndefined = helper("7.0.0-beta.0")`
   export default {};
 `;
 
-helpers.slicedToArray = () => template.program.ast`
+helpers.slicedToArray = helper("7.0.0-beta.0")`
   import arrayWithHoles from "arrayWithHoles";
   import iterableToArrayLimit from "iterableToArrayLimit";
   import nonIterableRest from "nonIterableRest";
@@ -796,7 +803,7 @@ helpers.slicedToArray = () => template.program.ast`
   }
 `;
 
-helpers.slicedToArrayLoose = () => template.program.ast`
+helpers.slicedToArrayLoose = helper("7.0.0-beta.0")`
   import arrayWithHoles from "arrayWithHoles";
   import iterableToArrayLimitLoose from "iterableToArrayLimitLoose";
   import nonIterableRest from "nonIterableRest";
@@ -806,7 +813,7 @@ helpers.slicedToArrayLoose = () => template.program.ast`
   }
 `;
 
-helpers.toArray = () => template.program.ast`
+helpers.toArray = helper("7.0.0-beta.0")`
   import arrayWithHoles from "arrayWithHoles";
   import iterableToArray from "iterableToArray";
   import nonIterableRest from "nonIterableRest";
@@ -816,7 +823,7 @@ helpers.toArray = () => template.program.ast`
   }
 `;
 
-helpers.toConsumableArray = () => template.program.ast`
+helpers.toConsumableArray = helper("7.0.0-beta.0")`
   import arrayWithoutHoles from "arrayWithoutHoles";
   import iterableToArray from "iterableToArray";
   import nonIterableSpread from "nonIterableSpread";
@@ -826,7 +833,7 @@ helpers.toConsumableArray = () => template.program.ast`
   }
 `;
 
-helpers.arrayWithoutHoles = () => template.program.ast`
+helpers.arrayWithoutHoles = helper("7.0.0-beta.0")`
   export default function _arrayWithoutHoles(arr) {
     if (Array.isArray(arr)) {
       for (var i = 0, arr2 = new Array(arr.length); i < arr.length; i++) arr2[i] = arr[i];
@@ -835,13 +842,13 @@ helpers.arrayWithoutHoles = () => template.program.ast`
   }
 `;
 
-helpers.arrayWithHoles = () => template.program.ast`
+helpers.arrayWithHoles = helper("7.0.0-beta.0")`
   export default function _arrayWithHoles(arr) {
     if (Array.isArray(arr)) return arr;
   }
 `;
 
-helpers.iterableToArray = () => template.program.ast`
+helpers.iterableToArray = helper("7.0.0-beta.0")`
   export default function _iterableToArray(iter) {
     if (
       Symbol.iterator in Object(iter) ||
@@ -850,7 +857,7 @@ helpers.iterableToArray = () => template.program.ast`
   }
 `;
 
-helpers.iterableToArrayLimit = () => template.program.ast`
+helpers.iterableToArrayLimit = helper("7.0.0-beta.0")`
   export default function _iterableToArrayLimit(arr, i) {
     // this is an expanded form of \`for...of\` that properly supports abrupt completions of
     // iterators etc. variable names have been minimised to reduce the size of this massive
@@ -885,7 +892,7 @@ helpers.iterableToArrayLimit = () => template.program.ast`
   }
 `;
 
-helpers.iterableToArrayLimitLoose = () => template.program.ast`
+helpers.iterableToArrayLimitLoose = helper("7.0.0-beta.0")`
   export default function _iterableToArrayLimitLoose(arr, i) {
     var _arr = [];
     for (var _iterator = arr[Symbol.iterator](), _step; !(_step = _iterator.next()).done;) {
@@ -896,19 +903,19 @@ helpers.iterableToArrayLimitLoose = () => template.program.ast`
   }
 `;
 
-helpers.nonIterableSpread = () => template.program.ast`
+helpers.nonIterableSpread = helper("7.0.0-beta.0")`
   export default function _nonIterableSpread() {
     throw new TypeError("Invalid attempt to spread non-iterable instance");
   }
 `;
 
-helpers.nonIterableRest = () => template.program.ast`
+helpers.nonIterableRest = helper("7.0.0-beta.0")`
   export default function _nonIterableRest() {
     throw new TypeError("Invalid attempt to destructure non-iterable instance");
   }
 `;
 
-helpers.skipFirstGeneratorNext = () => template.program.ast`
+helpers.skipFirstGeneratorNext = helper("7.0.0-beta.0")`
   export default function _skipFirstGeneratorNext(fn) {
     return function () {
       var it = fn.apply(this, arguments);
@@ -918,7 +925,7 @@ helpers.skipFirstGeneratorNext = () => template.program.ast`
   }
 `;
 
-helpers.toPropertyKey = () => template.program.ast`
+helpers.toPropertyKey = helper("7.0.0-beta.0")`
   export default function _toPropertyKey(key) {
     if (typeof key === "symbol") {
       return key;
@@ -932,7 +939,7 @@ helpers.toPropertyKey = () => template.program.ast`
  * Add a helper that will throw a useful error if the transform fails to detect the class
  * property assignment, so users know something failed.
  */
-helpers.initializerWarningHelper = () => template.program.ast`
+helpers.initializerWarningHelper = helper("7.0.0-beta.0")`
     export default function _initializerWarningHelper(descriptor, context){
         throw new Error(
           'Decorating class property failed. Please ensure that ' +
@@ -946,7 +953,7 @@ helpers.initializerWarningHelper = () => template.program.ast`
 /**
  * Add a helper to call as a replacement for class property definition.
  */
-helpers.initializerDefineProperty = () => template.program.ast`
+helpers.initializerDefineProperty = helper("7.0.0-beta.0")`
     export default function _initializerDefineProperty(target, property, descriptor, context){
         if (!descriptor) return;
 
@@ -963,7 +970,7 @@ helpers.initializerDefineProperty = () => template.program.ast`
  * Add a helper to take an initial descriptor, apply some decorators to it, and optionally
  * define the property.
  */
-helpers.applyDecoratedDescriptor = () => template.program.ast`
+helpers.applyDecoratedDescriptor = helper("7.0.0-beta.0")`
     export default function _applyDecoratedDescriptor(target, property, decorators, descriptor, context){
         var desc = {};
         Object['ke' + 'ys'](descriptor).forEach(function(key){
@@ -995,14 +1002,14 @@ helpers.applyDecoratedDescriptor = () => template.program.ast`
     }
 `;
 
-helpers.classPrivateFieldLooseKey = () => template.program.ast`
+helpers.classPrivateFieldLooseKey = helper("7.0.0-beta.0")`
   var id = 0;
   export default function _classPrivateFieldKey(name) {
     return "__private_" + (id++) + "_" + name;
   }
 `;
 
-helpers.classPrivateFieldLooseBase = () => template.program.ast`
+helpers.classPrivateFieldLooseBase = helper("7.0.0-beta.0")`
   export default function _classPrivateFieldBase(receiver, privateKey) {
     if (!Object.prototype.hasOwnProperty.call(receiver, privateKey)) {
       throw new TypeError("attempted to use private field on non-instance");
@@ -1011,7 +1018,7 @@ helpers.classPrivateFieldLooseBase = () => template.program.ast`
   }
 `;
 
-helpers.classPrivateFieldGet = () => template.program.ast`
+helpers.classPrivateFieldGet = helper("7.0.0-beta.0")`
   export default function _classPrivateFieldGet(receiver, privateMap) {
     if (!privateMap.has(receiver)) {
       throw new TypeError("attempted to get private field on non-instance");
@@ -1020,7 +1027,7 @@ helpers.classPrivateFieldGet = () => template.program.ast`
   }
 `;
 
-helpers.classPrivateFieldSet = () => template.program.ast`
+helpers.classPrivateFieldSet = helper("7.0.0-beta.0")`
   export default function _classPrivateFieldSet(receiver, privateMap, value) {
     if (!privateMap.has(receiver)) {
       throw new TypeError("attempted to set private field on non-instance");

packages/babel-helpers/src/index.js

@@ -226,13 +226,19 @@ function permuteHelperAST(file, metadata, id, localBindings, getDependency) {
   });
 }
 
-const helperData = {};
+const helperData = Object.create(null);
 function loadHelper(name) {
   if (!helperData[name]) {
-    if (!helpers[name]) throw new ReferenceError(`Unknown helper ${name}`);
+    const helper = helpers[name];
+    if (!helper) {
+      throw Object.assign(new ReferenceError(`Unknown helper ${name}`), {
+        code: "BABEL_HELPER_UNKNOWN",
+        helper: name,
+      });
+    }
 
     const fn = () => {
-      return t.file(helpers[name]());
+      return t.file(helper.ast());
     };
 
     const metadata = getHelperMetadata(fn());
@@ -247,6 +253,9 @@ function loadHelper(name) {
           globals: metadata.globals,
         };
       },
+      minVersion() {
+        return helper.minVersion;
+      },
       dependencies: metadata.dependencies,
     };
   }
@@ -263,6 +272,10 @@ export function get(
   return loadHelper(name).build(getDependency, id, localBindings);
 }
 
+export function minVersion(name: string) {
+  return loadHelper(name).minVersion();
+}
+
 export function getDependencies(name: string): $ReadOnlyArray<string> {
   return Array.from(loadHelper(name).dependencies.values());
 }

packages/babel-helpers/test/helpers/define-helper.js

@@ -17,7 +17,10 @@ export default function defineHelper(
     throw new Error(`The ${id} helper is already defined.`);
   }
   Object.defineProperty(helpers, id, {
-    value: template.program(code),
+    value: {
+      minVersion: "7.0.0-beta.0",
+      ast: template.program(code),
+    },
   });
   return id;
 }

packages/babel-highlight/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/highlight",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Syntax highlight JavaScript strings for output in terminals.",
   "author": "suchipi <me@suchipi.com>",
   "homepage": "https://babeljs.io/",

packages/babel-node/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/node",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Babel command line",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -16,8 +16,8 @@
     "compiler"
   ],
   "dependencies": {
-    "@babel/polyfill": "7.0.0-beta.55",
-    "@babel/register": "7.0.0-beta.55",
+    "@babel/polyfill": "7.0.0-beta.56",
+    "@babel/register": "7.0.0-beta.56",
     "commander": "^2.8.1",
     "fs-readdir-recursive": "^1.0.0",
     "lodash": "^4.17.10",
@@ -28,8 +28,8 @@
     "@babel/core": ">=7.0.0-beta.50 <7.0.0-rc.0"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.55",
-    "@babel/helper-fixtures": "7.0.0-beta.55"
+    "@babel/core": "7.0.0-beta.56",
+    "@babel/helper-fixtures": "7.0.0-beta.56"
   },
   "bin": {
     "babel-node": "./bin/babel-node.js"

packages/babel-parser/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/parser",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "A JavaScript parser",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -23,7 +23,7 @@
     "node": ">=6.0.0"
   },
   "devDependencies": {
-    "@babel/helper-fixtures": "7.0.0-beta.55",
+    "@babel/helper-fixtures": "7.0.0-beta.56",
     "charcodes": "0.1.0",
     "unicode-11.0.0": "^0.7.7"
   },

packages/babel-parser/src/plugins/flow.js

@@ -1917,6 +1917,15 @@ export default (superClass: Class<Parser>): Class<Parser> =>
       return super.parseClassProperty(node);
     }
 
+    parseClassPrivateProperty(
+      node: N.ClassPrivateProperty,
+    ): N.ClassPrivateProperty {
+      if (this.match(tt.colon)) {
+        node.typeAnnotation = this.flowParseTypeAnnotation();
+      }
+      return super.parseClassPrivateProperty(node);
+    }
+
     // determine whether or not we're currently in the position where a class method would appear
     isClassMethod(): boolean {
       return this.isRelational("<") || super.isClassMethod();

packages/babel-parser/src/plugins/typescript.js

@@ -1535,6 +1535,17 @@ export default (superClass: Class<Parser>): Class<Parser> =>
         cls.abstract = true;
         return cls;
       }
+
+      // export default interface allowed in:
+      // https://github.com/Microsoft/TypeScript/pull/16040
+      if (this.state.value === "interface") {
+        return this.tsParseDeclaration(
+          this.startNode(),
+          this.state.value,
+          true,
+        );
+      }
+
       return super.parseExportDefaultExpression();
     }
 

packages/babel-parser/src/types.js

@@ -717,6 +717,7 @@ export type ClassPrivateProperty = NodeBase & {
   value: ?Expression, // TODO: Not in spec that this is nullable.
   static: boolean,
   computed: false,
+  typeAnnotation?: ?TypeAnnotation, // TODO: Not in spec
 };
 
 export type OptClassDeclaration = ClassBase &

packages/babel-parser/test/fixtures/flow/class-private-property/1/input.js

@@ -0,0 +1,4 @@
+class A {
+  #prop1: string;
+  #prop2: number = value;
+}

packages/babel-parser/test/fixtures/flow/class-private-property/1/output.json

@@ -0,0 +1,261 @@
+{
+  "type": "File",
+  "start": 0,
+  "end": 55,
+  "loc": {
+    "start": {
+      "line": 1,
+      "column": 0
+    },
+    "end": {
+      "line": 4,
+      "column": 1
+    }
+  },
+  "program": {
+    "type": "Program",
+    "start": 0,
+    "end": 55,
+    "loc": {
+      "start": {
+        "line": 1,
+        "column": 0
+      },
+      "end": {
+        "line": 4,
+        "column": 1
+      }
+    },
+    "sourceType": "module",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ClassDeclaration",
+        "start": 0,
+        "end": 55,
+        "loc": {
+          "start": {
+            "line": 1,
+            "column": 0
+          },
+          "end": {
+            "line": 4,
+            "column": 1
+          }
+        },
+        "id": {
+          "type": "Identifier",
+          "start": 6,
+          "end": 7,
+          "loc": {
+            "start": {
+              "line": 1,
+              "column": 6
+            },
+            "end": {
+              "line": 1,
+              "column": 7
+            },
+            "identifierName": "A"
+          },
+          "name": "A"
+        },
+        "superClass": null,
+        "body": {
+          "type": "ClassBody",
+          "start": 8,
+          "end": 55,
+          "loc": {
+            "start": {
+              "line": 1,
+              "column": 8
+            },
+            "end": {
+              "line": 4,
+              "column": 1
+            }
+          },
+          "body": [
+            {
+              "type": "ClassPrivateProperty",
+              "start": 12,
+              "end": 27,
+              "loc": {
+                "start": {
+                  "line": 2,
+                  "column": 2
+                },
+                "end": {
+                  "line": 2,
+                  "column": 17
+                }
+              },
+              "static": false,
+              "key": {
+                "type": "PrivateName",
+                "start": 12,
+                "end": 18,
+                "loc": {
+                  "start": {
+                    "line": 2,
+                    "column": 2
+                  },
+                  "end": {
+                    "line": 2,
+                    "column": 8
+                  }
+                },
+                "id": {
+                  "type": "Identifier",
+                  "start": 13,
+                  "end": 18,
+                  "loc": {
+                    "start": {
+                      "line": 2,
+                      "column": 3
+                    },
+                    "end": {
+                      "line": 2,
+                      "column": 8
+                    },
+                    "identifierName": "prop1"
+                  },
+                  "name": "prop1"
+                }
+              },
+              "variance": null,
+              "typeAnnotation": {
+                "type": "TypeAnnotation",
+                "start": 18,
+                "end": 26,
+                "loc": {
+                  "start": {
+                    "line": 2,
+                    "column": 8
+                  },
+                  "end": {
+                    "line": 2,
+                    "column": 16
+                  }
+                },
+                "typeAnnotation": {
+                  "type": "StringTypeAnnotation",
+                  "start": 20,
+                  "end": 26,
+                  "loc": {
+                    "start": {
+                      "line": 2,
+                      "column": 10
+                    },
+                    "end": {
+                      "line": 2,
+                      "column": 16
+                    }
+                  }
+                }
+              },
+              "value": null
+            },
+            {
+              "type": "ClassPrivateProperty",
+              "start": 30,
+              "end": 53,
+              "loc": {
+                "start": {
+                  "line": 3,
+                  "column": 2
+                },
+                "end": {
+                  "line": 3,
+                  "column": 25
+                }
+              },
+              "static": false,
+              "key": {
+                "type": "PrivateName",
+                "start": 30,
+                "end": 36,
+                "loc": {
+                  "start": {
+                    "line": 3,
+                    "column": 2
+                  },
+                  "end": {
+                    "line": 3,
+                    "column": 8
+                  }
+                },
+                "id": {
+                  "type": "Identifier",
+                  "start": 31,
+                  "end": 36,
+                  "loc": {
+                    "start": {
+                      "line": 3,
+                      "column": 3
+                    },
+                    "end": {
+                      "line": 3,
+                      "column": 8
+                    },
+                    "identifierName": "prop2"
+                  },
+                  "name": "prop2"
+                }
+              },
+              "variance": null,
+              "typeAnnotation": {
+                "type": "TypeAnnotation",
+                "start": 36,
+                "end": 44,
+                "loc": {
+                  "start": {
+                    "line": 3,
+                    "column": 8
+                  },
+                  "end": {
+                    "line": 3,
+                    "column": 16
+                  }
+                },
+                "typeAnnotation": {
+                  "type": "NumberTypeAnnotation",
+                  "start": 38,
+                  "end": 44,
+                  "loc": {
+                    "start": {
+                      "line": 3,
+                      "column": 10
+                    },
+                    "end": {
+                      "line": 3,
+                      "column": 16
+                    }
+                  }
+                }
+              },
+              "value": {
+                "type": "Identifier",
+                "start": 47,
+                "end": 52,
+                "loc": {
+                  "start": {
+                    "line": 3,
+                    "column": 19
+                  },
+                  "end": {
+                    "line": 3,
+                    "column": 24
+                  },
+                  "identifierName": "value"
+                },
+                "name": "value"
+              }
+            }
+          ]
+        }
+      }
+    ],
+    "directives": []
+  }
+}

packages/babel-parser/test/fixtures/flow/class-private-property/2/input.js

@@ -0,0 +1,4 @@
+class A {
+  #prop1: string;
+  #prop2: number;
+}

packages/babel-parser/test/fixtures/flow/class-private-property/2/output.json

@@ -0,0 +1,245 @@
+{
+  "type": "File",
+  "start": 0,
+  "end": 47,
+  "loc": {
+    "start": {
+      "line": 1,
+      "column": 0
+    },
+    "end": {
+      "line": 4,
+      "column": 1
+    }
+  },
+  "program": {
+    "type": "Program",
+    "start": 0,
+    "end": 47,
+    "loc": {
+      "start": {
+        "line": 1,
+        "column": 0
+      },
+      "end": {
+        "line": 4,
+        "column": 1
+      }
+    },
+    "sourceType": "module",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ClassDeclaration",
+        "start": 0,
+        "end": 47,
+        "loc": {
+          "start": {
+            "line": 1,
+            "column": 0
+          },
+          "end": {
+            "line": 4,
+            "column": 1
+          }
+        },
+        "id": {
+          "type": "Identifier",
+          "start": 6,
+          "end": 7,
+          "loc": {
+            "start": {
+              "line": 1,
+              "column": 6
+            },
+            "end": {
+              "line": 1,
+              "column": 7
+            },
+            "identifierName": "A"
+          },
+          "name": "A"
+        },
+        "superClass": null,
+        "body": {
+          "type": "ClassBody",
+          "start": 8,
+          "end": 47,
+          "loc": {
+            "start": {
+              "line": 1,
+              "column": 8
+            },
+            "end": {
+              "line": 4,
+              "column": 1
+            }
+          },
+          "body": [
+            {
+              "type": "ClassPrivateProperty",
+              "start": 12,
+              "end": 27,
+              "loc": {
+                "start": {
+                  "line": 2,
+                  "column": 2
+                },
+                "end": {
+                  "line": 2,
+                  "column": 17
+                }
+              },
+              "static": false,
+              "key": {
+                "type": "PrivateName",
+                "start": 12,
+                "end": 18,
+                "loc": {
+                  "start": {
+                    "line": 2,
+                    "column": 2
+                  },
+                  "end": {
+                    "line": 2,
+                    "column": 8
+                  }
+                },
+                "id": {
+                  "type": "Identifier",
+                  "start": 13,
+                  "end": 18,
+                  "loc": {
+                    "start": {
+                      "line": 2,
+                      "column": 3
+                    },
+                    "end": {
+                      "line": 2,
+                      "column": 8
+                    },
+                    "identifierName": "prop1"
+                  },
+                  "name": "prop1"
+                }
+              },
+              "variance": null,
+              "typeAnnotation": {
+                "type": "TypeAnnotation",
+                "start": 18,
+                "end": 26,
+                "loc": {
+                  "start": {
+                    "line": 2,
+                    "column": 8
+                  },
+                  "end": {
+                    "line": 2,
+                    "column": 16
+                  }
+                },
+                "typeAnnotation": {
+                  "type": "StringTypeAnnotation",
+                  "start": 20,
+                  "end": 26,
+                  "loc": {
+                    "start": {
+                      "line": 2,
+                      "column": 10
+                    },
+                    "end": {
+                      "line": 2,
+                      "column": 16
+                    }
+                  }
+                }
+              },
+              "value": null
+            },
+            {
+              "type": "ClassPrivateProperty",
+              "start": 30,
+              "end": 45,
+              "loc": {
+                "start": {
+                  "line": 3,
+                  "column": 2
+                },
+                "end": {
+                  "line": 3,
+                  "column": 17
+                }
+              },
+              "static": false,
+              "key": {
+                "type": "PrivateName",
+                "start": 30,
+                "end": 36,
+                "loc": {
+                  "start": {
+                    "line": 3,
+                    "column": 2
+                  },
+                  "end": {
+                    "line": 3,
+                    "column": 8
+                  }
+                },
+                "id": {
+                  "type": "Identifier",
+                  "start": 31,
+                  "end": 36,
+                  "loc": {
+                    "start": {
+                      "line": 3,
+                      "column": 3
+                    },
+                    "end": {
+                      "line": 3,
+                      "column": 8
+                    },
+                    "identifierName": "prop2"
+                  },
+                  "name": "prop2"
+                }
+              },
+              "variance": null,
+              "typeAnnotation": {
+                "type": "TypeAnnotation",
+                "start": 36,
+                "end": 44,
+                "loc": {
+                  "start": {
+                    "line": 3,
+                    "column": 8
+                  },
+                  "end": {
+                    "line": 3,
+                    "column": 16
+                  }
+                },
+                "typeAnnotation": {
+                  "type": "NumberTypeAnnotation",
+                  "start": 38,
+                  "end": 44,
+                  "loc": {
+                    "start": {
+                      "line": 3,
+                      "column": 10
+                    },
+                    "end": {
+                      "line": 3,
+                      "column": 16
+                    }
+                  }
+                }
+              },
+              "value": null
+            }
+          ]
+        }
+      }
+    ],
+    "directives": []
+  }
+}

packages/babel-parser/test/fixtures/flow/class-private-property/options.json

@@ -0,0 +1,4 @@
+{
+  "sourceType": "module",
+  "plugins": [ "flow", "classPrivateProperties" ]
+}

packages/babel-parser/test/fixtures/typescript/interface/export/input.js

@@ -1,2 +1,2 @@
 export interface I {}
-// `export default` does not work with interfaces
+export default interface A {}

packages/babel-parser/test/fixtures/typescript/interface/export/output.json

@@ -1,7 +1,7 @@
 {
   "type": "File",
   "start": 0,
-  "end": 71,
+  "end": 51,
   "loc": {
     "start": {
       "line": 1,
@@ -9,13 +9,13 @@
     },
     "end": {
       "line": 2,
-      "column": 49
+      "column": 29
     }
   },
   "program": {
     "type": "Program",
     "start": 0,
-    "end": 71,
+    "end": 51,
     "loc": {
       "start": {
         "line": 1,
@@ -23,7 +23,7 @@
       },
       "end": {
         "line": 2,
-        "column": 49
+        "column": 29
       }
     },
     "sourceType": "module",
@@ -92,45 +92,72 @@
             },
             "body": []
           }
+        }
+      },
+      {
+        "type": "ExportDefaultDeclaration",
+        "start": 22,
+        "end": 51,
+        "loc": {
+          "start": {
+            "line": 2,
+            "column": 0
+          },
+          "end": {
+            "line": 2,
+            "column": 29
+          }
         },
-        "trailingComments": [
-          {
-            "type": "CommentLine",
-            "value": " `export default` does not work with interfaces",
-            "start": 22,
-            "end": 71,
+        "declaration": {
+          "type": "TSInterfaceDeclaration",
+          "start": 37,
+          "end": 51,
+          "loc": {
+            "start": {
+              "line": 2,
+              "column": 15
+            },
+            "end": {
+              "line": 2,
+              "column": 29
+            }
+          },
+          "id": {
+            "type": "Identifier",
+            "start": 47,
+            "end": 48,
             "loc": {
               "start": {
                 "line": 2,
-                "column": 0
+                "column": 25
               },
               "end": {
                 "line": 2,
-                "column": 49
+                "column": 26
+              },
+              "identifierName": "A"
+            },
+            "name": "A"
+          },
+          "body": {
+            "type": "TSInterfaceBody",
+            "start": 49,
+            "end": 51,
+            "loc": {
+              "start": {
+                "line": 2,
+                "column": 27
+              },
+              "end": {
+                "line": 2,
+                "column": 29
               }
-            }
+            },
+            "body": []
           }
-        ]
+        }
       }
     ],
     "directives": []
-  },
-  "comments": [
-    {
-      "type": "CommentLine",
-      "value": " `export default` does not work with interfaces",
-      "start": 22,
-      "end": 71,
-      "loc": {
-        "start": {
-          "line": 2,
-          "column": 0
-        },
-        "end": {
-          "line": 2,
-          "column": 49
-        }
-      }
-    }
-  ]
+  }
 }

packages/babel-plugin-external-helpers/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-external-helpers",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "This plugin contains helper functions that’ll be placed at the top of the generated code",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-external-helpers",
   "license": "MIT",
@@ -9,13 +9,13 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-plugin-utils": "7.0.0-beta.55"
+    "@babel/helper-plugin-utils": "7.0.0-beta.56"
   },
   "peerDependencies": {
     "@babel/core": ">=7.0.0-beta.50 <7.0.0-rc.0"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.55",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.55"
+    "@babel/core": "7.0.0-beta.56",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.56"
   }
 }

packages/babel-plugin-external-helpers/src/index.js

@@ -1,12 +1,29 @@
 import { declare } from "@babel/helper-plugin-utils";
 import { types as t } from "@babel/core";
 
-export default declare(api => {
+export default declare((api, options) => {
   api.assertVersion(7);
 
+  const { helperVersion = "7.0.0-beta.0" } = options;
+
   return {
     pre(file) {
-      file.set("helpersNamespace", t.identifier("babelHelpers"));
+      file.set("helperGenerator", name => {
+        // If the helper didn't exist yet at the version given, we bail
+        // out and let Babel either insert it directly, or throw an error
+        // so that plugins can handle that case properly.
+        if (
+          file.availableHelper &&
+          !file.availableHelper(name, helperVersion)
+        ) {
+          return;
+        }
+
+        return t.memberExpression(
+          t.identifier("babelHelpers"),
+          t.identifier(name),
+        );
+      });
     },
   };
 });

packages/babel-plugin-proposal-async-generator-functions/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-proposal-async-generator-functions",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "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",
@@ -9,15 +9,15 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-plugin-utils": "7.0.0-beta.55",
-    "@babel/helper-remap-async-to-generator": "7.0.0-beta.55",
-    "@babel/plugin-syntax-async-generators": "7.0.0-beta.55"
+    "@babel/helper-plugin-utils": "7.0.0-beta.56",
+    "@babel/helper-remap-async-to-generator": "7.0.0-beta.56",
+    "@babel/plugin-syntax-async-generators": "7.0.0-beta.56"
   },
   "peerDependencies": {
     "@babel/core": ">=7.0.0-beta.50 <7.0.0-rc.0"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.55",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.55"
+    "@babel/core": "7.0.0-beta.56",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.56"
   }
 }

packages/babel-plugin-proposal-class-properties/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-proposal-class-properties",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "This plugin transforms static class properties as well as properties declared with the property initializer syntax",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-proposal-class-properties",
   "license": "MIT",
@@ -9,18 +9,18 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-function-name": "7.0.0-beta.55",
-    "@babel/helper-member-expression-to-functions": "7.0.0-beta.55",
-    "@babel/helper-optimise-call-expression": "7.0.0-beta.55",
-    "@babel/helper-plugin-utils": "7.0.0-beta.55",
-    "@babel/helper-replace-supers": "7.0.0-beta.55",
-    "@babel/plugin-syntax-class-properties": "7.0.0-beta.55"
+    "@babel/helper-function-name": "7.0.0-beta.56",
+    "@babel/helper-member-expression-to-functions": "7.0.0-beta.56",
+    "@babel/helper-optimise-call-expression": "7.0.0-beta.56",
+    "@babel/helper-plugin-utils": "7.0.0-beta.56",
+    "@babel/helper-replace-supers": "7.0.0-beta.56",
+    "@babel/plugin-syntax-class-properties": "7.0.0-beta.56"
   },
   "peerDependencies": {
     "@babel/core": ">=7.0.0-beta.50 <7.0.0-rc.0"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.55",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.55"
+    "@babel/core": "7.0.0-beta.56",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.56"
   }
 }

packages/babel-plugin-proposal-decorators/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-proposal-decorators",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "author": "Logan Smyth <loganfsmyth@gmail.com>",
   "license": "MIT",
   "description": "Compile class and object decorators to ES5",
@@ -12,14 +12,14 @@
     "decorators"
   ],
   "dependencies": {
-    "@babel/helper-plugin-utils": "7.0.0-beta.55",
-    "@babel/plugin-syntax-decorators": "7.0.0-beta.55"
+    "@babel/helper-plugin-utils": "7.0.0-beta.56",
+    "@babel/plugin-syntax-decorators": "7.0.0-beta.56"
   },
   "peerDependencies": {
     "@babel/core": ">=7.0.0-beta.50 <7.0.0-rc.0"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.55",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.55"
+    "@babel/core": "7.0.0-beta.56",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.56"
   }
 }

packages/babel-plugin-proposal-do-expressions/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-proposal-do-expressions",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Compile do expressions to ES5",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-proposal-do-expressions",
   "license": "MIT",
@@ -9,14 +9,14 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-plugin-utils": "7.0.0-beta.55",
-    "@babel/plugin-syntax-do-expressions": "7.0.0-beta.55"
+    "@babel/helper-plugin-utils": "7.0.0-beta.56",
+    "@babel/plugin-syntax-do-expressions": "7.0.0-beta.56"
   },
   "peerDependencies": {
     "@babel/core": ">=7.0.0-beta.50 <7.0.0-rc.0"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.55",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.55"
+    "@babel/core": "7.0.0-beta.56",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.56"
   }
 }

packages/babel-plugin-proposal-export-default-from/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-proposal-export-default-from",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Compile export default to ES2015",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-proposal-export-default-from",
   "license": "MIT",
@@ -9,14 +9,14 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-plugin-utils": "7.0.0-beta.55",
-    "@babel/plugin-syntax-export-default-from": "7.0.0-beta.55"
+    "@babel/helper-plugin-utils": "7.0.0-beta.56",
+    "@babel/plugin-syntax-export-default-from": "7.0.0-beta.56"
   },
   "peerDependencies": {
     "@babel/core": ">=7.0.0-beta.50 <7.0.0-rc.0"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.55",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.55"
+    "@babel/core": "7.0.0-beta.56",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.56"
   }
 }

packages/babel-plugin-proposal-export-namespace-from/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-proposal-export-namespace-from",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Compile export namespace to ES2015",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-proposal-export-namespace-from",
   "license": "MIT",
@@ -9,14 +9,14 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-plugin-utils": "7.0.0-beta.55",
-    "@babel/plugin-syntax-export-namespace-from": "7.0.0-beta.55"
+    "@babel/helper-plugin-utils": "7.0.0-beta.56",
+    "@babel/plugin-syntax-export-namespace-from": "7.0.0-beta.56"
   },
   "peerDependencies": {
     "@babel/core": ">=7.0.0-beta.50 <7.0.0-rc.0"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.55",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.55"
+    "@babel/core": "7.0.0-beta.56",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.56"
   }
 }

packages/babel-plugin-proposal-function-bind/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-proposal-function-bind",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Compile function bind operator to ES5",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-proposal-function-bind",
   "license": "MIT",
@@ -9,14 +9,14 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-plugin-utils": "7.0.0-beta.55",
-    "@babel/plugin-syntax-function-bind": "7.0.0-beta.55"
+    "@babel/helper-plugin-utils": "7.0.0-beta.56",
+    "@babel/plugin-syntax-function-bind": "7.0.0-beta.56"
   },
   "peerDependencies": {
     "@babel/core": ">=7.0.0-beta.50 <7.0.0-rc.0"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.55",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.55"
+    "@babel/core": "7.0.0-beta.56",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.56"
   }
 }

packages/babel-plugin-proposal-function-sent/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-proposal-function-sent",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Compile the function.sent meta propety to valid ES2015 code",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-proposal-function-sent",
   "license": "MIT",
@@ -9,15 +9,15 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-plugin-utils": "7.0.0-beta.55",
-    "@babel/helper-wrap-function": "7.0.0-beta.55",
-    "@babel/plugin-syntax-function-sent": "7.0.0-beta.55"
+    "@babel/helper-plugin-utils": "7.0.0-beta.56",
+    "@babel/helper-wrap-function": "7.0.0-beta.56",
+    "@babel/plugin-syntax-function-sent": "7.0.0-beta.56"
   },
   "peerDependencies": {
     "@babel/core": ">=7.0.0-beta.50 <7.0.0-rc.0"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.55",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.55"
+    "@babel/core": "7.0.0-beta.56",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.56"
   }
 }

packages/babel-plugin-proposal-json-strings/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-proposal-json-strings",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Escape U+2028 LINE SEPARATOR and U+2029 PARAGRAPH SEPARATOR in JS strings",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-proposal-json-strings",
   "license": "MIT",
@@ -9,14 +9,14 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-plugin-utils": "7.0.0-beta.55",
-    "@babel/plugin-syntax-json-strings": "7.0.0-beta.55"
+    "@babel/helper-plugin-utils": "7.0.0-beta.56",
+    "@babel/plugin-syntax-json-strings": "7.0.0-beta.56"
   },
   "peerDependencies": {
     "@babel/core": ">=7.0.0-beta.50 <7.0.0-rc.0"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.55",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.55"
+    "@babel/core": "7.0.0-beta.56",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.56"
   }
 }

packages/babel-plugin-proposal-logical-assignment-operators/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-proposal-logical-assignment-operators",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Transforms logical assignment operators into short-circuited assignments",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-proposal-logical-assignment-operators",
   "license": "MIT",
@@ -9,16 +9,16 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-plugin-utils": "7.0.0-beta.55",
-    "@babel/plugin-syntax-logical-assignment-operators": "7.0.0-beta.55"
+    "@babel/helper-plugin-utils": "7.0.0-beta.56",
+    "@babel/plugin-syntax-logical-assignment-operators": "7.0.0-beta.56"
   },
   "peerDependencies": {
     "@babel/core": ">=7.0.0-beta.50 <7.0.0-rc.0"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.55",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.55",
-    "@babel/plugin-proposal-nullish-coalescing-operator": "7.0.0-beta.55",
-    "@babel/plugin-syntax-nullish-coalescing-operator": "7.0.0-beta.55"
+    "@babel/core": "7.0.0-beta.56",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.56",
+    "@babel/plugin-proposal-nullish-coalescing-operator": "7.0.0-beta.56",
+    "@babel/plugin-syntax-nullish-coalescing-operator": "7.0.0-beta.56"
   }
 }

packages/babel-plugin-proposal-nullish-coalescing-operator/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-proposal-nullish-coalescing-operator",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Remove nullish coalescing operator",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-nullish-coalescing-opearator",
   "license": "MIT",
@@ -9,14 +9,14 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-plugin-utils": "7.0.0-beta.55",
-    "@babel/plugin-syntax-nullish-coalescing-operator": "7.0.0-beta.55"
+    "@babel/helper-plugin-utils": "7.0.0-beta.56",
+    "@babel/plugin-syntax-nullish-coalescing-operator": "7.0.0-beta.56"
   },
   "peerDependencies": {
     "@babel/core": ">=7.0.0-beta.50 <7.0.0-rc.0"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.55",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.55"
+    "@babel/core": "7.0.0-beta.56",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.56"
   }
 }

packages/babel-plugin-proposal-numeric-separator/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-proposal-numeric-separator",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Remove numeric separators from Decimal, Binary, Hex and Octal literals",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-proposal-numeric-separator",
   "license": "MIT",
@@ -9,14 +9,14 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-plugin-utils": "7.0.0-beta.55",
-    "@babel/plugin-syntax-numeric-separator": "7.0.0-beta.55"
+    "@babel/helper-plugin-utils": "7.0.0-beta.56",
+    "@babel/plugin-syntax-numeric-separator": "7.0.0-beta.56"
   },
   "peerDependencies": {
     "@babel/core": ">=7.0.0-beta.50 <7.0.0-rc.0"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.55",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.55"
+    "@babel/core": "7.0.0-beta.56",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.56"
   }
 }

packages/babel-plugin-proposal-object-rest-spread/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-proposal-object-rest-spread",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Compile object rest and spread to ES5",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-proposal-object-rest-spread",
   "license": "MIT",
@@ -9,14 +9,14 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-plugin-utils": "7.0.0-beta.55",
-    "@babel/plugin-syntax-object-rest-spread": "7.0.0-beta.55"
+    "@babel/helper-plugin-utils": "7.0.0-beta.56",
+    "@babel/plugin-syntax-object-rest-spread": "7.0.0-beta.56"
   },
   "peerDependencies": {
     "@babel/core": ">=7.0.0-beta.50 <7.0.0-rc.0"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.55",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.55"
+    "@babel/core": "7.0.0-beta.56",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.56"
   }
 }

packages/babel-plugin-proposal-optional-catch-binding/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-proposal-optional-catch-binding",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Compile optional catch bindings",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-proposal-optional-catch-binding",
   "license": "MIT",
@@ -9,14 +9,14 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-plugin-utils": "7.0.0-beta.55",
-    "@babel/plugin-syntax-optional-catch-binding": "7.0.0-beta.55"
+    "@babel/helper-plugin-utils": "7.0.0-beta.56",
+    "@babel/plugin-syntax-optional-catch-binding": "7.0.0-beta.56"
   },
   "peerDependencies": {
     "@babel/core": ">=7.0.0-beta.50 <7.0.0-rc.0"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.55",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.55"
+    "@babel/core": "7.0.0-beta.56",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.56"
   }
 }

packages/babel-plugin-proposal-optional-chaining/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-proposal-optional-chaining",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Transform optional chaining operators into a series of nil checks",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-proposal-optional-chaining",
   "license": "MIT",
@@ -9,15 +9,15 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-plugin-utils": "7.0.0-beta.55",
-    "@babel/plugin-syntax-optional-chaining": "7.0.0-beta.55"
+    "@babel/helper-plugin-utils": "7.0.0-beta.56",
+    "@babel/plugin-syntax-optional-chaining": "7.0.0-beta.56"
   },
   "peerDependencies": {
     "@babel/core": ">=7.0.0-beta.50 <7.0.0-rc.0"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.55",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.55",
-    "@babel/plugin-transform-block-scoping": "7.0.0-beta.55"
+    "@babel/core": "7.0.0-beta.56",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.56",
+    "@babel/plugin-transform-block-scoping": "7.0.0-beta.56"
   }
 }

packages/babel-plugin-proposal-pipeline-operator/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-proposal-pipeline-operator",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Transform pipeline operator into call expressions",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-proposal-pipeline-operator",
   "license": "MIT",
@@ -9,14 +9,14 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-plugin-utils": "7.0.0-beta.55",
-    "@babel/plugin-syntax-pipeline-operator": "7.0.0-beta.55"
+    "@babel/helper-plugin-utils": "7.0.0-beta.56",
+    "@babel/plugin-syntax-pipeline-operator": "7.0.0-beta.56"
   },
   "peerDependencies": {
     "@babel/core": ">=7.0.0-beta.50 <7.0.0-rc.0"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.55",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.55"
+    "@babel/core": "7.0.0-beta.56",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.56"
   }
 }

packages/babel-plugin-proposal-throw-expressions/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-proposal-throw-expressions",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Wraps Throw Expressions in an IIFE",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-proposal-throw-expressions",
   "license": "MIT",
@@ -9,14 +9,14 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-plugin-utils": "7.0.0-beta.55",
-    "@babel/plugin-syntax-throw-expressions": "7.0.0-beta.55"
+    "@babel/helper-plugin-utils": "7.0.0-beta.56",
+    "@babel/plugin-syntax-throw-expressions": "7.0.0-beta.56"
   },
   "peerDependencies": {
     "@babel/core": ">=7.0.0-beta.50 <7.0.0-rc.0"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.55",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.55"
+    "@babel/core": "7.0.0-beta.56",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.56"
   }
 }

packages/babel-plugin-proposal-unicode-property-regex/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-proposal-unicode-property-regex",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Compile Unicode property escapes in Unicode regular expressions to ES5.",
   "homepage": "https://babeljs.io/",
   "license": "MIT",
@@ -19,15 +19,15 @@
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-proposal-unicode-property-regex",
   "bugs": "https://github.com/babel/babel/issues",
   "dependencies": {
-    "@babel/helper-plugin-utils": "7.0.0-beta.55",
-    "@babel/helper-regex": "7.0.0-beta.55",
+    "@babel/helper-plugin-utils": "7.0.0-beta.56",
+    "@babel/helper-regex": "7.0.0-beta.56",
     "regexpu-core": "^4.2.0"
   },
   "peerDependencies": {
     "@babel/core": ">=7.0.0-beta.50 <7.0.0-rc.0"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.55",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.55"
+    "@babel/core": "7.0.0-beta.56",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.56"
   }
 }

packages/babel-plugin-syntax-async-generators/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-syntax-async-generators",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Allow parsing of async generator functions",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-syntax-async-generators",
   "license": "MIT",
@@ -9,12 +9,12 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-plugin-utils": "7.0.0-beta.55"
+    "@babel/helper-plugin-utils": "7.0.0-beta.56"
   },
   "peerDependencies": {
     "@babel/core": ">=7.0.0-beta.50 <7.0.0-rc.0"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.55"
+    "@babel/core": "7.0.0-beta.56"
   }
 }

packages/babel-plugin-syntax-bigint/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-syntax-bigint",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Allow parsing of BigInt literals",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-bigint",
   "license": "MIT",
@@ -9,12 +9,12 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-plugin-utils": "7.0.0-beta.55"
+    "@babel/helper-plugin-utils": "7.0.0-beta.56"
   },
   "peerDependencies": {
     "@babel/core": ">=7.0.0-beta.50 <7.0.0-rc.0"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.55"
+    "@babel/core": "7.0.0-beta.56"
   }
 }

packages/babel-plugin-syntax-class-properties/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-syntax-class-properties",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Allow parsing of class properties",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-syntax-class-properties",
   "license": "MIT",
@@ -9,12 +9,12 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-plugin-utils": "7.0.0-beta.55"
+    "@babel/helper-plugin-utils": "7.0.0-beta.56"
   },
   "peerDependencies": {
     "@babel/core": ">=7.0.0-beta.50 <7.0.0-rc.0"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.55"
+    "@babel/core": "7.0.0-beta.56"
   }
 }

packages/babel-plugin-syntax-decorators/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-syntax-decorators",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Allow parsing of decorators",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-syntax-decorators",
   "license": "MIT",
@@ -9,12 +9,12 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-plugin-utils": "7.0.0-beta.55"
+    "@babel/helper-plugin-utils": "7.0.0-beta.56"
   },
   "peerDependencies": {
     "@babel/core": ">=7.0.0-beta.50 <7.0.0-rc.0"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.55"
+    "@babel/core": "7.0.0-beta.56"
   }
 }

packages/babel-plugin-syntax-do-expressions/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-syntax-do-expressions",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Allow parsing of do expressions",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-syntax-do-expressions",
   "license": "MIT",
@@ -9,12 +9,12 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-plugin-utils": "7.0.0-beta.55"
+    "@babel/helper-plugin-utils": "7.0.0-beta.56"
   },
   "peerDependencies": {
     "@babel/core": ">=7.0.0-beta.50 <7.0.0-rc.0"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.55"
+    "@babel/core": "7.0.0-beta.56"
   }
 }

packages/babel-plugin-syntax-dynamic-import/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-syntax-dynamic-import",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Allow parsing of import()",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-syntax-dynamic-import",
   "license": "MIT",
@@ -9,12 +9,12 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-plugin-utils": "7.0.0-beta.55"
+    "@babel/helper-plugin-utils": "7.0.0-beta.56"
   },
   "peerDependencies": {
     "@babel/core": ">=7.0.0-beta.50 <7.0.0-rc.0"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.55"
+    "@babel/core": "7.0.0-beta.56"
   }
 }

packages/babel-plugin-syntax-export-default-from/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-syntax-export-default-from",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Allow parsing of export default from",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-syntax-export-default-from",
   "license": "MIT",
@@ -9,12 +9,12 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-plugin-utils": "7.0.0-beta.55"
+    "@babel/helper-plugin-utils": "7.0.0-beta.56"
   },
   "peerDependencies": {
     "@babel/core": ">=7.0.0-beta.50 <7.0.0-rc.0"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.55"
+    "@babel/core": "7.0.0-beta.56"
   }
 }

packages/babel-plugin-syntax-export-namespace-from/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-syntax-export-namespace-from",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Allow parsing of export namespace from",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-syntax-export-namespace-from",
   "license": "MIT",
@@ -9,12 +9,12 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-plugin-utils": "7.0.0-beta.55"
+    "@babel/helper-plugin-utils": "7.0.0-beta.56"
   },
   "peerDependencies": {
     "@babel/core": ">=7.0.0-beta.50 <7.0.0-rc.0"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.55"
+    "@babel/core": "7.0.0-beta.56"
   }
 }

packages/babel-plugin-syntax-flow/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-syntax-flow",
-  "version": "7.0.0-beta.55",
+  "version": "7.0.0-beta.56",
   "description": "Allow parsing of the flow syntax",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-syntax-flow",
   "license": "MIT",
@@ -9,12 +9,12 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-plugin-utils": "7.0.0-beta.55"
+    "@babel/helper-plugin-utils": "7.0.0-beta.56"
   },
   "peerDependencies": {
     "@babel/core": ">=7.0.0-beta.50 <7.0.0-rc.0"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.55"
+    "@babel/core": "7.0.0-beta.56"
   }
 }