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Expose a minimum required Babel version for each helper.

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This commit is contained in:
Logan Smyth 2018-08-02 18:21:53 -07:00
parent 5c728ea609
commit eb0e999987
3 changed files with 88 additions and 65 deletions
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129
packages/babel-helpers/src/helpers.js
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@ -1,9 +1,16 @@
// @flow
import template from "@babel/template"; import template from "@babel/template";
const helpers = {}; const helpers = Object.create(null);
export default helpers; 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) { export default function _typeof(obj) {
if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") {
_typeof = function (obj) { return typeof obj; }; _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; var REACT_ELEMENT_TYPE;
export default function _createRawReactElement(type, props, key, children) { 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) { export default function _asyncIterator(iterable) {
var method var method
if (typeof Symbol === "function") { 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) { export default function _AwaitValue(value) {
this.wrapped = value; this.wrapped = value;
} }
`; `;
helpers.AsyncGenerator = () => template.program.ast` helpers.AsyncGenerator = helper("7.0.0-beta.0")`
import AwaitValue from "AwaitValue"; import AwaitValue from "AwaitValue";
export default function AsyncGenerator(gen) { export default function AsyncGenerator(gen) {
@ -177,7 +184,7 @@ helpers.AsyncGenerator = () => template.program.ast`
AsyncGenerator.prototype.return = function (arg) { return this._invoke("return", arg); }; 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"; import AsyncGenerator from "AsyncGenerator";
export default function _wrapAsyncGenerator(fn) { 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"; import AwaitValue from "AwaitValue";
export default function _awaitAsyncGenerator(value) { 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) { export default function _asyncGeneratorDelegate(inner, awaitWrap) {
var iter = {}, waiting = false; 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) { function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) {
try { try {
var info = gen[key](arg); 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) { export default function _classCallCheck(instance, Constructor) {
if (!(instance instanceof Constructor)) { if (!(instance instanceof Constructor)) {
throw new TypeError("Cannot call a class as a function"); 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) { function _defineProperties(target, props) {
for (var i = 0; i < props.length; i ++) { for (var i = 0; i < props.length; i ++) {
var descriptor = props[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) { export default function _defineEnumerableProperties(obj, descs) {
for (var key in descs) { for (var key in descs) {
var desc = descs[key]; 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) { export default function _defaults(obj, defaults) {
var keys = Object.getOwnPropertyNames(defaults); var keys = Object.getOwnPropertyNames(defaults);
for (var i = 0; i < keys.length; i++) { 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) { export default function _defineProperty(obj, key, value) {
// Shortcircuit the slow defineProperty path when possible. // Shortcircuit the slow defineProperty path when possible.
// We are trying to avoid issues where setters defined on the // 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() { export default function _extends() {
_extends = Object.assign || function (target) { _extends = Object.assign || function (target) {
for (var i = 1; i < arguments.length; i++) { 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"; import defineProperty from "defineProperty";
export default function _objectSpread(target) { 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"; import setPrototypeOf from "setPrototypeOf";
export default function _inherits(subClass, superClass) { 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) { export default function _inheritsLoose(subClass, superClass) {
subClass.prototype = Object.create(superClass.prototype); subClass.prototype = Object.create(superClass.prototype);
subClass.prototype.constructor = subClass; 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) { export default function _getPrototypeOf(o) {
_getPrototypeOf = Object.setPrototypeOf _getPrototypeOf = Object.setPrototypeOf
? Object.getPrototypeOf ? 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) { export default function _setPrototypeOf(o, p) {
_setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {
o.__proto__ = 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"; import setPrototypeOf from "setPrototypeOf";
function isNativeReflectConstruct() { function isNativeReflectConstruct() {
@ -492,7 +499,7 @@ helpers.construct = () => template.program.ast`
`; `;
// Based on https://github.com/WebReflection/babel-plugin-transform-builtin-classes // 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 getPrototypeOf from "getPrototypeOf";
import setPrototypeOf from "setPrototypeOf"; import setPrototypeOf from "setPrototypeOf";
import construct from "construct"; 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) { export default function _instanceof(left, right) {
if (right != null && typeof Symbol !== "undefined" && right[Symbol.hasInstance]) { if (right != null && typeof Symbol !== "undefined" && right[Symbol.hasInstance]) {
return right[Symbol.hasInstance](left); 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) { export default function _interopRequireDefault(obj) {
return obj && obj.__esModule ? obj : { default: 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) { export default function _interopRequireWildcard(obj) {
if (obj && obj.__esModule) { if (obj && obj.__esModule) {
return obj; 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) { export default function _newArrowCheck(innerThis, boundThis) {
if (innerThis !== boundThis) { if (innerThis !== boundThis) {
throw new TypeError("Cannot instantiate an arrow function"); 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) { export default function _objectDestructuringEmpty(obj) {
if (obj == null) throw new TypeError("Cannot destructure undefined"); 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) { export default function _objectWithoutPropertiesLoose(source, excluded) {
if (source == null) return {}; 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"; import objectWithoutPropertiesLoose from "objectWithoutPropertiesLoose";
export default function _objectWithoutProperties(source, excluded) { 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) { export default function _assertThisInitialized(self) {
if (self === void 0) { if (self === void 0) {
throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); 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"; import assertThisInitialized from "assertThisInitialized";
export default function _possibleConstructorReturn(self, call) { 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"; import getPrototypeOf from "getPrototypeOf";
export default function _superPropBase(object, property) { 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 getPrototypeOf from "getPrototypeOf";
import superPropBase from "superPropBase"; 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 getPrototypeOf from "getPrototypeOf";
import superPropBase from "superPropBase"; import superPropBase from "superPropBase";
import defineProperty from "defineProperty"; 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) { export default function _taggedTemplateLiteral(strings, raw) {
if (!raw) { raw = strings.slice(0); } if (!raw) { raw = strings.slice(0); }
return Object.freeze(Object.defineProperties(strings, { 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) { export default function _taggedTemplateLiteralLoose(strings, raw) {
if (!raw) { raw = strings.slice(0); } if (!raw) { raw = strings.slice(0); }
strings.raw = raw; 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"; import undef from "temporalUndefined";
export default function _temporalRef(val, name) { 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) { export default function _readOnlyError(name) {
throw new Error("\\"" + name + "\\" is read-only"); 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) { export default function _classNameTDZError(name) {
throw new Error("Class \\"" + name + "\\" cannot be referenced in computed property keys."); 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 {}; export default {};
`; `;
helpers.slicedToArray = () => template.program.ast` helpers.slicedToArray = helper("7.0.0-beta.0")`
import arrayWithHoles from "arrayWithHoles"; import arrayWithHoles from "arrayWithHoles";
import iterableToArrayLimit from "iterableToArrayLimit"; import iterableToArrayLimit from "iterableToArrayLimit";
import nonIterableRest from "nonIterableRest"; 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 arrayWithHoles from "arrayWithHoles";
import iterableToArrayLimitLoose from "iterableToArrayLimitLoose"; import iterableToArrayLimitLoose from "iterableToArrayLimitLoose";
import nonIterableRest from "nonIterableRest"; 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 arrayWithHoles from "arrayWithHoles";
import iterableToArray from "iterableToArray"; import iterableToArray from "iterableToArray";
import nonIterableRest from "nonIterableRest"; 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 arrayWithoutHoles from "arrayWithoutHoles";
import iterableToArray from "iterableToArray"; import iterableToArray from "iterableToArray";
import nonIterableSpread from "nonIterableSpread"; 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) { export default function _arrayWithoutHoles(arr) {
if (Array.isArray(arr)) { if (Array.isArray(arr)) {
for (var i = 0, arr2 = new Array(arr.length); i < arr.length; i++) arr2[i] = arr[i]; 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) { export default function _arrayWithHoles(arr) {
if (Array.isArray(arr)) return 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) { export default function _iterableToArray(iter) {
if ( if (
Symbol.iterator in Object(iter) || 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) { export default function _iterableToArrayLimit(arr, i) {
// this is an expanded form of \`for...of\` that properly supports abrupt completions of // 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 // 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) { export default function _iterableToArrayLimitLoose(arr, i) {
var _arr = []; var _arr = [];
for (var _iterator = arr[Symbol.iterator](), _step; !(_step = _iterator.next()).done;) { 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() { export default function _nonIterableSpread() {
throw new TypeError("Invalid attempt to spread non-iterable instance"); 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() { export default function _nonIterableRest() {
throw new TypeError("Invalid attempt to destructure non-iterable instance"); 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) { export default function _skipFirstGeneratorNext(fn) {
return function () { return function () {
var it = fn.apply(this, arguments); 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) { export default function _toPropertyKey(key) {
if (typeof key === "symbol") { if (typeof key === "symbol") {
return key; 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 * Add a helper that will throw a useful error if the transform fails to detect the class
* property assignment, so users know something failed. * 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){ export default function _initializerWarningHelper(descriptor, context){
throw new Error( throw new Error(
'Decorating class property failed. Please ensure that ' + '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. * 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){ export default function _initializerDefineProperty(target, property, descriptor, context){
if (!descriptor) return; 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 * Add a helper to take an initial descriptor, apply some decorators to it, and optionally
* define the property. * 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){ export default function _applyDecoratedDescriptor(target, property, decorators, descriptor, context){
var desc = {}; var desc = {};
Object['ke' + 'ys'](descriptor).forEach(function(key){ 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; var id = 0;
export default function _classPrivateFieldKey(name) { export default function _classPrivateFieldKey(name) {
return "__private_" + (id++) + "_" + name; return "__private_" + (id++) + "_" + name;
} }
`; `;
helpers.classPrivateFieldLooseBase = () => template.program.ast` helpers.classPrivateFieldLooseBase = helper("7.0.0-beta.0")`
export default function _classPrivateFieldBase(receiver, privateKey) { export default function _classPrivateFieldBase(receiver, privateKey) {
if (!Object.prototype.hasOwnProperty.call(receiver, privateKey)) { if (!Object.prototype.hasOwnProperty.call(receiver, privateKey)) {
throw new TypeError("attempted to use private field on non-instance"); 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) { export default function _classPrivateFieldGet(receiver, privateMap) {
if (!privateMap.has(receiver)) { if (!privateMap.has(receiver)) {
throw new TypeError("attempted to get private field on non-instance"); 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) { export default function _classPrivateFieldSet(receiver, privateMap, value) {
if (!privateMap.has(receiver)) { if (!privateMap.has(receiver)) {
throw new TypeError("attempted to set private field on non-instance"); throw new TypeError("attempted to set private field on non-instance");

19
packages/babel-helpers/src/index.js
View File

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

5
packages/babel-helpers/test/helpers/define-helper.js
View File

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