pax_global_header00006660000000000000000000000064130622532700014512gustar00rootroot0000000000000052 comment=0b28a2d969d7b77532bc32b66c34214acf445771 es6-symbol-3.1.1/000077500000000000000000000000001306225327000135145ustar00rootroot00000000000000es6-symbol-3.1.1/.gitignore000066400000000000000000000000631306225327000155030ustar00rootroot00000000000000.DS_Store /node_modules /npm-debug.log /.lintcache es6-symbol-3.1.1/.lint000066400000000000000000000001301306225327000144550ustar00rootroot00000000000000@root module tabs indent 2 maxlen 100 ass nomen plusplus newcap vars predef+ Symbol es6-symbol-3.1.1/.travis.yml000066400000000000000000000003141306225327000156230ustar00rootroot00000000000000sudo: false # http://docs.travis-ci.com/user/workers/container-based-infrastructure/ language: node_js node_js: - 0.12 - v4 - v5 - v6 notifications: email: - medikoo+es6-symbol@medikoo.com es6-symbol-3.1.1/CHANGES000066400000000000000000000035421306225327000145130ustar00rootroot00000000000000v3.1.1 -- 2017.03.15 * Improve documentation * Improve error messages * Update dependencies v3.1.0 -- 2016.06.03 * Fix internals of symbol detection * Ensure Symbol.prototype[Symbol.toPrimitive] in all cases returns primitive value (fixes Node v6 support) * Create native symbols whenver possible v3.0.2 -- 2015.12.12 * Fix definition flow, so uneven state of Symbol implementation doesn't crash initialization of polyfill. See #13 v3.0.1 -- 2015.10.22 * Workaround for IE11 bug (reported in #12) v3.0.0 -- 2015.10.02 * Reuse native symbols (e.g. iterator, toStringTag etc.) in a polyfill if they're available Otherwise polyfill symbols may not be recognized by other functions * Improve documentation v2.0.1 -- 2015.01.28 * Fix Symbol.prototype[Symbol.isPrimitive] implementation * Improve validation within Symbol.prototype.toString and Symbol.prototype.valueOf v2.0.0 -- 2015.01.28 * Update up to changes in specification: * Implement `for` and `keyFor` * Remove `Symbol.create` and `Symbol.isRegExp` * Add `Symbol.match`, `Symbol.replace`, `Symbol.search`, `Symbol.species` and `Symbol.split` * Rename `validSymbol` to `validateSymbol` * Improve documentation * Remove dead test modules v1.0.0 -- 2015.01.26 * Fix enumerability for symbol properties set normally (e.g. obj[symbol] = value) * Introduce initialization via hidden constructor * Fix isSymbol handling of polyfill values when native Symbol is present * Fix spelling of LICENSE * Configure lint scripts v0.1.1 -- 2014.10.07 * Fix isImplemented, so it returns true in case of polyfill * Improve documentations v0.1.0 -- 2014.04.28 * Assure strictly npm dependencies * Update to use latest versions of dependencies * Fix implementation detection so it doesn't crash on `String(symbol)` * throw on `new Symbol()` (as decided by TC39) v0.0.0 -- 2013.11.15 * Initial (dev) versiones6-symbol-3.1.1/LICENSE000066400000000000000000000020701306225327000145200ustar00rootroot00000000000000Copyright (C) 2013-2015 Mariusz Nowak (www.medikoo.com) Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. es6-symbol-3.1.1/README.md000066400000000000000000000041211306225327000147710ustar00rootroot00000000000000# es6-symbol ## ECMAScript 6 Symbol polyfill For more information about symbols see following links - [Symbols in ECMAScript 6 by Axel Rauschmayer](http://www.2ality.com/2014/12/es6-symbols.html) - [MDN Documentation](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Symbol) - [Specification](http://people.mozilla.org/~jorendorff/es6-draft.html#sec-symbol-constructor) ### Limitations Underneath it uses real string property names which can easily be retrieved, however accidental collision with other property names is unlikely. ### Usage If you'd like to use native version when it exists and fallback to [ponyfill](https://ponyfill.com) if it doesn't, use *es6-symbol* as following: ```javascript var Symbol = require('es6-symbol'); ``` If you want to make sure your environment implements `Symbol` globally, do: ```javascript require('es6-symbol/implement'); ``` If you strictly want to use polyfill even if native `Symbol` exists (hard to find a good reason for that), do: ```javascript var Symbol = require('es6-symbol/polyfill'); ``` #### API Best is to refer to [specification](http://people.mozilla.org/~jorendorff/es6-draft.html#sec-symbol-objects). Still if you want quick look, follow examples: ```javascript var Symbol = require('es6-symbol'); var symbol = Symbol('My custom symbol'); var x = {}; x[symbol] = 'foo'; console.log(x[symbol]); 'foo' // Detect iterable: var iterator, result; if (possiblyIterable[Symbol.iterator]) { iterator = possiblyIterable[Symbol.iterator](); result = iterator.next(); while(!result.done) { console.log(result.value); result = iterator.next(); } } ``` ### Installation #### NPM In your project path: $ npm install es6-symbol ##### Browser To port it to Browser or any other (non CJS) environment, use your favorite CJS bundler. No favorite yet? Try: [Browserify](http://browserify.org/), [Webmake](https://github.com/medikoo/modules-webmake) or [Webpack](http://webpack.github.io/) ## Tests [![Build Status](https://travis-ci.org/medikoo/es6-symbol.png)](https://travis-ci.org/medikoo/es6-symbol) $ npm test es6-symbol-3.1.1/implement.js000066400000000000000000000003221306225327000160410ustar00rootroot00000000000000'use strict'; if (!require('./is-implemented')()) { Object.defineProperty(require('es5-ext/global'), 'Symbol', { value: require('./polyfill'), configurable: true, enumerable: false, writable: true }); } es6-symbol-3.1.1/index.js000066400000000000000000000001401306225327000151540ustar00rootroot00000000000000'use strict'; module.exports = require('./is-implemented')() ? Symbol : require('./polyfill'); es6-symbol-3.1.1/is-implemented.js000066400000000000000000000007321306225327000167700ustar00rootroot00000000000000'use strict'; var validTypes = { object: true, symbol: true }; module.exports = function () { var symbol; if (typeof Symbol !== 'function') return false; symbol = Symbol('test symbol'); try { String(symbol); } catch (e) { return false; } // Return 'true' also for polyfills if (!validTypes[typeof Symbol.iterator]) return false; if (!validTypes[typeof Symbol.toPrimitive]) return false; if (!validTypes[typeof Symbol.toStringTag]) return false; return true; }; es6-symbol-3.1.1/is-native-implemented.js000066400000000000000000000002461306225327000202540ustar00rootroot00000000000000// Exports true if environment provides native `Symbol` implementation 'use strict'; module.exports = typeof Symbol === 'function' && typeof Symbol() === 'symbol'; es6-symbol-3.1.1/is-symbol.js000066400000000000000000000003761306225327000157760ustar00rootroot00000000000000'use strict'; module.exports = function (x) { if (!x) return false; if (typeof x === 'symbol') return true; if (!x.constructor) return false; if (x.constructor.name !== 'Symbol') return false; return (x[x.constructor.toStringTag] === 'Symbol'); }; es6-symbol-3.1.1/package.json000066400000000000000000000016161306225327000160060ustar00rootroot00000000000000{ "name": "es6-symbol", "version": "3.1.1", "description": "ECMAScript 6 Symbol polyfill", "author": "Mariusz Nowak (http://www.medikoo.com/)", "keywords": [ "symbol", "private", "property", "es6", "ecmascript", "harmony", "ponyfill", "polyfill" ], "repository": { "type": "git", "url": "git://github.com/medikoo/es6-symbol.git" }, "dependencies": { "d": "1", "es5-ext": "~0.10.14" }, "devDependencies": { "tad": "~0.2.7", "xlint": "~0.2.2", "xlint-jslint-medikoo": "~0.1.4" }, "scripts": { "lint": "node node_modules/xlint/bin/xlint --linter=node_modules/xlint-jslint-medikoo/index.js --no-cache --no-stream", "lint-console": "node node_modules/xlint/bin/xlint --linter=node_modules/xlint-jslint-medikoo/index.js --watch", "test": "node ./node_modules/tad/bin/tad" }, "license": "MIT" } es6-symbol-3.1.1/polyfill.js000066400000000000000000000117421306225327000157110ustar00rootroot00000000000000// ES2015 Symbol polyfill for environments that do not (or partially) support it 'use strict'; var d = require('d') , validateSymbol = require('./validate-symbol') , create = Object.create, defineProperties = Object.defineProperties , defineProperty = Object.defineProperty, objPrototype = Object.prototype , NativeSymbol, SymbolPolyfill, HiddenSymbol, globalSymbols = create(null) , isNativeSafe; if (typeof Symbol === 'function') { NativeSymbol = Symbol; try { String(NativeSymbol()); isNativeSafe = true; } catch (ignore) {} } var generateName = (function () { var created = create(null); return function (desc) { var postfix = 0, name, ie11BugWorkaround; while (created[desc + (postfix || '')]) ++postfix; desc += (postfix || ''); created[desc] = true; name = '@@' + desc; defineProperty(objPrototype, name, d.gs(null, function (value) { // For IE11 issue see: // https://connect.microsoft.com/IE/feedbackdetail/view/1928508/ // ie11-broken-getters-on-dom-objects // https://github.com/medikoo/es6-symbol/issues/12 if (ie11BugWorkaround) return; ie11BugWorkaround = true; defineProperty(this, name, d(value)); ie11BugWorkaround = false; })); return name; }; }()); // Internal constructor (not one exposed) for creating Symbol instances. // This one is used to ensure that `someSymbol instanceof Symbol` always return false HiddenSymbol = function Symbol(description) { if (this instanceof HiddenSymbol) throw new TypeError('Symbol is not a constructor'); return SymbolPolyfill(description); }; // Exposed `Symbol` constructor // (returns instances of HiddenSymbol) module.exports = SymbolPolyfill = function Symbol(description) { var symbol; if (this instanceof Symbol) throw new TypeError('Symbol is not a constructor'); if (isNativeSafe) return NativeSymbol(description); symbol = create(HiddenSymbol.prototype); description = (description === undefined ? '' : String(description)); return defineProperties(symbol, { __description__: d('', description), __name__: d('', generateName(description)) }); }; defineProperties(SymbolPolyfill, { for: d(function (key) { if (globalSymbols[key]) return globalSymbols[key]; return (globalSymbols[key] = SymbolPolyfill(String(key))); }), keyFor: d(function (s) { var key; validateSymbol(s); for (key in globalSymbols) if (globalSymbols[key] === s) return key; }), // To ensure proper interoperability with other native functions (e.g. Array.from) // fallback to eventual native implementation of given symbol hasInstance: d('', (NativeSymbol && NativeSymbol.hasInstance) || SymbolPolyfill('hasInstance')), isConcatSpreadable: d('', (NativeSymbol && NativeSymbol.isConcatSpreadable) || SymbolPolyfill('isConcatSpreadable')), iterator: d('', (NativeSymbol && NativeSymbol.iterator) || SymbolPolyfill('iterator')), match: d('', (NativeSymbol && NativeSymbol.match) || SymbolPolyfill('match')), replace: d('', (NativeSymbol && NativeSymbol.replace) || SymbolPolyfill('replace')), search: d('', (NativeSymbol && NativeSymbol.search) || SymbolPolyfill('search')), species: d('', (NativeSymbol && NativeSymbol.species) || SymbolPolyfill('species')), split: d('', (NativeSymbol && NativeSymbol.split) || SymbolPolyfill('split')), toPrimitive: d('', (NativeSymbol && NativeSymbol.toPrimitive) || SymbolPolyfill('toPrimitive')), toStringTag: d('', (NativeSymbol && NativeSymbol.toStringTag) || SymbolPolyfill('toStringTag')), unscopables: d('', (NativeSymbol && NativeSymbol.unscopables) || SymbolPolyfill('unscopables')) }); // Internal tweaks for real symbol producer defineProperties(HiddenSymbol.prototype, { constructor: d(SymbolPolyfill), toString: d('', function () { return this.__name__; }) }); // Proper implementation of methods exposed on Symbol.prototype // They won't be accessible on produced symbol instances as they derive from HiddenSymbol.prototype defineProperties(SymbolPolyfill.prototype, { toString: d(function () { return 'Symbol (' + validateSymbol(this).__description__ + ')'; }), valueOf: d(function () { return validateSymbol(this); }) }); defineProperty(SymbolPolyfill.prototype, SymbolPolyfill.toPrimitive, d('', function () { var symbol = validateSymbol(this); if (typeof symbol === 'symbol') return symbol; return symbol.toString(); })); defineProperty(SymbolPolyfill.prototype, SymbolPolyfill.toStringTag, d('c', 'Symbol')); // Proper implementaton of toPrimitive and toStringTag for returned symbol instances defineProperty(HiddenSymbol.prototype, SymbolPolyfill.toStringTag, d('c', SymbolPolyfill.prototype[SymbolPolyfill.toStringTag])); // Note: It's important to define `toPrimitive` as last one, as some implementations // implement `toPrimitive` natively without implementing `toStringTag` (or other specified symbols) // And that may invoke error in definition flow: // See: https://github.com/medikoo/es6-symbol/issues/13#issuecomment-164146149 defineProperty(HiddenSymbol.prototype, SymbolPolyfill.toPrimitive, d('c', SymbolPolyfill.prototype[SymbolPolyfill.toPrimitive])); es6-symbol-3.1.1/test/000077500000000000000000000000001306225327000144735ustar00rootroot00000000000000es6-symbol-3.1.1/test/implement.js000066400000000000000000000001231306225327000170170ustar00rootroot00000000000000'use strict'; module.exports = function (t, a) { a(typeof Symbol, 'function'); }; es6-symbol-3.1.1/test/index.js000066400000000000000000000003731306225327000161430ustar00rootroot00000000000000'use strict'; var d = require('d') , defineProperty = Object.defineProperty; module.exports = function (T, a) { var symbol = T('test'), x = {}; defineProperty(x, symbol, d('foo')); a(x.test, undefined, "Name"); a(x[symbol], 'foo', "Get"); }; es6-symbol-3.1.1/test/is-implemented.js000066400000000000000000000004741306225327000177520ustar00rootroot00000000000000'use strict'; var global = require('es5-ext/global') , polyfill = require('../polyfill'); module.exports = function (t, a) { var cache; a(typeof t(), 'boolean'); cache = global.Symbol; global.Symbol = polyfill; a(t(), true); if (cache === undefined) delete global.Symbol; else global.Symbol = cache; }; es6-symbol-3.1.1/test/is-native-implemented.js000066400000000000000000000001151306225327000212260ustar00rootroot00000000000000'use strict'; module.exports = function (t, a) { a(typeof t, 'boolean'); }; es6-symbol-3.1.1/test/is-symbol.js000066400000000000000000000006121306225327000167460ustar00rootroot00000000000000'use strict'; var SymbolPoly = require('../polyfill'); module.exports = function (t, a) { a(t(undefined), false, "Undefined"); a(t(null), false, "Null"); a(t(true), false, "Primitive"); a(t('raz'), false, "String"); a(t({}), false, "Object"); a(t([]), false, "Array"); if (typeof Symbol !== 'undefined') { a(t(Symbol()), true, "Native"); } a(t(SymbolPoly()), true, "Polyfill"); }; es6-symbol-3.1.1/test/polyfill.js000066400000000000000000000014001306225327000166560ustar00rootroot00000000000000'use strict'; var d = require('d') , isSymbol = require('../is-symbol') , defineProperty = Object.defineProperty; module.exports = function (T, a) { var symbol = T('test'), x = {}; defineProperty(x, symbol, d('foo')); a(x.test, undefined, "Name"); a(x[symbol], 'foo', "Get"); a(x instanceof T, false); a(isSymbol(symbol), true, "Symbol"); a(isSymbol(T.iterator), true, "iterator"); a(isSymbol(T.toStringTag), true, "toStringTag"); x = {}; x[symbol] = 'foo'; if (typeof symbol !== 'symbol') { a.deep(Object.getOwnPropertyDescriptor(x, symbol), { configurable: true, enumerable: false, value: 'foo', writable: true }); } symbol = T.for('marko'); a(isSymbol(symbol), true); a(T.for('marko'), symbol); a(T.keyFor(symbol), 'marko'); }; es6-symbol-3.1.1/test/validate-symbol.js000066400000000000000000000011501306225327000201220ustar00rootroot00000000000000'use strict'; var SymbolPoly = require('../polyfill'); module.exports = function (t, a) { var symbol; a.throws(function () { t(undefined); }, TypeError, "Undefined"); a.throws(function () { t(null); }, TypeError, "Null"); a.throws(function () { t(true); }, TypeError, "Primitive"); a.throws(function () { t('raz'); }, TypeError, "String"); a.throws(function () { t({}); }, TypeError, "Object"); a.throws(function () { t([]); }, TypeError, "Array"); if (typeof Symbol !== 'undefined') { symbol = Symbol(); a(t(symbol), symbol, "Native"); } symbol = SymbolPoly(); a(t(symbol), symbol, "Polyfill"); }; es6-symbol-3.1.1/validate-symbol.js000066400000000000000000000002651306225327000171510ustar00rootroot00000000000000'use strict'; var isSymbol = require('./is-symbol'); module.exports = function (value) { if (!isSymbol(value)) throw new TypeError(value + " is not a symbol"); return value; };