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node_modules/core-js/modules/_collection.js
| 85 lines
| 3.2 KiB
| application/javascript
| JavascriptLexer
|
| r789 | 'use strict'; | |||
| var global = require('./_global'); | ||||
| var $export = require('./_export'); | ||||
| var redefine = require('./_redefine'); | ||||
| var redefineAll = require('./_redefine-all'); | ||||
| var meta = require('./_meta'); | ||||
| var forOf = require('./_for-of'); | ||||
| var anInstance = require('./_an-instance'); | ||||
| var isObject = require('./_is-object'); | ||||
| var fails = require('./_fails'); | ||||
| var $iterDetect = require('./_iter-detect'); | ||||
| var setToStringTag = require('./_set-to-string-tag'); | ||||
| var inheritIfRequired = require('./_inherit-if-required'); | ||||
| module.exports = function (NAME, wrapper, methods, common, IS_MAP, IS_WEAK) { | ||||
| var Base = global[NAME]; | ||||
| var C = Base; | ||||
| var ADDER = IS_MAP ? 'set' : 'add'; | ||||
| var proto = C && C.prototype; | ||||
| var O = {}; | ||||
| var fixMethod = function (KEY) { | ||||
| var fn = proto[KEY]; | ||||
| redefine(proto, KEY, | ||||
| KEY == 'delete' ? function (a) { | ||||
| return IS_WEAK && !isObject(a) ? false : fn.call(this, a === 0 ? 0 : a); | ||||
| } : KEY == 'has' ? function has(a) { | ||||
| return IS_WEAK && !isObject(a) ? false : fn.call(this, a === 0 ? 0 : a); | ||||
| } : KEY == 'get' ? function get(a) { | ||||
| return IS_WEAK && !isObject(a) ? undefined : fn.call(this, a === 0 ? 0 : a); | ||||
| } : KEY == 'add' ? function add(a) { fn.call(this, a === 0 ? 0 : a); return this; } | ||||
| : function set(a, b) { fn.call(this, a === 0 ? 0 : a, b); return this; } | ||||
| ); | ||||
| }; | ||||
| if (typeof C != 'function' || !(IS_WEAK || proto.forEach && !fails(function () { | ||||
| new C().entries().next(); | ||||
| }))) { | ||||
| // create collection constructor | ||||
| C = common.getConstructor(wrapper, NAME, IS_MAP, ADDER); | ||||
| redefineAll(C.prototype, methods); | ||||
| meta.NEED = true; | ||||
| } else { | ||||
| var instance = new C(); | ||||
| // early implementations not supports chaining | ||||
| var HASNT_CHAINING = instance[ADDER](IS_WEAK ? {} : -0, 1) != instance; | ||||
| // V8 ~ Chromium 40- weak-collections throws on primitives, but should return false | ||||
| var THROWS_ON_PRIMITIVES = fails(function () { instance.has(1); }); | ||||
| // most early implementations doesn't supports iterables, most modern - not close it correctly | ||||
| var ACCEPT_ITERABLES = $iterDetect(function (iter) { new C(iter); }); // eslint-disable-line no-new | ||||
| // for early implementations -0 and +0 not the same | ||||
| var BUGGY_ZERO = !IS_WEAK && fails(function () { | ||||
| // V8 ~ Chromium 42- fails only with 5+ elements | ||||
| var $instance = new C(); | ||||
| var index = 5; | ||||
| while (index--) $instance[ADDER](index, index); | ||||
| return !$instance.has(-0); | ||||
| }); | ||||
| if (!ACCEPT_ITERABLES) { | ||||
| C = wrapper(function (target, iterable) { | ||||
| anInstance(target, C, NAME); | ||||
| var that = inheritIfRequired(new Base(), target, C); | ||||
| if (iterable != undefined) forOf(iterable, IS_MAP, that[ADDER], that); | ||||
| return that; | ||||
| }); | ||||
| C.prototype = proto; | ||||
| proto.constructor = C; | ||||
| } | ||||
| if (THROWS_ON_PRIMITIVES || BUGGY_ZERO) { | ||||
| fixMethod('delete'); | ||||
| fixMethod('has'); | ||||
| IS_MAP && fixMethod('get'); | ||||
| } | ||||
| if (BUGGY_ZERO || HASNT_CHAINING) fixMethod(ADDER); | ||||
| // weak collections should not contains .clear method | ||||
| if (IS_WEAK && proto.clear) delete proto.clear; | ||||
| } | ||||
| setToStringTag(C, NAME); | ||||
| O[NAME] = C; | ||||
| $export($export.G + $export.W + $export.F * (C != Base), O); | ||||
| if (!IS_WEAK) common.setStrong(C, NAME, IS_MAP); | ||||
| return C; | ||||
| }; | ||||