'use strict'; var $ = require('../internals/export'); var global = require('../internals/global'); var uncurryThis = require('../internals/function-uncurry-this'); var isForced = require('../internals/is-forced'); var redefine = require('../internals/redefine'); var InternalMetadataModule = require('../internals/internal-metadata'); var iterate = require('../internals/iterate'); var anInstance = require('../internals/an-instance'); var isCallable = require('../internals/is-callable'); var isObject = require('../internals/is-object'); var fails = require('../internals/fails'); var checkCorrectnessOfIteration = require('../internals/check-correctness-of-iteration'); var setToStringTag = require('../internals/set-to-string-tag'); var inheritIfRequired = require('../internals/inherit-if-required'); module.exports = function (CONSTRUCTOR_NAME, wrapper, common) { var IS_MAP = CONSTRUCTOR_NAME.indexOf('Map') !== -1; var IS_WEAK = CONSTRUCTOR_NAME.indexOf('Weak') !== -1; var ADDER = IS_MAP ? 'set' : 'add'; var NativeConstructor = global[CONSTRUCTOR_NAME]; var NativePrototype = NativeConstructor && NativeConstructor.prototype; var Constructor = NativeConstructor; var exported = {}; var fixMethod = function (KEY) { var uncurriedNativeMethod = uncurryThis(NativePrototype[KEY]); redefine(NativePrototype, KEY, KEY == 'add' ? function add(value) { uncurriedNativeMethod(this, value === 0 ? 0 : value); return this; } : KEY == 'delete' ? function (key) { return IS_WEAK && !isObject(key) ? false : uncurriedNativeMethod(this, key === 0 ? 0 : key); } : KEY == 'get' ? function get(key) { return IS_WEAK && !isObject(key) ? undefined : uncurriedNativeMethod(this, key === 0 ? 0 : key); } : KEY == 'has' ? function has(key) { return IS_WEAK && !isObject(key) ? false : uncurriedNativeMethod(this, key === 0 ? 0 : key); } : function set(key, value) { uncurriedNativeMethod(this, key === 0 ? 0 : key, value); return this; } ); }; var REPLACE = isForced( CONSTRUCTOR_NAME, !isCallable(NativeConstructor) || !(IS_WEAK || NativePrototype.forEach && !fails(function () { new NativeConstructor().entries().next(); })) ); if (REPLACE) { // create collection constructor Constructor = common.getConstructor(wrapper, CONSTRUCTOR_NAME, IS_MAP, ADDER); InternalMetadataModule.enable(); } else if (isForced(CONSTRUCTOR_NAME, true)) { var instance = new Constructor(); // 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 // eslint-disable-next-line no-new -- required for testing var ACCEPT_ITERABLES = checkCorrectnessOfIteration(function (iterable) { new NativeConstructor(iterable); }); // 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 NativeConstructor(); var index = 5; while (index--) $instance[ADDER](index, index); return !$instance.has(-0); }); if (!ACCEPT_ITERABLES) { Constructor = wrapper(function (dummy, iterable) { anInstance(dummy, NativePrototype); var that = inheritIfRequired(new NativeConstructor(), dummy, Constructor); if (iterable != undefined) iterate(iterable, that[ADDER], { that: that, AS_ENTRIES: IS_MAP }); return that; }); Constructor.prototype = NativePrototype; NativePrototype.constructor = Constructor; } 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 && NativePrototype.clear) delete NativePrototype.clear; } exported[CONSTRUCTOR_NAME] = Constructor; $({ global: true, forced: Constructor != NativeConstructor }, exported); setToStringTag(Constructor, CONSTRUCTOR_NAME); if (!IS_WEAK) common.setStrong(Constructor, CONSTRUCTOR_NAME, IS_MAP); return Constructor; };