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105 lines
4.4 KiB
105 lines
4.4 KiB
'use strict';
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var $ = require('../internals/export');
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var global = require('../internals/global');
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var uncurryThis = require('../internals/function-uncurry-this');
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var isForced = require('../internals/is-forced');
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var redefine = require('../internals/redefine');
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var InternalMetadataModule = require('../internals/internal-metadata');
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var iterate = require('../internals/iterate');
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var anInstance = require('../internals/an-instance');
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var isCallable = require('../internals/is-callable');
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var isObject = require('../internals/is-object');
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var fails = require('../internals/fails');
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var checkCorrectnessOfIteration = require('../internals/check-correctness-of-iteration');
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var setToStringTag = require('../internals/set-to-string-tag');
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var inheritIfRequired = require('../internals/inherit-if-required');
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module.exports = function (CONSTRUCTOR_NAME, wrapper, common) {
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var IS_MAP = CONSTRUCTOR_NAME.indexOf('Map') !== -1;
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var IS_WEAK = CONSTRUCTOR_NAME.indexOf('Weak') !== -1;
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var ADDER = IS_MAP ? 'set' : 'add';
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var NativeConstructor = global[CONSTRUCTOR_NAME];
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var NativePrototype = NativeConstructor && NativeConstructor.prototype;
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var Constructor = NativeConstructor;
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var exported = {};
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var fixMethod = function (KEY) {
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var uncurriedNativeMethod = uncurryThis(NativePrototype[KEY]);
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redefine(NativePrototype, KEY,
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KEY == 'add' ? function add(value) {
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uncurriedNativeMethod(this, value === 0 ? 0 : value);
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return this;
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} : KEY == 'delete' ? function (key) {
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return IS_WEAK && !isObject(key) ? false : uncurriedNativeMethod(this, key === 0 ? 0 : key);
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} : KEY == 'get' ? function get(key) {
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return IS_WEAK && !isObject(key) ? undefined : uncurriedNativeMethod(this, key === 0 ? 0 : key);
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} : KEY == 'has' ? function has(key) {
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return IS_WEAK && !isObject(key) ? false : uncurriedNativeMethod(this, key === 0 ? 0 : key);
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} : function set(key, value) {
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uncurriedNativeMethod(this, key === 0 ? 0 : key, value);
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return this;
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}
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);
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};
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var REPLACE = isForced(
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CONSTRUCTOR_NAME,
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!isCallable(NativeConstructor) || !(IS_WEAK || NativePrototype.forEach && !fails(function () {
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new NativeConstructor().entries().next();
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}))
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);
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if (REPLACE) {
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// create collection constructor
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Constructor = common.getConstructor(wrapper, CONSTRUCTOR_NAME, IS_MAP, ADDER);
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InternalMetadataModule.enable();
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} else if (isForced(CONSTRUCTOR_NAME, true)) {
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var instance = new Constructor();
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// early implementations not supports chaining
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var HASNT_CHAINING = instance[ADDER](IS_WEAK ? {} : -0, 1) != instance;
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// V8 ~ Chromium 40- weak-collections throws on primitives, but should return false
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var THROWS_ON_PRIMITIVES = fails(function () { instance.has(1); });
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// most early implementations doesn't supports iterables, most modern - not close it correctly
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// eslint-disable-next-line no-new -- required for testing
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var ACCEPT_ITERABLES = checkCorrectnessOfIteration(function (iterable) { new NativeConstructor(iterable); });
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// for early implementations -0 and +0 not the same
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var BUGGY_ZERO = !IS_WEAK && fails(function () {
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// V8 ~ Chromium 42- fails only with 5+ elements
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var $instance = new NativeConstructor();
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var index = 5;
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while (index--) $instance[ADDER](index, index);
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return !$instance.has(-0);
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});
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if (!ACCEPT_ITERABLES) {
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Constructor = wrapper(function (dummy, iterable) {
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anInstance(dummy, NativePrototype);
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var that = inheritIfRequired(new NativeConstructor(), dummy, Constructor);
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if (iterable != undefined) iterate(iterable, that[ADDER], { that: that, AS_ENTRIES: IS_MAP });
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return that;
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});
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Constructor.prototype = NativePrototype;
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NativePrototype.constructor = Constructor;
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}
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if (THROWS_ON_PRIMITIVES || BUGGY_ZERO) {
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fixMethod('delete');
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fixMethod('has');
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IS_MAP && fixMethod('get');
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}
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if (BUGGY_ZERO || HASNT_CHAINING) fixMethod(ADDER);
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// weak collections should not contains .clear method
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if (IS_WEAK && NativePrototype.clear) delete NativePrototype.clear;
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}
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exported[CONSTRUCTOR_NAME] = Constructor;
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$({ global: true, forced: Constructor != NativeConstructor }, exported);
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setToStringTag(Constructor, CONSTRUCTOR_NAME);
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if (!IS_WEAK) common.setStrong(Constructor, CONSTRUCTOR_NAME, IS_MAP);
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return Constructor;
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};
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