'use strict';
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var global = require('./_global');
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var $export = require('./_export');
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var meta = require('./_meta');
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var fails = require('./_fails');
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var hide = require('./_hide');
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var redefineAll = require('./_redefine-all');
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var forOf = require('./_for-of');
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var anInstance = require('./_an-instance');
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var isObject = require('./_is-object');
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var setToStringTag = require('./_set-to-string-tag');
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var dP = require('./_object-dp').f;
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var each = require('./_array-methods')(0);
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var DESCRIPTORS = require('./_descriptors');
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module.exports = function (NAME, wrapper, methods, common, IS_MAP, IS_WEAK) {
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var Base = global[NAME];
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var C = Base;
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var ADDER = IS_MAP ? 'set' : 'add';
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var proto = C && C.prototype;
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var O = {};
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if (!DESCRIPTORS || typeof C != 'function' || !(IS_WEAK || proto.forEach && !fails(function () {
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new C().entries().next();
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}))) {
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// create collection constructor
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C = common.getConstructor(wrapper, NAME, IS_MAP, ADDER);
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redefineAll(C.prototype, methods);
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meta.NEED = true;
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} else {
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C = wrapper(function (target, iterable) {
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anInstance(target, C, NAME, '_c');
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target._c = new Base();
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if (iterable != undefined) forOf(iterable, IS_MAP, target[ADDER], target);
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});
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each('add,clear,delete,forEach,get,has,set,keys,values,entries,toJSON'.split(','), function (KEY) {
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var IS_ADDER = KEY == 'add' || KEY == 'set';
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if (KEY in proto && !(IS_WEAK && KEY == 'clear')) hide(C.prototype, KEY, function (a, b) {
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anInstance(this, C, KEY);
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if (!IS_ADDER && IS_WEAK && !isObject(a)) return KEY == 'get' ? undefined : false;
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var result = this._c[KEY](a === 0 ? 0 : a, b);
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return IS_ADDER ? this : result;
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});
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});
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IS_WEAK || dP(C.prototype, 'size', {
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get: function () {
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return this._c.size;
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}
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});
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}
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setToStringTag(C, NAME);
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O[NAME] = C;
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$export($export.G + $export.W + $export.F, O);
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if (!IS_WEAK) common.setStrong(C, NAME, IS_MAP);
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return C;
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};
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