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66 lines
2.2 KiB
66 lines
2.2 KiB
'use strict'; |
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var setPrototypeOf = require('es5-ext/object/set-prototype-of') |
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, object = require('es5-ext/object/valid-object') |
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, value = require('es5-ext/object/valid-value') |
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, randomUniq = require('es5-ext/string/random-uniq') |
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, d = require('d') |
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, getIterator = require('es6-iterator/get') |
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, forOf = require('es6-iterator/for-of') |
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, toStringTagSymbol = require('es6-symbol').toStringTag |
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, isNative = require('./is-native-implemented') |
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, isArray = Array.isArray, defineProperty = Object.defineProperty |
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, hasOwnProperty = Object.prototype.hasOwnProperty, getPrototypeOf = Object.getPrototypeOf |
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, WeakMapPoly; |
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module.exports = WeakMapPoly = function (/*iterable*/) { |
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var iterable = arguments[0], self; |
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if (!(this instanceof WeakMapPoly)) throw new TypeError('Constructor requires \'new\''); |
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if (isNative && setPrototypeOf && (WeakMap !== WeakMapPoly)) { |
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self = setPrototypeOf(new WeakMap(), getPrototypeOf(this)); |
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} else { |
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self = this; |
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} |
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if (iterable != null) { |
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if (!isArray(iterable)) iterable = getIterator(iterable); |
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} |
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defineProperty(self, '__weakMapData__', d('c', '$weakMap$' + randomUniq())); |
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if (!iterable) return self; |
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forOf(iterable, function (val) { |
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value(val); |
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self.set(val[0], val[1]); |
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}); |
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return self; |
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}; |
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if (isNative) { |
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if (setPrototypeOf) setPrototypeOf(WeakMapPoly, WeakMap); |
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WeakMapPoly.prototype = Object.create(WeakMap.prototype, { |
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constructor: d(WeakMapPoly) |
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}); |
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} |
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Object.defineProperties(WeakMapPoly.prototype, { |
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delete: d(function (key) { |
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if (hasOwnProperty.call(object(key), this.__weakMapData__)) { |
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delete key[this.__weakMapData__]; |
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return true; |
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} |
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return false; |
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}), |
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get: d(function (key) { |
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if (hasOwnProperty.call(object(key), this.__weakMapData__)) { |
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return key[this.__weakMapData__]; |
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} |
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}), |
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has: d(function (key) { |
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return hasOwnProperty.call(object(key), this.__weakMapData__); |
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}), |
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set: d(function (key, value) { |
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defineProperty(object(key), this.__weakMapData__, d('c', value)); |
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return this; |
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}), |
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toString: d(function () { return '[object WeakMap]'; }) |
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}); |
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defineProperty(WeakMapPoly.prototype, toStringTagSymbol, d('c', 'WeakMap'));
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