58 lines
2.1 KiB
JavaScript
58 lines
2.1 KiB
JavaScript
'use strict';
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var $ = require('../internals/export');
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var aCallable = require('../internals/a-callable');
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var anObject = require('../internals/an-object');
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var call = require('../internals/function-call');
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var createProperty = require('../internals/create-property');
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var getBuiltIn = require('../internals/get-built-in');
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var getOwnPropertyDescriptor = require('../internals/object-get-own-property-descriptor');
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var newPromiseCapabilityModule = require('../internals/new-promise-capability');
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var perform = require('../internals/perform');
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var create = getBuiltIn('Object', 'create');
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var ownKeys = getBuiltIn('Reflect', 'ownKeys');
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// `Promise.allKeyed` method
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// https://github.com/tc39/proposal-await-dictionary
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$({ target: 'Promise', stat: true }, {
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allKeyed: function allKeyed(promises) {
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var C = this;
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var capability = newPromiseCapabilityModule.f(C);
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var resolve = capability.resolve;
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var reject = capability.reject;
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var result = perform(function () {
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var promiseResolve = aCallable(C.resolve);
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var allKeys = ownKeys(anObject(promises));
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var keys = [];
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var values = [];
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var remaining = 1;
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var counter = 0;
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for (var i = 0; i < allKeys.length; i++) (function (key) {
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var desc = getOwnPropertyDescriptor.f(promises, key);
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if (desc && desc.enumerable) {
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var index = counter;
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var alreadyCalled = false;
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remaining++;
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keys[index] = key;
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values[index] = undefined;
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call(promiseResolve, C, promises[key]).then(function (value) {
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if (alreadyCalled) return;
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alreadyCalled = true;
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values[index] = value;
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--remaining;
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if (remaining === 0) {
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var res = create(null);
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for (var j = 0; j < keys.length; j++) createProperty(res, keys[j], values[j]);
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resolve(res);
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}
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}, reject);
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counter++;
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}
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})(allKeys[i]);
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--remaining || resolve(create(null));
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});
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if (result.error) reject(result.value);
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return capability.promise;
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}
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});
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