mirror of
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49 lines
1.2 KiB
JavaScript
49 lines
1.2 KiB
JavaScript
"use strict";
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module.exports = function(
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Promise, INTERNAL, tryConvertToPromise, apiRejection) {
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var util = require("./util");
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var raceLater = function (promise) {
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return promise.then(function(array) {
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return race(array, promise);
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});
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};
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function race(promises, parent) {
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var maybePromise = tryConvertToPromise(promises);
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if (maybePromise instanceof Promise) {
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return raceLater(maybePromise);
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} else {
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promises = util.asArray(promises);
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if (promises === null)
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return apiRejection("expecting an array or an iterable object but got " + util.classString(promises));
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}
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var ret = new Promise(INTERNAL);
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if (parent !== undefined) {
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ret._propagateFrom(parent, 3);
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}
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var fulfill = ret._fulfill;
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var reject = ret._reject;
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for (var i = 0, len = promises.length; i < len; ++i) {
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var val = promises[i];
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if (val === undefined && !(i in promises)) {
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continue;
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}
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Promise.cast(val)._then(fulfill, reject, undefined, ret, null);
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}
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return ret;
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}
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Promise.race = function (promises) {
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return race(promises, undefined);
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};
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Promise.prototype.race = function () {
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return race(this, undefined);
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};
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};
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