node_modules/bluebird/js/zalgo/race.js

/**
 * Copyright (c) 2014 Petka Antonov
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:</p>
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 * 
 */
"use strict";
module.exports = function(Promise, INTERNAL) {
    var apiRejection = require("./errors_api_rejection.js")(Promise);
    var isArray = require("./util.js").isArray;

    var raceLater = function Promise$_raceLater(promise) {
        return promise.then(function Promise$_lateRacer(array) {
            return Promise$_Race(array, Promise$_lateRacer, promise);
        });
    };

    var hasOwn = {}.hasOwnProperty;
    function Promise$_Race(promises, caller, parent) {
        var maybePromise = Promise._cast(promises, caller, void 0);

        if (Promise.is(maybePromise)) {
            return raceLater(maybePromise);
        }
        else if (!isArray(promises)) {
            return apiRejection("expecting an array, a promise or a thenable");
        }

        var ret = new Promise(INTERNAL);
        ret._setTrace(caller, parent);
        if (parent !== void 0) {
            if (parent._isBound()) {
                ret._setBoundTo(parent._boundTo);
            }
            if (parent._cancellable()) {
                ret._setCancellable();
                ret._cancellationParent = parent;
            }
        }
        var fulfill = ret._fulfill;
        var reject = ret._reject;
        for (var i = 0, len = promises.length; i < len; ++i) {
            var val = promises[i];

            if (val === void 0 && !(hasOwn.call(promises, i))) {
                continue;
            }

            Promise.cast(val)._then(
                fulfill,
                reject,
                void 0,
                ret,
                null,
                caller
           );
        }
        return ret;
    }

    Promise.race = function Promise$Race(promises) {
        return Promise$_Race(promises, Promise.race, void 0);
    };

    Promise.prototype.race = function Promise$race() {
        return Promise$_Race(this, this.race, void 0);
    };

};