bluebird/js/zalgo/call_get.js

Full featured Promises/A+ implementation with exceptionally good performance

/**
 * Copyright (c) 2013 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 ) {
    Promise.prototype.call = function Promise$call( propertyName ) {
        var len = arguments.length;

        var args = new Array(len-1);
        for( var i = 1; i < len; ++i ) {
            args[ i - 1 ] = arguments[ i ];
        }

        return this._then( function( obj ) {
                return obj[ propertyName ].apply( obj, args );
            },
            void 0,
            void 0,
            void 0,
            void 0,
            this.call
        );
    };

    function Promise$getter( obj ) {
        var prop = typeof this === "string"
            ? this
            : ("" + this);
        return obj[ prop ];
    }
    Promise.prototype.get = function Promise$get( propertyName ) {
        return this._then(
            Promise$getter,
            void 0,
            void 0,
            propertyName,
            void 0,
            this.get
        );
    };
};