will/lib/promise.js

Flexible futures

// Generated by CoffeeScript 1.6.3
(function() {
  var Future, Promise,
    __hasProp = {}.hasOwnProperty,
    __extends = function(child, parent) { for (var key in parent) { if (__hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor(); child.__super__ = parent.prototype; return child; };

  Future = require('./future');

  module.exports = Promise = (function(_super) {
    var allowed, name;

    __extends(Promise, _super);

    allowed = {
      getStateName: true,
      once: true
    };

    function Promise(deferral) {
      this._apply = function(method, args) {
        var result;
        if (!allowed[method]) {
          return;
        }
        result = deferral[method].apply(deferral, args);
        if (result === deferral) {
          result = this;
        }
        return result;
      };
    }

    Promise.prototype.promise = function() {
      return this;
    };

    for (name in allowed) {
      Promise.prototype[name] = (function(name) {
        return function() {
          return this._apply(name, arguments);
        };
      })(name);
    }

    return Promise;

  })(Future);

}).call(this);