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4 changes: 2 additions & 2 deletions promise.coffee
Original file line number Diff line number Diff line change
Expand Up @@ -75,7 +75,7 @@ class Resolver
try
if value is @promise
throw new TypeError( 'A Promise cannot be resolved with itself.' )
if ( isObject( value ) or isFunction( value ) ) and isFunction( thenFn = value.then )
if ( isObject( value ) or isFunction( value ) ) and ( isFunction( thenFn = value.then ) or ( value instanceof Deferred and thenFn = value.promise.then ) )
isHandled = false
try
self = @
Expand Down Expand Up @@ -139,4 +139,4 @@ class Deferred

target = exports ? window
target.Deferred = Deferred
target.defer = -> new Deferred()
target.defer = -> new Deferred()
4 changes: 2 additions & 2 deletions promise.js
Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,7 @@
* Copyright (c) 2012-2013 [CodeCatalyst, LLC](http://www.codecatalyst.com/).
* Open source under the [MIT License](http://en.wikipedia.org/wiki/MIT_License).
*/
// Generated by CoffeeScript 1.6.3
// Generated by CoffeeScript 1.7.1
(function() {
var CallbackQueue, Consequence, Deferred, Promise, Resolver, callbackQueue, enqueue, isFunction, isObject, nextTick, target;

Expand Down Expand Up @@ -119,7 +119,7 @@
if (value === this.promise) {
throw new TypeError('A Promise cannot be resolved with itself.');
}
if ((isObject(value) || isFunction(value)) && isFunction(thenFn = value.then)) {
if ((isObject(value) || isFunction(value)) && (isFunction(thenFn = value.then) || (value instanceof Deferred && (thenFn = value.promise.then)))) {
isHandled = false;
try {
self = this;
Expand Down
6 changes: 1 addition & 5 deletions promise.min.js

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