Handle Future result from Future.sync computation

sdk/lib/async/future.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of dart.async;
 
 /**
  * An object representing a delayed computation.
  *
  * A [Future] is used to obtain a not yet
@@ skipping 120 matching lines @@
       return new Future<T>.value(result);
     } catch (error, stackTrace) {
       return new Future<T>.error(error, stackTrace);
     }
   }
 
   /**
    * A future whose value is available in the next event-loop iteration.
    *
    * If [value] is not a [Future], using this constructor is equivalent
-   * to [:new Future.sync(() => value):].
+   * to [:new Future<T>.sync(() => value):].
    *
    * See [Completer] to create a Future and complete it later.
    */
-  factory Future.value([T value]) {
+  factory Future.value([value]) {
     return new _Future<T>.immediate(value);
   }
 
   /**
    * A future that completes with an error in the next event-loop iteration.
    *
    * See [Completer] to create a Future and complete it later.
    */
   factory Future.error(var error, [Object stackTrace]) {
     return new _Future<T>.immediateError(error, stackTrace);
@@ skipping 202 matching lines @@
    */
   Stream<T> asStream();
 }
 
 /**
  * A way to produce Future objects and to complete them later
  * with a value or error.
  *
  * If you already have a Future, you probably don't need a Completer.
  * Instead, you can usually use [Future.then], which returns a Future:
- * 
+ *
  *     Future doStuff(){
  *       return someAsyncOperation().then((result) {
  *         // Do something.
  *       });
  *     }
  *
  * If you do need to create a Future from scratch—for example,
  * when you're converting a callback-based API into a Future-based
  * one—you can use a Completer as follows:
  *
@@ skipping 86 matching lines @@
    *
    * The argument [exception] must not be `null`.
    */
   void completeError(Object exception, [Object stackTrace]);
 
   /**
    * Whether the future has been completed.
    */
   bool get isCompleted;
 }