Use typedefs in lib.

sdk/lib/async/stream.dart

 // Copyright (c) 2013, 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;
 
 // -------------------------------------------------------------------
 // Core Stream types
 // -------------------------------------------------------------------
 
@@ skipping 259 matching lines @@
 
   /**
    * Reduces a sequence of values by repeatedly applying [combine].
    */
   Future<T> reduce(T combine(T previous, T element)) {
     _FutureImpl<T> result = new _FutureImpl<T>();
     bool seenFirst = false;
     T value;
     StreamSubscription subscription;
     subscription = this.listen(
-      // TODO(ahe): Restore type when feature is implemented in dart2js
-      // checked mode. http://dartbug.com/7733
-      (/* T */ element) {
+      (T element) {
         if (seenFirst) {
           _runUserCode(() => combine(value, element),
                        (T newValue) { value = newValue; },
                        _cancelAndError(subscription, result));
         } else {
           value = element;
           seenFirst = true;
         }
       },
       onError: result._setError,
       onDone: () {
         if (!seenFirst) {
           result._setError(new StateError("No elements"));
         } else {
           result._setValue(value);
         }
       },
       cancelOnError: true
     );
     return result;
   }
 
   /** Reduces a sequence of values by repeatedly applying [combine]. */
   Future fold(var initialValue, combine(var previous, T element)) {
     _FutureImpl result = new _FutureImpl();
     var value = initialValue;
     StreamSubscription subscription;
     subscription = this.listen(
-      // TODO(ahe): Restore type when feature is implemented in dart2js
-      // checked mode. http://dartbug.com/7733
-      (/*T*/ element) {
+      (T element) {
         _runUserCode(
           () => combine(value, element),
           (newValue) { value = newValue; },
           _cancelAndError(subscription, result)
         );
       },
       onError: (e) {
         result._setError(e);
       },
       onDone: () {
         result._setValue(value);
       },
       cancelOnError: true);
     return result;
   }
 
   /**
    * Checks whether [needle] occurs in the elements provided by this stream.
    *
    * Completes the [Future] when the answer is known.
    * If this stream reports an error, the [Future] will report that error.
    */
   Future<bool> contains(Object needle) {
     _FutureImpl<bool> future = new _FutureImpl<bool>();
     StreamSubscription subscription;
     subscription = this.listen(
-        // TODO(ahe): Restore type when feature is implemented in dart2js
-        // checked mode. http://dartbug.com/7733
-        (/*T*/ element) {
+        (T element) {
           _runUserCode(
             () => (element == needle),
             (bool isMatch) {
               if (isMatch) {
                 subscription.cancel();
                 future._setValue(true);
               }
             },
             _cancelAndError(subscription, future)
           );
@@ skipping 10 matching lines @@
    * Executes [action] on each data event of the stream.
    *
    * Completes the returned [Future] when all events of the stream
    * have been processed. Completes the future with an error if the
    * stream has an error event, or if [action] throws.
    */
   Future forEach(void action(T element)) {
     _FutureImpl future = new _FutureImpl();
     StreamSubscription subscription;
     subscription = this.listen(
-        // TODO(ahe): Restore type when feature is implemented in dart2js
-        // checked mode. http://dartbug.com/7733
-        (/*T*/ element) {
+        (T element) {
           _runUserCode(
             () => action(element),
             (_) {},
             _cancelAndError(subscription, future)
           );
         },
         onError: future._setError,
         onDone: () {
           future._setValue(null);
         },
         cancelOnError: true);
     return future;
   }
 
   /**
    * Checks whether [test] accepts all elements provided by this stream.
    *
    * Completes the [Future] when the answer is known.
    * If this stream reports an error, the [Future] will report that error.
    */
   Future<bool> every(bool test(T element)) {
     _FutureImpl<bool> future = new _FutureImpl<bool>();
     StreamSubscription subscription;
     subscription = this.listen(
-        // TODO(ahe): Restore type when feature is implemented in dart2js
-        // checked mode. http://dartbug.com/7733
-        (/*T*/ element) {
+        (T element) {
           _runUserCode(
             () => test(element),
             (bool isMatch) {
               if (!isMatch) {
                 subscription.cancel();
                 future._setValue(false);
               }
             },
             _cancelAndError(subscription, future)
           );
         },
         onError: future._setError,
         onDone: () {
           future._setValue(true);
         },
         cancelOnError: true);
     return future;
   }
 
   /**
    * Checks whether [test] accepts any element provided by this stream.
    *
    * Completes the [Future] when the answer is known.
    * If this stream reports an error, the [Future] will report that error.
    */
   Future<bool> any(bool test(T element)) {
     _FutureImpl<bool> future = new _FutureImpl<bool>();
     StreamSubscription subscription;
     subscription = this.listen(
-        // TODO(ahe): Restore type when feature is implemented in dart2js
-        // checked mode. http://dartbug.com/7733
-        (/*T*/ element) {
+        (T element) {
           _runUserCode(
             () => test(element),
             (bool isMatch) {
               if (isMatch) {
                 subscription.cancel();
                 future._setValue(true);
               }
             },
             _cancelAndError(subscription, future)
           );
@@ skipping 36 matching lines @@
       },
       cancelOnError: true);
     return future;
   }
 
   /** Collects the data of this stream in a [List]. */
   Future<List<T>> toList() {
     List<T> result = <T>[];
     _FutureImpl<List<T>> future = new _FutureImpl<List<T>>();
     this.listen(
-      // TODO(ahe): Restore type when feature is implemented in dart2js
-      // checked mode. http://dartbug.com/7733
-      (/*T*/ data) {
+      (T data) {
         result.add(data);
       },
       onError: future._setError,
       onDone: () {
         future._setValue(result);
       },
       cancelOnError: true);
     return future;
   }
 
   /** Collects the data of this stream in a [Set]. */
   Future<Set<T>> toSet() {
     Set<T> result = new Set<T>();
     _FutureImpl<Set<T>> future = new _FutureImpl<Set<T>>();
     this.listen(
-      // TODO(ahe): Restore type when feature is implemented in dart2js
-      // checked mode. http://dartbug.com/7733
-      (/*T*/ data) {
+      (T data) {
         result.add(data);
       },
       onError: future._setError,
       onDone: () {
         future._setValue(result);
       },
       cancelOnError: true);
     return future;
   }
 
@@ skipping 71 matching lines @@
   /**
    * Returns the first element.
    *
    * If [this] is empty throws a [StateError]. Otherwise this method is
    * equivalent to [:this.elementAt(0):]
    */
   Future<T> get first {
     _FutureImpl<T> future = new _FutureImpl<T>();
     StreamSubscription subscription;
     subscription = this.listen(
-      // TODO(ahe): Restore type when feature is implemented in dart2js
-      // checked mode. http://dartbug.com/7733
-      (/*T*/ value) {
+      (T value) {
         subscription.cancel();
         future._setValue(value);
         return;
       },
       onError: future._setError,
       onDone: () {
         future._setError(new StateError("No elements"));
       },
       cancelOnError: true);
     return future;
   }
 
   /**
    * Returns the last element.
    *
    * If [this] is empty throws a [StateError].
    */
   Future<T> get last {
     _FutureImpl<T> future = new _FutureImpl<T>();
     T result = null;
     bool foundResult = false;
     StreamSubscription subscription;
     subscription = this.listen(
-      // TODO(ahe): Restore type when feature is implemented in dart2js
-      // checked mode. http://dartbug.com/7733
-      (/*T*/ value) {
+      (T value) {
         foundResult = true;
         result = value;
       },
       onError: future._setError,
       onDone: () {
         if (foundResult) {
           future._setValue(result);
           return;
         }
         future._setError(new StateError("No elements"));
       },
       cancelOnError: true);
     return future;
   }
 
   /**
    * Returns the single element.
    *
    * If [this] is empty or has more than one element throws a [StateError].
    */
   Future<T> get single {
     _FutureImpl<T> future = new _FutureImpl<T>();
     T result = null;
     bool foundResult = false;
     StreamSubscription subscription;
     subscription = this.listen(
-      // TODO(ahe): Restore type when feature is implemented in dart2js
-      // checked mode. http://dartbug.com/7733
-      (/*T*/ value) {
+      (T value) {
         if (foundResult) {
           subscription.cancel();
           // This is the second element we get.
           Error error = new StateError("More than one element");
           future._setError(error);
           return;
         }
         foundResult = true;
         result = value;
       },
@@ skipping 20 matching lines @@
    * becomes the value of the future.
    *
    * If an error occurs, or if this stream ends without finding a match and
    * with no [defaultValue] function provided, the future will receive an
    * error.
    */
   Future<dynamic> firstWhere(bool test(T element), {Object defaultValue()}) {
     _FutureImpl<dynamic> future = new _FutureImpl();
     StreamSubscription subscription;
     subscription = this.listen(
-      // TODO(ahe): Restore type when feature is implemented in dart2js
-      // checked mode. http://dartbug.com/7733
-      (/*T*/ value) {
+      (T value) {
         _runUserCode(
           () => test(value),
           (bool isMatch) {
             if (isMatch) {
               subscription.cancel();
               future._setValue(value);
             }
           },
           _cancelAndError(subscription, future)
         );
@@ skipping 16 matching lines @@
    * As [firstWhere], except that the last matching element is found.
    * That means that the result cannot be provided before this stream
    * is done.
    */
   Future<dynamic> lastWhere(bool test(T element), {Object defaultValue()}) {
     _FutureImpl<dynamic> future = new _FutureImpl();
     T result = null;
     bool foundResult = false;
     StreamSubscription subscription;
     subscription = this.listen(
-      // TODO(ahe): Restore type when feature is implemented in dart2js
-      // checked mode. http://dartbug.com/7733
-      (/*T*/ value) {
+      (T value) {
         _runUserCode(
           () => true == test(value),
           (bool isMatch) {
             if (isMatch) {
               foundResult = true;
               result = value;
             }
           },
           _cancelAndError(subscription, future)
         );
@@ skipping 19 matching lines @@
    *
    * Like [lastMatch], except that it is an error if more than one
    * matching element occurs in the stream.
    */
   Future<T> singleWhere(bool test(T element)) {
     _FutureImpl<T> future = new _FutureImpl<T>();
     T result = null;
     bool foundResult = false;
     StreamSubscription subscription;
     subscription = this.listen(
-      // TODO(ahe): Restore type when feature is implemented in dart2js
-      // checked mode. http://dartbug.com/7733
-      (/*T*/ value) {
+      (T value) {
         _runUserCode(
           () => true == test(value),
           (bool isMatch) {
             if (isMatch) {
               if (foundResult) {
                 subscription.cancel();
                 future._setError(
                     new StateError('Multiple matches for "single"'));
                 return;
               }
@@ skipping 22 matching lines @@
    * If an error event occurs, the future will end with this error.
    *
    * If this stream provides fewer than [index] elements before closing,
    * an error is reported.
    */
   Future<T> elementAt(int index) {
     if (index is! int || index < 0) throw new ArgumentError(index);
     _FutureImpl<T> future = new _FutureImpl<T>();
     StreamSubscription subscription;
     subscription = this.listen(
-      // TODO(ahe): Restore type when feature is implemented in dart2js
-      // checked mode. http://dartbug.com/7733
-      (/*T*/ value) {
+      (T value) {
         if (index == 0) {
           subscription.cancel();
           future._setValue(value);
           return;
         }
         index -= 1;
       },
       onError: future._setError,
       onDone: () {
         future._setError(new StateError("Not enough elements for elementAt"));
@@ skipping 424 matching lines @@
    *
    * If a [moveNext] call has been made, it will complete with `false` as value,
    * as will all further calls to [moveNext].
    *
    * If you need to stop listening for values before the stream iterator is
    * automatically closed, you must call [cancel] to ensure that the stream
    * is properly closed.
    */
   void cancel();
 }