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quiver/lib/src/collection/delegates/queue.dart

-// Copyright 2013 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-part of quiver.collection;
-
-/**
- * An implementation of [Queue] that delegates all methods to another [Queue].
- * For instance you can create a FruitQueue like this :
- *
- *     class FruitQueue extends DelegatingQueue<Fruit> {
- *       final Queue<Fruit> _fruits = new Queue<Fruit>();
- *
- *       Queue<Fruit> get delegate => _fruits;
- *
- *       // custom methods
- *     }
- */
-abstract class DelegatingQueue<E> extends DelegatingIterable<E>
-    implements Queue<E> {
-  Queue<E> get delegate;
-
-  void add(E value) => delegate.add(value);
-
-  void addAll(Iterable<E> iterable) => delegate.addAll(iterable);
-
-  void addFirst(E value) => delegate.addFirst(value);
-
-  void addLast(E value) => delegate.addLast(value);
-
-  void clear() => delegate.clear();
-
-  bool remove(Object object) => delegate.remove(object);
-
-  E removeFirst() => delegate.removeFirst();
-
-  E removeLast() => delegate.removeLast();
-
-  void removeWhere(bool test(E element)) => delegate.removeWhere(test);
-
-  void retainWhere(bool test(E element)) => delegate.retainWhere(test);
-}