| // Copyright (c) 2016, 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. |
| |
| import 'dart:async'; |
| |
| import '../delegate/stream_sink.dart'; |
| import '../stream_sink_transformer.dart'; |
| |
| /// A wrapper that coerces the generic type of the sink returned by an inner |
| /// transformer to `S`. |
| class TypeSafeStreamSinkTransformer<S, T> |
| implements StreamSinkTransformer<S, T> { |
| final StreamSinkTransformer _inner; |
| |
| TypeSafeStreamSinkTransformer(this._inner); |
| |
| @override |
| StreamSink<S> bind(StreamSink<T> sink) => |
| DelegatingStreamSink.typed(_inner.bind(sink)); |
| } |