Index: lib/src/transformer/typed.dart |
diff --git a/lib/src/transformer/typed.dart b/lib/src/transformer/typed.dart |
new file mode 100644 |
index 0000000000000000000000000000000000000000..f35e01c9858fb64d9a1386b628d9f181db6f11d0 |
--- /dev/null |
+++ b/lib/src/transformer/typed.dart |
@@ -0,0 +1,17 @@ |
+// 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 '../../stream_channel.dart'; |
+ |
+/// A wrapper that coerces the generic type of the channel returned by an inner |
+/// transformer to `S`. |
+class TypeSafeStreamChannelTransformer<S, T> |
+ implements StreamChannelTransformer<S, T> { |
+ final StreamChannelTransformer _inner; |
+ |
+ TypeSafeStreamChannelTransformer(this._inner); |
+ |
+ StreamChannel<S> bind(StreamChannel<T> channel) => |
+ _inner.bind(channel).cast(); |
+} |