Index: lib/src/delegate/sink.dart |
diff --git a/lib/src/delegate/sink.dart b/lib/src/delegate/sink.dart |
index cee29375b8681eaca07274e1e8ebcdb01b27d330..326c15bdb649fe07a45e99e9984831498e60d6eb 100644 |
--- a/lib/src/delegate/sink.dart |
+++ b/lib/src/delegate/sink.dart |
@@ -10,8 +10,18 @@ class DelegatingSink<T> implements Sink<T> { |
final Sink _sink; |
/// Create a delegating sink forwarding calls to [sink]. |
- DelegatingSink(Sink sink) |
- : _sink = sink; |
+ DelegatingSink(Sink<T> sink) : _sink = sink; |
+ |
+ DelegatingSink._(this._sink); |
+ |
+ /// Creates a wrapper that coerces the type of [sink]. |
+ /// |
+ /// Unlike [new DelegatingSink], this only requires its argument to be an |
+ /// instance of `Sink`, not `Sink<T>`. This means that calls to [add] may |
+ /// throw a [CastError] if the argument type doesn't match the reified type of |
+ /// [sink]. |
+ static Sink/*<T>*/ typed/*<T>*/(Sink sink) => |
+ sink is Sink/*<T>*/ ? sink : new DelegatingSink._(sink); |
void add(T data) { |
_sink.add(data); |