Add generic argument to Codec.fuse.

sdk/lib/convert/codec.dart

Index: sdk/lib/convert/codec.dart
diff --git a/sdk/lib/convert/codec.dart b/sdk/lib/convert/codec.dart
index 3fc2d31256c8d5afc075377814125cdb070a1557..2bd621f020096729a3588ad2603aa6ba21326189 100644
--- a/sdk/lib/convert/codec.dart
+++ b/sdk/lib/convert/codec.dart
@@ -62,8 +62,8 @@ abstract class Codec<S, T> {
    */
   // TODO(floitsch): use better example with line-splitter once that one is
   // in this library.
-  Codec<S, dynamic> fuse(Codec<T, dynamic> other) {
-    return new _FusedCodec<S, T, dynamic>(this, other);
+  Codec<S, dynamic/*=TT*/> fuse/*<TT>*/(Codec<T, dynamic/*=TT*/> other) {

[Lasse Reichstein Nielsen, 2016/11/04 09:12:38]

TT -> R?
(Why double-letter name. Are we using that elsewhere?)

[floitsch, 2016/11/04 09:18:29]

I used it for Converter.fuse. But changed to `R`.

+    return new _FusedCodec<S, T, dynamic/*=TT*/>(this, other);
   }
 
   /**