Report a compile-time error when a setter has not exactly one formal parameter.

sdk/lib/_internal/compiler/implementation/warnings.dart

Index: sdk/lib/_internal/compiler/implementation/warnings.dart
diff --git a/sdk/lib/_internal/compiler/implementation/warnings.dart b/sdk/lib/_internal/compiler/implementation/warnings.dart
index fa8289d7a96e81b83fad1465e639aa9311145565..52299f9da23a709a01f9feabf272ae327be91002 100644
--- a/sdk/lib/_internal/compiler/implementation/warnings.dart
+++ b/sdk/lib/_internal/compiler/implementation/warnings.dart
@@ -219,6 +219,9 @@ class MessageKind {
   static const SETTER_MISMATCH = const MessageKind(
       "Error: getter disagrees on: #{1}.");
 
+  static const ILLEGAL_SETTER_FORMALS = const MessageKind(
+      "Error: setter must have exactly one argument.");

[ahe, 2012/12/05 20:17:06]

"a setter"?

[karlklose, 2012/12/06 09:13:32]

Done.

+
   static const NO_STATIC_OVERRIDE = const MessageKind(
       "Error: static member cannot override instance member '#{1}' of '#{2}'.");