Support runtime check of function types.

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

Index: sdk/lib/_internal/compiler/implementation/compiler.dart
diff --git a/sdk/lib/_internal/compiler/implementation/compiler.dart b/sdk/lib/_internal/compiler/implementation/compiler.dart
index f71d6e61513d2cbaa4c02e0e0aad32836bdd939e..0f65b21cc3b630dab1c0b996436f75432a188628 100644
--- a/sdk/lib/_internal/compiler/implementation/compiler.dart
+++ b/sdk/lib/_internal/compiler/implementation/compiler.dart
@@ -130,6 +130,7 @@ abstract class Backend {
   }
 
   bool needsRti(ClassElement cls);

[karlklose, 2013/06/19 14:37:05]

Should we rename it to classNeedsRti?

[Johnni Winther, 2013/06/21 12:19:15]

Done.

+  bool methodNeedsRti(Element cls);
 
   // The following methods are hooks for the backend to register its
   // helper methods.
@@ -155,7 +156,22 @@ abstract class Backend {
   void registerFallThroughError(TreeElements elements) {}
   void registerSuperNoSuchMethod(TreeElements elements) {}
   void registerConstantMap(TreeElements elements) {}
-  void registerRuntimeType(TreeElements elements) {}
+  /**
+   * Call this to register that an instantiated generic class has a call
+   * method.
+   */
+  void registerGenericCallMethod(Element callMethod,
+                                 Enqueuer enqueuer, TreeElements elements) {}
+  /**
+   * Call this to register that a getter exists for a function on an
+   * instantiated generic class.
+   */
+  void registerGenericClosure(Element closure,
+                              Enqueuer enqueuer, TreeElements elements) {}
+  /**
+   * Call this to register that the [:runtimeType:] property has been accessed.
+   */
+  void registerRuntimeType(Enqueuer enqueuer, TreeElements elements) {}
 
   void registerRequiredType(DartType type, Element enclosingElement) {}
   void registerClassUsingVariableExpression(ClassElement cls) {}