Support runtime check of function types.

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

Index: sdk/lib/_internal/compiler/implementation/ssa/codegen.dart
diff --git a/sdk/lib/_internal/compiler/implementation/ssa/codegen.dart b/sdk/lib/_internal/compiler/implementation/ssa/codegen.dart
index 267d6114ef156502e9d66761f8a31e7ae971f37b..257b553a11cad8d1feb15ce6093133315d547a0f 100644
--- a/sdk/lib/_internal/compiler/implementation/ssa/codegen.dart
+++ b/sdk/lib/_internal/compiler/implementation/ssa/codegen.dart
@@ -2255,9 +2255,15 @@ abstract class SsaCodeGenerator implements HVisitor, HBlockInformationVisitor {
                      message: 'Attempt to check malformed type $type'));
     world.registerIsCheck(type, work.resolutionTree);
     Element element = type.element;
+    String operatorIs;
+    if (type is FunctionType) {

[ngeoffray, 2013/03/13 09:30:46]

Use the kind?

[Johnni Winther, 2013/03/22 07:30:24]

Refactored.

+       operatorIs = backend.namer.operatorIsFunctionType(type);
+    } else {
+       operatorIs = backend.namer.operatorIs(element);
+    }
     use(input);
     js.PropertyAccess field =
-        new js.PropertyAccess.field(pop(), backend.namer.operatorIs(element));
+        new js.PropertyAccess.field(pop(), operatorIs);
     if (backend.emitter.nativeEmitter.requiresNativeIsCheck(element)) {
       push(new js.Call(field, <js.Expression>[]));
       if (negative) push(new js.Prefix('!', pop()));