- Avoid doubly implementing Function.

runtime/vm/object.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/object.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/cpu.h"
@@ skipping 2166 matching lines @@
                                    intptr_t token_pos) {
   const Class& result = Class::Handle(New(name, script, token_pos));
   // Instances of a signature class can only be closures.
   result.set_instance_size(Closure::InstanceSize());
   result.set_next_field_offset(Closure::InstanceSize());
   // Signature classes extend the _FunctionImpl class.
   result.set_super_type(Type::Handle(
       Isolate::Current()->object_store()->function_impl_type()));
   result.set_is_synthesized_class();
   result.set_type_arguments_field_offset(Closure::type_arguments_offset());
-  // Implements interface "Function".

[Ivan Posva, 2013/08/27 16:07:47]

The interface Function is implemented as part of subclassing FunctionImpl, so
this was redundant.

-  const Type& function_type = Type::Handle(Type::Function());
-  const Array& interfaces = Array::Handle(Array::New(1, Heap::kOld));
-  interfaces.SetAt(0, function_type);
-  result.set_interfaces(interfaces);
   if (!signature_function.IsNull()) {
     result.PatchSignatureFunction(signature_function);
   }
   return result.raw();
 }
 
 
 void Class::PatchSignatureFunction(const Function& signature_function) const {
   ASSERT(!signature_function.IsNull());
   const Class& owner_class = Class::Handle(signature_function.Owner());
@@ skipping 12650 matching lines @@
 }
 
 
 void MirrorReference::PrintToJSONStream(JSONStream* stream, bool ref) const {
   stream->OpenObject();
   stream->CloseObject();
 }
 
 
 }  // namespace dart