Fix equality of implicit closures in the Dart VM.

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 961 matching lines @@
   cls = Class::New<Bigint>();
   object_store->set_bigint_class(cls);
   RegisterPrivateClass(cls, Symbols::_Bigint(), core_lib);
   pending_classes.Add(cls, Heap::kOld);
 
   cls = Class::New<Double>();
   object_store->set_double_class(cls);
   RegisterPrivateClass(cls, Symbols::_Double(), core_lib);
   pending_classes.Add(cls, Heap::kOld);
 
+  // Abstract super class for all signature classes.
+  cls = Class::New<Instance>(kIllegalCid);
+  cls.set_is_prefinalized();
+  RegisterPrivateClass(cls, Symbols::FunctionImpl(), core_lib);
+  pending_classes.Add(cls, Heap::kOld);
+  type = Type::NewNonParameterizedType(cls);
+  object_store->set_function_impl_type(type);
+
   cls = Class::New<WeakProperty>();
   object_store->set_weak_property_class(cls);
   RegisterPrivateClass(cls, Symbols::_WeakProperty(), core_lib);
 
   // Pre-register the mirrors library so we can place the vm class
   // MirrorReference there rather than the core library.
   lib = Library::LookupLibrary(Symbols::DartMirrors());
   if (lib.IsNull()) {
     lib = Library::NewLibraryHelper(Symbols::DartMirrors(), true);
     lib.Register();
@@ skipping 111 matching lines @@
 
   cls = Class::New<Instance>(kIllegalCid);
   RegisterClass(cls, Symbols::Double(), core_lib);
   cls.set_is_prefinalized();
   pending_classes.Add(cls, Heap::kOld);
   type = Type::NewNonParameterizedType(cls);
   object_store->set_double_type(type);
 
   name = Symbols::New("String");
   cls = Class::New<Instance>(kIllegalCid);
-  cls.set_is_prefinalized();
   RegisterClass(cls, name, core_lib);
   cls.set_is_prefinalized();
   pending_classes.Add(cls, Heap::kOld);
   type = Type::NewNonParameterizedType(cls);
   object_store->set_string_type(type);
 
   cls = object_store->bool_class();
   type = Type::NewNonParameterizedType(cls);
   object_store->set_bool_type(type);
 
@@ skipping 750 matching lines @@
                     false,  // Not const.
                     false,  // Not abstract.
                     false,  // Not external.
                     *this,
                     0));  // No token position.
   ArgumentsDescriptor desc(args_desc);
   invocation.set_num_fixed_parameters(desc.PositionalCount());
   invocation.SetNumOptionalParameters(desc.NamedCount(),
                                       false);  // Not positional.
   invocation.set_parameter_types(Array::Handle(Array::New(desc.Count(),
-                                                         Heap::kOld)));
+                                                          Heap::kOld)));
   invocation.set_parameter_names(Array::Handle(Array::New(desc.Count(),
-                                                         Heap::kOld)));
+                                                          Heap::kOld)));
   // Receiver.
   invocation.SetParameterTypeAt(0, Type::Handle(Type::DynamicType()));
   invocation.SetParameterNameAt(0, Symbols::This());
   // Remaining positional parameters.
   intptr_t i = 1;
   for (; i < desc.PositionalCount(); i++) {
     invocation.SetParameterTypeAt(i, Type::Handle(Type::DynamicType()));
     char name[64];
     OS::SNPrint(name, 64, ":p%"Pd, i);
     invocation.SetParameterNameAt(i, String::Handle(Symbols::New(name)));
@@ skipping 225 matching lines @@
   result.set_token_pos(token_pos);
   return result.raw();
 }
 
 
 RawClass* Class::NewSignatureClass(const String& name,
                                    const Function& signature_function,
                                    const Script& script,
                                    intptr_t token_pos) {
   const Class& result = Class::Handle(New(name, script, token_pos));
-  const Type& super_type = Type::Handle(Type::ObjectType());
-  ASSERT(!super_type.IsNull());
   // Instances of a signature class can only be closures.
   result.set_instance_size(Closure::InstanceSize());
   result.set_next_field_offset(Closure::InstanceSize());
-  result.set_super_type(super_type);
+  // 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".
   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);
   }
@@ skipping 12464 matching lines @@
 }
 
 
 void MirrorReference::PrintToJSONStream(JSONStream* stream, bool ref) const {
   stream->OpenObject();
   stream->CloseObject();
 }
 
 
 }  // namespace dart