Implement InstanceMirror.== in dart2js and InstanceMirror.hashCode in the VM and …

runtime/lib/mirrors.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 "lib/invocation_mirror.h"
 #include "vm/bootstrap_natives.h"
 #include "vm/class_finalizer.h"
 #include "vm/dart_entry.h"
 #include "vm/exceptions.h"
 #include "vm/object_store.h"
@@ skipping 733 matching lines @@
                            Instance::null_instance());
 }
 
 
 DEFINE_NATIVE_ENTRY(TypeVariableMirror_upper_bound, 1) {
   GET_NON_NULL_NATIVE_ARGUMENT(TypeParameter, param, arguments->NativeArgAt(0));
   return param.bound();
 }
 
 
+DEFINE_NATIVE_ENTRY(InstanceMirror_identityHash, 1) {
+  GET_NATIVE_ARGUMENT(Instance, reflectee, arguments->NativeArgAt(0));
+  ObjectStore* object_store = Isolate::Current()->object_store();

[siva, 2013/09/03 19:43:43]

You should be able to write this as
ObjectStore* object_store = isolate->object_store();

(the current isolate is a parameter to native functions)

[rmacnak, 2013/09/03 20:10:54]

Done.

+  const Class& cls = Class::Handle(object_store->object_class());
+  const Function& function =
+      Function::Handle(cls.LookupDynamicFunction(Symbols::hashCode()));

[siva, 2013/09/03 19:43:43]

Also pass in the isolate to these handles as it is available:
Class::Handle(isolate, ...);
Function::Handle(isolate, ...)
Array::Handle(isolate, ...)

[rmacnak, 2013/09/03 20:10:54]

Done.

+  const Array& args = Array::Handle(Array::New(1));
+  args.SetAt(0, reflectee);
+  return DartEntry::InvokeFunction(function, args);
+}
+
+
 // Invoke the function, or noSuchMethod if it is null. Propagate any unhandled
 // exceptions. Wrap and propagate any compilation errors.
 static RawObject* ReflectivelyInvokeDynamicFunction(const Instance& receiver,
                                                     const Function& function,
                                                     const String& target_name,
                                                     const Array& arguments) {
   // Note "arguments" is already the internal arguments with the receiver as
   // the first element.
   Object& result = Object::Handle();
   if (function.IsNull() || !function.is_visible()) {
@@ skipping 613 matching lines @@
 }
 
 
 DEFINE_NATIVE_ENTRY(VariableMirror_type, 1) {
   GET_NON_NULL_NATIVE_ARGUMENT(MirrorReference, ref, arguments->NativeArgAt(0));
   const Field& field = Field::Handle(ref.GetFieldReferent());
   return field.type();
 }
 
 }  // namespace dart