- Implement first class types in the VM.

runtime/lib/object.cc

 // Copyright (c) 2011, 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/bootstrap_natives.h"
 
 #include "vm/exceptions.h"
 #include "vm/native_entry.h"
 #include "vm/object.h"
 
@@ skipping 37 matching lines @@
     // Skip receiver.
     for (int i = 1; i < total_num_parameters; i++) {
       array.SetAt(i - 1, String::Handle(function.ParameterNameAt(i)));
     }
     dart_arguments.Add(&array);
   }
   Exceptions::ThrowByType(Exceptions::kNoSuchMethod, dart_arguments);
   return Object::null();
 }
 
+
+DEFINE_NATIVE_ENTRY(Object_runtimeType, 1) {
+  const Instance& instance = Instance::CheckedHandle(arguments->At(0));
+  const Type& type = Type::Handle(instance.GetType());
+  return type.Canonicalize();
+}
+
+
+DEFINE_NATIVE_ENTRY(AbstractType_toString, 1) {
+  const AbstractType& type = AbstractType::CheckedHandle(arguments->At(0));
+  return type.Name();

[regis, 2012/09/27 21:12:40]

You may consider returning UserVisibleName() instead of Name().

[Ivan Posva, 2012/09/27 21:25:12]

I specifically chose Name and not UserVisibleName to avoid the confusion when
for example "int" is not the same as "int" since we have two different actual
int types.

+}
+
 }  // namespace dart