Added macros OBJECT_IMPLEMENTATION and FINAL_OBJECT_IMPLEMENTATION

lib/string.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"
 #include "vm/symbols.h"
@@ skipping 105 matching lines @@
 
 
 DEFINE_NATIVE_ENTRY(String_getLength, 1) {
   const String& receiver = String::CheckedHandle(arguments->NativeArgAt(0));
   return Smi::New(receiver.Length());
 }
 
 
 static int32_t StringValueAt(const String& str, const Integer& index) {
   if (index.IsSmi()) {
-    Smi& smi = Smi::Handle();
-    smi |= index.raw();
+    const Smi& smi = Smi::Cast(index);
     int32_t index = smi.Value();
     if ((index < 0) || (index >= str.Length())) {
       const Array& args = Array::Handle(Array::New(1));
       args.SetAt(0, smi);
       Exceptions::ThrowByType(Exceptions::kRange, args);
     }
     return str.CharAt(index);
   } else {
     // An index larger than Smi is always illegal.
     const Array& args = Array::Handle(Array::New(1));
@@ skipping 54 matching lines @@
     if (!elem.IsString()) {
       const Array& args = Array::Handle(Array::New(1));
       args.SetAt(0, elem);
       Exceptions::ThrowByType(Exceptions::kArgument, args);
     }
   }
   return String::ConcatAll(strings);
 }
 
 }  // namespace dart