Default parameter values are now allowed in interface methods and in abstract

runtime/vm/class_finalizer.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/class_finalizer.h"
 
 #include "vm/flags.h"
 #include "vm/heap.h"
 #include "vm/isolate.h"
 #include "vm/longjump.h"
@@ skipping 1094 matching lines @@
     ASSERT(!cls.IsCanonicalSignatureClass());
     // Check for illegal self references.
     GrowableArray<intptr_t> visited_aliases;
     if (!IsAliasCycleFree(cls, &visited_aliases)) {
       const String& name = String::Handle(cls.Name());
       const Script& script = Script::Handle(cls.script());
       ReportError(script, cls.token_index(),
                   "typedef '%s' illegally refers to itself",
                   name.ToCString());
     }
-    // TODO(regis): Also check this: "It is a compile-time error if any default
-    // values are specified in the signature of a function type alias".
     cls.Finalize();
     return;
   }
   // Finalize factory class, if any.
   if (cls.is_interface()) {
     if (cls.HasFactoryClass()) {
       const Class& factory_class = Class::Handle(cls.FactoryClass());
       if (!factory_class.is_finalized()) {
         FinalizeClass(factory_class, generating_snapshot);
         // Finalizing the factory class may indirectly finalize this interface.
@@ skipping 366 matching lines @@
 void ClassFinalizer::ReportError(const char* format, ...) {
   va_list args;
   va_start(args, format);
   const Error& error = Error::Handle(
       Parser::FormatError(Script::Handle(), -1, "Error", format, args));
   va_end(args);
   ReportError(error);
 }
 
 }  // namespace dart