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

runtime/vm/parser.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/parser.h"
 
 #include "vm/bigint_operations.h"
 #include "vm/class_finalizer.h"
 #include "vm/compiler.h"
 #include "vm/compiler_stats.h"
@@ skipping 2176 matching lines @@
     ErrorMsg(method->name_pos,
              "field or method '%s' already defined", method->name->ToCString());
   }
 
   // Parse the formal parameters.
   // The first parameter of factory methods is an implicit parameter called
   // 'this' of type AbstractTypeArguments.
   const bool has_this_param =
       !method->has_static || method->IsConstructor() || method->has_factory;
   const bool are_implicitly_final = method->has_const;
-  const bool allow_explicit_default_values =
-      (!method->has_abstract && !members->is_interface());
+  const bool allow_explicit_default_values = true;
   const intptr_t formal_param_pos = token_index_;
   method->params.Clear();
   if (has_this_param) {
     method->params.AddReceiver(formal_param_pos);
   }
   // Constructors have an implicit parameter for the construction phase.
   if (method->IsConstructor()) {
     method->params.AddFinalParameter(
         token_index_,
         kPhaseParameterName,
@@ skipping 6267 matching lines @@
 void Parser::SkipQualIdent() {
   ASSERT(IsIdentifier());
   ConsumeToken();
   if (CurrentToken() == Token::kPERIOD) {
     ConsumeToken();  // Consume the kPERIOD token.
     ExpectIdentifier("identifier expected after '.'");
   }
 }
 
 }  // namespace dart