Reintroducing parser changes to cause compile-time errors when trying to reinitialize a final field…

runtime/vm/parser.h

 // 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.
 
 #ifndef RUNTIME_VM_PARSER_H_
 #define RUNTIME_VM_PARSER_H_
 
 #include "include/dart_api.h"
 
 #include "platform/assert.h"
@@ skipping 545 matching lines @@
       bool allow_void,
       ClassFinalizer::FinalizationKind finalization);
   void ParseTypeParameters(bool parameterizing_class);
   RawTypeArguments* ParseTypeArguments(
       ClassFinalizer::FinalizationKind finalization);
   void ParseMethodOrConstructor(ClassDesc* members, MemberDesc* method);
   void ParseFieldDefinition(ClassDesc* members, MemberDesc* field);
   void CheckMemberNameConflict(ClassDesc* members, MemberDesc* member);
   void ParseClassMemberDefinition(ClassDesc* members,
                                   TokenPosition metadata_pos);
+  void CheckFinalInitializationConflicts(const ClassDesc* class_desc,
+                                         const MemberDesc* member);
   void ParseParameterType(ParamList* params);
   void ParseFormalParameter(bool allow_explicit_default_value,
                             bool evaluate_metadata,
                             ParamList* params);
   void ParseFormalParameters(bool use_function_type_syntax,
                              bool allow_explicit_default_values,
                              bool evaluate_metadata,
                              ParamList* params);
   void ParseFormalParameterList(bool use_function_type_syntax,
                                 bool allow_explicit_default_values,
@@ skipping 450 matching lines @@
 
   intptr_t recursion_counter_;
   friend class RecursionChecker;
 
   DISALLOW_COPY_AND_ASSIGN(Parser);
 };
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_PARSER_H_