Implement argument definition test in the vm.

runtime/vm/scopes.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 VM_SCOPES_H_
 #define VM_SCOPES_H_
 
 #include "vm/allocation.h"
 #include "vm/assembler.h"
 #include "vm/growable_array.h"
+#include "vm/symbols.h"
 
 namespace dart {
 
 class BitVector;
 class JoinEntryInstr;
 class LocalScope;
 class LocalVariable;
 class SourceLabel;
 
 
@@ skipping 50 matching lines @@
   }
 
   bool Equals(const LocalVariable& other) const;
 
   // Map the frame index to a bit-vector index.  Assumes the variable is
   // allocated to the frame.
   // var_count is the total number of stack-allocated variables including
   // all parameters.
   int BitIndexIn(intptr_t var_count) const;
 
-  // Name of the internal variable that is used to save the context chain
-  // on function entry.
-  static const char* kSavedContextVarName;
-
  private:
   static const int kUnitializedIndex = INT_MIN;
 
   const intptr_t token_pos_;
   const String& name_;
   LocalScope* owner_;  // Local scope declaring this variable.
 
   const AbstractType& type_;  // Declaration type of local variable.
 
   bool is_final_;  // If true, this variable is readonly.
@@ skipping 32 matching lines @@
       join_for_break_(NULL),
       join_for_continue_(NULL),
       is_continue_target_(false) {
   }
 
   static SourceLabel* New(intptr_t token_pos, String* name, Kind kind) {
     if (name != NULL) {
       return new SourceLabel(token_pos, *name, kind);
     } else {
       return new SourceLabel(token_pos,
-                             String::ZoneHandle(String::New(kDefaultLabelName)),
+                             String::ZoneHandle(Symbols::DefaultLabel()),
                              kind);
     }
   }
 
   intptr_t token_pos() const { return token_pos_; }
   const String& name() const { return name_; }
   LocalScope* owner() const { return owner_; }
   void set_owner(LocalScope* owner) {
     ASSERT(owner_ == NULL);
     owner_ = owner;
@@ skipping 33 matching lines @@
   const intptr_t token_pos_;
   const String& name_;
   LocalScope* owner_;  // Local scope declaring this label.
 
   Kind kind_;
   Label continue_label_;
   Label break_label_;
   JoinEntryInstr* join_for_break_;
   JoinEntryInstr* join_for_continue_;
   bool is_continue_target_;  // Needed for CaseNode.
-  static const char* kDefaultLabelName;
 
   DISALLOW_COPY_AND_ASSIGN(SourceLabel);
 };
 
 
 class LocalScope : public ZoneAllocated {
  public:
   LocalScope(LocalScope* parent, int function_level, int loop_level);
 
   LocalScope* parent() const { return parent_; }
@@ skipping 142 matching lines @@
   intptr_t end_token_pos_;    // Token index of end of scope.
   GrowableArray<LocalVariable*> variables_;
   GrowableArray<SourceLabel*> labels_;
 
   DISALLOW_COPY_AND_ASSIGN(LocalScope);
 };
 
 }  // namespace dart
 
 #endif  // VM_SCOPES_H_