Block scoped const variables.

src/variables.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 100 matching lines @@
   bool IsStackLocal() const { return location_ == LOCAL; }
   bool IsStackAllocated() const { return IsParameter() || IsStackLocal(); }
   bool IsContextSlot() const { return location_ == CONTEXT; }
   bool IsLookupSlot() const { return location_ == LOOKUP; }
 
   bool is_dynamic() const {
     return (mode_ == DYNAMIC ||
             mode_ == DYNAMIC_GLOBAL ||
             mode_ == DYNAMIC_LOCAL);
   }
+  bool is_const_mode() const {
+    return (mode_ == CONST ||
+            mode_ == CONST_HARMONY);
+  }
+  bool binding_needs_init() const {
+    return (mode_ == LET ||
+            mode_ == CONST ||
+            mode_ == CONST_HARMONY);
+  }
 
   bool is_global() const;
   bool is_this() const { return kind_ == THIS; }
   bool is_arguments() const { return kind_ == ARGUMENTS; }
 
   // True if the variable is named eval and not known to be shadowed.
   bool is_possibly_eval() const {
     return IsVariable(FACTORY->eval_symbol()) &&
         (mode_ == DYNAMIC || mode_ == DYNAMIC_GLOBAL);
   }
@@ skipping 34 matching lines @@
 
   // Usage info.
   bool is_accessed_from_inner_scope_;  // set by variable resolver
   bool is_used_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_VARIABLES_H_