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src/variables.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_VARIABLES_H_
 #define V8_VARIABLES_H_
 
 #include "src/ast-value-factory.h"
 #include "src/interface.h"
 #include "src/zone.h"
@@ skipping 34 matching lines @@
     // the context object on the heap, starting at 0.  scope() is the
     // corresponding scope.
     CONTEXT,
 
     // A named slot in a heap context.  name() is the variable name in the
     // context object on the heap, with lookup starting at the current
     // context.  index() is invalid.
     LOOKUP
   };
 
-  Variable(Scope* scope,
-           const AstRawString* name,
-           VariableMode mode,
-           bool is_valid_ref,
-           Kind kind,
-           InitializationFlag initialization_flag,
+  Variable(Scope* scope, const AstRawString* name, VariableMode mode,
+           bool is_valid_ref, Kind kind, InitializationFlag initialization_flag,
+           MaybeAssignedFlag maybe_assigned_flag = kNotAssigned,
            Interface* interface = Interface::NewValue());
 
   // Printing support
   static const char* Mode2String(VariableMode mode);
 
   bool IsValidReference() { return is_valid_ref_; }
 
   // The source code for an eval() call may refer to a variable that is
   // in an outer scope about which we don't know anything (it may not
   // be the global scope). scope() is NULL in that case. Currently the
   // scope is only used to follow the context chain length.
   Scope* scope() const { return scope_; }
 
   Handle<String> name() const { return name_->string(); }
   const AstRawString* raw_name() const { return name_; }
   VariableMode mode() const { return mode_; }
   bool has_forced_context_allocation() const {
     return force_context_allocation_;
   }
   void ForceContextAllocation() {
     ASSERT(mode_ != TEMPORARY);
     force_context_allocation_ = true;
   }
   bool is_used() { return is_used_; }
   void set_is_used() { is_used_ = true; }
-  bool maybe_assigned() { return maybe_assigned_; }
-  void set_maybe_assigned() { maybe_assigned_ = true; }
+  MaybeAssignedFlag maybe_assigned() const { return maybe_assigned_; }
+  void set_maybe_assigned() { maybe_assigned_ = kMaybeAssigned; }
 
   int initializer_position() { return initializer_position_; }
   void set_initializer_position(int pos) { initializer_position_ = pos; }
 
   bool IsVariable(Handle<String> n) const {
     return !is_this() && name().is_identical_to(n);
   }
 
   bool IsUnallocated() const { return location_ == UNALLOCATED; }
   bool IsParameter() const { return location_ == PARAMETER; }
@@ skipping 54 matching lines @@
   // sloppy 'eval' calls between the reference scope (inclusive) and the
   // binding scope (exclusive).
   Variable* local_if_not_shadowed_;
 
   // Valid as a reference? (const and this are not valid, for example)
   bool is_valid_ref_;
 
   // Usage info.
   bool force_context_allocation_;  // set by variable resolver
   bool is_used_;
-  bool maybe_assigned_;
   InitializationFlag initialization_flag_;
+  MaybeAssignedFlag maybe_assigned_;
 
   // Module type info.
   Interface* interface_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_VARIABLES_H_