js/src/frontend/ScopeIndex.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
   2  * vim: set ts=8 sts=2 et sw=2 tw=80:
   3  * This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef frontend_ScopeIndex_h
   8 #define frontend_ScopeIndex_h
   9
  10 #include <cstdint>  // uint32_t, UINT32_MAX
  11
  12 #include "frontend/TypedIndex.h"  // TypedIndex
  13
  14 namespace js {
  15
  16 class Scope;
  17
  18 class ScopeIndex : public frontend::TypedIndex<Scope> {
  19   // Delegate constructors;
  20   using Base = frontend::TypedIndex<Scope>;
  21   using Base::Base;
  22
  23   static constexpr uint32_t InvalidIndex = UINT32_MAX;
  24
  25  public:
  26   static constexpr ScopeIndex invalid() { return ScopeIndex(InvalidIndex); }
  27   bool isValid() const { return index != InvalidIndex; }
  28 };
  29
  30 } /* namespace js */
  31
  32 #endif /* frontend_ScopeIndex_h */