ScopeIndex.h (915B)
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 */