Subversion Repositories QNX 8.QNX8 LLVM/Clang compiler suite

//===- ASTDiffInternal.h --------------------------------------*- C++ -*- -===//

//

//

// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

// See https://llvm.org/LICENSE.txt for license information.

// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

//

//===----------------------------------------------------------------------===//

#ifndef LLVM_CLANG_TOOLING_ASTDIFF_ASTDIFFINTERNAL_H

#define LLVM_CLANG_TOOLING_ASTDIFF_ASTDIFFINTERNAL_H

#include "clang/AST/ASTTypeTraits.h"

namespace clang {

namespace diff {

using DynTypedNode = DynTypedNode;

/// Within a tree, this identifies a node by its preorder offset.

struct NodeId {

private:

  static constexpr int InvalidNodeId = -1;

public:

  int Id;

  NodeId() : Id(InvalidNodeId) {}

  NodeId(int Id) : Id(Id) {}

  operator int() const { return Id; }

  NodeId &operator++() { return ++Id, *this; }

  NodeId &operator--() { return --Id, *this; }

  // Support defining iterators on NodeId.

  NodeId &operator*() { return *this; }

  bool isValid() const { return Id != InvalidNodeId; }

  bool isInvalid() const { return Id == InvalidNodeId; }

};

} // end namespace diff

} // end namespace clang

#endif