//===- 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