ASTDiffInternal.h source code [clang_source_code/include/clang/Tooling/ASTDiff/ASTDiffInternal.h]

1	//===- ASTDiffInternal.h --------------------------------------- C++ -- -===//
2	//
3	//
4	// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5	// See https://llvm.org/LICENSE.txt for license information.
6	// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7	//
8	//===----------------------------------------------------------------------===//
9
10	#ifndef LLVM_CLANG_TOOLING_ASTDIFF_ASTDIFFINTERNAL_H
11	#define LLVM_CLANG_TOOLING_ASTDIFF_ASTDIFFINTERNAL_H
12
13	#include "clang/AST/ASTTypeTraits.h"
14
15	namespace clang {
16	namespace diff {
17
18	using DynTypedNode = ast_type_traits::DynTypedNode;
19
20	class SyntaxTree;
21	class SyntaxTreeImpl;
22	struct ComparisonOptions;
23
24	/// Within a tree, this identifies a node by its preorder offset.
25	struct NodeId {
26	private:
27	static constexpr int InvalidNodeId = -1;
28
29	public:
30	int Id;
31
32	NodeId() : Id(InvalidNodeId) {}
33	NodeId(int Id) : Id(Id) {}
34
35	operator int() const { return Id; }
36	NodeId &operator++() { return ++Id, *this; }
37	NodeId &operator--() { return --Id, *this; }
38	// Support defining iterators on NodeId.
39	NodeId &operator() { return this; }
40
41	bool isValid() const { return Id != InvalidNodeId; }
42	bool isInvalid() const { return Id == InvalidNodeId; }
43	};
44
45	} // end namespace diff
46	} // end namespace clang
47	#endif
48

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