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 = DynTypedNode; |
19 | |
20 | /// Within a tree, this identifies a node by its preorder offset. |
21 | struct NodeId { |
22 | private: |
23 | static constexpr int InvalidNodeId = -1; |
24 | |
25 | public: |
26 | int Id; |
27 | |
28 | NodeId() : Id(InvalidNodeId) {} |
29 | NodeId(int Id) : Id(Id) {} |
30 | |
31 | operator int() const { return Id; } |
32 | NodeId &operator++() { return ++Id, *this; } |
33 | NodeId &operator--() { return --Id, *this; } |
34 | // Support defining iterators on NodeId. |
35 | NodeId &operator*() { return *this; } |
36 | |
37 | bool isValid() const { return Id != InvalidNodeId; } |
38 | bool isInvalid() const { return Id == InvalidNodeId; } |
39 | }; |
40 | |
41 | } // end namespace diff |
42 | } // end namespace clang |
43 | #endif |
44 | |