/Users/buildslave/jenkins/workspace/coverage/llvm-project/clang/include/clang/Sema/CXXFieldCollector.h
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1 | | //===- CXXFieldCollector.h - Utility class for C++ class semantic analysis ===// |
2 | | // |
3 | | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | | // See https://llvm.org/LICENSE.txt for license information. |
5 | | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | | // |
7 | | //===----------------------------------------------------------------------===// |
8 | | // |
9 | | // This file provides CXXFieldCollector that is used during parsing & semantic |
10 | | // analysis of C++ classes. |
11 | | // |
12 | | //===----------------------------------------------------------------------===// |
13 | | |
14 | | #ifndef LLVM_CLANG_SEMA_CXXFIELDCOLLECTOR_H |
15 | | #define LLVM_CLANG_SEMA_CXXFIELDCOLLECTOR_H |
16 | | |
17 | | #include "clang/Basic/LLVM.h" |
18 | | #include "llvm/ADT/SmallVector.h" |
19 | | |
20 | | namespace clang { |
21 | | class FieldDecl; |
22 | | |
23 | | /// CXXFieldCollector - Used to keep track of CXXFieldDecls during parsing of |
24 | | /// C++ classes. |
25 | | class CXXFieldCollector { |
26 | | /// Fields - Contains all FieldDecls collected during parsing of a C++ |
27 | | /// class. When a nested class is entered, its fields are appended to the |
28 | | /// fields of its parent class, when it is exited its fields are removed. |
29 | | SmallVector<FieldDecl*, 32> Fields; |
30 | | |
31 | | /// FieldCount - Each entry represents the number of fields collected during |
32 | | /// the parsing of a C++ class. When a nested class is entered, a new field |
33 | | /// count is pushed, when it is exited, the field count is popped. |
34 | | SmallVector<size_t, 4> FieldCount; |
35 | | |
36 | | // Example: |
37 | | // |
38 | | // class C { |
39 | | // int x,y; |
40 | | // class NC { |
41 | | // int q; |
42 | | // // At this point, Fields contains [x,y,q] decls and FieldCount contains |
43 | | // // [2,1]. |
44 | | // }; |
45 | | // int z; |
46 | | // // At this point, Fields contains [x,y,z] decls and FieldCount contains |
47 | | // // [3]. |
48 | | // }; |
49 | | |
50 | | public: |
51 | | /// StartClass - Called by Sema::ActOnStartCXXClassDef. |
52 | 790k | void StartClass() { FieldCount.push_back(0); } |
53 | | |
54 | | /// Add - Called by Sema::ActOnCXXMemberDeclarator. |
55 | 1.09M | void Add(FieldDecl *D) { |
56 | 1.09M | Fields.push_back(D); |
57 | 1.09M | ++FieldCount.back(); |
58 | 1.09M | } |
59 | | |
60 | | /// getCurNumField - The number of fields added to the currently parsed class. |
61 | 2.37M | size_t getCurNumFields() const { |
62 | 2.37M | assert(!FieldCount.empty() && "no currently-parsed class"); |
63 | 0 | return FieldCount.back(); |
64 | 2.37M | } |
65 | | |
66 | | /// getCurFields - Pointer to array of fields added to the currently parsed |
67 | | /// class. |
68 | 790k | FieldDecl **getCurFields() { return &*(Fields.end() - getCurNumFields()); } |
69 | | |
70 | | /// FinishClass - Called by Sema::ActOnFinishCXXClassDef. |
71 | 790k | void FinishClass() { |
72 | 790k | Fields.resize(Fields.size() - getCurNumFields()); |
73 | 790k | FieldCount.pop_back(); |
74 | 790k | } |
75 | | }; |
76 | | |
77 | | } // end namespace clang |
78 | | |
79 | | #endif |