/Users/buildslave/jenkins/workspace/coverage/llvm-project/clang/include/clang/AST/CurrentSourceLocExprScope.h
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1 | | //===--- CurrentSourceLocExprScope.h ----------------------------*- C++ -*-===// |
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 defines types used to track the current context needed to evaluate |
10 | | // a SourceLocExpr. |
11 | | // |
12 | | //===----------------------------------------------------------------------===// |
13 | | |
14 | | #ifndef LLVM_CLANG_AST_CURRENTSOURCELOCEXPRSCOPE_H |
15 | | #define LLVM_CLANG_AST_CURRENTSOURCELOCEXPRSCOPE_H |
16 | | |
17 | | #include <cassert> |
18 | | |
19 | | namespace clang { |
20 | | class Expr; |
21 | | |
22 | | /// Represents the current source location and context used to determine the |
23 | | /// value of the source location builtins (ex. __builtin_LINE), including the |
24 | | /// context of default argument and default initializer expressions. |
25 | | class CurrentSourceLocExprScope { |
26 | | /// The CXXDefaultArgExpr or CXXDefaultInitExpr we're currently evaluating. |
27 | | const Expr *DefaultExpr = nullptr; |
28 | | |
29 | | public: |
30 | | /// A RAII style scope guard used for tracking the current source |
31 | | /// location and context as used by the source location builtins |
32 | | /// (ex. __builtin_LINE). |
33 | | class SourceLocExprScopeGuard; |
34 | | |
35 | 15.9k | const Expr *getDefaultExpr() const { return DefaultExpr; } |
36 | | |
37 | 21.2M | explicit CurrentSourceLocExprScope() = default; |
38 | | |
39 | | private: |
40 | | explicit CurrentSourceLocExprScope(const Expr *DefaultExpr) |
41 | 15.4k | : DefaultExpr(DefaultExpr) {} |
42 | | |
43 | | CurrentSourceLocExprScope(CurrentSourceLocExprScope const &) = default; |
44 | | CurrentSourceLocExprScope & |
45 | | operator=(CurrentSourceLocExprScope const &) = default; |
46 | | }; |
47 | | |
48 | | class CurrentSourceLocExprScope::SourceLocExprScopeGuard { |
49 | | public: |
50 | | SourceLocExprScopeGuard(const Expr *DefaultExpr, |
51 | | CurrentSourceLocExprScope &Current) |
52 | 15.5k | : Current(Current), OldVal(Current), Enable(false) { |
53 | 15.5k | assert(DefaultExpr && "the new scope should not be empty"); |
54 | 15.5k | if ((Enable = (Current.getDefaultExpr() == nullptr))) |
55 | 15.4k | Current = CurrentSourceLocExprScope(DefaultExpr); |
56 | 15.5k | } |
57 | | |
58 | 15.5k | ~SourceLocExprScopeGuard() { |
59 | 15.5k | if (Enable) |
60 | 15.4k | Current = OldVal; |
61 | 15.5k | } |
62 | | |
63 | | private: |
64 | | SourceLocExprScopeGuard(SourceLocExprScopeGuard const &) = delete; |
65 | | SourceLocExprScopeGuard &operator=(SourceLocExprScopeGuard const &) = delete; |
66 | | |
67 | | CurrentSourceLocExprScope &Current; |
68 | | CurrentSourceLocExprScope OldVal; |
69 | | bool Enable; |
70 | | }; |
71 | | |
72 | | } // end namespace clang |
73 | | |
74 | | #endif // LLVM_CLANG_AST_CURRENTSOURCELOCEXPRSCOPE_H |