1 | //===--- ASTLambda.h - Lambda Helper Functions --------------*- 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 | /// \file |
10 | /// This file provides some common utility functions for processing |
11 | /// Lambda related AST Constructs. |
12 | /// |
13 | //===----------------------------------------------------------------------===// |
14 | |
15 | #ifndef LLVM_CLANG_AST_ASTLAMBDA_H |
16 | #define LLVM_CLANG_AST_ASTLAMBDA_H |
17 | |
18 | #include "clang/AST/DeclCXX.h" |
19 | #include "clang/AST/DeclTemplate.h" |
20 | #include "llvm/Support/Casting.h" |
21 | |
22 | namespace clang { |
23 | inline StringRef getLambdaStaticInvokerName() { |
24 | return "__invoke"; |
25 | } |
26 | // This function returns true if M is a specialization, a template, |
27 | // or a non-generic lambda call operator. |
28 | inline bool isLambdaCallOperator(const CXXMethodDecl *MD) { |
29 | const CXXRecordDecl *LambdaClass = MD->getParent(); |
30 | if (!LambdaClass || !LambdaClass->isLambda()) return false; |
31 | return MD->getOverloadedOperator() == OO_Call; |
32 | } |
33 | |
34 | inline bool isLambdaCallOperator(const DeclContext *DC) { |
35 | if (!DC || !isa<CXXMethodDecl>(Val: DC)) return false; |
36 | return isLambdaCallOperator(MD: cast<CXXMethodDecl>(Val: DC)); |
37 | } |
38 | |
39 | inline bool isLambdaMethod(const DeclContext *DC) { |
40 | if (const auto *MD = dyn_cast_if_present<CXXMethodDecl>(Val: DC)) |
41 | return MD->getParent()->isLambda(); |
42 | return false; |
43 | } |
44 | |
45 | inline bool isLambdaCallWithExplicitObjectParameter(const DeclContext *DC) { |
46 | return isLambdaCallOperator(DC) && |
47 | cast<CXXMethodDecl>(Val: DC)->isExplicitObjectMemberFunction(); |
48 | } |
49 | |
50 | inline bool isLambdaCallWithImplicitObjectParameter(const DeclContext *DC) { |
51 | return isLambdaCallOperator(DC) && |
52 | // FIXME: Checking for a null type is not great |
53 | // but lambdas with invalid captures or whose closure parameter list |
54 | // have not fully been parsed may have a call operator whose type is |
55 | // null. |
56 | !cast<CXXMethodDecl>(Val: DC)->getType().isNull() && |
57 | !cast<CXXMethodDecl>(Val: DC)->isExplicitObjectMemberFunction(); |
58 | } |
59 | |
60 | inline bool isGenericLambdaCallOperatorSpecialization(const CXXMethodDecl *MD) { |
61 | if (!MD) return false; |
62 | const CXXRecordDecl *LambdaClass = MD->getParent(); |
63 | if (LambdaClass && LambdaClass->isGenericLambda()) |
64 | return isLambdaCallOperator(MD) && |
65 | MD->isFunctionTemplateSpecialization(); |
66 | return false; |
67 | } |
68 | |
69 | inline bool isLambdaConversionOperator(CXXConversionDecl *C) { |
70 | return C ? C->getParent()->isLambda() : false; |
71 | } |
72 | |
73 | inline bool isLambdaConversionOperator(Decl *D) { |
74 | if (!D) return false; |
75 | if (CXXConversionDecl *Conv = dyn_cast<CXXConversionDecl>(Val: D)) |
76 | return isLambdaConversionOperator(C: Conv); |
77 | if (FunctionTemplateDecl *F = dyn_cast<FunctionTemplateDecl>(Val: D)) |
78 | if (CXXConversionDecl *Conv = |
79 | dyn_cast_or_null<CXXConversionDecl>(Val: F->getTemplatedDecl())) |
80 | return isLambdaConversionOperator(C: Conv); |
81 | return false; |
82 | } |
83 | |
84 | inline bool isGenericLambdaCallOperatorSpecialization(DeclContext *DC) { |
85 | return isGenericLambdaCallOperatorSpecialization( |
86 | MD: dyn_cast<CXXMethodDecl>(Val: DC)); |
87 | } |
88 | |
89 | inline bool isGenericLambdaCallOperatorOrStaticInvokerSpecialization( |
90 | const DeclContext *DC) { |
91 | const auto *MD = dyn_cast<CXXMethodDecl>(Val: DC); |
92 | if (!MD) return false; |
93 | const CXXRecordDecl *LambdaClass = MD->getParent(); |
94 | if (LambdaClass && LambdaClass->isGenericLambda()) |
95 | return (isLambdaCallOperator(MD) || MD->isLambdaStaticInvoker()) && |
96 | MD->isFunctionTemplateSpecialization(); |
97 | return false; |
98 | } |
99 | |
100 | // This returns the parent DeclContext ensuring that the correct |
101 | // parent DeclContext is returned for Lambdas |
102 | inline DeclContext *getLambdaAwareParentOfDeclContext(DeclContext *DC) { |
103 | if (isLambdaCallOperator(DC)) |
104 | return DC->getParent()->getParent(); |
105 | else |
106 | return DC->getParent(); |
107 | } |
108 | |
109 | } // clang |
110 | |
111 | #endif |
112 |