/Users/buildslave/jenkins/workspace/coverage/llvm-project/clang/include/clang/Basic/ParsedAttrInfo.h
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1 | | //===- ParsedAttrInfo.h - Info needed to parse an attribute -----*- 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 the ParsedAttrInfo class, which dictates how to |
10 | | // parse an attribute. This class is the one that plugins derive to |
11 | | // define a new attribute. |
12 | | // |
13 | | //===----------------------------------------------------------------------===// |
14 | | |
15 | | #ifndef LLVM_CLANG_BASIC_PARSEDATTRINFO_H |
16 | | #define LLVM_CLANG_BASIC_PARSEDATTRINFO_H |
17 | | |
18 | | #include "clang/Basic/AttrSubjectMatchRules.h" |
19 | | #include "clang/Basic/AttributeCommonInfo.h" |
20 | | #include "llvm/ADT/ArrayRef.h" |
21 | | #include "llvm/Support/Registry.h" |
22 | | #include <climits> |
23 | | #include <list> |
24 | | |
25 | | namespace clang { |
26 | | |
27 | | class Decl; |
28 | | class LangOptions; |
29 | | class ParsedAttr; |
30 | | class Sema; |
31 | | class Stmt; |
32 | | class TargetInfo; |
33 | | |
34 | | struct ParsedAttrInfo { |
35 | | /// Corresponds to the Kind enum. |
36 | | unsigned AttrKind : 16; |
37 | | /// The number of required arguments of this attribute. |
38 | | unsigned NumArgs : 4; |
39 | | /// The number of optional arguments of this attributes. |
40 | | unsigned OptArgs : 4; |
41 | | /// The number of non-fake arguments specified in the attribute definition. |
42 | | unsigned NumArgMembers : 4; |
43 | | /// True if the parsing does not match the semantic content. |
44 | | unsigned HasCustomParsing : 1; |
45 | | // True if this attribute accepts expression parameter pack expansions. |
46 | | unsigned AcceptsExprPack : 1; |
47 | | /// True if this attribute is only available for certain targets. |
48 | | unsigned IsTargetSpecific : 1; |
49 | | /// True if this attribute applies to types. |
50 | | unsigned IsType : 1; |
51 | | /// True if this attribute applies to statements. |
52 | | unsigned IsStmt : 1; |
53 | | /// True if this attribute has any spellings that are known to gcc. |
54 | | unsigned IsKnownToGCC : 1; |
55 | | /// True if this attribute is supported by #pragma clang attribute. |
56 | | unsigned IsSupportedByPragmaAttribute : 1; |
57 | | /// The syntaxes supported by this attribute and how they're spelled. |
58 | | struct Spelling { |
59 | | AttributeCommonInfo::Syntax Syntax; |
60 | | const char *NormalizedFullName; |
61 | | }; |
62 | | ArrayRef<Spelling> Spellings; |
63 | | // The names of the known arguments of this attribute. |
64 | | ArrayRef<const char *> ArgNames; |
65 | | |
66 | | protected: |
67 | | constexpr ParsedAttrInfo(AttributeCommonInfo::Kind AttrKind = |
68 | | AttributeCommonInfo::NoSemaHandlerAttribute) |
69 | | : AttrKind(AttrKind), NumArgs(0), OptArgs(0), NumArgMembers(0), |
70 | | HasCustomParsing(0), AcceptsExprPack(0), IsTargetSpecific(0), IsType(0), |
71 | 0 | IsStmt(0), IsKnownToGCC(0), IsSupportedByPragmaAttribute(0) {} |
72 | | |
73 | | constexpr ParsedAttrInfo(AttributeCommonInfo::Kind AttrKind, unsigned NumArgs, |
74 | | unsigned OptArgs, unsigned NumArgMembers, |
75 | | unsigned HasCustomParsing, unsigned AcceptsExprPack, |
76 | | unsigned IsTargetSpecific, unsigned IsType, |
77 | | unsigned IsStmt, unsigned IsKnownToGCC, |
78 | | unsigned IsSupportedByPragmaAttribute, |
79 | | ArrayRef<Spelling> Spellings, |
80 | | ArrayRef<const char *> ArgNames) |
81 | | : AttrKind(AttrKind), NumArgs(NumArgs), OptArgs(OptArgs), |
82 | | NumArgMembers(NumArgMembers), HasCustomParsing(HasCustomParsing), |
83 | | AcceptsExprPack(AcceptsExprPack), IsTargetSpecific(IsTargetSpecific), |
84 | | IsType(IsType), IsStmt(IsStmt), IsKnownToGCC(IsKnownToGCC), |
85 | | IsSupportedByPragmaAttribute(IsSupportedByPragmaAttribute), |
86 | 0 | Spellings(Spellings), ArgNames(ArgNames) {} |
87 | | |
88 | | public: |
89 | 167 | virtual ~ParsedAttrInfo() = default; |
90 | | |
91 | | /// Check if this attribute has specified spelling. |
92 | 0 | bool hasSpelling(AttributeCommonInfo::Syntax Syntax, StringRef Name) const { |
93 | 0 | return llvm::any_of(Spellings, [&](const Spelling &S) { |
94 | 0 | return (S.Syntax == Syntax && S.NormalizedFullName == Name); |
95 | 0 | }); |
96 | 0 | } |
97 | | |
98 | | /// Check if this attribute appertains to D, and issue a diagnostic if not. |
99 | | virtual bool diagAppertainsToDecl(Sema &S, const ParsedAttr &Attr, |
100 | 5.18M | const Decl *D) const { |
101 | 5.18M | return true; |
102 | 5.18M | } |
103 | | /// Check if this attribute appertains to St, and issue a diagnostic if not. |
104 | | virtual bool diagAppertainsToStmt(Sema &S, const ParsedAttr &Attr, |
105 | 628 | const Stmt *St) const { |
106 | 628 | return true; |
107 | 628 | } |
108 | | /// Check if the given attribute is mutually exclusive with other attributes |
109 | | /// already applied to the given declaration. |
110 | | virtual bool diagMutualExclusion(Sema &S, const ParsedAttr &A, |
111 | 79.2M | const Decl *D) const { |
112 | 79.2M | return true; |
113 | 79.2M | } |
114 | | /// Check if this attribute is allowed by the language we are compiling. |
115 | 106M | virtual bool acceptsLangOpts(const LangOptions &LO) const { return true; } |
116 | | |
117 | | /// Check if this attribute is allowed when compiling for the given target. |
118 | 164M | virtual bool existsInTarget(const TargetInfo &Target) const { return true; } |
119 | | /// Convert the spelling index of Attr to a semantic spelling enum value. |
120 | | virtual unsigned |
121 | 0 | spellingIndexToSemanticSpelling(const ParsedAttr &Attr) const { |
122 | 0 | return UINT_MAX; |
123 | 0 | } |
124 | | /// Returns true if the specified parameter index for this attribute in |
125 | | /// Attr.td is an ExprArgument or VariadicExprArgument, or a subclass thereof; |
126 | | /// returns false otherwise. |
127 | 0 | virtual bool isParamExpr(size_t N) const { return false; } |
128 | | /// Populate Rules with the match rules of this attribute. |
129 | | virtual void getPragmaAttributeMatchRules( |
130 | | llvm::SmallVectorImpl<std::pair<attr::SubjectMatchRule, bool>> &Rules, |
131 | 95 | const LangOptions &LangOpts) const {} |
132 | | |
133 | | enum AttrHandling { NotHandled, AttributeApplied, AttributeNotApplied }; |
134 | | /// If this ParsedAttrInfo knows how to handle this ParsedAttr applied to this |
135 | | /// Decl then do so and return either AttributeApplied if it was applied or |
136 | | /// AttributeNotApplied if it wasn't. Otherwise return NotHandled. |
137 | | virtual AttrHandling handleDeclAttribute(Sema &S, Decl *D, |
138 | 2.21M | const ParsedAttr &Attr) const { |
139 | 2.21M | return NotHandled; |
140 | 2.21M | } |
141 | | |
142 | | static const ParsedAttrInfo &get(const AttributeCommonInfo &A); |
143 | | static ArrayRef<const ParsedAttrInfo *> getAllBuiltin(); |
144 | | }; |
145 | | |
146 | | typedef llvm::Registry<ParsedAttrInfo> ParsedAttrInfoRegistry; |
147 | | |
148 | | const std::list<std::unique_ptr<ParsedAttrInfo>> &getAttributePluginInstances(); |
149 | | |
150 | | } // namespace clang |
151 | | |
152 | | #endif // LLVM_CLANG_BASIC_PARSEDATTRINFO_H |