1 //===--- ASTTypeTraits.cpp --------------------------------------*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // Provides a dynamic type identifier and a dynamically typed node container
11 // that can be used to store an AST base node at runtime in the same storage in
12 // a type safe way.
13 //
14 //===----------------------------------------------------------------------===//
15
16 #include "clang/AST/ASTTypeTraits.h"
17 #include "clang/AST/ASTContext.h"
18 #include "clang/AST/DeclCXX.h"
19
20 namespace clang {
21 namespace ast_type_traits {
22
23 const ASTNodeKind::KindInfo ASTNodeKind::AllKindInfo[] = {
24 { NKI_None, "<None>" },
25 { NKI_None, "CXXCtorInitializer" },
26 { NKI_None, "TemplateArgument" },
27 { NKI_None, "NestedNameSpecifier" },
28 { NKI_None, "NestedNameSpecifierLoc" },
29 { NKI_None, "QualType" },
30 { NKI_None, "TypeLoc" },
31 { NKI_None, "Decl" },
32 #define DECL(DERIVED, BASE) { NKI_##BASE, #DERIVED "Decl" },
33 #include "clang/AST/DeclNodes.inc"
34 { NKI_None, "Stmt" },
35 #define STMT(DERIVED, BASE) { NKI_##BASE, #DERIVED },
36 #include "clang/AST/StmtNodes.inc"
37 { NKI_None, "Type" },
38 #define TYPE(DERIVED, BASE) { NKI_##BASE, #DERIVED "Type" },
39 #include "clang/AST/TypeNodes.def"
40 };
41
isBaseOf(ASTNodeKind Other,unsigned * Distance) const42 bool ASTNodeKind::isBaseOf(ASTNodeKind Other, unsigned *Distance) const {
43 return isBaseOf(KindId, Other.KindId, Distance);
44 }
45
isSame(ASTNodeKind Other) const46 bool ASTNodeKind::isSame(ASTNodeKind Other) const {
47 return KindId != NKI_None && KindId == Other.KindId;
48 }
49
isBaseOf(NodeKindId Base,NodeKindId Derived,unsigned * Distance)50 bool ASTNodeKind::isBaseOf(NodeKindId Base, NodeKindId Derived,
51 unsigned *Distance) {
52 if (Base == NKI_None || Derived == NKI_None) return false;
53 unsigned Dist = 0;
54 while (Derived != Base && Derived != NKI_None) {
55 Derived = AllKindInfo[Derived].ParentId;
56 ++Dist;
57 }
58 if (Distance)
59 *Distance = Dist;
60 return Derived == Base;
61 }
62
asStringRef() const63 StringRef ASTNodeKind::asStringRef() const { return AllKindInfo[KindId].Name; }
64
getMostDerivedType(ASTNodeKind Kind1,ASTNodeKind Kind2)65 ASTNodeKind ASTNodeKind::getMostDerivedType(ASTNodeKind Kind1,
66 ASTNodeKind Kind2) {
67 if (Kind1.isBaseOf(Kind2)) return Kind2;
68 if (Kind2.isBaseOf(Kind1)) return Kind1;
69 return ASTNodeKind();
70 }
71
getMostDerivedCommonAncestor(ASTNodeKind Kind1,ASTNodeKind Kind2)72 ASTNodeKind ASTNodeKind::getMostDerivedCommonAncestor(ASTNodeKind Kind1,
73 ASTNodeKind Kind2) {
74 NodeKindId Parent = Kind1.KindId;
75 while (!isBaseOf(Parent, Kind2.KindId, nullptr) && Parent != NKI_None) {
76 Parent = AllKindInfo[Parent].ParentId;
77 }
78 return ASTNodeKind(Parent);
79 }
80
getFromNode(const Decl & D)81 ASTNodeKind ASTNodeKind::getFromNode(const Decl &D) {
82 switch (D.getKind()) {
83 #define DECL(DERIVED, BASE) \
84 case Decl::DERIVED: return ASTNodeKind(NKI_##DERIVED##Decl);
85 #define ABSTRACT_DECL(D)
86 #include "clang/AST/DeclNodes.inc"
87 };
88 llvm_unreachable("invalid decl kind");
89 }
90
getFromNode(const Stmt & S)91 ASTNodeKind ASTNodeKind::getFromNode(const Stmt &S) {
92 switch (S.getStmtClass()) {
93 case Stmt::NoStmtClass: return NKI_None;
94 #define STMT(CLASS, PARENT) \
95 case Stmt::CLASS##Class: return ASTNodeKind(NKI_##CLASS);
96 #define ABSTRACT_STMT(S)
97 #include "clang/AST/StmtNodes.inc"
98 }
99 llvm_unreachable("invalid stmt kind");
100 }
101
getFromNode(const Type & T)102 ASTNodeKind ASTNodeKind::getFromNode(const Type &T) {
103 switch (T.getTypeClass()) {
104 #define TYPE(Class, Base) \
105 case Type::Class: return ASTNodeKind(NKI_##Class##Type);
106 #define ABSTRACT_TYPE(Class, Base)
107 #include "clang/AST/TypeNodes.def"
108 }
109 llvm_unreachable("invalid type kind");
110 }
111
print(llvm::raw_ostream & OS,const PrintingPolicy & PP) const112 void DynTypedNode::print(llvm::raw_ostream &OS,
113 const PrintingPolicy &PP) const {
114 if (const TemplateArgument *TA = get<TemplateArgument>())
115 TA->print(PP, OS);
116 else if (const NestedNameSpecifier *NNS = get<NestedNameSpecifier>())
117 NNS->print(OS, PP);
118 else if (const NestedNameSpecifierLoc *NNSL = get<NestedNameSpecifierLoc>())
119 NNSL->getNestedNameSpecifier()->print(OS, PP);
120 else if (const QualType *QT = get<QualType>())
121 QT->print(OS, PP);
122 else if (const TypeLoc *TL = get<TypeLoc>())
123 TL->getType().print(OS, PP);
124 else if (const Decl *D = get<Decl>())
125 D->print(OS, PP);
126 else if (const Stmt *S = get<Stmt>())
127 S->printPretty(OS, nullptr, PP);
128 else if (const Type *T = get<Type>())
129 QualType(T, 0).print(OS, PP);
130 else
131 OS << "Unable to print values of type " << NodeKind.asStringRef() << "\n";
132 }
133
dump(llvm::raw_ostream & OS,SourceManager & SM) const134 void DynTypedNode::dump(llvm::raw_ostream &OS, SourceManager &SM) const {
135 if (const Decl *D = get<Decl>())
136 D->dump(OS);
137 else if (const Stmt *S = get<Stmt>())
138 S->dump(OS, SM);
139 else
140 OS << "Unable to dump values of type " << NodeKind.asStringRef() << "\n";
141 }
142
getSourceRange() const143 SourceRange DynTypedNode::getSourceRange() const {
144 if (const CXXCtorInitializer *CCI = get<CXXCtorInitializer>())
145 return CCI->getSourceRange();
146 if (const NestedNameSpecifierLoc *NNSL = get<NestedNameSpecifierLoc>())
147 return NNSL->getSourceRange();
148 if (const TypeLoc *TL = get<TypeLoc>())
149 return TL->getSourceRange();
150 if (const Decl *D = get<Decl>())
151 return D->getSourceRange();
152 if (const Stmt *S = get<Stmt>())
153 return S->getSourceRange();
154 return SourceRange();
155 }
156
157 } // end namespace ast_type_traits
158 } // end namespace clang
159