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, "TemplateArgument" },
26 { NKI_None, "NestedNameSpecifierLoc" },
27 { NKI_None, "QualType" },
28 { NKI_None, "TypeLoc" },
29 { NKI_None, "CXXCtorInitializer" },
30 { NKI_None, "NestedNameSpecifier" },
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
isBaseOf(NodeKindId Base,NodeKindId Derived,unsigned * Distance)46 bool ASTNodeKind::isBaseOf(NodeKindId Base, NodeKindId Derived,
47 unsigned *Distance) {
48 if (Base == NKI_None || Derived == NKI_None) return false;
49 unsigned Dist = 0;
50 while (Derived != Base && Derived != NKI_None) {
51 Derived = AllKindInfo[Derived].ParentId;
52 ++Dist;
53 }
54 if (Distance)
55 *Distance = Dist;
56 return Derived == Base;
57 }
58
asStringRef() const59 StringRef ASTNodeKind::asStringRef() const { return AllKindInfo[KindId].Name; }
60
getMostDerivedType(ASTNodeKind Kind1,ASTNodeKind Kind2)61 ASTNodeKind ASTNodeKind::getMostDerivedType(ASTNodeKind Kind1,
62 ASTNodeKind Kind2) {
63 if (Kind1.isBaseOf(Kind2)) return Kind2;
64 if (Kind2.isBaseOf(Kind1)) return Kind1;
65 return ASTNodeKind();
66 }
67
getMostDerivedCommonAncestor(ASTNodeKind Kind1,ASTNodeKind Kind2)68 ASTNodeKind ASTNodeKind::getMostDerivedCommonAncestor(ASTNodeKind Kind1,
69 ASTNodeKind Kind2) {
70 NodeKindId Parent = Kind1.KindId;
71 while (!isBaseOf(Parent, Kind2.KindId, nullptr) && Parent != NKI_None) {
72 Parent = AllKindInfo[Parent].ParentId;
73 }
74 return ASTNodeKind(Parent);
75 }
76
getFromNode(const Decl & D)77 ASTNodeKind ASTNodeKind::getFromNode(const Decl &D) {
78 switch (D.getKind()) {
79 #define DECL(DERIVED, BASE) \
80 case Decl::DERIVED: return ASTNodeKind(NKI_##DERIVED##Decl);
81 #define ABSTRACT_DECL(D)
82 #include "clang/AST/DeclNodes.inc"
83 };
84 llvm_unreachable("invalid decl kind");
85 }
86
getFromNode(const Stmt & S)87 ASTNodeKind ASTNodeKind::getFromNode(const Stmt &S) {
88 switch (S.getStmtClass()) {
89 case Stmt::NoStmtClass: return NKI_None;
90 #define STMT(CLASS, PARENT) \
91 case Stmt::CLASS##Class: return ASTNodeKind(NKI_##CLASS);
92 #define ABSTRACT_STMT(S)
93 #include "clang/AST/StmtNodes.inc"
94 }
95 llvm_unreachable("invalid stmt kind");
96 }
97
getFromNode(const Type & T)98 ASTNodeKind ASTNodeKind::getFromNode(const Type &T) {
99 switch (T.getTypeClass()) {
100 #define TYPE(Class, Base) \
101 case Type::Class: return ASTNodeKind(NKI_##Class##Type);
102 #define ABSTRACT_TYPE(Class, Base)
103 #include "clang/AST/TypeNodes.def"
104 }
105 llvm_unreachable("invalid type kind");
106 }
107
print(llvm::raw_ostream & OS,const PrintingPolicy & PP) const108 void DynTypedNode::print(llvm::raw_ostream &OS,
109 const PrintingPolicy &PP) const {
110 if (const TemplateArgument *TA = get<TemplateArgument>())
111 TA->print(PP, OS);
112 else if (const NestedNameSpecifier *NNS = get<NestedNameSpecifier>())
113 NNS->print(OS, PP);
114 else if (const NestedNameSpecifierLoc *NNSL = get<NestedNameSpecifierLoc>())
115 NNSL->getNestedNameSpecifier()->print(OS, PP);
116 else if (const QualType *QT = get<QualType>())
117 QT->print(OS, PP);
118 else if (const TypeLoc *TL = get<TypeLoc>())
119 TL->getType().print(OS, PP);
120 else if (const Decl *D = get<Decl>())
121 D->print(OS, PP);
122 else if (const Stmt *S = get<Stmt>())
123 S->printPretty(OS, nullptr, PP);
124 else if (const Type *T = get<Type>())
125 QualType(T, 0).print(OS, PP);
126 else
127 OS << "Unable to print values of type " << NodeKind.asStringRef() << "\n";
128 }
129
dump(llvm::raw_ostream & OS,SourceManager & SM) const130 void DynTypedNode::dump(llvm::raw_ostream &OS, SourceManager &SM) const {
131 if (const Decl *D = get<Decl>())
132 D->dump(OS);
133 else if (const Stmt *S = get<Stmt>())
134 S->dump(OS, SM);
135 else
136 OS << "Unable to dump values of type " << NodeKind.asStringRef() << "\n";
137 }
138
getSourceRange() const139 SourceRange DynTypedNode::getSourceRange() const {
140 if (const CXXCtorInitializer *CCI = get<CXXCtorInitializer>())
141 return CCI->getSourceRange();
142 if (const NestedNameSpecifierLoc *NNSL = get<NestedNameSpecifierLoc>())
143 return NNSL->getSourceRange();
144 if (const TypeLoc *TL = get<TypeLoc>())
145 return TL->getSourceRange();
146 if (const Decl *D = get<Decl>())
147 return D->getSourceRange();
148 if (const Stmt *S = get<Stmt>())
149 return S->getSourceRange();
150 return SourceRange();
151 }
152
153 } // end namespace ast_type_traits
154 } // end namespace clang
155