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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 
print(llvm::raw_ostream & OS,const PrintingPolicy & PP) const65 void DynTypedNode::print(llvm::raw_ostream &OS,
66                          const PrintingPolicy &PP) const {
67   if (const TemplateArgument *TA = get<TemplateArgument>())
68     TA->print(PP, OS);
69   else if (const NestedNameSpecifier *NNS = get<NestedNameSpecifier>())
70     NNS->print(OS, PP);
71   else if (const NestedNameSpecifierLoc *NNSL = get<NestedNameSpecifierLoc>())
72     NNSL->getNestedNameSpecifier()->print(OS, PP);
73   else if (const QualType *QT = get<QualType>())
74     QT->print(OS, PP);
75   else if (const TypeLoc *TL = get<TypeLoc>())
76     TL->getType().print(OS, PP);
77   else if (const Decl *D = get<Decl>())
78     D->print(OS, PP);
79   else if (const Stmt *S = get<Stmt>())
80     S->printPretty(OS, nullptr, PP);
81   else if (const Type *T = get<Type>())
82     QualType(T, 0).print(OS, PP);
83   else
84     OS << "Unable to print values of type " << NodeKind.asStringRef() << "\n";
85 }
86 
dump(llvm::raw_ostream & OS,SourceManager & SM) const87 void DynTypedNode::dump(llvm::raw_ostream &OS, SourceManager &SM) const {
88   if (const Decl *D = get<Decl>())
89     D->dump(OS);
90   else if (const Stmt *S = get<Stmt>())
91     S->dump(OS, SM);
92   else
93     OS << "Unable to dump values of type " << NodeKind.asStringRef() << "\n";
94 }
95 
getSourceRange() const96 SourceRange DynTypedNode::getSourceRange() const {
97   if (const CXXCtorInitializer *CCI = get<CXXCtorInitializer>())
98     return CCI->getSourceRange();
99   if (const NestedNameSpecifierLoc *NNSL = get<NestedNameSpecifierLoc>())
100     return NNSL->getSourceRange();
101   if (const TypeLoc *TL = get<TypeLoc>())
102     return TL->getSourceRange();
103   if (const Decl *D = get<Decl>())
104     return D->getSourceRange();
105   if (const Stmt *S = get<Stmt>())
106     return S->getSourceRange();
107   return SourceRange();
108 }
109 
110 } // end namespace ast_type_traits
111 } // end namespace clang
112