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
20namespace clang {
21namespace ast_type_traits {
22
23const 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
42bool ASTNodeKind::isBaseOf(ASTNodeKind Other, unsigned *Distance) const {
43  return isBaseOf(KindId, Other.KindId, Distance);
44}
45
46bool ASTNodeKind::isSame(ASTNodeKind Other) const {
47  return KindId != NKI_None && KindId == Other.KindId;
48}
49
50bool 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
63StringRef ASTNodeKind::asStringRef() const { return AllKindInfo[KindId].Name; }
64
65ASTNodeKind 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
72ASTNodeKind 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
81ASTNodeKind 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
91ASTNodeKind 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
102ASTNodeKind 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
112void 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
134void 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
143SourceRange 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