CXType.cpp revision 3f59c975aa5d047f7edd1b900b5e885c38af0ef7 
1//===- CXTypes.cpp - Implements 'CXTypes' aspect of libclang ------------===//
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// This file implements the 'CXTypes' API hooks in the Clang-C library.
11//
12//===--------------------------------------------------------------------===//
13
14#include "CIndexer.h"
15#include "CXTranslationUnit.h"
16#include "CXCursor.h"
17#include "CXString.h"
18#include "CXType.h"
19#include "clang/AST/Expr.h"
20#include "clang/AST/Type.h"
21#include "clang/AST/Decl.h"
22#include "clang/AST/DeclObjC.h"
23#include "clang/AST/DeclTemplate.h"
24#include "clang/Frontend/ASTUnit.h"
25
26using namespace clang;
27
28static CXTypeKind GetBuiltinTypeKind(const BuiltinType *BT) {
29#define BTCASE(K) case BuiltinType::K: return CXType_##K
30  switch (BT->getKind()) {
31    BTCASE(Void);
32    BTCASE(Bool);
33    BTCASE(Char_U);
34    BTCASE(UChar);
35    BTCASE(Char16);
36    BTCASE(Char32);
37    BTCASE(UShort);
38    BTCASE(UInt);
39    BTCASE(ULong);
40    BTCASE(ULongLong);
41    BTCASE(UInt128);
42    BTCASE(Char_S);
43    BTCASE(SChar);
44    case BuiltinType::WChar_S: return CXType_WChar;
45    case BuiltinType::WChar_U: return CXType_WChar;
46    BTCASE(Short);
47    BTCASE(Int);
48    BTCASE(Long);
49    BTCASE(LongLong);
50    BTCASE(Int128);
51    BTCASE(Float);
52    BTCASE(Double);
53    BTCASE(LongDouble);
54    BTCASE(NullPtr);
55    BTCASE(Overload);
56    BTCASE(Dependent);
57    BTCASE(ObjCId);
58    BTCASE(ObjCClass);
59    BTCASE(ObjCSel);
60  default:
61    return CXType_Unexposed;
62  }
63#undef BTCASE
64}
65
66static CXTypeKind GetTypeKind(QualType T) {
67  Type *TP = T.getTypePtrOrNull();
68  if (!TP)
69    return CXType_Invalid;
70
71#define TKCASE(K) case Type::K: return CXType_##K
72  switch (TP->getTypeClass()) {
73    case Type::Builtin:
74      return GetBuiltinTypeKind(cast<BuiltinType>(TP));
75    TKCASE(Complex);
76    TKCASE(Pointer);
77    TKCASE(BlockPointer);
78    TKCASE(LValueReference);
79    TKCASE(RValueReference);
80    TKCASE(Record);
81    TKCASE(Enum);
82    TKCASE(Typedef);
83    TKCASE(ObjCInterface);
84    TKCASE(ObjCObjectPointer);
85    TKCASE(FunctionNoProto);
86    TKCASE(FunctionProto);
87    default:
88      return CXType_Unexposed;
89  }
90#undef TKCASE
91}
92
93
94CXType cxtype::MakeCXType(QualType T, CXTranslationUnit TU) {
95  CXTypeKind TK = GetTypeKind(T);
96  CXType CT = { TK, { TK == CXType_Invalid ? 0 : T.getAsOpaquePtr(), TU }};
97  return CT;
98}
99
100using cxtype::MakeCXType;
101
102static inline QualType GetQualType(CXType CT) {
103  return QualType::getFromOpaquePtr(CT.data[0]);
104}
105
106static inline CXTranslationUnit GetTU(CXType CT) {
107  return static_cast<CXTranslationUnit>(CT.data[1]);
108}
109
110extern "C" {
111
112CXType clang_getCursorType(CXCursor C) {
113  using namespace cxcursor;
114
115  CXTranslationUnit TU = cxcursor::getCursorTU(C);
116  if (clang_isExpression(C.kind)) {
117    QualType T = cxcursor::getCursorExpr(C)->getType();
118    return MakeCXType(T, TU);
119  }
120
121  if (clang_isDeclaration(C.kind)) {
122    Decl *D = cxcursor::getCursorDecl(C);
123
124    if (TypeDecl *TD = dyn_cast<TypeDecl>(D))
125      return MakeCXType(QualType(TD->getTypeForDecl(), 0), TU);
126    if (ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(D))
127      return MakeCXType(QualType(ID->getTypeForDecl(), 0), TU);
128    if (ValueDecl *VD = dyn_cast<ValueDecl>(D))
129      return MakeCXType(VD->getType(), TU);
130    if (ObjCPropertyDecl *PD = dyn_cast<ObjCPropertyDecl>(D))
131      return MakeCXType(PD->getType(), TU);
132    if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D))
133      return MakeCXType(FD->getType(), TU);
134    return MakeCXType(QualType(), TU);
135  }
136
137  if (clang_isReference(C.kind)) {
138    switch (C.kind) {
139    case CXCursor_ObjCSuperClassRef:
140      return MakeCXType(
141                QualType(getCursorObjCSuperClassRef(C).first->getTypeForDecl(),
142                         0),
143                        TU);
144
145    case CXCursor_ObjCClassRef:
146      return MakeCXType(
147                      QualType(getCursorObjCClassRef(C).first->getTypeForDecl(),
148                               0),
149                        TU);
150
151    case CXCursor_TypeRef:
152      return MakeCXType(QualType(getCursorTypeRef(C).first->getTypeForDecl(),
153                                 0),
154                        TU);
155
156    case CXCursor_CXXBaseSpecifier:
157      return cxtype::MakeCXType(getCursorCXXBaseSpecifier(C)->getType(), TU);
158
159    case CXCursor_ObjCProtocolRef:
160    case CXCursor_TemplateRef:
161    case CXCursor_NamespaceRef:
162    case CXCursor_MemberRef:
163    case CXCursor_OverloadedDeclRef:
164    default:
165      break;
166    }
167
168    return MakeCXType(QualType(), TU);
169  }
170
171  return MakeCXType(QualType(), TU);
172}
173
174CXType clang_getCanonicalType(CXType CT) {
175  if (CT.kind == CXType_Invalid)
176    return CT;
177
178  QualType T = GetQualType(CT);
179  CXTranslationUnit TU = GetTU(CT);
180
181  if (T.isNull())
182    return MakeCXType(QualType(), GetTU(CT));
183
184  ASTUnit *AU = static_cast<ASTUnit*>(TU->TUData);
185  return MakeCXType(AU->getASTContext().getCanonicalType(T), TU);
186}
187
188CXType clang_getPointeeType(CXType CT) {
189  QualType T = GetQualType(CT);
190  Type *TP = T.getTypePtrOrNull();
191
192  if (!TP)
193    return MakeCXType(QualType(), GetTU(CT));
194
195  switch (TP->getTypeClass()) {
196    case Type::Pointer:
197      T = cast<PointerType>(TP)->getPointeeType();
198      break;
199    case Type::BlockPointer:
200      T = cast<BlockPointerType>(TP)->getPointeeType();
201      break;
202    case Type::LValueReference:
203    case Type::RValueReference:
204      T = cast<ReferenceType>(TP)->getPointeeType();
205      break;
206    case Type::ObjCObjectPointer:
207      T = cast<ObjCObjectPointerType>(TP)->getPointeeType();
208      break;
209    default:
210      T = QualType();
211      break;
212  }
213  return MakeCXType(T, GetTU(CT));
214}
215
216CXCursor clang_getTypeDeclaration(CXType CT) {
217  if (CT.kind == CXType_Invalid)
218    return cxcursor::MakeCXCursorInvalid(CXCursor_NoDeclFound);
219
220  QualType T = GetQualType(CT);
221  Type *TP = T.getTypePtrOrNull();
222
223  if (!TP)
224    return cxcursor::MakeCXCursorInvalid(CXCursor_NoDeclFound);
225
226  Decl *D = 0;
227
228try_again:
229  switch (TP->getTypeClass()) {
230  case Type::Typedef:
231    D = cast<TypedefType>(TP)->getDecl();
232    break;
233  case Type::ObjCObject:
234    D = cast<ObjCObjectType>(TP)->getInterface();
235    break;
236  case Type::ObjCInterface:
237    D = cast<ObjCInterfaceType>(TP)->getDecl();
238    break;
239  case Type::Record:
240  case Type::Enum:
241    D = cast<TagType>(TP)->getDecl();
242    break;
243  case Type::TemplateSpecialization:
244    if (const RecordType *Record = TP->getAs<RecordType>())
245      D = Record->getDecl();
246    else
247      D = cast<TemplateSpecializationType>(TP)->getTemplateName()
248                                                         .getAsTemplateDecl();
249    break;
250
251  case Type::InjectedClassName:
252    D = cast<InjectedClassNameType>(TP)->getDecl();
253    break;
254
255  // FIXME: Template type parameters!
256
257  case Type::Elaborated:
258    TP = cast<ElaboratedType>(TP)->getNamedType().getTypePtrOrNull();
259    goto try_again;
260
261  default:
262    break;
263  }
264
265  if (!D)
266    return cxcursor::MakeCXCursorInvalid(CXCursor_NoDeclFound);
267
268  return cxcursor::MakeCXCursor(D, GetTU(CT));
269}
270
271CXString clang_getTypeKindSpelling(enum CXTypeKind K) {
272  const char *s = 0;
273#define TKIND(X) case CXType_##X: s = ""  #X  ""; break
274  switch (K) {
275    TKIND(Invalid);
276    TKIND(Unexposed);
277    TKIND(Void);
278    TKIND(Bool);
279    TKIND(Char_U);
280    TKIND(UChar);
281    TKIND(Char16);
282    TKIND(Char32);
283    TKIND(UShort);
284    TKIND(UInt);
285    TKIND(ULong);
286    TKIND(ULongLong);
287    TKIND(UInt128);
288    TKIND(Char_S);
289    TKIND(SChar);
290    case CXType_WChar: s = "WChar"; break;
291    TKIND(Short);
292    TKIND(Int);
293    TKIND(Long);
294    TKIND(LongLong);
295    TKIND(Int128);
296    TKIND(Float);
297    TKIND(Double);
298    TKIND(LongDouble);
299    TKIND(NullPtr);
300    TKIND(Overload);
301    TKIND(Dependent);
302    TKIND(ObjCId);
303    TKIND(ObjCClass);
304    TKIND(ObjCSel);
305    TKIND(Complex);
306    TKIND(Pointer);
307    TKIND(BlockPointer);
308    TKIND(LValueReference);
309    TKIND(RValueReference);
310    TKIND(Record);
311    TKIND(Enum);
312    TKIND(Typedef);
313    TKIND(ObjCInterface);
314    TKIND(ObjCObjectPointer);
315    TKIND(FunctionNoProto);
316    TKIND(FunctionProto);
317  }
318#undef TKIND
319  return cxstring::createCXString(s);
320}
321
322unsigned clang_equalTypes(CXType A, CXType B) {
323  return A.data[0] == B.data[0] && A.data[1] == B.data[1];;
324}
325
326CXType clang_getResultType(CXType X) {
327  QualType T = GetQualType(X);
328  if (!T.getTypePtrOrNull())
329    return MakeCXType(QualType(), GetTU(X));
330
331  if (const FunctionType *FD = T->getAs<FunctionType>())
332    return MakeCXType(FD->getResultType(), GetTU(X));
333
334  return MakeCXType(QualType(), GetTU(X));
335}
336
337CXType clang_getCursorResultType(CXCursor C) {
338  if (clang_isDeclaration(C.kind)) {
339    Decl *D = cxcursor::getCursorDecl(C);
340    if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(D))
341      return MakeCXType(MD->getResultType(), cxcursor::getCursorTU(C));
342
343    return clang_getResultType(clang_getCursorType(C));
344  }
345
346  return MakeCXType(QualType(), cxcursor::getCursorTU(C));
347}
348
349unsigned clang_isPODType(CXType X) {
350  QualType T = GetQualType(X);
351  if (!T.getTypePtrOrNull())
352    return 0;
353  return T->isPODType() ? 1 : 0;
354}
355
356} // end: extern "C"
357