xref: /llvm-project/clang/tools/libclang/CXCursor.cpp (revision 5518a9d7673bfe55b4110bea049140316d032fbf) 
1 //===- CXCursor.cpp - Routines for manipulating CXCursors -----------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file defines routines for manipulating CXCursors. It should be the
10 // only file that has internal knowledge of the encoding of the data in
11 // CXCursor.
12 //
13 //===----------------------------------------------------------------------===//
14 
15 #include "CXCursor.h"
16 #include "CXString.h"
17 #include "CXTranslationUnit.h"
18 #include "CXType.h"
19 #include "clang-c/Index.h"
20 #include "clang/AST/Attr.h"
21 #include "clang/AST/Decl.h"
22 #include "clang/AST/DeclCXX.h"
23 #include "clang/AST/DeclObjC.h"
24 #include "clang/AST/DeclTemplate.h"
25 #include "clang/AST/Expr.h"
26 #include "clang/AST/ExprCXX.h"
27 #include "clang/AST/ExprObjC.h"
28 #include "clang/Frontend/ASTUnit.h"
29 #include "llvm/Support/ErrorHandling.h"
30 
31 using namespace clang;
32 using namespace cxcursor;
33 
34 CXCursor cxcursor::MakeCXCursorInvalid(CXCursorKind K, CXTranslationUnit TU) {
35   assert(K >= CXCursor_FirstInvalid && K <= CXCursor_LastInvalid);
36   CXCursor C = {K, 0, {nullptr, nullptr, TU}};
37   return C;
38 }
39 
40 static CXCursorKind GetCursorKind(const Attr *A) {
41   assert(A && "Invalid arguments!");
42   switch (A->getKind()) {
43   default:
44     break;
45   case attr::IBAction:
46     return CXCursor_IBActionAttr;
47   case attr::IBOutlet:
48     return CXCursor_IBOutletAttr;
49   case attr::IBOutletCollection:
50     return CXCursor_IBOutletCollectionAttr;
51   case attr::Final:
52     return CXCursor_CXXFinalAttr;
53   case attr::Override:
54     return CXCursor_CXXOverrideAttr;
55   case attr::Annotate:
56     return CXCursor_AnnotateAttr;
57   case attr::AsmLabel:
58     return CXCursor_AsmLabelAttr;
59   case attr::Packed:
60     return CXCursor_PackedAttr;
61   case attr::Pure:
62     return CXCursor_PureAttr;
63   case attr::Const:
64     return CXCursor_ConstAttr;
65   case attr::NoDuplicate:
66     return CXCursor_NoDuplicateAttr;
67   case attr::CUDAConstant:
68     return CXCursor_CUDAConstantAttr;
69   case attr::CUDADevice:
70     return CXCursor_CUDADeviceAttr;
71   case attr::CUDAGlobal:
72     return CXCursor_CUDAGlobalAttr;
73   case attr::CUDAHost:
74     return CXCursor_CUDAHostAttr;
75   case attr::CUDAShared:
76     return CXCursor_CUDASharedAttr;
77   case attr::Visibility:
78     return CXCursor_VisibilityAttr;
79   case attr::DLLExport:
80     return CXCursor_DLLExport;
81   case attr::DLLImport:
82     return CXCursor_DLLImport;
83   case attr::NSReturnsRetained:
84     return CXCursor_NSReturnsRetained;
85   case attr::NSReturnsNotRetained:
86     return CXCursor_NSReturnsNotRetained;
87   case attr::NSReturnsAutoreleased:
88     return CXCursor_NSReturnsAutoreleased;
89   case attr::NSConsumesSelf:
90     return CXCursor_NSConsumesSelf;
91   case attr::NSConsumed:
92     return CXCursor_NSConsumed;
93   case attr::ObjCException:
94     return CXCursor_ObjCException;
95   case attr::ObjCNSObject:
96     return CXCursor_ObjCNSObject;
97   case attr::ObjCIndependentClass:
98     return CXCursor_ObjCIndependentClass;
99   case attr::ObjCPreciseLifetime:
100     return CXCursor_ObjCPreciseLifetime;
101   case attr::ObjCReturnsInnerPointer:
102     return CXCursor_ObjCReturnsInnerPointer;
103   case attr::ObjCRequiresSuper:
104     return CXCursor_ObjCRequiresSuper;
105   case attr::ObjCRootClass:
106     return CXCursor_ObjCRootClass;
107   case attr::ObjCSubclassingRestricted:
108     return CXCursor_ObjCSubclassingRestricted;
109   case attr::ObjCExplicitProtocolImpl:
110     return CXCursor_ObjCExplicitProtocolImpl;
111   case attr::ObjCDesignatedInitializer:
112     return CXCursor_ObjCDesignatedInitializer;
113   case attr::ObjCRuntimeVisible:
114     return CXCursor_ObjCRuntimeVisible;
115   case attr::ObjCBoxable:
116     return CXCursor_ObjCBoxable;
117   case attr::FlagEnum:
118     return CXCursor_FlagEnum;
119   case attr::Convergent:
120     return CXCursor_ConvergentAttr;
121   case attr::WarnUnused:
122     return CXCursor_WarnUnusedAttr;
123   case attr::WarnUnusedResult:
124     return CXCursor_WarnUnusedResultAttr;
125   case attr::Aligned:
126     return CXCursor_AlignedAttr;
127   }
128 
129   return CXCursor_UnexposedAttr;
130 }
131 
132 CXCursor cxcursor::MakeCXCursor(const Attr *A, const Decl *Parent,
133                                 CXTranslationUnit TU) {
134   assert(A && Parent && TU && "Invalid arguments!");
135   CXCursor C = {GetCursorKind(A), 0, {Parent, A, TU}};
136   return C;
137 }
138 
139 CXCursor cxcursor::MakeCXCursor(const Decl *D, CXTranslationUnit TU,
140                                 SourceRange RegionOfInterest,
141                                 bool FirstInDeclGroup) {
142   assert(D && TU && "Invalid arguments!");
143 
144   CXCursorKind K = getCursorKindForDecl(D);
145 
146   if (K == CXCursor_ObjCClassMethodDecl ||
147       K == CXCursor_ObjCInstanceMethodDecl) {
148     int SelectorIdIndex = -1;
149     // Check if cursor points to a selector id.
150     if (RegionOfInterest.isValid() &&
151         RegionOfInterest.getBegin() == RegionOfInterest.getEnd()) {
152       SmallVector<SourceLocation, 16> SelLocs;
153       cast<ObjCMethodDecl>(D)->getSelectorLocs(SelLocs);
154       SmallVectorImpl<SourceLocation>::iterator I =
155           llvm::find(SelLocs, RegionOfInterest.getBegin());
156       if (I != SelLocs.end())
157         SelectorIdIndex = I - SelLocs.begin();
158     }
159     CXCursor C = {K,
160                   SelectorIdIndex,
161                   {D, (void *)(intptr_t)(FirstInDeclGroup ? 1 : 0), TU}};
162     return C;
163   }
164 
165   CXCursor C = {K, 0, {D, (void *)(intptr_t)(FirstInDeclGroup ? 1 : 0), TU}};
166   return C;
167 }
168 
169 CXCursor cxcursor::MakeCXCursor(const Stmt *S, const Decl *Parent,
170                                 CXTranslationUnit TU,
171                                 SourceRange RegionOfInterest) {
172   assert(S && TU && "Invalid arguments!");
173   CXCursorKind K = CXCursor_NotImplemented;
174 
175   switch (S->getStmtClass()) {
176   case Stmt::NoStmtClass:
177     break;
178 
179   case Stmt::CaseStmtClass:
180     K = CXCursor_CaseStmt;
181     break;
182 
183   case Stmt::DefaultStmtClass:
184     K = CXCursor_DefaultStmt;
185     break;
186 
187   case Stmt::IfStmtClass:
188     K = CXCursor_IfStmt;
189     break;
190 
191   case Stmt::SwitchStmtClass:
192     K = CXCursor_SwitchStmt;
193     break;
194 
195   case Stmt::WhileStmtClass:
196     K = CXCursor_WhileStmt;
197     break;
198 
199   case Stmt::DoStmtClass:
200     K = CXCursor_DoStmt;
201     break;
202 
203   case Stmt::ForStmtClass:
204     K = CXCursor_ForStmt;
205     break;
206 
207   case Stmt::GotoStmtClass:
208     K = CXCursor_GotoStmt;
209     break;
210 
211   case Stmt::IndirectGotoStmtClass:
212     K = CXCursor_IndirectGotoStmt;
213     break;
214 
215   case Stmt::ContinueStmtClass:
216     K = CXCursor_ContinueStmt;
217     break;
218 
219   case Stmt::BreakStmtClass:
220     K = CXCursor_BreakStmt;
221     break;
222 
223   case Stmt::ReturnStmtClass:
224     K = CXCursor_ReturnStmt;
225     break;
226 
227   case Stmt::GCCAsmStmtClass:
228     K = CXCursor_GCCAsmStmt;
229     break;
230 
231   case Stmt::MSAsmStmtClass:
232     K = CXCursor_MSAsmStmt;
233     break;
234 
235   case Stmt::ObjCAtTryStmtClass:
236     K = CXCursor_ObjCAtTryStmt;
237     break;
238 
239   case Stmt::ObjCAtCatchStmtClass:
240     K = CXCursor_ObjCAtCatchStmt;
241     break;
242 
243   case Stmt::ObjCAtFinallyStmtClass:
244     K = CXCursor_ObjCAtFinallyStmt;
245     break;
246 
247   case Stmt::ObjCAtThrowStmtClass:
248     K = CXCursor_ObjCAtThrowStmt;
249     break;
250 
251   case Stmt::ObjCAtSynchronizedStmtClass:
252     K = CXCursor_ObjCAtSynchronizedStmt;
253     break;
254 
255   case Stmt::ObjCAutoreleasePoolStmtClass:
256     K = CXCursor_ObjCAutoreleasePoolStmt;
257     break;
258 
259   case Stmt::ObjCForCollectionStmtClass:
260     K = CXCursor_ObjCForCollectionStmt;
261     break;
262 
263   case Stmt::CXXCatchStmtClass:
264     K = CXCursor_CXXCatchStmt;
265     break;
266 
267   case Stmt::CXXTryStmtClass:
268     K = CXCursor_CXXTryStmt;
269     break;
270 
271   case Stmt::CXXForRangeStmtClass:
272     K = CXCursor_CXXForRangeStmt;
273     break;
274 
275   case Stmt::SEHTryStmtClass:
276     K = CXCursor_SEHTryStmt;
277     break;
278 
279   case Stmt::SEHExceptStmtClass:
280     K = CXCursor_SEHExceptStmt;
281     break;
282 
283   case Stmt::SEHFinallyStmtClass:
284     K = CXCursor_SEHFinallyStmt;
285     break;
286 
287   case Stmt::SEHLeaveStmtClass:
288     K = CXCursor_SEHLeaveStmt;
289     break;
290 
291   case Stmt::CoroutineBodyStmtClass:
292   case Stmt::CoreturnStmtClass:
293     K = CXCursor_UnexposedStmt;
294     break;
295 
296   case Stmt::ArrayTypeTraitExprClass:
297   case Stmt::AsTypeExprClass:
298   case Stmt::AtomicExprClass:
299   case Stmt::BinaryConditionalOperatorClass:
300   case Stmt::TypeTraitExprClass:
301   case Stmt::CoawaitExprClass:
302   case Stmt::DependentCoawaitExprClass:
303   case Stmt::CoyieldExprClass:
304   case Stmt::CXXBindTemporaryExprClass:
305   case Stmt::CXXDefaultArgExprClass:
306   case Stmt::CXXDefaultInitExprClass:
307   case Stmt::CXXFoldExprClass:
308   case Stmt::CXXRewrittenBinaryOperatorClass:
309   case Stmt::CXXStdInitializerListExprClass:
310   case Stmt::CXXScalarValueInitExprClass:
311   case Stmt::CXXUuidofExprClass:
312   case Stmt::ChooseExprClass:
313   case Stmt::DesignatedInitExprClass:
314   case Stmt::DesignatedInitUpdateExprClass:
315   case Stmt::ArrayInitLoopExprClass:
316   case Stmt::ArrayInitIndexExprClass:
317   case Stmt::ExprWithCleanupsClass:
318   case Stmt::ExpressionTraitExprClass:
319   case Stmt::ExtVectorElementExprClass:
320   case Stmt::ImplicitCastExprClass:
321   case Stmt::ImplicitValueInitExprClass:
322   case Stmt::NoInitExprClass:
323   case Stmt::MaterializeTemporaryExprClass:
324   case Stmt::ObjCIndirectCopyRestoreExprClass:
325   case Stmt::OffsetOfExprClass:
326   case Stmt::ParenListExprClass:
327   case Stmt::PredefinedExprClass:
328   case Stmt::ShuffleVectorExprClass:
329   case Stmt::SourceLocExprClass:
330   case Stmt::ConvertVectorExprClass:
331   case Stmt::VAArgExprClass:
332   case Stmt::ObjCArrayLiteralClass:
333   case Stmt::ObjCDictionaryLiteralClass:
334   case Stmt::ObjCBoxedExprClass:
335   case Stmt::ObjCSubscriptRefExprClass:
336   case Stmt::RecoveryExprClass:
337   case Stmt::SYCLUniqueStableNameExprClass:
338     K = CXCursor_UnexposedExpr;
339     break;
340 
341   case Stmt::OpaqueValueExprClass:
342     if (Expr *Src = cast<OpaqueValueExpr>(S)->getSourceExpr())
343       return MakeCXCursor(Src, Parent, TU, RegionOfInterest);
344     K = CXCursor_UnexposedExpr;
345     break;
346 
347   case Stmt::PseudoObjectExprClass:
348     return MakeCXCursor(cast<PseudoObjectExpr>(S)->getSyntacticForm(), Parent,
349                         TU, RegionOfInterest);
350 
351   case Stmt::CompoundStmtClass:
352     K = CXCursor_CompoundStmt;
353     break;
354 
355   case Stmt::NullStmtClass:
356     K = CXCursor_NullStmt;
357     break;
358 
359   case Stmt::LabelStmtClass:
360     K = CXCursor_LabelStmt;
361     break;
362 
363   case Stmt::AttributedStmtClass:
364     K = CXCursor_UnexposedStmt;
365     break;
366 
367   case Stmt::DeclStmtClass:
368     K = CXCursor_DeclStmt;
369     break;
370 
371   case Stmt::CapturedStmtClass:
372     K = CXCursor_UnexposedStmt;
373     break;
374 
375   case Stmt::IntegerLiteralClass:
376     K = CXCursor_IntegerLiteral;
377     break;
378 
379   case Stmt::FixedPointLiteralClass:
380     K = CXCursor_FixedPointLiteral;
381     break;
382 
383   case Stmt::FloatingLiteralClass:
384     K = CXCursor_FloatingLiteral;
385     break;
386 
387   case Stmt::ImaginaryLiteralClass:
388     K = CXCursor_ImaginaryLiteral;
389     break;
390 
391   case Stmt::StringLiteralClass:
392     K = CXCursor_StringLiteral;
393     break;
394 
395   case Stmt::CharacterLiteralClass:
396     K = CXCursor_CharacterLiteral;
397     break;
398 
399   case Stmt::ConstantExprClass:
400     return MakeCXCursor(cast<ConstantExpr>(S)->getSubExpr(), Parent, TU,
401                         RegionOfInterest);
402 
403   case Stmt::ParenExprClass:
404     K = CXCursor_ParenExpr;
405     break;
406 
407   case Stmt::UnaryOperatorClass:
408     K = CXCursor_UnaryOperator;
409     break;
410 
411   case Stmt::UnaryExprOrTypeTraitExprClass:
412   case Stmt::CXXNoexceptExprClass:
413     K = CXCursor_UnaryExpr;
414     break;
415 
416   case Stmt::MSPropertySubscriptExprClass:
417   case Stmt::ArraySubscriptExprClass:
418     K = CXCursor_ArraySubscriptExpr;
419     break;
420 
421   case Stmt::MatrixSubscriptExprClass:
422     // TODO: add support for MatrixSubscriptExpr.
423     K = CXCursor_UnexposedExpr;
424     break;
425 
426   case Stmt::OMPArraySectionExprClass:
427     K = CXCursor_OMPArraySectionExpr;
428     break;
429 
430   case Stmt::OMPArrayShapingExprClass:
431     K = CXCursor_OMPArrayShapingExpr;
432     break;
433 
434   case Stmt::OMPIteratorExprClass:
435     K = CXCursor_OMPIteratorExpr;
436     break;
437 
438   case Stmt::BinaryOperatorClass:
439     K = CXCursor_BinaryOperator;
440     break;
441 
442   case Stmt::CompoundAssignOperatorClass:
443     K = CXCursor_CompoundAssignOperator;
444     break;
445 
446   case Stmt::ConditionalOperatorClass:
447     K = CXCursor_ConditionalOperator;
448     break;
449 
450   case Stmt::CStyleCastExprClass:
451     K = CXCursor_CStyleCastExpr;
452     break;
453 
454   case Stmt::CompoundLiteralExprClass:
455     K = CXCursor_CompoundLiteralExpr;
456     break;
457 
458   case Stmt::InitListExprClass:
459     K = CXCursor_InitListExpr;
460     break;
461 
462   case Stmt::AddrLabelExprClass:
463     K = CXCursor_AddrLabelExpr;
464     break;
465 
466   case Stmt::StmtExprClass:
467     K = CXCursor_StmtExpr;
468     break;
469 
470   case Stmt::GenericSelectionExprClass:
471     K = CXCursor_GenericSelectionExpr;
472     break;
473 
474   case Stmt::GNUNullExprClass:
475     K = CXCursor_GNUNullExpr;
476     break;
477 
478   case Stmt::CXXStaticCastExprClass:
479     K = CXCursor_CXXStaticCastExpr;
480     break;
481 
482   case Stmt::CXXDynamicCastExprClass:
483     K = CXCursor_CXXDynamicCastExpr;
484     break;
485 
486   case Stmt::CXXReinterpretCastExprClass:
487     K = CXCursor_CXXReinterpretCastExpr;
488     break;
489 
490   case Stmt::CXXConstCastExprClass:
491     K = CXCursor_CXXConstCastExpr;
492     break;
493 
494   case Stmt::CXXFunctionalCastExprClass:
495     K = CXCursor_CXXFunctionalCastExpr;
496     break;
497 
498   case Stmt::CXXAddrspaceCastExprClass:
499     K = CXCursor_CXXAddrspaceCastExpr;
500     break;
501 
502   case Stmt::CXXTypeidExprClass:
503     K = CXCursor_CXXTypeidExpr;
504     break;
505 
506   case Stmt::CXXBoolLiteralExprClass:
507     K = CXCursor_CXXBoolLiteralExpr;
508     break;
509 
510   case Stmt::CXXNullPtrLiteralExprClass:
511     K = CXCursor_CXXNullPtrLiteralExpr;
512     break;
513 
514   case Stmt::CXXThisExprClass:
515     K = CXCursor_CXXThisExpr;
516     break;
517 
518   case Stmt::CXXThrowExprClass:
519     K = CXCursor_CXXThrowExpr;
520     break;
521 
522   case Stmt::CXXNewExprClass:
523     K = CXCursor_CXXNewExpr;
524     break;
525 
526   case Stmt::CXXDeleteExprClass:
527     K = CXCursor_CXXDeleteExpr;
528     break;
529 
530   case Stmt::ObjCStringLiteralClass:
531     K = CXCursor_ObjCStringLiteral;
532     break;
533 
534   case Stmt::ObjCEncodeExprClass:
535     K = CXCursor_ObjCEncodeExpr;
536     break;
537 
538   case Stmt::ObjCSelectorExprClass:
539     K = CXCursor_ObjCSelectorExpr;
540     break;
541 
542   case Stmt::ObjCProtocolExprClass:
543     K = CXCursor_ObjCProtocolExpr;
544     break;
545 
546   case Stmt::ObjCBoolLiteralExprClass:
547     K = CXCursor_ObjCBoolLiteralExpr;
548     break;
549 
550   case Stmt::ObjCAvailabilityCheckExprClass:
551     K = CXCursor_ObjCAvailabilityCheckExpr;
552     break;
553 
554   case Stmt::ObjCBridgedCastExprClass:
555     K = CXCursor_ObjCBridgedCastExpr;
556     break;
557 
558   case Stmt::BlockExprClass:
559     K = CXCursor_BlockExpr;
560     break;
561 
562   case Stmt::PackExpansionExprClass:
563     K = CXCursor_PackExpansionExpr;
564     break;
565 
566   case Stmt::SizeOfPackExprClass:
567     K = CXCursor_SizeOfPackExpr;
568     break;
569 
570   case Stmt::DeclRefExprClass:
571     if (const ImplicitParamDecl *IPD = dyn_cast_or_null<ImplicitParamDecl>(
572             cast<DeclRefExpr>(S)->getDecl())) {
573       if (const ObjCMethodDecl *MD =
574               dyn_cast<ObjCMethodDecl>(IPD->getDeclContext())) {
575         if (MD->getSelfDecl() == IPD) {
576           K = CXCursor_ObjCSelfExpr;
577           break;
578         }
579       }
580     }
581 
582     K = CXCursor_DeclRefExpr;
583     break;
584 
585   case Stmt::DependentScopeDeclRefExprClass:
586   case Stmt::SubstNonTypeTemplateParmExprClass:
587   case Stmt::SubstNonTypeTemplateParmPackExprClass:
588   case Stmt::FunctionParmPackExprClass:
589   case Stmt::UnresolvedLookupExprClass:
590   case Stmt::TypoExprClass: // A typo could actually be a DeclRef or a MemberRef
591     K = CXCursor_DeclRefExpr;
592     break;
593 
594   case Stmt::CXXDependentScopeMemberExprClass:
595   case Stmt::CXXPseudoDestructorExprClass:
596   case Stmt::MemberExprClass:
597   case Stmt::MSPropertyRefExprClass:
598   case Stmt::ObjCIsaExprClass:
599   case Stmt::ObjCIvarRefExprClass:
600   case Stmt::ObjCPropertyRefExprClass:
601   case Stmt::UnresolvedMemberExprClass:
602     K = CXCursor_MemberRefExpr;
603     break;
604 
605   case Stmt::CallExprClass:
606   case Stmt::CXXOperatorCallExprClass:
607   case Stmt::CXXMemberCallExprClass:
608   case Stmt::CUDAKernelCallExprClass:
609   case Stmt::CXXConstructExprClass:
610   case Stmt::CXXInheritedCtorInitExprClass:
611   case Stmt::CXXTemporaryObjectExprClass:
612   case Stmt::CXXUnresolvedConstructExprClass:
613   case Stmt::UserDefinedLiteralClass:
614     K = CXCursor_CallExpr;
615     break;
616 
617   case Stmt::LambdaExprClass:
618     K = CXCursor_LambdaExpr;
619     break;
620 
621   case Stmt::ObjCMessageExprClass: {
622     K = CXCursor_ObjCMessageExpr;
623     int SelectorIdIndex = -1;
624     // Check if cursor points to a selector id.
625     if (RegionOfInterest.isValid() &&
626         RegionOfInterest.getBegin() == RegionOfInterest.getEnd()) {
627       SmallVector<SourceLocation, 16> SelLocs;
628       cast<ObjCMessageExpr>(S)->getSelectorLocs(SelLocs);
629       SmallVectorImpl<SourceLocation>::iterator I =
630           llvm::find(SelLocs, RegionOfInterest.getBegin());
631       if (I != SelLocs.end())
632         SelectorIdIndex = I - SelLocs.begin();
633     }
634     CXCursor C = {K, 0, {Parent, S, TU}};
635     return getSelectorIdentifierCursor(SelectorIdIndex, C);
636   }
637 
638   case Stmt::ConceptSpecializationExprClass:
639     K = CXCursor_ConceptSpecializationExpr;
640     break;
641 
642   case Stmt::RequiresExprClass:
643     K = CXCursor_RequiresExpr;
644     break;
645 
646   case Stmt::CXXParenListInitExprClass:
647     K = CXCursor_CXXParenListInitExpr;
648     break;
649 
650   case Stmt::MSDependentExistsStmtClass:
651     K = CXCursor_UnexposedStmt;
652     break;
653   case Stmt::OMPCanonicalLoopClass:
654     K = CXCursor_OMPCanonicalLoop;
655     break;
656   case Stmt::OMPMetaDirectiveClass:
657     K = CXCursor_OMPMetaDirective;
658     break;
659   case Stmt::OMPParallelDirectiveClass:
660     K = CXCursor_OMPParallelDirective;
661     break;
662   case Stmt::OMPSimdDirectiveClass:
663     K = CXCursor_OMPSimdDirective;
664     break;
665   case Stmt::OMPTileDirectiveClass:
666     K = CXCursor_OMPTileDirective;
667     break;
668   case Stmt::OMPUnrollDirectiveClass:
669     K = CXCursor_OMPUnrollDirective;
670     break;
671   case Stmt::OMPForDirectiveClass:
672     K = CXCursor_OMPForDirective;
673     break;
674   case Stmt::OMPForSimdDirectiveClass:
675     K = CXCursor_OMPForSimdDirective;
676     break;
677   case Stmt::OMPSectionsDirectiveClass:
678     K = CXCursor_OMPSectionsDirective;
679     break;
680   case Stmt::OMPSectionDirectiveClass:
681     K = CXCursor_OMPSectionDirective;
682     break;
683   case Stmt::OMPScopeDirectiveClass:
684     K = CXCursor_OMPScopeDirective;
685     break;
686   case Stmt::OMPSingleDirectiveClass:
687     K = CXCursor_OMPSingleDirective;
688     break;
689   case Stmt::OMPMasterDirectiveClass:
690     K = CXCursor_OMPMasterDirective;
691     break;
692   case Stmt::OMPCriticalDirectiveClass:
693     K = CXCursor_OMPCriticalDirective;
694     break;
695   case Stmt::OMPParallelForDirectiveClass:
696     K = CXCursor_OMPParallelForDirective;
697     break;
698   case Stmt::OMPParallelForSimdDirectiveClass:
699     K = CXCursor_OMPParallelForSimdDirective;
700     break;
701   case Stmt::OMPParallelMasterDirectiveClass:
702     K = CXCursor_OMPParallelMasterDirective;
703     break;
704   case Stmt::OMPParallelMaskedDirectiveClass:
705     K = CXCursor_OMPParallelMaskedDirective;
706     break;
707   case Stmt::OMPParallelSectionsDirectiveClass:
708     K = CXCursor_OMPParallelSectionsDirective;
709     break;
710   case Stmt::OMPTaskDirectiveClass:
711     K = CXCursor_OMPTaskDirective;
712     break;
713   case Stmt::OMPTaskyieldDirectiveClass:
714     K = CXCursor_OMPTaskyieldDirective;
715     break;
716   case Stmt::OMPBarrierDirectiveClass:
717     K = CXCursor_OMPBarrierDirective;
718     break;
719   case Stmt::OMPTaskwaitDirectiveClass:
720     K = CXCursor_OMPTaskwaitDirective;
721     break;
722   case Stmt::OMPErrorDirectiveClass:
723     K = CXCursor_OMPErrorDirective;
724     break;
725   case Stmt::OMPTaskgroupDirectiveClass:
726     K = CXCursor_OMPTaskgroupDirective;
727     break;
728   case Stmt::OMPFlushDirectiveClass:
729     K = CXCursor_OMPFlushDirective;
730     break;
731   case Stmt::OMPDepobjDirectiveClass:
732     K = CXCursor_OMPDepobjDirective;
733     break;
734   case Stmt::OMPScanDirectiveClass:
735     K = CXCursor_OMPScanDirective;
736     break;
737   case Stmt::OMPOrderedDirectiveClass:
738     K = CXCursor_OMPOrderedDirective;
739     break;
740   case Stmt::OMPAtomicDirectiveClass:
741     K = CXCursor_OMPAtomicDirective;
742     break;
743   case Stmt::OMPTargetDirectiveClass:
744     K = CXCursor_OMPTargetDirective;
745     break;
746   case Stmt::OMPTargetDataDirectiveClass:
747     K = CXCursor_OMPTargetDataDirective;
748     break;
749   case Stmt::OMPTargetEnterDataDirectiveClass:
750     K = CXCursor_OMPTargetEnterDataDirective;
751     break;
752   case Stmt::OMPTargetExitDataDirectiveClass:
753     K = CXCursor_OMPTargetExitDataDirective;
754     break;
755   case Stmt::OMPTargetParallelDirectiveClass:
756     K = CXCursor_OMPTargetParallelDirective;
757     break;
758   case Stmt::OMPTargetParallelForDirectiveClass:
759     K = CXCursor_OMPTargetParallelForDirective;
760     break;
761   case Stmt::OMPTargetUpdateDirectiveClass:
762     K = CXCursor_OMPTargetUpdateDirective;
763     break;
764   case Stmt::OMPTeamsDirectiveClass:
765     K = CXCursor_OMPTeamsDirective;
766     break;
767   case Stmt::OMPCancellationPointDirectiveClass:
768     K = CXCursor_OMPCancellationPointDirective;
769     break;
770   case Stmt::OMPCancelDirectiveClass:
771     K = CXCursor_OMPCancelDirective;
772     break;
773   case Stmt::OMPTaskLoopDirectiveClass:
774     K = CXCursor_OMPTaskLoopDirective;
775     break;
776   case Stmt::OMPTaskLoopSimdDirectiveClass:
777     K = CXCursor_OMPTaskLoopSimdDirective;
778     break;
779   case Stmt::OMPMasterTaskLoopDirectiveClass:
780     K = CXCursor_OMPMasterTaskLoopDirective;
781     break;
782   case Stmt::OMPMaskedTaskLoopDirectiveClass:
783     K = CXCursor_OMPMaskedTaskLoopDirective;
784     break;
785   case Stmt::OMPMasterTaskLoopSimdDirectiveClass:
786     K = CXCursor_OMPMasterTaskLoopSimdDirective;
787     break;
788   case Stmt::OMPMaskedTaskLoopSimdDirectiveClass:
789     K = CXCursor_OMPMaskedTaskLoopSimdDirective;
790     break;
791   case Stmt::OMPParallelMasterTaskLoopDirectiveClass:
792     K = CXCursor_OMPParallelMasterTaskLoopDirective;
793     break;
794   case Stmt::OMPParallelMaskedTaskLoopDirectiveClass:
795     K = CXCursor_OMPParallelMaskedTaskLoopDirective;
796     break;
797   case Stmt::OMPParallelMasterTaskLoopSimdDirectiveClass:
798     K = CXCursor_OMPParallelMasterTaskLoopSimdDirective;
799     break;
800   case Stmt::OMPParallelMaskedTaskLoopSimdDirectiveClass:
801     K = CXCursor_OMPParallelMaskedTaskLoopSimdDirective;
802     break;
803   case Stmt::OMPDistributeDirectiveClass:
804     K = CXCursor_OMPDistributeDirective;
805     break;
806   case Stmt::OMPDistributeParallelForDirectiveClass:
807     K = CXCursor_OMPDistributeParallelForDirective;
808     break;
809   case Stmt::OMPDistributeParallelForSimdDirectiveClass:
810     K = CXCursor_OMPDistributeParallelForSimdDirective;
811     break;
812   case Stmt::OMPDistributeSimdDirectiveClass:
813     K = CXCursor_OMPDistributeSimdDirective;
814     break;
815   case Stmt::OMPTargetParallelForSimdDirectiveClass:
816     K = CXCursor_OMPTargetParallelForSimdDirective;
817     break;
818   case Stmt::OMPTargetSimdDirectiveClass:
819     K = CXCursor_OMPTargetSimdDirective;
820     break;
821   case Stmt::OMPTeamsDistributeDirectiveClass:
822     K = CXCursor_OMPTeamsDistributeDirective;
823     break;
824   case Stmt::OMPTeamsDistributeSimdDirectiveClass:
825     K = CXCursor_OMPTeamsDistributeSimdDirective;
826     break;
827   case Stmt::OMPTeamsDistributeParallelForSimdDirectiveClass:
828     K = CXCursor_OMPTeamsDistributeParallelForSimdDirective;
829     break;
830   case Stmt::OMPTeamsDistributeParallelForDirectiveClass:
831     K = CXCursor_OMPTeamsDistributeParallelForDirective;
832     break;
833   case Stmt::OMPTargetTeamsDirectiveClass:
834     K = CXCursor_OMPTargetTeamsDirective;
835     break;
836   case Stmt::OMPTargetTeamsDistributeDirectiveClass:
837     K = CXCursor_OMPTargetTeamsDistributeDirective;
838     break;
839   case Stmt::OMPTargetTeamsDistributeParallelForDirectiveClass:
840     K = CXCursor_OMPTargetTeamsDistributeParallelForDirective;
841     break;
842   case Stmt::OMPTargetTeamsDistributeParallelForSimdDirectiveClass:
843     K = CXCursor_OMPTargetTeamsDistributeParallelForSimdDirective;
844     break;
845   case Stmt::OMPTargetTeamsDistributeSimdDirectiveClass:
846     K = CXCursor_OMPTargetTeamsDistributeSimdDirective;
847     break;
848   case Stmt::OMPInteropDirectiveClass:
849     K = CXCursor_OMPInteropDirective;
850     break;
851   case Stmt::OMPDispatchDirectiveClass:
852     K = CXCursor_OMPDispatchDirective;
853     break;
854   case Stmt::OMPMaskedDirectiveClass:
855     K = CXCursor_OMPMaskedDirective;
856     break;
857   case Stmt::OMPGenericLoopDirectiveClass:
858     K = CXCursor_OMPGenericLoopDirective;
859     break;
860   case Stmt::OMPTeamsGenericLoopDirectiveClass:
861     K = CXCursor_OMPTeamsGenericLoopDirective;
862     break;
863   case Stmt::OMPTargetTeamsGenericLoopDirectiveClass:
864     K = CXCursor_OMPTargetTeamsGenericLoopDirective;
865     break;
866   case Stmt::OMPParallelGenericLoopDirectiveClass:
867     K = CXCursor_OMPParallelGenericLoopDirective;
868     break;
869   case Stmt::OMPTargetParallelGenericLoopDirectiveClass:
870     K = CXCursor_OMPTargetParallelGenericLoopDirective;
871     break;
872   case Stmt::BuiltinBitCastExprClass:
873     K = CXCursor_BuiltinBitCastExpr;
874   }
875 
876   CXCursor C = {K, 0, {Parent, S, TU}};
877   return C;
878 }
879 
880 CXCursor cxcursor::MakeCursorObjCSuperClassRef(ObjCInterfaceDecl *Super,
881                                                SourceLocation Loc,
882                                                CXTranslationUnit TU) {
883   assert(Super && TU && "Invalid arguments!");
884   void *RawLoc = Loc.getPtrEncoding();
885   CXCursor C = {CXCursor_ObjCSuperClassRef, 0, {Super, RawLoc, TU}};
886   return C;
887 }
888 
889 std::pair<const ObjCInterfaceDecl *, SourceLocation>
890 cxcursor::getCursorObjCSuperClassRef(CXCursor C) {
891   assert(C.kind == CXCursor_ObjCSuperClassRef);
892   return std::make_pair(static_cast<const ObjCInterfaceDecl *>(C.data[0]),
893                         SourceLocation::getFromPtrEncoding(C.data[1]));
894 }
895 
896 CXCursor cxcursor::MakeCursorObjCProtocolRef(const ObjCProtocolDecl *Proto,
897                                              SourceLocation Loc,
898                                              CXTranslationUnit TU) {
899   assert(Proto && TU && "Invalid arguments!");
900   void *RawLoc = Loc.getPtrEncoding();
901   CXCursor C = {CXCursor_ObjCProtocolRef, 0, {Proto, RawLoc, TU}};
902   return C;
903 }
904 
905 std::pair<const ObjCProtocolDecl *, SourceLocation>
906 cxcursor::getCursorObjCProtocolRef(CXCursor C) {
907   assert(C.kind == CXCursor_ObjCProtocolRef);
908   return std::make_pair(static_cast<const ObjCProtocolDecl *>(C.data[0]),
909                         SourceLocation::getFromPtrEncoding(C.data[1]));
910 }
911 
912 CXCursor cxcursor::MakeCursorObjCClassRef(const ObjCInterfaceDecl *Class,
913                                           SourceLocation Loc,
914                                           CXTranslationUnit TU) {
915   // 'Class' can be null for invalid code.
916   if (!Class)
917     return MakeCXCursorInvalid(CXCursor_InvalidCode);
918   assert(TU && "Invalid arguments!");
919   void *RawLoc = Loc.getPtrEncoding();
920   CXCursor C = {CXCursor_ObjCClassRef, 0, {Class, RawLoc, TU}};
921   return C;
922 }
923 
924 std::pair<const ObjCInterfaceDecl *, SourceLocation>
925 cxcursor::getCursorObjCClassRef(CXCursor C) {
926   assert(C.kind == CXCursor_ObjCClassRef);
927   return std::make_pair(static_cast<const ObjCInterfaceDecl *>(C.data[0]),
928                         SourceLocation::getFromPtrEncoding(C.data[1]));
929 }
930 
931 CXCursor cxcursor::MakeCursorTypeRef(const TypeDecl *Type, SourceLocation Loc,
932                                      CXTranslationUnit TU) {
933   assert(Type && TU && "Invalid arguments!");
934   void *RawLoc = Loc.getPtrEncoding();
935   CXCursor C = {CXCursor_TypeRef, 0, {Type, RawLoc, TU}};
936   return C;
937 }
938 
939 std::pair<const TypeDecl *, SourceLocation>
940 cxcursor::getCursorTypeRef(CXCursor C) {
941   assert(C.kind == CXCursor_TypeRef);
942   return std::make_pair(static_cast<const TypeDecl *>(C.data[0]),
943                         SourceLocation::getFromPtrEncoding(C.data[1]));
944 }
945 
946 CXCursor cxcursor::MakeCursorTemplateRef(const TemplateDecl *Template,
947                                          SourceLocation Loc,
948                                          CXTranslationUnit TU) {
949   assert(Template && TU && "Invalid arguments!");
950   void *RawLoc = Loc.getPtrEncoding();
951   CXCursor C = {CXCursor_TemplateRef, 0, {Template, RawLoc, TU}};
952   return C;
953 }
954 
955 std::pair<const TemplateDecl *, SourceLocation>
956 cxcursor::getCursorTemplateRef(CXCursor C) {
957   assert(C.kind == CXCursor_TemplateRef);
958   return std::make_pair(static_cast<const TemplateDecl *>(C.data[0]),
959                         SourceLocation::getFromPtrEncoding(C.data[1]));
960 }
961 
962 CXCursor cxcursor::MakeCursorNamespaceRef(const NamedDecl *NS,
963                                           SourceLocation Loc,
964                                           CXTranslationUnit TU) {
965 
966   assert(NS && (isa<NamespaceDecl>(NS) || isa<NamespaceAliasDecl>(NS)) && TU &&
967          "Invalid arguments!");
968   void *RawLoc = Loc.getPtrEncoding();
969   CXCursor C = {CXCursor_NamespaceRef, 0, {NS, RawLoc, TU}};
970   return C;
971 }
972 
973 std::pair<const NamedDecl *, SourceLocation>
974 cxcursor::getCursorNamespaceRef(CXCursor C) {
975   assert(C.kind == CXCursor_NamespaceRef);
976   return std::make_pair(static_cast<const NamedDecl *>(C.data[0]),
977                         SourceLocation::getFromPtrEncoding(C.data[1]));
978 }
979 
980 CXCursor cxcursor::MakeCursorVariableRef(const VarDecl *Var, SourceLocation Loc,
981                                          CXTranslationUnit TU) {
982 
983   assert(Var && TU && "Invalid arguments!");
984   void *RawLoc = Loc.getPtrEncoding();
985   CXCursor C = {CXCursor_VariableRef, 0, {Var, RawLoc, TU}};
986   return C;
987 }
988 
989 std::pair<const VarDecl *, SourceLocation>
990 cxcursor::getCursorVariableRef(CXCursor C) {
991   assert(C.kind == CXCursor_VariableRef);
992   return std::make_pair(static_cast<const VarDecl *>(C.data[0]),
993                         SourceLocation::getFromPtrEncoding(C.data[1]));
994 }
995 
996 CXCursor cxcursor::MakeCursorMemberRef(const FieldDecl *Field,
997                                        SourceLocation Loc,
998                                        CXTranslationUnit TU) {
999 
1000   assert(Field && TU && "Invalid arguments!");
1001   void *RawLoc = Loc.getPtrEncoding();
1002   CXCursor C = {CXCursor_MemberRef, 0, {Field, RawLoc, TU}};
1003   return C;
1004 }
1005 
1006 std::pair<const FieldDecl *, SourceLocation>
1007 cxcursor::getCursorMemberRef(CXCursor C) {
1008   assert(C.kind == CXCursor_MemberRef);
1009   return std::make_pair(static_cast<const FieldDecl *>(C.data[0]),
1010                         SourceLocation::getFromPtrEncoding(C.data[1]));
1011 }
1012 
1013 CXCursor cxcursor::MakeCursorCXXBaseSpecifier(const CXXBaseSpecifier *B,
1014                                               CXTranslationUnit TU) {
1015   CXCursor C = {CXCursor_CXXBaseSpecifier, 0, {B, nullptr, TU}};
1016   return C;
1017 }
1018 
1019 const CXXBaseSpecifier *cxcursor::getCursorCXXBaseSpecifier(CXCursor C) {
1020   assert(C.kind == CXCursor_CXXBaseSpecifier);
1021   return static_cast<const CXXBaseSpecifier *>(C.data[0]);
1022 }
1023 
1024 CXCursor cxcursor::MakePreprocessingDirectiveCursor(SourceRange Range,
1025                                                     CXTranslationUnit TU) {
1026   CXCursor C = {
1027       CXCursor_PreprocessingDirective,
1028       0,
1029       {Range.getBegin().getPtrEncoding(), Range.getEnd().getPtrEncoding(), TU}};
1030   return C;
1031 }
1032 
1033 SourceRange cxcursor::getCursorPreprocessingDirective(CXCursor C) {
1034   assert(C.kind == CXCursor_PreprocessingDirective);
1035   SourceRange Range(SourceLocation::getFromPtrEncoding(C.data[0]),
1036                     SourceLocation::getFromPtrEncoding(C.data[1]));
1037   ASTUnit *TU = getCursorASTUnit(C);
1038   return TU->mapRangeFromPreamble(Range);
1039 }
1040 
1041 CXCursor cxcursor::MakeMacroDefinitionCursor(const MacroDefinitionRecord *MI,
1042                                              CXTranslationUnit TU) {
1043   CXCursor C = {CXCursor_MacroDefinition, 0, {MI, nullptr, TU}};
1044   return C;
1045 }
1046 
1047 const MacroDefinitionRecord *cxcursor::getCursorMacroDefinition(CXCursor C) {
1048   assert(C.kind == CXCursor_MacroDefinition);
1049   return static_cast<const MacroDefinitionRecord *>(C.data[0]);
1050 }
1051 
1052 CXCursor cxcursor::MakeMacroExpansionCursor(MacroExpansion *MI,
1053                                             CXTranslationUnit TU) {
1054   CXCursor C = {CXCursor_MacroExpansion, 0, {MI, nullptr, TU}};
1055   return C;
1056 }
1057 
1058 CXCursor cxcursor::MakeMacroExpansionCursor(MacroDefinitionRecord *MI,
1059                                             SourceLocation Loc,
1060                                             CXTranslationUnit TU) {
1061   assert(Loc.isValid());
1062   CXCursor C = {CXCursor_MacroExpansion, 0, {MI, Loc.getPtrEncoding(), TU}};
1063   return C;
1064 }
1065 
1066 const IdentifierInfo *cxcursor::MacroExpansionCursor::getName() const {
1067   if (isPseudo())
1068     return getAsMacroDefinition()->getName();
1069   return getAsMacroExpansion()->getName();
1070 }
1071 const MacroDefinitionRecord *
1072 cxcursor::MacroExpansionCursor::getDefinition() const {
1073   if (isPseudo())
1074     return getAsMacroDefinition();
1075   return getAsMacroExpansion()->getDefinition();
1076 }
1077 SourceRange cxcursor::MacroExpansionCursor::getSourceRange() const {
1078   if (isPseudo())
1079     return getPseudoLoc();
1080   return getAsMacroExpansion()->getSourceRange();
1081 }
1082 
1083 CXCursor cxcursor::MakeInclusionDirectiveCursor(InclusionDirective *ID,
1084                                                 CXTranslationUnit TU) {
1085   CXCursor C = {CXCursor_InclusionDirective, 0, {ID, nullptr, TU}};
1086   return C;
1087 }
1088 
1089 const InclusionDirective *cxcursor::getCursorInclusionDirective(CXCursor C) {
1090   assert(C.kind == CXCursor_InclusionDirective);
1091   return static_cast<const InclusionDirective *>(C.data[0]);
1092 }
1093 
1094 CXCursor cxcursor::MakeCursorLabelRef(LabelStmt *Label, SourceLocation Loc,
1095                                       CXTranslationUnit TU) {
1096 
1097   assert(Label && TU && "Invalid arguments!");
1098   void *RawLoc = Loc.getPtrEncoding();
1099   CXCursor C = {CXCursor_LabelRef, 0, {Label, RawLoc, TU}};
1100   return C;
1101 }
1102 
1103 std::pair<const LabelStmt *, SourceLocation>
1104 cxcursor::getCursorLabelRef(CXCursor C) {
1105   assert(C.kind == CXCursor_LabelRef);
1106   return std::make_pair(static_cast<const LabelStmt *>(C.data[0]),
1107                         SourceLocation::getFromPtrEncoding(C.data[1]));
1108 }
1109 
1110 CXCursor cxcursor::MakeCursorOverloadedDeclRef(const OverloadExpr *E,
1111                                                CXTranslationUnit TU) {
1112   assert(E && TU && "Invalid arguments!");
1113   OverloadedDeclRefStorage Storage(E);
1114   void *RawLoc = E->getNameLoc().getPtrEncoding();
1115   CXCursor C = {
1116       CXCursor_OverloadedDeclRef, 0, {Storage.getOpaqueValue(), RawLoc, TU}};
1117   return C;
1118 }
1119 
1120 CXCursor cxcursor::MakeCursorOverloadedDeclRef(const Decl *D,
1121                                                SourceLocation Loc,
1122                                                CXTranslationUnit TU) {
1123   assert(D && TU && "Invalid arguments!");
1124   void *RawLoc = Loc.getPtrEncoding();
1125   OverloadedDeclRefStorage Storage(D);
1126   CXCursor C = {
1127       CXCursor_OverloadedDeclRef, 0, {Storage.getOpaqueValue(), RawLoc, TU}};
1128   return C;
1129 }
1130 
1131 CXCursor cxcursor::MakeCursorOverloadedDeclRef(TemplateName Name,
1132                                                SourceLocation Loc,
1133                                                CXTranslationUnit TU) {
1134   assert(Name.getAsOverloadedTemplate() && TU && "Invalid arguments!");
1135   void *RawLoc = Loc.getPtrEncoding();
1136   OverloadedDeclRefStorage Storage(Name.getAsOverloadedTemplate());
1137   CXCursor C = {
1138       CXCursor_OverloadedDeclRef, 0, {Storage.getOpaqueValue(), RawLoc, TU}};
1139   return C;
1140 }
1141 
1142 std::pair<cxcursor::OverloadedDeclRefStorage, SourceLocation>
1143 cxcursor::getCursorOverloadedDeclRef(CXCursor C) {
1144   assert(C.kind == CXCursor_OverloadedDeclRef);
1145   return std::make_pair(OverloadedDeclRefStorage::getFromOpaqueValue(
1146                             const_cast<void *>(C.data[0])),
1147                         SourceLocation::getFromPtrEncoding(C.data[1]));
1148 }
1149 
1150 const Decl *cxcursor::getCursorDecl(CXCursor Cursor) {
1151   return static_cast<const Decl *>(Cursor.data[0]);
1152 }
1153 
1154 const Expr *cxcursor::getCursorExpr(CXCursor Cursor) {
1155   return dyn_cast_or_null<Expr>(getCursorStmt(Cursor));
1156 }
1157 
1158 const Stmt *cxcursor::getCursorStmt(CXCursor Cursor) {
1159   if (Cursor.kind == CXCursor_ObjCSuperClassRef ||
1160       Cursor.kind == CXCursor_ObjCProtocolRef ||
1161       Cursor.kind == CXCursor_ObjCClassRef)
1162     return nullptr;
1163 
1164   return static_cast<const Stmt *>(Cursor.data[1]);
1165 }
1166 
1167 const Attr *cxcursor::getCursorAttr(CXCursor Cursor) {
1168   return static_cast<const Attr *>(Cursor.data[1]);
1169 }
1170 
1171 ASTContext &cxcursor::getCursorContext(CXCursor Cursor) {
1172   return getCursorASTUnit(Cursor)->getASTContext();
1173 }
1174 
1175 ASTUnit *cxcursor::getCursorASTUnit(CXCursor Cursor) {
1176   CXTranslationUnit TU = getCursorTU(Cursor);
1177   if (!TU)
1178     return nullptr;
1179   return cxtu::getASTUnit(TU);
1180 }
1181 
1182 CXTranslationUnit cxcursor::getCursorTU(CXCursor Cursor) {
1183   return static_cast<CXTranslationUnit>(const_cast<void *>(Cursor.data[2]));
1184 }
1185 
1186 void cxcursor::getOverriddenCursors(CXCursor cursor,
1187                                     SmallVectorImpl<CXCursor> &overridden) {
1188   assert(clang_isDeclaration(cursor.kind));
1189   const NamedDecl *D = dyn_cast_or_null<NamedDecl>(getCursorDecl(cursor));
1190   if (!D)
1191     return;
1192 
1193   CXTranslationUnit TU = getCursorTU(cursor);
1194   SmallVector<const NamedDecl *, 8> OverDecls;
1195   D->getASTContext().getOverriddenMethods(D, OverDecls);
1196 
1197   for (SmallVectorImpl<const NamedDecl *>::iterator I = OverDecls.begin(),
1198                                                     E = OverDecls.end();
1199        I != E; ++I) {
1200     overridden.push_back(MakeCXCursor(*I, TU));
1201   }
1202 }
1203 
1204 std::pair<int, SourceLocation>
1205 cxcursor::getSelectorIdentifierIndexAndLoc(CXCursor cursor) {
1206   if (cursor.kind == CXCursor_ObjCMessageExpr) {
1207     if (cursor.xdata != -1)
1208       return std::make_pair(cursor.xdata,
1209                             cast<ObjCMessageExpr>(getCursorExpr(cursor))
1210                                 ->getSelectorLoc(cursor.xdata));
1211   } else if (cursor.kind == CXCursor_ObjCClassMethodDecl ||
1212              cursor.kind == CXCursor_ObjCInstanceMethodDecl) {
1213     if (cursor.xdata != -1)
1214       return std::make_pair(cursor.xdata,
1215                             cast<ObjCMethodDecl>(getCursorDecl(cursor))
1216                                 ->getSelectorLoc(cursor.xdata));
1217   }
1218 
1219   return std::make_pair(-1, SourceLocation());
1220 }
1221 
1222 CXCursor cxcursor::getSelectorIdentifierCursor(int SelIdx, CXCursor cursor) {
1223   CXCursor newCursor = cursor;
1224 
1225   if (cursor.kind == CXCursor_ObjCMessageExpr) {
1226     if (SelIdx == -1 ||
1227         unsigned(SelIdx) >=
1228             cast<ObjCMessageExpr>(getCursorExpr(cursor))->getNumSelectorLocs())
1229       newCursor.xdata = -1;
1230     else
1231       newCursor.xdata = SelIdx;
1232   } else if (cursor.kind == CXCursor_ObjCClassMethodDecl ||
1233              cursor.kind == CXCursor_ObjCInstanceMethodDecl) {
1234     if (SelIdx == -1 ||
1235         unsigned(SelIdx) >=
1236             cast<ObjCMethodDecl>(getCursorDecl(cursor))->getNumSelectorLocs())
1237       newCursor.xdata = -1;
1238     else
1239       newCursor.xdata = SelIdx;
1240   }
1241 
1242   return newCursor;
1243 }
1244 
1245 CXCursor cxcursor::getTypeRefCursor(CXCursor cursor) {
1246   if (cursor.kind != CXCursor_CallExpr)
1247     return cursor;
1248 
1249   if (cursor.xdata == 0)
1250     return cursor;
1251 
1252   const Expr *E = getCursorExpr(cursor);
1253   TypeSourceInfo *Type = nullptr;
1254   if (const CXXUnresolvedConstructExpr *UnCtor =
1255           dyn_cast<CXXUnresolvedConstructExpr>(E)) {
1256     Type = UnCtor->getTypeSourceInfo();
1257   } else if (const CXXTemporaryObjectExpr *Tmp =
1258                  dyn_cast<CXXTemporaryObjectExpr>(E)) {
1259     Type = Tmp->getTypeSourceInfo();
1260   }
1261 
1262   if (!Type)
1263     return cursor;
1264 
1265   CXTranslationUnit TU = getCursorTU(cursor);
1266   QualType Ty = Type->getType();
1267   TypeLoc TL = Type->getTypeLoc();
1268   SourceLocation Loc = TL.getBeginLoc();
1269 
1270   if (const ElaboratedType *ElabT = Ty->getAs<ElaboratedType>()) {
1271     Ty = ElabT->getNamedType();
1272     ElaboratedTypeLoc ElabTL = TL.castAs<ElaboratedTypeLoc>();
1273     Loc = ElabTL.getNamedTypeLoc().getBeginLoc();
1274   }
1275 
1276   if (const TypedefType *Typedef = Ty->getAs<TypedefType>())
1277     return MakeCursorTypeRef(Typedef->getDecl(), Loc, TU);
1278   if (const TagType *Tag = Ty->getAs<TagType>())
1279     return MakeCursorTypeRef(Tag->getDecl(), Loc, TU);
1280   if (const TemplateTypeParmType *TemplP = Ty->getAs<TemplateTypeParmType>())
1281     return MakeCursorTypeRef(TemplP->getDecl(), Loc, TU);
1282 
1283   return cursor;
1284 }
1285 
1286 bool cxcursor::operator==(CXCursor X, CXCursor Y) {
1287   return X.kind == Y.kind && X.data[0] == Y.data[0] && X.data[1] == Y.data[1] &&
1288          X.data[2] == Y.data[2];
1289 }
1290 
1291 // FIXME: Remove once we can model DeclGroups and their appropriate ranges
1292 // properly in the ASTs.
1293 bool cxcursor::isFirstInDeclGroup(CXCursor C) {
1294   assert(clang_isDeclaration(C.kind));
1295   return ((uintptr_t)(C.data[1])) != 0;
1296 }
1297 
1298 //===----------------------------------------------------------------------===//
1299 // libclang CXCursor APIs
1300 //===----------------------------------------------------------------------===//
1301 
1302 int clang_Cursor_isNull(CXCursor cursor) {
1303   return clang_equalCursors(cursor, clang_getNullCursor());
1304 }
1305 
1306 CXTranslationUnit clang_Cursor_getTranslationUnit(CXCursor cursor) {
1307   return getCursorTU(cursor);
1308 }
1309 
1310 int clang_Cursor_getNumArguments(CXCursor C) {
1311   if (clang_isDeclaration(C.kind)) {
1312     const Decl *D = cxcursor::getCursorDecl(C);
1313     if (const ObjCMethodDecl *MD = dyn_cast_or_null<ObjCMethodDecl>(D))
1314       return MD->param_size();
1315     if (const FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(D))
1316       return FD->param_size();
1317   }
1318 
1319   if (clang_isExpression(C.kind)) {
1320     const Expr *E = cxcursor::getCursorExpr(C);
1321     if (const CallExpr *CE = dyn_cast<CallExpr>(E)) {
1322       return CE->getNumArgs();
1323     }
1324     if (const CXXConstructExpr *CE = dyn_cast<CXXConstructExpr>(E)) {
1325       return CE->getNumArgs();
1326     }
1327   }
1328 
1329   return -1;
1330 }
1331 
1332 CXCursor clang_Cursor_getArgument(CXCursor C, unsigned i) {
1333   if (clang_isDeclaration(C.kind)) {
1334     const Decl *D = cxcursor::getCursorDecl(C);
1335     if (const ObjCMethodDecl *MD = dyn_cast_or_null<ObjCMethodDecl>(D)) {
1336       if (i < MD->param_size())
1337         return cxcursor::MakeCXCursor(MD->parameters()[i],
1338                                       cxcursor::getCursorTU(C));
1339     } else if (const FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(D)) {
1340       if (i < FD->param_size())
1341         return cxcursor::MakeCXCursor(FD->parameters()[i],
1342                                       cxcursor::getCursorTU(C));
1343     }
1344   }
1345 
1346   if (clang_isExpression(C.kind)) {
1347     const Expr *E = cxcursor::getCursorExpr(C);
1348     if (const CallExpr *CE = dyn_cast<CallExpr>(E)) {
1349       if (i < CE->getNumArgs()) {
1350         return cxcursor::MakeCXCursor(CE->getArg(i), getCursorDecl(C),
1351                                       cxcursor::getCursorTU(C));
1352       }
1353     }
1354     if (const CXXConstructExpr *CE = dyn_cast<CXXConstructExpr>(E)) {
1355       if (i < CE->getNumArgs()) {
1356         return cxcursor::MakeCXCursor(CE->getArg(i), getCursorDecl(C),
1357                                       cxcursor::getCursorTU(C));
1358       }
1359     }
1360   }
1361 
1362   return clang_getNullCursor();
1363 }
1364 
1365 int clang_Cursor_getNumTemplateArguments(CXCursor C) {
1366   CXCursorKind kind = clang_getCursorKind(C);
1367   if (kind != CXCursor_FunctionDecl && kind != CXCursor_StructDecl &&
1368       kind != CXCursor_ClassDecl &&
1369       kind != CXCursor_ClassTemplatePartialSpecialization) {
1370     return -1;
1371   }
1372 
1373   if (const auto *FD =
1374           llvm::dyn_cast_if_present<clang::FunctionDecl>(getCursorDecl(C))) {
1375     const FunctionTemplateSpecializationInfo *SpecInfo =
1376         FD->getTemplateSpecializationInfo();
1377     if (!SpecInfo) {
1378       return -1;
1379     }
1380     return SpecInfo->TemplateArguments->size();
1381   }
1382 
1383   if (const auto *SD =
1384           llvm::dyn_cast_if_present<clang::ClassTemplateSpecializationDecl>(
1385               getCursorDecl(C))) {
1386     return SD->getTemplateArgs().size();
1387   }
1388 
1389   return -1;
1390 }
1391 
1392 enum CXGetTemplateArgumentStatus {
1393   /** The operation completed successfully */
1394   CXGetTemplateArgumentStatus_Success = 0,
1395 
1396   /** The specified cursor did not represent a FunctionDecl or
1397       ClassTemplateSpecializationDecl.                         */
1398   CXGetTemplateArgumentStatus_CursorNotCompatibleDecl = -1,
1399 
1400   /** The specified cursor was not castable to a FunctionDecl or
1401       ClassTemplateSpecializationDecl.                         */
1402   CXGetTemplateArgumentStatus_BadDeclCast = -2,
1403 
1404   /** A NULL FunctionTemplateSpecializationInfo was retrieved. */
1405   CXGetTemplateArgumentStatus_NullTemplSpecInfo = -3,
1406 
1407   /** An invalid (OOB) argument index was specified */
1408   CXGetTemplateArgumentStatus_InvalidIndex = -4
1409 };
1410 
1411 static int clang_Cursor_getTemplateArgument(CXCursor C, unsigned I,
1412                                             TemplateArgument *TA) {
1413   CXCursorKind kind = clang_getCursorKind(C);
1414   if (kind != CXCursor_FunctionDecl && kind != CXCursor_StructDecl &&
1415       kind != CXCursor_ClassDecl &&
1416       kind != CXCursor_ClassTemplatePartialSpecialization) {
1417     return -1;
1418   }
1419 
1420   if (const auto *FD =
1421           llvm::dyn_cast_if_present<clang::FunctionDecl>(getCursorDecl(C))) {
1422 
1423     const FunctionTemplateSpecializationInfo *SpecInfo =
1424         FD->getTemplateSpecializationInfo();
1425     if (!SpecInfo) {
1426       return CXGetTemplateArgumentStatus_NullTemplSpecInfo;
1427     }
1428 
1429     if (I >= SpecInfo->TemplateArguments->size()) {
1430       return CXGetTemplateArgumentStatus_InvalidIndex;
1431     }
1432 
1433     *TA = SpecInfo->TemplateArguments->get(I);
1434     return 0;
1435   }
1436 
1437   if (const auto *SD =
1438           llvm::dyn_cast_if_present<clang::ClassTemplateSpecializationDecl>(
1439               getCursorDecl(C))) {
1440     if (I >= SD->getTemplateArgs().size()) {
1441       return CXGetTemplateArgumentStatus_InvalidIndex;
1442     }
1443 
1444     *TA = SD->getTemplateArgs()[I];
1445     return 0;
1446   }
1447 
1448   return CXGetTemplateArgumentStatus_BadDeclCast;
1449 }
1450 
1451 enum CXTemplateArgumentKind clang_Cursor_getTemplateArgumentKind(CXCursor C,
1452                                                                  unsigned I) {
1453   TemplateArgument TA;
1454   if (clang_Cursor_getTemplateArgument(C, I, &TA)) {
1455     return CXTemplateArgumentKind_Invalid;
1456   }
1457 
1458   switch (TA.getKind()) {
1459   case TemplateArgument::Null:
1460     return CXTemplateArgumentKind_Null;
1461   case TemplateArgument::Type:
1462     return CXTemplateArgumentKind_Type;
1463   case TemplateArgument::Declaration:
1464     return CXTemplateArgumentKind_Declaration;
1465   case TemplateArgument::NullPtr:
1466     return CXTemplateArgumentKind_NullPtr;
1467   case TemplateArgument::Integral:
1468     return CXTemplateArgumentKind_Integral;
1469   case TemplateArgument::StructuralValue:
1470     // FIXME: Expose these values.
1471     return CXTemplateArgumentKind_Invalid;
1472   case TemplateArgument::Template:
1473     return CXTemplateArgumentKind_Template;
1474   case TemplateArgument::TemplateExpansion:
1475     return CXTemplateArgumentKind_TemplateExpansion;
1476   case TemplateArgument::Expression:
1477     return CXTemplateArgumentKind_Expression;
1478   case TemplateArgument::Pack:
1479     return CXTemplateArgumentKind_Pack;
1480   }
1481 
1482   return CXTemplateArgumentKind_Invalid;
1483 }
1484 
1485 CXType clang_Cursor_getTemplateArgumentType(CXCursor C, unsigned I) {
1486   TemplateArgument TA;
1487   if (clang_Cursor_getTemplateArgument(C, I, &TA) !=
1488       CXGetTemplateArgumentStatus_Success) {
1489     return cxtype::MakeCXType(QualType(), getCursorTU(C));
1490   }
1491 
1492   if (TA.getKind() != TemplateArgument::Type) {
1493     return cxtype::MakeCXType(QualType(), getCursorTU(C));
1494   }
1495 
1496   return cxtype::MakeCXType(TA.getAsType(), getCursorTU(C));
1497 }
1498 
1499 long long clang_Cursor_getTemplateArgumentValue(CXCursor C, unsigned I) {
1500   TemplateArgument TA;
1501   if (clang_Cursor_getTemplateArgument(C, I, &TA) !=
1502       CXGetTemplateArgumentStatus_Success) {
1503     assert(0 && "Unable to retrieve TemplateArgument");
1504     return 0;
1505   }
1506 
1507   if (TA.getKind() != TemplateArgument::Integral) {
1508     assert(0 && "Passed template argument is not Integral");
1509     return 0;
1510   }
1511 
1512   return TA.getAsIntegral().getSExtValue();
1513 }
1514 
1515 unsigned long long clang_Cursor_getTemplateArgumentUnsignedValue(CXCursor C,
1516                                                                  unsigned I) {
1517   TemplateArgument TA;
1518   if (clang_Cursor_getTemplateArgument(C, I, &TA) !=
1519       CXGetTemplateArgumentStatus_Success) {
1520     assert(0 && "Unable to retrieve TemplateArgument");
1521     return 0;
1522   }
1523 
1524   if (TA.getKind() != TemplateArgument::Integral) {
1525     assert(0 && "Passed template argument is not Integral");
1526     return 0;
1527   }
1528 
1529   return TA.getAsIntegral().getZExtValue();
1530 }
1531 
1532 //===----------------------------------------------------------------------===//
1533 // CXCursorSet.
1534 //===----------------------------------------------------------------------===//
1535 
1536 typedef llvm::DenseMap<CXCursor, unsigned> CXCursorSet_Impl;
1537 
1538 static inline CXCursorSet packCXCursorSet(CXCursorSet_Impl *setImpl) {
1539   return (CXCursorSet)setImpl;
1540 }
1541 static inline CXCursorSet_Impl *unpackCXCursorSet(CXCursorSet set) {
1542   return (CXCursorSet_Impl *)set;
1543 }
1544 namespace llvm {
1545 template <> struct DenseMapInfo<CXCursor> {
1546 public:
1547   static inline CXCursor getEmptyKey() {
1548     return MakeCXCursorInvalid(CXCursor_InvalidFile);
1549   }
1550   static inline CXCursor getTombstoneKey() {
1551     return MakeCXCursorInvalid(CXCursor_NoDeclFound);
1552   }
1553   static inline unsigned getHashValue(const CXCursor &cursor) {
1554     return llvm::DenseMapInfo<std::pair<const void *, const void *>>::
1555         getHashValue(std::make_pair(cursor.data[0], cursor.data[1]));
1556   }
1557   static inline bool isEqual(const CXCursor &x, const CXCursor &y) {
1558     return x.kind == y.kind && x.data[0] == y.data[0] && x.data[1] == y.data[1];
1559   }
1560 };
1561 } // namespace llvm
1562 
1563 CXCursorSet clang_createCXCursorSet() {
1564   return packCXCursorSet(new CXCursorSet_Impl());
1565 }
1566 
1567 void clang_disposeCXCursorSet(CXCursorSet set) {
1568   delete unpackCXCursorSet(set);
1569 }
1570 
1571 unsigned clang_CXCursorSet_contains(CXCursorSet set, CXCursor cursor) {
1572   CXCursorSet_Impl *setImpl = unpackCXCursorSet(set);
1573   if (!setImpl)
1574     return 0;
1575   return setImpl->find(cursor) != setImpl->end();
1576 }
1577 
1578 unsigned clang_CXCursorSet_insert(CXCursorSet set, CXCursor cursor) {
1579   // Do not insert invalid cursors into the set.
1580   if (cursor.kind >= CXCursor_FirstInvalid &&
1581       cursor.kind <= CXCursor_LastInvalid)
1582     return 1;
1583 
1584   CXCursorSet_Impl *setImpl = unpackCXCursorSet(set);
1585   if (!setImpl)
1586     return 1;
1587   unsigned &entry = (*setImpl)[cursor];
1588   unsigned flag = entry == 0 ? 1 : 0;
1589   entry = 1;
1590   return flag;
1591 }
1592 
1593 CXCompletionString clang_getCursorCompletionString(CXCursor cursor) {
1594   enum CXCursorKind kind = clang_getCursorKind(cursor);
1595   if (clang_isDeclaration(kind)) {
1596     const Decl *decl = getCursorDecl(cursor);
1597     if (const NamedDecl *namedDecl = dyn_cast_or_null<NamedDecl>(decl)) {
1598       ASTUnit *unit = getCursorASTUnit(cursor);
1599       CodeCompletionResult Result(namedDecl, CCP_Declaration);
1600       CodeCompletionString *String = Result.CreateCodeCompletionString(
1601           unit->getASTContext(), unit->getPreprocessor(),
1602           CodeCompletionContext::CCC_Other,
1603           unit->getCodeCompletionTUInfo().getAllocator(),
1604           unit->getCodeCompletionTUInfo(), true);
1605       return String;
1606     }
1607   } else if (kind == CXCursor_MacroDefinition) {
1608     const MacroDefinitionRecord *definition = getCursorMacroDefinition(cursor);
1609     const IdentifierInfo *Macro = definition->getName();
1610     ASTUnit *unit = getCursorASTUnit(cursor);
1611     CodeCompletionResult Result(
1612         Macro,
1613         unit->getPreprocessor().getMacroDefinition(Macro).getMacroInfo());
1614     CodeCompletionString *String = Result.CreateCodeCompletionString(
1615         unit->getASTContext(), unit->getPreprocessor(),
1616         CodeCompletionContext::CCC_Other,
1617         unit->getCodeCompletionTUInfo().getAllocator(),
1618         unit->getCodeCompletionTUInfo(), false);
1619     return String;
1620   }
1621   return nullptr;
1622 }
1623 
1624 namespace {
1625 struct OverridenCursorsPool {
1626   typedef SmallVector<CXCursor, 2> CursorVec;
1627   std::vector<CursorVec *> AllCursors;
1628   std::vector<CursorVec *> AvailableCursors;
1629 
1630   ~OverridenCursorsPool() {
1631     for (std::vector<CursorVec *>::iterator I = AllCursors.begin(),
1632                                             E = AllCursors.end();
1633          I != E; ++I) {
1634       delete *I;
1635     }
1636   }
1637 };
1638 } // namespace
1639 
1640 void *cxcursor::createOverridenCXCursorsPool() {
1641   return new OverridenCursorsPool();
1642 }
1643 
1644 void cxcursor::disposeOverridenCXCursorsPool(void *pool) {
1645   delete static_cast<OverridenCursorsPool *>(pool);
1646 }
1647 
1648 void clang_getOverriddenCursors(CXCursor cursor, CXCursor **overridden,
1649                                 unsigned *num_overridden) {
1650   if (overridden)
1651     *overridden = nullptr;
1652   if (num_overridden)
1653     *num_overridden = 0;
1654 
1655   CXTranslationUnit TU = cxcursor::getCursorTU(cursor);
1656 
1657   if (!overridden || !num_overridden || !TU)
1658     return;
1659 
1660   if (!clang_isDeclaration(cursor.kind))
1661     return;
1662 
1663   OverridenCursorsPool &pool =
1664       *static_cast<OverridenCursorsPool *>(TU->OverridenCursorsPool);
1665 
1666   OverridenCursorsPool::CursorVec *Vec = nullptr;
1667 
1668   if (!pool.AvailableCursors.empty()) {
1669     Vec = pool.AvailableCursors.back();
1670     pool.AvailableCursors.pop_back();
1671   } else {
1672     Vec = new OverridenCursorsPool::CursorVec();
1673     pool.AllCursors.push_back(Vec);
1674   }
1675 
1676   // Clear out the vector, but don't free the memory contents.  This
1677   // reduces malloc() traffic.
1678   Vec->clear();
1679 
1680   // Use the first entry to contain a back reference to the vector.
1681   // This is a complete hack.
1682   CXCursor backRefCursor = MakeCXCursorInvalid(CXCursor_InvalidFile, TU);
1683   backRefCursor.data[0] = Vec;
1684   assert(cxcursor::getCursorTU(backRefCursor) == TU);
1685   Vec->push_back(backRefCursor);
1686 
1687   // Get the overridden cursors.
1688   cxcursor::getOverriddenCursors(cursor, *Vec);
1689 
1690   // Did we get any overridden cursors?  If not, return Vec to the pool
1691   // of available cursor vectors.
1692   if (Vec->size() == 1) {
1693     pool.AvailableCursors.push_back(Vec);
1694     return;
1695   }
1696 
1697   // Now tell the caller about the overridden cursors.
1698   assert(Vec->size() > 1);
1699   *overridden = &((*Vec)[1]);
1700   *num_overridden = Vec->size() - 1;
1701 }
1702 
1703 void clang_disposeOverriddenCursors(CXCursor *overridden) {
1704   if (!overridden)
1705     return;
1706 
1707   // Use pointer arithmetic to get back the first faux entry
1708   // which has a back-reference to the TU and the vector.
1709   --overridden;
1710   OverridenCursorsPool::CursorVec *Vec =
1711       static_cast<OverridenCursorsPool::CursorVec *>(
1712           const_cast<void *>(overridden->data[0]));
1713   CXTranslationUnit TU = getCursorTU(*overridden);
1714 
1715   assert(Vec && TU);
1716 
1717   OverridenCursorsPool &pool =
1718       *static_cast<OverridenCursorsPool *>(TU->OverridenCursorsPool);
1719 
1720   pool.AvailableCursors.push_back(Vec);
1721 }
1722 
1723 int clang_Cursor_isDynamicCall(CXCursor C) {
1724   const Expr *E = nullptr;
1725   if (clang_isExpression(C.kind))
1726     E = getCursorExpr(C);
1727   if (!E)
1728     return 0;
1729 
1730   if (const ObjCMessageExpr *MsgE = dyn_cast<ObjCMessageExpr>(E)) {
1731     if (MsgE->getReceiverKind() != ObjCMessageExpr::Instance)
1732       return false;
1733     if (auto *RecE = dyn_cast<ObjCMessageExpr>(
1734             MsgE->getInstanceReceiver()->IgnoreParenCasts())) {
1735       if (RecE->getMethodFamily() == OMF_alloc)
1736         return false;
1737     }
1738     return true;
1739   }
1740 
1741   if (auto *PropRefE = dyn_cast<ObjCPropertyRefExpr>(E)) {
1742     return !PropRefE->isSuperReceiver();
1743   }
1744 
1745   const MemberExpr *ME = nullptr;
1746   if (isa<MemberExpr>(E))
1747     ME = cast<MemberExpr>(E);
1748   else if (const CallExpr *CE = dyn_cast<CallExpr>(E))
1749     ME = dyn_cast_or_null<MemberExpr>(CE->getCallee());
1750 
1751   if (ME) {
1752     if (const CXXMethodDecl *MD =
1753             dyn_cast_or_null<CXXMethodDecl>(ME->getMemberDecl()))
1754       return MD->isVirtual() &&
1755              ME->performsVirtualDispatch(
1756                  cxcursor::getCursorContext(C).getLangOpts());
1757   }
1758 
1759   return 0;
1760 }
1761 
1762 CXType clang_Cursor_getReceiverType(CXCursor C) {
1763   CXTranslationUnit TU = cxcursor::getCursorTU(C);
1764   const Expr *E = nullptr;
1765   if (clang_isExpression(C.kind))
1766     E = getCursorExpr(C);
1767 
1768   if (const ObjCMessageExpr *MsgE = dyn_cast_or_null<ObjCMessageExpr>(E))
1769     return cxtype::MakeCXType(MsgE->getReceiverType(), TU);
1770 
1771   if (auto *PropRefE = dyn_cast<ObjCPropertyRefExpr>(E)) {
1772     return cxtype::MakeCXType(
1773         PropRefE->getReceiverType(cxcursor::getCursorContext(C)), TU);
1774   }
1775 
1776   const MemberExpr *ME = nullptr;
1777   if (isa<MemberExpr>(E))
1778     ME = cast<MemberExpr>(E);
1779   else if (const CallExpr *CE = dyn_cast<CallExpr>(E))
1780     ME = dyn_cast_or_null<MemberExpr>(CE->getCallee());
1781 
1782   if (ME) {
1783     if (isa_and_nonnull<CXXMethodDecl>(ME->getMemberDecl())) {
1784       auto receiverTy = ME->getBase()->IgnoreImpCasts()->getType();
1785       return cxtype::MakeCXType(receiverTy, TU);
1786     }
1787   }
1788 
1789   return cxtype::MakeCXType(QualType(), TU);
1790 }
1791