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::ConceptSpecializationExprClass:
303   case Stmt::RequiresExprClass:
304   case Stmt::DependentCoawaitExprClass:
305   case Stmt::CoyieldExprClass:
306   case Stmt::CXXBindTemporaryExprClass:
307   case Stmt::CXXDefaultArgExprClass:
308   case Stmt::CXXDefaultInitExprClass:
309   case Stmt::CXXFoldExprClass:
310   case Stmt::CXXRewrittenBinaryOperatorClass:
311   case Stmt::CXXStdInitializerListExprClass:
312   case Stmt::CXXScalarValueInitExprClass:
313   case Stmt::CXXUuidofExprClass:
314   case Stmt::ChooseExprClass:
315   case Stmt::DesignatedInitExprClass:
316   case Stmt::DesignatedInitUpdateExprClass:
317   case Stmt::ArrayInitLoopExprClass:
318   case Stmt::ArrayInitIndexExprClass:
319   case Stmt::ExprWithCleanupsClass:
320   case Stmt::ExpressionTraitExprClass:
321   case Stmt::ExtVectorElementExprClass:
322   case Stmt::ImplicitCastExprClass:
323   case Stmt::ImplicitValueInitExprClass:
324   case Stmt::NoInitExprClass:
325   case Stmt::MaterializeTemporaryExprClass:
326   case Stmt::ObjCIndirectCopyRestoreExprClass:
327   case Stmt::OffsetOfExprClass:
328   case Stmt::ParenListExprClass:
329   case Stmt::PredefinedExprClass:
330   case Stmt::ShuffleVectorExprClass:
331   case Stmt::SourceLocExprClass:
332   case Stmt::ConvertVectorExprClass:
333   case Stmt::VAArgExprClass:
334   case Stmt::ObjCArrayLiteralClass:
335   case Stmt::ObjCDictionaryLiteralClass:
336   case Stmt::ObjCBoxedExprClass:
337   case Stmt::ObjCSubscriptRefExprClass:
338   case Stmt::RecoveryExprClass:
339     K = CXCursor_UnexposedExpr;
340     break;
341 
342   case Stmt::OpaqueValueExprClass:
343     if (Expr *Src = cast<OpaqueValueExpr>(S)->getSourceExpr())
344       return MakeCXCursor(Src, Parent, TU, RegionOfInterest);
345     K = CXCursor_UnexposedExpr;
346     break;
347 
348   case Stmt::PseudoObjectExprClass:
349     return MakeCXCursor(cast<PseudoObjectExpr>(S)->getSyntacticForm(), Parent,
350                         TU, RegionOfInterest);
351 
352   case Stmt::CompoundStmtClass:
353     K = CXCursor_CompoundStmt;
354     break;
355 
356   case Stmt::NullStmtClass:
357     K = CXCursor_NullStmt;
358     break;
359 
360   case Stmt::LabelStmtClass:
361     K = CXCursor_LabelStmt;
362     break;
363 
364   case Stmt::AttributedStmtClass:
365     K = CXCursor_UnexposedStmt;
366     break;
367 
368   case Stmt::DeclStmtClass:
369     K = CXCursor_DeclStmt;
370     break;
371 
372   case Stmt::CapturedStmtClass:
373     K = CXCursor_UnexposedStmt;
374     break;
375 
376   case Stmt::IntegerLiteralClass:
377     K = CXCursor_IntegerLiteral;
378     break;
379 
380   case Stmt::FixedPointLiteralClass:
381     K = CXCursor_FixedPointLiteral;
382     break;
383 
384   case Stmt::FloatingLiteralClass:
385     K = CXCursor_FloatingLiteral;
386     break;
387 
388   case Stmt::ImaginaryLiteralClass:
389     K = CXCursor_ImaginaryLiteral;
390     break;
391 
392   case Stmt::StringLiteralClass:
393     K = CXCursor_StringLiteral;
394     break;
395 
396   case Stmt::CharacterLiteralClass:
397     K = CXCursor_CharacterLiteral;
398     break;
399 
400   case Stmt::ConstantExprClass:
401     return MakeCXCursor(cast<ConstantExpr>(S)->getSubExpr(), Parent, TU,
402                         RegionOfInterest);
403 
404   case Stmt::ParenExprClass:
405     K = CXCursor_ParenExpr;
406     break;
407 
408   case Stmt::UnaryOperatorClass:
409     K = CXCursor_UnaryOperator;
410     break;
411 
412   case Stmt::UnaryExprOrTypeTraitExprClass:
413   case Stmt::CXXNoexceptExprClass:
414     K = CXCursor_UnaryExpr;
415     break;
416 
417   case Stmt::MSPropertySubscriptExprClass:
418   case Stmt::ArraySubscriptExprClass:
419     K = CXCursor_ArraySubscriptExpr;
420     break;
421 
422   case Stmt::MatrixSubscriptExprClass:
423     // TODO: add support for MatrixSubscriptExpr.
424     K = CXCursor_UnexposedExpr;
425     break;
426 
427   case Stmt::OMPArraySectionExprClass:
428     K = CXCursor_OMPArraySectionExpr;
429     break;
430 
431   case Stmt::OMPArrayShapingExprClass:
432     K = CXCursor_OMPArrayShapingExpr;
433     break;
434 
435   case Stmt::OMPIteratorExprClass:
436     K = CXCursor_OMPIteratorExpr;
437     break;
438 
439   case Stmt::BinaryOperatorClass:
440     K = CXCursor_BinaryOperator;
441     break;
442 
443   case Stmt::CompoundAssignOperatorClass:
444     K = CXCursor_CompoundAssignOperator;
445     break;
446 
447   case Stmt::ConditionalOperatorClass:
448     K = CXCursor_ConditionalOperator;
449     break;
450 
451   case Stmt::CStyleCastExprClass:
452     K = CXCursor_CStyleCastExpr;
453     break;
454 
455   case Stmt::CompoundLiteralExprClass:
456     K = CXCursor_CompoundLiteralExpr;
457     break;
458 
459   case Stmt::InitListExprClass:
460     K = CXCursor_InitListExpr;
461     break;
462 
463   case Stmt::AddrLabelExprClass:
464     K = CXCursor_AddrLabelExpr;
465     break;
466 
467   case Stmt::StmtExprClass:
468     K = CXCursor_StmtExpr;
469     break;
470 
471   case Stmt::GenericSelectionExprClass:
472     K = CXCursor_GenericSelectionExpr;
473     break;
474 
475   case Stmt::GNUNullExprClass:
476     K = CXCursor_GNUNullExpr;
477     break;
478 
479   case Stmt::CXXStaticCastExprClass:
480     K = CXCursor_CXXStaticCastExpr;
481     break;
482 
483   case Stmt::CXXDynamicCastExprClass:
484     K = CXCursor_CXXDynamicCastExpr;
485     break;
486 
487   case Stmt::CXXReinterpretCastExprClass:
488     K = CXCursor_CXXReinterpretCastExpr;
489     break;
490 
491   case Stmt::CXXConstCastExprClass:
492     K = CXCursor_CXXConstCastExpr;
493     break;
494 
495   case Stmt::CXXFunctionalCastExprClass:
496     K = CXCursor_CXXFunctionalCastExpr;
497     break;
498 
499   case Stmt::CXXAddrspaceCastExprClass:
500     K = CXCursor_CXXAddrspaceCastExpr;
501     break;
502 
503   case Stmt::CXXTypeidExprClass:
504     K = CXCursor_CXXTypeidExpr;
505     break;
506 
507   case Stmt::CXXBoolLiteralExprClass:
508     K = CXCursor_CXXBoolLiteralExpr;
509     break;
510 
511   case Stmt::CXXNullPtrLiteralExprClass:
512     K = CXCursor_CXXNullPtrLiteralExpr;
513     break;
514 
515   case Stmt::CXXThisExprClass:
516     K = CXCursor_CXXThisExpr;
517     break;
518 
519   case Stmt::CXXThrowExprClass:
520     K = CXCursor_CXXThrowExpr;
521     break;
522 
523   case Stmt::CXXNewExprClass:
524     K = CXCursor_CXXNewExpr;
525     break;
526 
527   case Stmt::CXXDeleteExprClass:
528     K = CXCursor_CXXDeleteExpr;
529     break;
530 
531   case Stmt::ObjCStringLiteralClass:
532     K = CXCursor_ObjCStringLiteral;
533     break;
534 
535   case Stmt::ObjCEncodeExprClass:
536     K = CXCursor_ObjCEncodeExpr;
537     break;
538 
539   case Stmt::ObjCSelectorExprClass:
540     K = CXCursor_ObjCSelectorExpr;
541     break;
542 
543   case Stmt::ObjCProtocolExprClass:
544     K = CXCursor_ObjCProtocolExpr;
545     break;
546 
547   case Stmt::ObjCBoolLiteralExprClass:
548     K = CXCursor_ObjCBoolLiteralExpr;
549     break;
550 
551   case Stmt::ObjCAvailabilityCheckExprClass:
552     K = CXCursor_ObjCAvailabilityCheckExpr;
553     break;
554 
555   case Stmt::ObjCBridgedCastExprClass:
556     K = CXCursor_ObjCBridgedCastExpr;
557     break;
558 
559   case Stmt::BlockExprClass:
560     K = CXCursor_BlockExpr;
561     break;
562 
563   case Stmt::PackExpansionExprClass:
564     K = CXCursor_PackExpansionExpr;
565     break;
566 
567   case Stmt::SizeOfPackExprClass:
568     K = CXCursor_SizeOfPackExpr;
569     break;
570 
571   case Stmt::DeclRefExprClass:
572     if (const ImplicitParamDecl *IPD = dyn_cast_or_null<ImplicitParamDecl>(
573             cast<DeclRefExpr>(S)->getDecl())) {
574       if (const ObjCMethodDecl *MD =
575               dyn_cast<ObjCMethodDecl>(IPD->getDeclContext())) {
576         if (MD->getSelfDecl() == IPD) {
577           K = CXCursor_ObjCSelfExpr;
578           break;
579         }
580       }
581     }
582 
583     K = CXCursor_DeclRefExpr;
584     break;
585 
586   case Stmt::DependentScopeDeclRefExprClass:
587   case Stmt::SubstNonTypeTemplateParmExprClass:
588   case Stmt::SubstNonTypeTemplateParmPackExprClass:
589   case Stmt::FunctionParmPackExprClass:
590   case Stmt::UnresolvedLookupExprClass:
591   case Stmt::TypoExprClass: // A typo could actually be a DeclRef or a MemberRef
592     K = CXCursor_DeclRefExpr;
593     break;
594 
595   case Stmt::CXXDependentScopeMemberExprClass:
596   case Stmt::CXXPseudoDestructorExprClass:
597   case Stmt::MemberExprClass:
598   case Stmt::MSPropertyRefExprClass:
599   case Stmt::ObjCIsaExprClass:
600   case Stmt::ObjCIvarRefExprClass:
601   case Stmt::ObjCPropertyRefExprClass:
602   case Stmt::UnresolvedMemberExprClass:
603     K = CXCursor_MemberRefExpr;
604     break;
605 
606   case Stmt::CallExprClass:
607   case Stmt::CXXOperatorCallExprClass:
608   case Stmt::CXXMemberCallExprClass:
609   case Stmt::CUDAKernelCallExprClass:
610   case Stmt::CXXConstructExprClass:
611   case Stmt::CXXInheritedCtorInitExprClass:
612   case Stmt::CXXTemporaryObjectExprClass:
613   case Stmt::CXXUnresolvedConstructExprClass:
614   case Stmt::UserDefinedLiteralClass:
615     K = CXCursor_CallExpr;
616     break;
617 
618   case Stmt::LambdaExprClass:
619     K = CXCursor_LambdaExpr;
620     break;
621 
622   case Stmt::ObjCMessageExprClass: {
623     K = CXCursor_ObjCMessageExpr;
624     int SelectorIdIndex = -1;
625     // Check if cursor points to a selector id.
626     if (RegionOfInterest.isValid() &&
627         RegionOfInterest.getBegin() == RegionOfInterest.getEnd()) {
628       SmallVector<SourceLocation, 16> SelLocs;
629       cast<ObjCMessageExpr>(S)->getSelectorLocs(SelLocs);
630       SmallVectorImpl<SourceLocation>::iterator I =
631           llvm::find(SelLocs, RegionOfInterest.getBegin());
632       if (I != SelLocs.end())
633         SelectorIdIndex = I - SelLocs.begin();
634     }
635     CXCursor C = {K, 0, {Parent, S, TU}};
636     return getSelectorIdentifierCursor(SelectorIdIndex, C);
637   }
638 
639   case Stmt::MSDependentExistsStmtClass:
640     K = CXCursor_UnexposedStmt;
641     break;
642   case Stmt::OMPParallelDirectiveClass:
643     K = CXCursor_OMPParallelDirective;
644     break;
645   case Stmt::OMPSimdDirectiveClass:
646     K = CXCursor_OMPSimdDirective;
647     break;
648   case Stmt::OMPTileDirectiveClass:
649     K = CXCursor_OMPTileDirective;
650     break;
651   case Stmt::OMPForDirectiveClass:
652     K = CXCursor_OMPForDirective;
653     break;
654   case Stmt::OMPForSimdDirectiveClass:
655     K = CXCursor_OMPForSimdDirective;
656     break;
657   case Stmt::OMPSectionsDirectiveClass:
658     K = CXCursor_OMPSectionsDirective;
659     break;
660   case Stmt::OMPSectionDirectiveClass:
661     K = CXCursor_OMPSectionDirective;
662     break;
663   case Stmt::OMPSingleDirectiveClass:
664     K = CXCursor_OMPSingleDirective;
665     break;
666   case Stmt::OMPMasterDirectiveClass:
667     K = CXCursor_OMPMasterDirective;
668     break;
669   case Stmt::OMPCriticalDirectiveClass:
670     K = CXCursor_OMPCriticalDirective;
671     break;
672   case Stmt::OMPParallelForDirectiveClass:
673     K = CXCursor_OMPParallelForDirective;
674     break;
675   case Stmt::OMPParallelForSimdDirectiveClass:
676     K = CXCursor_OMPParallelForSimdDirective;
677     break;
678   case Stmt::OMPParallelMasterDirectiveClass:
679     K = CXCursor_OMPParallelMasterDirective;
680     break;
681   case Stmt::OMPParallelSectionsDirectiveClass:
682     K = CXCursor_OMPParallelSectionsDirective;
683     break;
684   case Stmt::OMPTaskDirectiveClass:
685     K = CXCursor_OMPTaskDirective;
686     break;
687   case Stmt::OMPTaskyieldDirectiveClass:
688     K = CXCursor_OMPTaskyieldDirective;
689     break;
690   case Stmt::OMPBarrierDirectiveClass:
691     K = CXCursor_OMPBarrierDirective;
692     break;
693   case Stmt::OMPTaskwaitDirectiveClass:
694     K = CXCursor_OMPTaskwaitDirective;
695     break;
696   case Stmt::OMPTaskgroupDirectiveClass:
697     K = CXCursor_OMPTaskgroupDirective;
698     break;
699   case Stmt::OMPFlushDirectiveClass:
700     K = CXCursor_OMPFlushDirective;
701     break;
702   case Stmt::OMPDepobjDirectiveClass:
703     K = CXCursor_OMPDepobjDirective;
704     break;
705   case Stmt::OMPScanDirectiveClass:
706     K = CXCursor_OMPScanDirective;
707     break;
708   case Stmt::OMPOrderedDirectiveClass:
709     K = CXCursor_OMPOrderedDirective;
710     break;
711   case Stmt::OMPAtomicDirectiveClass:
712     K = CXCursor_OMPAtomicDirective;
713     break;
714   case Stmt::OMPTargetDirectiveClass:
715     K = CXCursor_OMPTargetDirective;
716     break;
717   case Stmt::OMPTargetDataDirectiveClass:
718     K = CXCursor_OMPTargetDataDirective;
719     break;
720   case Stmt::OMPTargetEnterDataDirectiveClass:
721     K = CXCursor_OMPTargetEnterDataDirective;
722     break;
723   case Stmt::OMPTargetExitDataDirectiveClass:
724     K = CXCursor_OMPTargetExitDataDirective;
725     break;
726   case Stmt::OMPTargetParallelDirectiveClass:
727     K = CXCursor_OMPTargetParallelDirective;
728     break;
729   case Stmt::OMPTargetParallelForDirectiveClass:
730     K = CXCursor_OMPTargetParallelForDirective;
731     break;
732   case Stmt::OMPTargetUpdateDirectiveClass:
733     K = CXCursor_OMPTargetUpdateDirective;
734     break;
735   case Stmt::OMPTeamsDirectiveClass:
736     K = CXCursor_OMPTeamsDirective;
737     break;
738   case Stmt::OMPCancellationPointDirectiveClass:
739     K = CXCursor_OMPCancellationPointDirective;
740     break;
741   case Stmt::OMPCancelDirectiveClass:
742     K = CXCursor_OMPCancelDirective;
743     break;
744   case Stmt::OMPTaskLoopDirectiveClass:
745     K = CXCursor_OMPTaskLoopDirective;
746     break;
747   case Stmt::OMPTaskLoopSimdDirectiveClass:
748     K = CXCursor_OMPTaskLoopSimdDirective;
749     break;
750   case Stmt::OMPMasterTaskLoopDirectiveClass:
751     K = CXCursor_OMPMasterTaskLoopDirective;
752     break;
753   case Stmt::OMPMasterTaskLoopSimdDirectiveClass:
754     K = CXCursor_OMPMasterTaskLoopSimdDirective;
755     break;
756   case Stmt::OMPParallelMasterTaskLoopDirectiveClass:
757     K = CXCursor_OMPParallelMasterTaskLoopDirective;
758     break;
759   case Stmt::OMPParallelMasterTaskLoopSimdDirectiveClass:
760     K = CXCursor_OMPParallelMasterTaskLoopSimdDirective;
761     break;
762   case Stmt::OMPDistributeDirectiveClass:
763     K = CXCursor_OMPDistributeDirective;
764     break;
765   case Stmt::OMPDistributeParallelForDirectiveClass:
766     K = CXCursor_OMPDistributeParallelForDirective;
767     break;
768   case Stmt::OMPDistributeParallelForSimdDirectiveClass:
769     K = CXCursor_OMPDistributeParallelForSimdDirective;
770     break;
771   case Stmt::OMPDistributeSimdDirectiveClass:
772     K = CXCursor_OMPDistributeSimdDirective;
773     break;
774   case Stmt::OMPTargetParallelForSimdDirectiveClass:
775     K = CXCursor_OMPTargetParallelForSimdDirective;
776     break;
777   case Stmt::OMPTargetSimdDirectiveClass:
778     K = CXCursor_OMPTargetSimdDirective;
779     break;
780   case Stmt::OMPTeamsDistributeDirectiveClass:
781     K = CXCursor_OMPTeamsDistributeDirective;
782     break;
783   case Stmt::OMPTeamsDistributeSimdDirectiveClass:
784     K = CXCursor_OMPTeamsDistributeSimdDirective;
785     break;
786   case Stmt::OMPTeamsDistributeParallelForSimdDirectiveClass:
787     K = CXCursor_OMPTeamsDistributeParallelForSimdDirective;
788     break;
789   case Stmt::OMPTeamsDistributeParallelForDirectiveClass:
790     K = CXCursor_OMPTeamsDistributeParallelForDirective;
791     break;
792   case Stmt::OMPTargetTeamsDirectiveClass:
793     K = CXCursor_OMPTargetTeamsDirective;
794     break;
795   case Stmt::OMPTargetTeamsDistributeDirectiveClass:
796     K = CXCursor_OMPTargetTeamsDistributeDirective;
797     break;
798   case Stmt::OMPTargetTeamsDistributeParallelForDirectiveClass:
799     K = CXCursor_OMPTargetTeamsDistributeParallelForDirective;
800     break;
801   case Stmt::OMPTargetTeamsDistributeParallelForSimdDirectiveClass:
802     K = CXCursor_OMPTargetTeamsDistributeParallelForSimdDirective;
803     break;
804   case Stmt::OMPTargetTeamsDistributeSimdDirectiveClass:
805     K = CXCursor_OMPTargetTeamsDistributeSimdDirective;
806     break;
807   case Stmt::BuiltinBitCastExprClass:
808     K = CXCursor_BuiltinBitCastExpr;
809   }
810 
811   CXCursor C = {K, 0, {Parent, S, TU}};
812   return C;
813 }
814 
815 CXCursor cxcursor::MakeCursorObjCSuperClassRef(ObjCInterfaceDecl *Super,
816                                                SourceLocation Loc,
817                                                CXTranslationUnit TU) {
818   assert(Super && TU && "Invalid arguments!");
819   void *RawLoc = Loc.getPtrEncoding();
820   CXCursor C = {CXCursor_ObjCSuperClassRef, 0, {Super, RawLoc, TU}};
821   return C;
822 }
823 
824 std::pair<const ObjCInterfaceDecl *, SourceLocation>
825 cxcursor::getCursorObjCSuperClassRef(CXCursor C) {
826   assert(C.kind == CXCursor_ObjCSuperClassRef);
827   return std::make_pair(static_cast<const ObjCInterfaceDecl *>(C.data[0]),
828                         SourceLocation::getFromPtrEncoding(C.data[1]));
829 }
830 
831 CXCursor cxcursor::MakeCursorObjCProtocolRef(const ObjCProtocolDecl *Proto,
832                                              SourceLocation Loc,
833                                              CXTranslationUnit TU) {
834   assert(Proto && TU && "Invalid arguments!");
835   void *RawLoc = Loc.getPtrEncoding();
836   CXCursor C = {CXCursor_ObjCProtocolRef, 0, {Proto, RawLoc, TU}};
837   return C;
838 }
839 
840 std::pair<const ObjCProtocolDecl *, SourceLocation>
841 cxcursor::getCursorObjCProtocolRef(CXCursor C) {
842   assert(C.kind == CXCursor_ObjCProtocolRef);
843   return std::make_pair(static_cast<const ObjCProtocolDecl *>(C.data[0]),
844                         SourceLocation::getFromPtrEncoding(C.data[1]));
845 }
846 
847 CXCursor cxcursor::MakeCursorObjCClassRef(const ObjCInterfaceDecl *Class,
848                                           SourceLocation Loc,
849                                           CXTranslationUnit TU) {
850   // 'Class' can be null for invalid code.
851   if (!Class)
852     return MakeCXCursorInvalid(CXCursor_InvalidCode);
853   assert(TU && "Invalid arguments!");
854   void *RawLoc = Loc.getPtrEncoding();
855   CXCursor C = {CXCursor_ObjCClassRef, 0, {Class, RawLoc, TU}};
856   return C;
857 }
858 
859 std::pair<const ObjCInterfaceDecl *, SourceLocation>
860 cxcursor::getCursorObjCClassRef(CXCursor C) {
861   assert(C.kind == CXCursor_ObjCClassRef);
862   return std::make_pair(static_cast<const ObjCInterfaceDecl *>(C.data[0]),
863                         SourceLocation::getFromPtrEncoding(C.data[1]));
864 }
865 
866 CXCursor cxcursor::MakeCursorTypeRef(const TypeDecl *Type, SourceLocation Loc,
867                                      CXTranslationUnit TU) {
868   assert(Type && TU && "Invalid arguments!");
869   void *RawLoc = Loc.getPtrEncoding();
870   CXCursor C = {CXCursor_TypeRef, 0, {Type, RawLoc, TU}};
871   return C;
872 }
873 
874 std::pair<const TypeDecl *, SourceLocation>
875 cxcursor::getCursorTypeRef(CXCursor C) {
876   assert(C.kind == CXCursor_TypeRef);
877   return std::make_pair(static_cast<const TypeDecl *>(C.data[0]),
878                         SourceLocation::getFromPtrEncoding(C.data[1]));
879 }
880 
881 CXCursor cxcursor::MakeCursorTemplateRef(const TemplateDecl *Template,
882                                          SourceLocation Loc,
883                                          CXTranslationUnit TU) {
884   assert(Template && TU && "Invalid arguments!");
885   void *RawLoc = Loc.getPtrEncoding();
886   CXCursor C = {CXCursor_TemplateRef, 0, {Template, RawLoc, TU}};
887   return C;
888 }
889 
890 std::pair<const TemplateDecl *, SourceLocation>
891 cxcursor::getCursorTemplateRef(CXCursor C) {
892   assert(C.kind == CXCursor_TemplateRef);
893   return std::make_pair(static_cast<const TemplateDecl *>(C.data[0]),
894                         SourceLocation::getFromPtrEncoding(C.data[1]));
895 }
896 
897 CXCursor cxcursor::MakeCursorNamespaceRef(const NamedDecl *NS,
898                                           SourceLocation Loc,
899                                           CXTranslationUnit TU) {
900 
901   assert(NS && (isa<NamespaceDecl>(NS) || isa<NamespaceAliasDecl>(NS)) && TU &&
902          "Invalid arguments!");
903   void *RawLoc = Loc.getPtrEncoding();
904   CXCursor C = {CXCursor_NamespaceRef, 0, {NS, RawLoc, TU}};
905   return C;
906 }
907 
908 std::pair<const NamedDecl *, SourceLocation>
909 cxcursor::getCursorNamespaceRef(CXCursor C) {
910   assert(C.kind == CXCursor_NamespaceRef);
911   return std::make_pair(static_cast<const NamedDecl *>(C.data[0]),
912                         SourceLocation::getFromPtrEncoding(C.data[1]));
913 }
914 
915 CXCursor cxcursor::MakeCursorVariableRef(const VarDecl *Var, SourceLocation Loc,
916                                          CXTranslationUnit TU) {
917 
918   assert(Var && TU && "Invalid arguments!");
919   void *RawLoc = Loc.getPtrEncoding();
920   CXCursor C = {CXCursor_VariableRef, 0, {Var, RawLoc, TU}};
921   return C;
922 }
923 
924 std::pair<const VarDecl *, SourceLocation>
925 cxcursor::getCursorVariableRef(CXCursor C) {
926   assert(C.kind == CXCursor_VariableRef);
927   return std::make_pair(static_cast<const VarDecl *>(C.data[0]),
928                         SourceLocation::getFromPtrEncoding(C.data[1]));
929 }
930 
931 CXCursor cxcursor::MakeCursorMemberRef(const FieldDecl *Field,
932                                        SourceLocation Loc,
933                                        CXTranslationUnit TU) {
934 
935   assert(Field && TU && "Invalid arguments!");
936   void *RawLoc = Loc.getPtrEncoding();
937   CXCursor C = {CXCursor_MemberRef, 0, {Field, RawLoc, TU}};
938   return C;
939 }
940 
941 std::pair<const FieldDecl *, SourceLocation>
942 cxcursor::getCursorMemberRef(CXCursor C) {
943   assert(C.kind == CXCursor_MemberRef);
944   return std::make_pair(static_cast<const FieldDecl *>(C.data[0]),
945                         SourceLocation::getFromPtrEncoding(C.data[1]));
946 }
947 
948 CXCursor cxcursor::MakeCursorCXXBaseSpecifier(const CXXBaseSpecifier *B,
949                                               CXTranslationUnit TU) {
950   CXCursor C = {CXCursor_CXXBaseSpecifier, 0, {B, nullptr, TU}};
951   return C;
952 }
953 
954 const CXXBaseSpecifier *cxcursor::getCursorCXXBaseSpecifier(CXCursor C) {
955   assert(C.kind == CXCursor_CXXBaseSpecifier);
956   return static_cast<const CXXBaseSpecifier *>(C.data[0]);
957 }
958 
959 CXCursor cxcursor::MakePreprocessingDirectiveCursor(SourceRange Range,
960                                                     CXTranslationUnit TU) {
961   CXCursor C = {
962       CXCursor_PreprocessingDirective,
963       0,
964       {Range.getBegin().getPtrEncoding(), Range.getEnd().getPtrEncoding(), TU}};
965   return C;
966 }
967 
968 SourceRange cxcursor::getCursorPreprocessingDirective(CXCursor C) {
969   assert(C.kind == CXCursor_PreprocessingDirective);
970   SourceRange Range(SourceLocation::getFromPtrEncoding(C.data[0]),
971                     SourceLocation::getFromPtrEncoding(C.data[1]));
972   ASTUnit *TU = getCursorASTUnit(C);
973   return TU->mapRangeFromPreamble(Range);
974 }
975 
976 CXCursor cxcursor::MakeMacroDefinitionCursor(const MacroDefinitionRecord *MI,
977                                              CXTranslationUnit TU) {
978   CXCursor C = {CXCursor_MacroDefinition, 0, {MI, nullptr, TU}};
979   return C;
980 }
981 
982 const MacroDefinitionRecord *cxcursor::getCursorMacroDefinition(CXCursor C) {
983   assert(C.kind == CXCursor_MacroDefinition);
984   return static_cast<const MacroDefinitionRecord *>(C.data[0]);
985 }
986 
987 CXCursor cxcursor::MakeMacroExpansionCursor(MacroExpansion *MI,
988                                             CXTranslationUnit TU) {
989   CXCursor C = {CXCursor_MacroExpansion, 0, {MI, nullptr, TU}};
990   return C;
991 }
992 
993 CXCursor cxcursor::MakeMacroExpansionCursor(MacroDefinitionRecord *MI,
994                                             SourceLocation Loc,
995                                             CXTranslationUnit TU) {
996   assert(Loc.isValid());
997   CXCursor C = {CXCursor_MacroExpansion, 0, {MI, Loc.getPtrEncoding(), TU}};
998   return C;
999 }
1000 
1001 const IdentifierInfo *cxcursor::MacroExpansionCursor::getName() const {
1002   if (isPseudo())
1003     return getAsMacroDefinition()->getName();
1004   return getAsMacroExpansion()->getName();
1005 }
1006 const MacroDefinitionRecord *
1007 cxcursor::MacroExpansionCursor::getDefinition() const {
1008   if (isPseudo())
1009     return getAsMacroDefinition();
1010   return getAsMacroExpansion()->getDefinition();
1011 }
1012 SourceRange cxcursor::MacroExpansionCursor::getSourceRange() const {
1013   if (isPseudo())
1014     return getPseudoLoc();
1015   return getAsMacroExpansion()->getSourceRange();
1016 }
1017 
1018 CXCursor cxcursor::MakeInclusionDirectiveCursor(InclusionDirective *ID,
1019                                                 CXTranslationUnit TU) {
1020   CXCursor C = {CXCursor_InclusionDirective, 0, {ID, nullptr, TU}};
1021   return C;
1022 }
1023 
1024 const InclusionDirective *cxcursor::getCursorInclusionDirective(CXCursor C) {
1025   assert(C.kind == CXCursor_InclusionDirective);
1026   return static_cast<const InclusionDirective *>(C.data[0]);
1027 }
1028 
1029 CXCursor cxcursor::MakeCursorLabelRef(LabelStmt *Label, SourceLocation Loc,
1030                                       CXTranslationUnit TU) {
1031 
1032   assert(Label && TU && "Invalid arguments!");
1033   void *RawLoc = Loc.getPtrEncoding();
1034   CXCursor C = {CXCursor_LabelRef, 0, {Label, RawLoc, TU}};
1035   return C;
1036 }
1037 
1038 std::pair<const LabelStmt *, SourceLocation>
1039 cxcursor::getCursorLabelRef(CXCursor C) {
1040   assert(C.kind == CXCursor_LabelRef);
1041   return std::make_pair(static_cast<const LabelStmt *>(C.data[0]),
1042                         SourceLocation::getFromPtrEncoding(C.data[1]));
1043 }
1044 
1045 CXCursor cxcursor::MakeCursorOverloadedDeclRef(const OverloadExpr *E,
1046                                                CXTranslationUnit TU) {
1047   assert(E && TU && "Invalid arguments!");
1048   OverloadedDeclRefStorage Storage(E);
1049   void *RawLoc = E->getNameLoc().getPtrEncoding();
1050   CXCursor C = {
1051       CXCursor_OverloadedDeclRef, 0, {Storage.getOpaqueValue(), RawLoc, TU}};
1052   return C;
1053 }
1054 
1055 CXCursor cxcursor::MakeCursorOverloadedDeclRef(const Decl *D,
1056                                                SourceLocation Loc,
1057                                                CXTranslationUnit TU) {
1058   assert(D && TU && "Invalid arguments!");
1059   void *RawLoc = Loc.getPtrEncoding();
1060   OverloadedDeclRefStorage Storage(D);
1061   CXCursor C = {
1062       CXCursor_OverloadedDeclRef, 0, {Storage.getOpaqueValue(), RawLoc, TU}};
1063   return C;
1064 }
1065 
1066 CXCursor cxcursor::MakeCursorOverloadedDeclRef(TemplateName Name,
1067                                                SourceLocation Loc,
1068                                                CXTranslationUnit TU) {
1069   assert(Name.getAsOverloadedTemplate() && TU && "Invalid arguments!");
1070   void *RawLoc = Loc.getPtrEncoding();
1071   OverloadedDeclRefStorage Storage(Name.getAsOverloadedTemplate());
1072   CXCursor C = {
1073       CXCursor_OverloadedDeclRef, 0, {Storage.getOpaqueValue(), RawLoc, TU}};
1074   return C;
1075 }
1076 
1077 std::pair<cxcursor::OverloadedDeclRefStorage, SourceLocation>
1078 cxcursor::getCursorOverloadedDeclRef(CXCursor C) {
1079   assert(C.kind == CXCursor_OverloadedDeclRef);
1080   return std::make_pair(OverloadedDeclRefStorage::getFromOpaqueValue(
1081                             const_cast<void *>(C.data[0])),
1082                         SourceLocation::getFromPtrEncoding(C.data[1]));
1083 }
1084 
1085 const Decl *cxcursor::getCursorDecl(CXCursor Cursor) {
1086   return static_cast<const Decl *>(Cursor.data[0]);
1087 }
1088 
1089 const Expr *cxcursor::getCursorExpr(CXCursor Cursor) {
1090   return dyn_cast_or_null<Expr>(getCursorStmt(Cursor));
1091 }
1092 
1093 const Stmt *cxcursor::getCursorStmt(CXCursor Cursor) {
1094   if (Cursor.kind == CXCursor_ObjCSuperClassRef ||
1095       Cursor.kind == CXCursor_ObjCProtocolRef ||
1096       Cursor.kind == CXCursor_ObjCClassRef)
1097     return nullptr;
1098 
1099   return static_cast<const Stmt *>(Cursor.data[1]);
1100 }
1101 
1102 const Attr *cxcursor::getCursorAttr(CXCursor Cursor) {
1103   return static_cast<const Attr *>(Cursor.data[1]);
1104 }
1105 
1106 ASTContext &cxcursor::getCursorContext(CXCursor Cursor) {
1107   return getCursorASTUnit(Cursor)->getASTContext();
1108 }
1109 
1110 ASTUnit *cxcursor::getCursorASTUnit(CXCursor Cursor) {
1111   CXTranslationUnit TU = getCursorTU(Cursor);
1112   if (!TU)
1113     return nullptr;
1114   return cxtu::getASTUnit(TU);
1115 }
1116 
1117 CXTranslationUnit cxcursor::getCursorTU(CXCursor Cursor) {
1118   return static_cast<CXTranslationUnit>(const_cast<void *>(Cursor.data[2]));
1119 }
1120 
1121 void cxcursor::getOverriddenCursors(CXCursor cursor,
1122                                     SmallVectorImpl<CXCursor> &overridden) {
1123   assert(clang_isDeclaration(cursor.kind));
1124   const NamedDecl *D = dyn_cast_or_null<NamedDecl>(getCursorDecl(cursor));
1125   if (!D)
1126     return;
1127 
1128   CXTranslationUnit TU = getCursorTU(cursor);
1129   SmallVector<const NamedDecl *, 8> OverDecls;
1130   D->getASTContext().getOverriddenMethods(D, OverDecls);
1131 
1132   for (SmallVectorImpl<const NamedDecl *>::iterator I = OverDecls.begin(),
1133                                                     E = OverDecls.end();
1134        I != E; ++I) {
1135     overridden.push_back(MakeCXCursor(*I, TU));
1136   }
1137 }
1138 
1139 std::pair<int, SourceLocation>
1140 cxcursor::getSelectorIdentifierIndexAndLoc(CXCursor cursor) {
1141   if (cursor.kind == CXCursor_ObjCMessageExpr) {
1142     if (cursor.xdata != -1)
1143       return std::make_pair(cursor.xdata,
1144                             cast<ObjCMessageExpr>(getCursorExpr(cursor))
1145                                 ->getSelectorLoc(cursor.xdata));
1146   } else if (cursor.kind == CXCursor_ObjCClassMethodDecl ||
1147              cursor.kind == CXCursor_ObjCInstanceMethodDecl) {
1148     if (cursor.xdata != -1)
1149       return std::make_pair(cursor.xdata,
1150                             cast<ObjCMethodDecl>(getCursorDecl(cursor))
1151                                 ->getSelectorLoc(cursor.xdata));
1152   }
1153 
1154   return std::make_pair(-1, SourceLocation());
1155 }
1156 
1157 CXCursor cxcursor::getSelectorIdentifierCursor(int SelIdx, CXCursor cursor) {
1158   CXCursor newCursor = cursor;
1159 
1160   if (cursor.kind == CXCursor_ObjCMessageExpr) {
1161     if (SelIdx == -1 ||
1162         unsigned(SelIdx) >=
1163             cast<ObjCMessageExpr>(getCursorExpr(cursor))->getNumSelectorLocs())
1164       newCursor.xdata = -1;
1165     else
1166       newCursor.xdata = SelIdx;
1167   } else if (cursor.kind == CXCursor_ObjCClassMethodDecl ||
1168              cursor.kind == CXCursor_ObjCInstanceMethodDecl) {
1169     if (SelIdx == -1 ||
1170         unsigned(SelIdx) >=
1171             cast<ObjCMethodDecl>(getCursorDecl(cursor))->getNumSelectorLocs())
1172       newCursor.xdata = -1;
1173     else
1174       newCursor.xdata = SelIdx;
1175   }
1176 
1177   return newCursor;
1178 }
1179 
1180 CXCursor cxcursor::getTypeRefCursor(CXCursor cursor) {
1181   if (cursor.kind != CXCursor_CallExpr)
1182     return cursor;
1183 
1184   if (cursor.xdata == 0)
1185     return cursor;
1186 
1187   const Expr *E = getCursorExpr(cursor);
1188   TypeSourceInfo *Type = nullptr;
1189   if (const CXXUnresolvedConstructExpr *UnCtor =
1190           dyn_cast<CXXUnresolvedConstructExpr>(E)) {
1191     Type = UnCtor->getTypeSourceInfo();
1192   } else if (const CXXTemporaryObjectExpr *Tmp =
1193                  dyn_cast<CXXTemporaryObjectExpr>(E)) {
1194     Type = Tmp->getTypeSourceInfo();
1195   }
1196 
1197   if (!Type)
1198     return cursor;
1199 
1200   CXTranslationUnit TU = getCursorTU(cursor);
1201   QualType Ty = Type->getType();
1202   TypeLoc TL = Type->getTypeLoc();
1203   SourceLocation Loc = TL.getBeginLoc();
1204 
1205   if (const ElaboratedType *ElabT = Ty->getAs<ElaboratedType>()) {
1206     Ty = ElabT->getNamedType();
1207     ElaboratedTypeLoc ElabTL = TL.castAs<ElaboratedTypeLoc>();
1208     Loc = ElabTL.getNamedTypeLoc().getBeginLoc();
1209   }
1210 
1211   if (const TypedefType *Typedef = Ty->getAs<TypedefType>())
1212     return MakeCursorTypeRef(Typedef->getDecl(), Loc, TU);
1213   if (const TagType *Tag = Ty->getAs<TagType>())
1214     return MakeCursorTypeRef(Tag->getDecl(), Loc, TU);
1215   if (const TemplateTypeParmType *TemplP = Ty->getAs<TemplateTypeParmType>())
1216     return MakeCursorTypeRef(TemplP->getDecl(), Loc, TU);
1217 
1218   return cursor;
1219 }
1220 
1221 bool cxcursor::operator==(CXCursor X, CXCursor Y) {
1222   return X.kind == Y.kind && X.data[0] == Y.data[0] && X.data[1] == Y.data[1] &&
1223          X.data[2] == Y.data[2];
1224 }
1225 
1226 // FIXME: Remove once we can model DeclGroups and their appropriate ranges
1227 // properly in the ASTs.
1228 bool cxcursor::isFirstInDeclGroup(CXCursor C) {
1229   assert(clang_isDeclaration(C.kind));
1230   return ((uintptr_t)(C.data[1])) != 0;
1231 }
1232 
1233 //===----------------------------------------------------------------------===//
1234 // libclang CXCursor APIs
1235 //===----------------------------------------------------------------------===//
1236 
1237 int clang_Cursor_isNull(CXCursor cursor) {
1238   return clang_equalCursors(cursor, clang_getNullCursor());
1239 }
1240 
1241 CXTranslationUnit clang_Cursor_getTranslationUnit(CXCursor cursor) {
1242   return getCursorTU(cursor);
1243 }
1244 
1245 int clang_Cursor_getNumArguments(CXCursor C) {
1246   if (clang_isDeclaration(C.kind)) {
1247     const Decl *D = cxcursor::getCursorDecl(C);
1248     if (const ObjCMethodDecl *MD = dyn_cast_or_null<ObjCMethodDecl>(D))
1249       return MD->param_size();
1250     if (const FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(D))
1251       return FD->param_size();
1252   }
1253 
1254   if (clang_isExpression(C.kind)) {
1255     const Expr *E = cxcursor::getCursorExpr(C);
1256     if (const CallExpr *CE = dyn_cast<CallExpr>(E)) {
1257       return CE->getNumArgs();
1258     }
1259     if (const CXXConstructExpr *CE = dyn_cast<CXXConstructExpr>(E)) {
1260       return CE->getNumArgs();
1261     }
1262   }
1263 
1264   return -1;
1265 }
1266 
1267 CXCursor clang_Cursor_getArgument(CXCursor C, unsigned i) {
1268   if (clang_isDeclaration(C.kind)) {
1269     const Decl *D = cxcursor::getCursorDecl(C);
1270     if (const ObjCMethodDecl *MD = dyn_cast_or_null<ObjCMethodDecl>(D)) {
1271       if (i < MD->param_size())
1272         return cxcursor::MakeCXCursor(MD->parameters()[i],
1273                                       cxcursor::getCursorTU(C));
1274     } else if (const FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(D)) {
1275       if (i < FD->param_size())
1276         return cxcursor::MakeCXCursor(FD->parameters()[i],
1277                                       cxcursor::getCursorTU(C));
1278     }
1279   }
1280 
1281   if (clang_isExpression(C.kind)) {
1282     const Expr *E = cxcursor::getCursorExpr(C);
1283     if (const CallExpr *CE = dyn_cast<CallExpr>(E)) {
1284       if (i < CE->getNumArgs()) {
1285         return cxcursor::MakeCXCursor(CE->getArg(i), getCursorDecl(C),
1286                                       cxcursor::getCursorTU(C));
1287       }
1288     }
1289     if (const CXXConstructExpr *CE = dyn_cast<CXXConstructExpr>(E)) {
1290       if (i < CE->getNumArgs()) {
1291         return cxcursor::MakeCXCursor(CE->getArg(i), getCursorDecl(C),
1292                                       cxcursor::getCursorTU(C));
1293       }
1294     }
1295   }
1296 
1297   return clang_getNullCursor();
1298 }
1299 
1300 int clang_Cursor_getNumTemplateArguments(CXCursor C) {
1301   if (clang_getCursorKind(C) != CXCursor_FunctionDecl) {
1302     return -1;
1303   }
1304 
1305   const FunctionDecl *FD =
1306       llvm::dyn_cast_or_null<clang::FunctionDecl>(getCursorDecl(C));
1307   if (!FD) {
1308     return -1;
1309   }
1310 
1311   const FunctionTemplateSpecializationInfo *SpecInfo =
1312       FD->getTemplateSpecializationInfo();
1313   if (!SpecInfo) {
1314     return -1;
1315   }
1316 
1317   return SpecInfo->TemplateArguments->size();
1318 }
1319 
1320 enum CXGetTemplateArgumentStatus {
1321   /** The operation completed successfully */
1322   CXGetTemplateArgumentStatus_Success = 0,
1323 
1324   /** The specified cursor did not represent a FunctionDecl. */
1325   CXGetTemplateArgumentStatus_CursorNotFunctionDecl = -1,
1326 
1327   /** The specified cursor was not castable to a FunctionDecl. */
1328   CXGetTemplateArgumentStatus_BadFunctionDeclCast = -2,
1329 
1330   /** A NULL FunctionTemplateSpecializationInfo was retrieved. */
1331   CXGetTemplateArgumentStatus_NullTemplSpecInfo = -3,
1332 
1333   /** An invalid (OOB) argument index was specified */
1334   CXGetTemplateArgumentStatus_InvalidIndex = -4
1335 };
1336 
1337 static int clang_Cursor_getTemplateArgument(CXCursor C, unsigned I,
1338                                             TemplateArgument *TA) {
1339   if (clang_getCursorKind(C) != CXCursor_FunctionDecl) {
1340     return CXGetTemplateArgumentStatus_CursorNotFunctionDecl;
1341   }
1342 
1343   const FunctionDecl *FD =
1344       llvm::dyn_cast_or_null<clang::FunctionDecl>(getCursorDecl(C));
1345   if (!FD) {
1346     return CXGetTemplateArgumentStatus_BadFunctionDeclCast;
1347   }
1348 
1349   const FunctionTemplateSpecializationInfo *SpecInfo =
1350       FD->getTemplateSpecializationInfo();
1351   if (!SpecInfo) {
1352     return CXGetTemplateArgumentStatus_NullTemplSpecInfo;
1353   }
1354 
1355   if (I >= SpecInfo->TemplateArguments->size()) {
1356     return CXGetTemplateArgumentStatus_InvalidIndex;
1357   }
1358 
1359   *TA = SpecInfo->TemplateArguments->get(I);
1360   return 0;
1361 }
1362 
1363 enum CXTemplateArgumentKind clang_Cursor_getTemplateArgumentKind(CXCursor C,
1364                                                                  unsigned I) {
1365   TemplateArgument TA;
1366   if (clang_Cursor_getTemplateArgument(C, I, &TA)) {
1367     return CXTemplateArgumentKind_Invalid;
1368   }
1369 
1370   switch (TA.getKind()) {
1371   case TemplateArgument::Null:
1372     return CXTemplateArgumentKind_Null;
1373   case TemplateArgument::Type:
1374     return CXTemplateArgumentKind_Type;
1375   case TemplateArgument::Declaration:
1376     return CXTemplateArgumentKind_Declaration;
1377   case TemplateArgument::NullPtr:
1378     return CXTemplateArgumentKind_NullPtr;
1379   case TemplateArgument::Integral:
1380     return CXTemplateArgumentKind_Integral;
1381   case TemplateArgument::Template:
1382     return CXTemplateArgumentKind_Template;
1383   case TemplateArgument::TemplateExpansion:
1384     return CXTemplateArgumentKind_TemplateExpansion;
1385   case TemplateArgument::Expression:
1386     return CXTemplateArgumentKind_Expression;
1387   case TemplateArgument::Pack:
1388     return CXTemplateArgumentKind_Pack;
1389   }
1390 
1391   return CXTemplateArgumentKind_Invalid;
1392 }
1393 
1394 CXType clang_Cursor_getTemplateArgumentType(CXCursor C, unsigned I) {
1395   TemplateArgument TA;
1396   if (clang_Cursor_getTemplateArgument(C, I, &TA) !=
1397       CXGetTemplateArgumentStatus_Success) {
1398     return cxtype::MakeCXType(QualType(), getCursorTU(C));
1399   }
1400 
1401   if (TA.getKind() != TemplateArgument::Type) {
1402     return cxtype::MakeCXType(QualType(), getCursorTU(C));
1403   }
1404 
1405   return cxtype::MakeCXType(TA.getAsType(), getCursorTU(C));
1406 }
1407 
1408 long long clang_Cursor_getTemplateArgumentValue(CXCursor C, unsigned I) {
1409   TemplateArgument TA;
1410   if (clang_Cursor_getTemplateArgument(C, I, &TA) !=
1411       CXGetTemplateArgumentStatus_Success) {
1412     assert(0 && "Unable to retrieve TemplateArgument");
1413     return 0;
1414   }
1415 
1416   if (TA.getKind() != TemplateArgument::Integral) {
1417     assert(0 && "Passed template argument is not Integral");
1418     return 0;
1419   }
1420 
1421   return TA.getAsIntegral().getSExtValue();
1422 }
1423 
1424 unsigned long long clang_Cursor_getTemplateArgumentUnsignedValue(CXCursor C,
1425                                                                  unsigned I) {
1426   TemplateArgument TA;
1427   if (clang_Cursor_getTemplateArgument(C, I, &TA) !=
1428       CXGetTemplateArgumentStatus_Success) {
1429     assert(0 && "Unable to retrieve TemplateArgument");
1430     return 0;
1431   }
1432 
1433   if (TA.getKind() != TemplateArgument::Integral) {
1434     assert(0 && "Passed template argument is not Integral");
1435     return 0;
1436   }
1437 
1438   return TA.getAsIntegral().getZExtValue();
1439 }
1440 
1441 //===----------------------------------------------------------------------===//
1442 // CXCursorSet.
1443 //===----------------------------------------------------------------------===//
1444 
1445 typedef llvm::DenseMap<CXCursor, unsigned> CXCursorSet_Impl;
1446 
1447 static inline CXCursorSet packCXCursorSet(CXCursorSet_Impl *setImpl) {
1448   return (CXCursorSet)setImpl;
1449 }
1450 static inline CXCursorSet_Impl *unpackCXCursorSet(CXCursorSet set) {
1451   return (CXCursorSet_Impl *)set;
1452 }
1453 namespace llvm {
1454 template <> struct DenseMapInfo<CXCursor> {
1455 public:
1456   static inline CXCursor getEmptyKey() {
1457     return MakeCXCursorInvalid(CXCursor_InvalidFile);
1458   }
1459   static inline CXCursor getTombstoneKey() {
1460     return MakeCXCursorInvalid(CXCursor_NoDeclFound);
1461   }
1462   static inline unsigned getHashValue(const CXCursor &cursor) {
1463     return llvm::DenseMapInfo<std::pair<const void *, const void *>>::
1464         getHashValue(std::make_pair(cursor.data[0], cursor.data[1]));
1465   }
1466   static inline bool isEqual(const CXCursor &x, const CXCursor &y) {
1467     return x.kind == y.kind && x.data[0] == y.data[0] && x.data[1] == y.data[1];
1468   }
1469 };
1470 } // namespace llvm
1471 
1472 CXCursorSet clang_createCXCursorSet() {
1473   return packCXCursorSet(new CXCursorSet_Impl());
1474 }
1475 
1476 void clang_disposeCXCursorSet(CXCursorSet set) {
1477   delete unpackCXCursorSet(set);
1478 }
1479 
1480 unsigned clang_CXCursorSet_contains(CXCursorSet set, CXCursor cursor) {
1481   CXCursorSet_Impl *setImpl = unpackCXCursorSet(set);
1482   if (!setImpl)
1483     return 0;
1484   return setImpl->find(cursor) != setImpl->end();
1485 }
1486 
1487 unsigned clang_CXCursorSet_insert(CXCursorSet set, CXCursor cursor) {
1488   // Do not insert invalid cursors into the set.
1489   if (cursor.kind >= CXCursor_FirstInvalid &&
1490       cursor.kind <= CXCursor_LastInvalid)
1491     return 1;
1492 
1493   CXCursorSet_Impl *setImpl = unpackCXCursorSet(set);
1494   if (!setImpl)
1495     return 1;
1496   unsigned &entry = (*setImpl)[cursor];
1497   unsigned flag = entry == 0 ? 1 : 0;
1498   entry = 1;
1499   return flag;
1500 }
1501 
1502 CXCompletionString clang_getCursorCompletionString(CXCursor cursor) {
1503   enum CXCursorKind kind = clang_getCursorKind(cursor);
1504   if (clang_isDeclaration(kind)) {
1505     const Decl *decl = getCursorDecl(cursor);
1506     if (const NamedDecl *namedDecl = dyn_cast_or_null<NamedDecl>(decl)) {
1507       ASTUnit *unit = getCursorASTUnit(cursor);
1508       CodeCompletionResult Result(namedDecl, CCP_Declaration);
1509       CodeCompletionString *String = Result.CreateCodeCompletionString(
1510           unit->getASTContext(), unit->getPreprocessor(),
1511           CodeCompletionContext::CCC_Other,
1512           unit->getCodeCompletionTUInfo().getAllocator(),
1513           unit->getCodeCompletionTUInfo(), true);
1514       return String;
1515     }
1516   } else if (kind == CXCursor_MacroDefinition) {
1517     const MacroDefinitionRecord *definition = getCursorMacroDefinition(cursor);
1518     const IdentifierInfo *Macro = definition->getName();
1519     ASTUnit *unit = getCursorASTUnit(cursor);
1520     CodeCompletionResult Result(
1521         Macro,
1522         unit->getPreprocessor().getMacroDefinition(Macro).getMacroInfo());
1523     CodeCompletionString *String = Result.CreateCodeCompletionString(
1524         unit->getASTContext(), unit->getPreprocessor(),
1525         CodeCompletionContext::CCC_Other,
1526         unit->getCodeCompletionTUInfo().getAllocator(),
1527         unit->getCodeCompletionTUInfo(), false);
1528     return String;
1529   }
1530   return nullptr;
1531 }
1532 
1533 namespace {
1534 struct OverridenCursorsPool {
1535   typedef SmallVector<CXCursor, 2> CursorVec;
1536   std::vector<CursorVec *> AllCursors;
1537   std::vector<CursorVec *> AvailableCursors;
1538 
1539   ~OverridenCursorsPool() {
1540     for (std::vector<CursorVec *>::iterator I = AllCursors.begin(),
1541                                             E = AllCursors.end();
1542          I != E; ++I) {
1543       delete *I;
1544     }
1545   }
1546 };
1547 } // namespace
1548 
1549 void *cxcursor::createOverridenCXCursorsPool() {
1550   return new OverridenCursorsPool();
1551 }
1552 
1553 void cxcursor::disposeOverridenCXCursorsPool(void *pool) {
1554   delete static_cast<OverridenCursorsPool *>(pool);
1555 }
1556 
1557 void clang_getOverriddenCursors(CXCursor cursor, CXCursor **overridden,
1558                                 unsigned *num_overridden) {
1559   if (overridden)
1560     *overridden = nullptr;
1561   if (num_overridden)
1562     *num_overridden = 0;
1563 
1564   CXTranslationUnit TU = cxcursor::getCursorTU(cursor);
1565 
1566   if (!overridden || !num_overridden || !TU)
1567     return;
1568 
1569   if (!clang_isDeclaration(cursor.kind))
1570     return;
1571 
1572   OverridenCursorsPool &pool =
1573       *static_cast<OverridenCursorsPool *>(TU->OverridenCursorsPool);
1574 
1575   OverridenCursorsPool::CursorVec *Vec = nullptr;
1576 
1577   if (!pool.AvailableCursors.empty()) {
1578     Vec = pool.AvailableCursors.back();
1579     pool.AvailableCursors.pop_back();
1580   } else {
1581     Vec = new OverridenCursorsPool::CursorVec();
1582     pool.AllCursors.push_back(Vec);
1583   }
1584 
1585   // Clear out the vector, but don't free the memory contents.  This
1586   // reduces malloc() traffic.
1587   Vec->clear();
1588 
1589   // Use the first entry to contain a back reference to the vector.
1590   // This is a complete hack.
1591   CXCursor backRefCursor = MakeCXCursorInvalid(CXCursor_InvalidFile, TU);
1592   backRefCursor.data[0] = Vec;
1593   assert(cxcursor::getCursorTU(backRefCursor) == TU);
1594   Vec->push_back(backRefCursor);
1595 
1596   // Get the overridden cursors.
1597   cxcursor::getOverriddenCursors(cursor, *Vec);
1598 
1599   // Did we get any overridden cursors?  If not, return Vec to the pool
1600   // of available cursor vectors.
1601   if (Vec->size() == 1) {
1602     pool.AvailableCursors.push_back(Vec);
1603     return;
1604   }
1605 
1606   // Now tell the caller about the overridden cursors.
1607   assert(Vec->size() > 1);
1608   *overridden = &((*Vec)[1]);
1609   *num_overridden = Vec->size() - 1;
1610 }
1611 
1612 void clang_disposeOverriddenCursors(CXCursor *overridden) {
1613   if (!overridden)
1614     return;
1615 
1616   // Use pointer arithmetic to get back the first faux entry
1617   // which has a back-reference to the TU and the vector.
1618   --overridden;
1619   OverridenCursorsPool::CursorVec *Vec =
1620       static_cast<OverridenCursorsPool::CursorVec *>(
1621           const_cast<void *>(overridden->data[0]));
1622   CXTranslationUnit TU = getCursorTU(*overridden);
1623 
1624   assert(Vec && TU);
1625 
1626   OverridenCursorsPool &pool =
1627       *static_cast<OverridenCursorsPool *>(TU->OverridenCursorsPool);
1628 
1629   pool.AvailableCursors.push_back(Vec);
1630 }
1631 
1632 int clang_Cursor_isDynamicCall(CXCursor C) {
1633   const Expr *E = nullptr;
1634   if (clang_isExpression(C.kind))
1635     E = getCursorExpr(C);
1636   if (!E)
1637     return 0;
1638 
1639   if (const ObjCMessageExpr *MsgE = dyn_cast<ObjCMessageExpr>(E)) {
1640     if (MsgE->getReceiverKind() != ObjCMessageExpr::Instance)
1641       return false;
1642     if (auto *RecE = dyn_cast<ObjCMessageExpr>(
1643             MsgE->getInstanceReceiver()->IgnoreParenCasts())) {
1644       if (RecE->getMethodFamily() == OMF_alloc)
1645         return false;
1646     }
1647     return true;
1648   }
1649 
1650   if (auto *PropRefE = dyn_cast<ObjCPropertyRefExpr>(E)) {
1651     return !PropRefE->isSuperReceiver();
1652   }
1653 
1654   const MemberExpr *ME = nullptr;
1655   if (isa<MemberExpr>(E))
1656     ME = cast<MemberExpr>(E);
1657   else if (const CallExpr *CE = dyn_cast<CallExpr>(E))
1658     ME = dyn_cast_or_null<MemberExpr>(CE->getCallee());
1659 
1660   if (ME) {
1661     if (const CXXMethodDecl *MD =
1662             dyn_cast_or_null<CXXMethodDecl>(ME->getMemberDecl()))
1663       return MD->isVirtual() &&
1664              ME->performsVirtualDispatch(
1665                  cxcursor::getCursorContext(C).getLangOpts());
1666   }
1667 
1668   return 0;
1669 }
1670 
1671 CXType clang_Cursor_getReceiverType(CXCursor C) {
1672   CXTranslationUnit TU = cxcursor::getCursorTU(C);
1673   const Expr *E = nullptr;
1674   if (clang_isExpression(C.kind))
1675     E = getCursorExpr(C);
1676 
1677   if (const ObjCMessageExpr *MsgE = dyn_cast_or_null<ObjCMessageExpr>(E))
1678     return cxtype::MakeCXType(MsgE->getReceiverType(), TU);
1679 
1680   if (auto *PropRefE = dyn_cast<ObjCPropertyRefExpr>(E)) {
1681     return cxtype::MakeCXType(
1682         PropRefE->getReceiverType(cxcursor::getCursorContext(C)), TU);
1683   }
1684 
1685   const MemberExpr *ME = nullptr;
1686   if (isa<MemberExpr>(E))
1687     ME = cast<MemberExpr>(E);
1688   else if (const CallExpr *CE = dyn_cast<CallExpr>(E))
1689     ME = dyn_cast_or_null<MemberExpr>(CE->getCallee());
1690 
1691   if (ME) {
1692     if (dyn_cast_or_null<CXXMethodDecl>(ME->getMemberDecl())) {
1693       auto receiverTy = ME->getBase()->IgnoreImpCasts()->getType();
1694       return cxtype::MakeCXType(receiverTy, TU);
1695     }
1696   }
1697 
1698   return cxtype::MakeCXType(QualType(), TU);
1699 }
1700