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::OMPCanonicalLoopClass:
643     K = CXCursor_OMPCanonicalLoop;
644     break;
645   case Stmt::OMPParallelDirectiveClass:
646     K = CXCursor_OMPParallelDirective;
647     break;
648   case Stmt::OMPSimdDirectiveClass:
649     K = CXCursor_OMPSimdDirective;
650     break;
651   case Stmt::OMPTileDirectiveClass:
652     K = CXCursor_OMPTileDirective;
653     break;
654   case Stmt::OMPForDirectiveClass:
655     K = CXCursor_OMPForDirective;
656     break;
657   case Stmt::OMPForSimdDirectiveClass:
658     K = CXCursor_OMPForSimdDirective;
659     break;
660   case Stmt::OMPSectionsDirectiveClass:
661     K = CXCursor_OMPSectionsDirective;
662     break;
663   case Stmt::OMPSectionDirectiveClass:
664     K = CXCursor_OMPSectionDirective;
665     break;
666   case Stmt::OMPSingleDirectiveClass:
667     K = CXCursor_OMPSingleDirective;
668     break;
669   case Stmt::OMPMasterDirectiveClass:
670     K = CXCursor_OMPMasterDirective;
671     break;
672   case Stmt::OMPCriticalDirectiveClass:
673     K = CXCursor_OMPCriticalDirective;
674     break;
675   case Stmt::OMPParallelForDirectiveClass:
676     K = CXCursor_OMPParallelForDirective;
677     break;
678   case Stmt::OMPParallelForSimdDirectiveClass:
679     K = CXCursor_OMPParallelForSimdDirective;
680     break;
681   case Stmt::OMPParallelMasterDirectiveClass:
682     K = CXCursor_OMPParallelMasterDirective;
683     break;
684   case Stmt::OMPParallelSectionsDirectiveClass:
685     K = CXCursor_OMPParallelSectionsDirective;
686     break;
687   case Stmt::OMPTaskDirectiveClass:
688     K = CXCursor_OMPTaskDirective;
689     break;
690   case Stmt::OMPTaskyieldDirectiveClass:
691     K = CXCursor_OMPTaskyieldDirective;
692     break;
693   case Stmt::OMPBarrierDirectiveClass:
694     K = CXCursor_OMPBarrierDirective;
695     break;
696   case Stmt::OMPTaskwaitDirectiveClass:
697     K = CXCursor_OMPTaskwaitDirective;
698     break;
699   case Stmt::OMPTaskgroupDirectiveClass:
700     K = CXCursor_OMPTaskgroupDirective;
701     break;
702   case Stmt::OMPFlushDirectiveClass:
703     K = CXCursor_OMPFlushDirective;
704     break;
705   case Stmt::OMPDepobjDirectiveClass:
706     K = CXCursor_OMPDepobjDirective;
707     break;
708   case Stmt::OMPScanDirectiveClass:
709     K = CXCursor_OMPScanDirective;
710     break;
711   case Stmt::OMPOrderedDirectiveClass:
712     K = CXCursor_OMPOrderedDirective;
713     break;
714   case Stmt::OMPAtomicDirectiveClass:
715     K = CXCursor_OMPAtomicDirective;
716     break;
717   case Stmt::OMPTargetDirectiveClass:
718     K = CXCursor_OMPTargetDirective;
719     break;
720   case Stmt::OMPTargetDataDirectiveClass:
721     K = CXCursor_OMPTargetDataDirective;
722     break;
723   case Stmt::OMPTargetEnterDataDirectiveClass:
724     K = CXCursor_OMPTargetEnterDataDirective;
725     break;
726   case Stmt::OMPTargetExitDataDirectiveClass:
727     K = CXCursor_OMPTargetExitDataDirective;
728     break;
729   case Stmt::OMPTargetParallelDirectiveClass:
730     K = CXCursor_OMPTargetParallelDirective;
731     break;
732   case Stmt::OMPTargetParallelForDirectiveClass:
733     K = CXCursor_OMPTargetParallelForDirective;
734     break;
735   case Stmt::OMPTargetUpdateDirectiveClass:
736     K = CXCursor_OMPTargetUpdateDirective;
737     break;
738   case Stmt::OMPTeamsDirectiveClass:
739     K = CXCursor_OMPTeamsDirective;
740     break;
741   case Stmt::OMPCancellationPointDirectiveClass:
742     K = CXCursor_OMPCancellationPointDirective;
743     break;
744   case Stmt::OMPCancelDirectiveClass:
745     K = CXCursor_OMPCancelDirective;
746     break;
747   case Stmt::OMPTaskLoopDirectiveClass:
748     K = CXCursor_OMPTaskLoopDirective;
749     break;
750   case Stmt::OMPTaskLoopSimdDirectiveClass:
751     K = CXCursor_OMPTaskLoopSimdDirective;
752     break;
753   case Stmt::OMPMasterTaskLoopDirectiveClass:
754     K = CXCursor_OMPMasterTaskLoopDirective;
755     break;
756   case Stmt::OMPMasterTaskLoopSimdDirectiveClass:
757     K = CXCursor_OMPMasterTaskLoopSimdDirective;
758     break;
759   case Stmt::OMPParallelMasterTaskLoopDirectiveClass:
760     K = CXCursor_OMPParallelMasterTaskLoopDirective;
761     break;
762   case Stmt::OMPParallelMasterTaskLoopSimdDirectiveClass:
763     K = CXCursor_OMPParallelMasterTaskLoopSimdDirective;
764     break;
765   case Stmt::OMPDistributeDirectiveClass:
766     K = CXCursor_OMPDistributeDirective;
767     break;
768   case Stmt::OMPDistributeParallelForDirectiveClass:
769     K = CXCursor_OMPDistributeParallelForDirective;
770     break;
771   case Stmt::OMPDistributeParallelForSimdDirectiveClass:
772     K = CXCursor_OMPDistributeParallelForSimdDirective;
773     break;
774   case Stmt::OMPDistributeSimdDirectiveClass:
775     K = CXCursor_OMPDistributeSimdDirective;
776     break;
777   case Stmt::OMPTargetParallelForSimdDirectiveClass:
778     K = CXCursor_OMPTargetParallelForSimdDirective;
779     break;
780   case Stmt::OMPTargetSimdDirectiveClass:
781     K = CXCursor_OMPTargetSimdDirective;
782     break;
783   case Stmt::OMPTeamsDistributeDirectiveClass:
784     K = CXCursor_OMPTeamsDistributeDirective;
785     break;
786   case Stmt::OMPTeamsDistributeSimdDirectiveClass:
787     K = CXCursor_OMPTeamsDistributeSimdDirective;
788     break;
789   case Stmt::OMPTeamsDistributeParallelForSimdDirectiveClass:
790     K = CXCursor_OMPTeamsDistributeParallelForSimdDirective;
791     break;
792   case Stmt::OMPTeamsDistributeParallelForDirectiveClass:
793     K = CXCursor_OMPTeamsDistributeParallelForDirective;
794     break;
795   case Stmt::OMPTargetTeamsDirectiveClass:
796     K = CXCursor_OMPTargetTeamsDirective;
797     break;
798   case Stmt::OMPTargetTeamsDistributeDirectiveClass:
799     K = CXCursor_OMPTargetTeamsDistributeDirective;
800     break;
801   case Stmt::OMPTargetTeamsDistributeParallelForDirectiveClass:
802     K = CXCursor_OMPTargetTeamsDistributeParallelForDirective;
803     break;
804   case Stmt::OMPTargetTeamsDistributeParallelForSimdDirectiveClass:
805     K = CXCursor_OMPTargetTeamsDistributeParallelForSimdDirective;
806     break;
807   case Stmt::OMPTargetTeamsDistributeSimdDirectiveClass:
808     K = CXCursor_OMPTargetTeamsDistributeSimdDirective;
809     break;
810   case Stmt::BuiltinBitCastExprClass:
811     K = CXCursor_BuiltinBitCastExpr;
812   }
813 
814   CXCursor C = {K, 0, {Parent, S, TU}};
815   return C;
816 }
817 
818 CXCursor cxcursor::MakeCursorObjCSuperClassRef(ObjCInterfaceDecl *Super,
819                                                SourceLocation Loc,
820                                                CXTranslationUnit TU) {
821   assert(Super && TU && "Invalid arguments!");
822   void *RawLoc = Loc.getPtrEncoding();
823   CXCursor C = {CXCursor_ObjCSuperClassRef, 0, {Super, RawLoc, TU}};
824   return C;
825 }
826 
827 std::pair<const ObjCInterfaceDecl *, SourceLocation>
828 cxcursor::getCursorObjCSuperClassRef(CXCursor C) {
829   assert(C.kind == CXCursor_ObjCSuperClassRef);
830   return std::make_pair(static_cast<const ObjCInterfaceDecl *>(C.data[0]),
831                         SourceLocation::getFromPtrEncoding(C.data[1]));
832 }
833 
834 CXCursor cxcursor::MakeCursorObjCProtocolRef(const ObjCProtocolDecl *Proto,
835                                              SourceLocation Loc,
836                                              CXTranslationUnit TU) {
837   assert(Proto && TU && "Invalid arguments!");
838   void *RawLoc = Loc.getPtrEncoding();
839   CXCursor C = {CXCursor_ObjCProtocolRef, 0, {Proto, RawLoc, TU}};
840   return C;
841 }
842 
843 std::pair<const ObjCProtocolDecl *, SourceLocation>
844 cxcursor::getCursorObjCProtocolRef(CXCursor C) {
845   assert(C.kind == CXCursor_ObjCProtocolRef);
846   return std::make_pair(static_cast<const ObjCProtocolDecl *>(C.data[0]),
847                         SourceLocation::getFromPtrEncoding(C.data[1]));
848 }
849 
850 CXCursor cxcursor::MakeCursorObjCClassRef(const ObjCInterfaceDecl *Class,
851                                           SourceLocation Loc,
852                                           CXTranslationUnit TU) {
853   // 'Class' can be null for invalid code.
854   if (!Class)
855     return MakeCXCursorInvalid(CXCursor_InvalidCode);
856   assert(TU && "Invalid arguments!");
857   void *RawLoc = Loc.getPtrEncoding();
858   CXCursor C = {CXCursor_ObjCClassRef, 0, {Class, RawLoc, TU}};
859   return C;
860 }
861 
862 std::pair<const ObjCInterfaceDecl *, SourceLocation>
863 cxcursor::getCursorObjCClassRef(CXCursor C) {
864   assert(C.kind == CXCursor_ObjCClassRef);
865   return std::make_pair(static_cast<const ObjCInterfaceDecl *>(C.data[0]),
866                         SourceLocation::getFromPtrEncoding(C.data[1]));
867 }
868 
869 CXCursor cxcursor::MakeCursorTypeRef(const TypeDecl *Type, SourceLocation Loc,
870                                      CXTranslationUnit TU) {
871   assert(Type && TU && "Invalid arguments!");
872   void *RawLoc = Loc.getPtrEncoding();
873   CXCursor C = {CXCursor_TypeRef, 0, {Type, RawLoc, TU}};
874   return C;
875 }
876 
877 std::pair<const TypeDecl *, SourceLocation>
878 cxcursor::getCursorTypeRef(CXCursor C) {
879   assert(C.kind == CXCursor_TypeRef);
880   return std::make_pair(static_cast<const TypeDecl *>(C.data[0]),
881                         SourceLocation::getFromPtrEncoding(C.data[1]));
882 }
883 
884 CXCursor cxcursor::MakeCursorTemplateRef(const TemplateDecl *Template,
885                                          SourceLocation Loc,
886                                          CXTranslationUnit TU) {
887   assert(Template && TU && "Invalid arguments!");
888   void *RawLoc = Loc.getPtrEncoding();
889   CXCursor C = {CXCursor_TemplateRef, 0, {Template, RawLoc, TU}};
890   return C;
891 }
892 
893 std::pair<const TemplateDecl *, SourceLocation>
894 cxcursor::getCursorTemplateRef(CXCursor C) {
895   assert(C.kind == CXCursor_TemplateRef);
896   return std::make_pair(static_cast<const TemplateDecl *>(C.data[0]),
897                         SourceLocation::getFromPtrEncoding(C.data[1]));
898 }
899 
900 CXCursor cxcursor::MakeCursorNamespaceRef(const NamedDecl *NS,
901                                           SourceLocation Loc,
902                                           CXTranslationUnit TU) {
903 
904   assert(NS && (isa<NamespaceDecl>(NS) || isa<NamespaceAliasDecl>(NS)) && TU &&
905          "Invalid arguments!");
906   void *RawLoc = Loc.getPtrEncoding();
907   CXCursor C = {CXCursor_NamespaceRef, 0, {NS, RawLoc, TU}};
908   return C;
909 }
910 
911 std::pair<const NamedDecl *, SourceLocation>
912 cxcursor::getCursorNamespaceRef(CXCursor C) {
913   assert(C.kind == CXCursor_NamespaceRef);
914   return std::make_pair(static_cast<const NamedDecl *>(C.data[0]),
915                         SourceLocation::getFromPtrEncoding(C.data[1]));
916 }
917 
918 CXCursor cxcursor::MakeCursorVariableRef(const VarDecl *Var, SourceLocation Loc,
919                                          CXTranslationUnit TU) {
920 
921   assert(Var && TU && "Invalid arguments!");
922   void *RawLoc = Loc.getPtrEncoding();
923   CXCursor C = {CXCursor_VariableRef, 0, {Var, RawLoc, TU}};
924   return C;
925 }
926 
927 std::pair<const VarDecl *, SourceLocation>
928 cxcursor::getCursorVariableRef(CXCursor C) {
929   assert(C.kind == CXCursor_VariableRef);
930   return std::make_pair(static_cast<const VarDecl *>(C.data[0]),
931                         SourceLocation::getFromPtrEncoding(C.data[1]));
932 }
933 
934 CXCursor cxcursor::MakeCursorMemberRef(const FieldDecl *Field,
935                                        SourceLocation Loc,
936                                        CXTranslationUnit TU) {
937 
938   assert(Field && TU && "Invalid arguments!");
939   void *RawLoc = Loc.getPtrEncoding();
940   CXCursor C = {CXCursor_MemberRef, 0, {Field, RawLoc, TU}};
941   return C;
942 }
943 
944 std::pair<const FieldDecl *, SourceLocation>
945 cxcursor::getCursorMemberRef(CXCursor C) {
946   assert(C.kind == CXCursor_MemberRef);
947   return std::make_pair(static_cast<const FieldDecl *>(C.data[0]),
948                         SourceLocation::getFromPtrEncoding(C.data[1]));
949 }
950 
951 CXCursor cxcursor::MakeCursorCXXBaseSpecifier(const CXXBaseSpecifier *B,
952                                               CXTranslationUnit TU) {
953   CXCursor C = {CXCursor_CXXBaseSpecifier, 0, {B, nullptr, TU}};
954   return C;
955 }
956 
957 const CXXBaseSpecifier *cxcursor::getCursorCXXBaseSpecifier(CXCursor C) {
958   assert(C.kind == CXCursor_CXXBaseSpecifier);
959   return static_cast<const CXXBaseSpecifier *>(C.data[0]);
960 }
961 
962 CXCursor cxcursor::MakePreprocessingDirectiveCursor(SourceRange Range,
963                                                     CXTranslationUnit TU) {
964   CXCursor C = {
965       CXCursor_PreprocessingDirective,
966       0,
967       {Range.getBegin().getPtrEncoding(), Range.getEnd().getPtrEncoding(), TU}};
968   return C;
969 }
970 
971 SourceRange cxcursor::getCursorPreprocessingDirective(CXCursor C) {
972   assert(C.kind == CXCursor_PreprocessingDirective);
973   SourceRange Range(SourceLocation::getFromPtrEncoding(C.data[0]),
974                     SourceLocation::getFromPtrEncoding(C.data[1]));
975   ASTUnit *TU = getCursorASTUnit(C);
976   return TU->mapRangeFromPreamble(Range);
977 }
978 
979 CXCursor cxcursor::MakeMacroDefinitionCursor(const MacroDefinitionRecord *MI,
980                                              CXTranslationUnit TU) {
981   CXCursor C = {CXCursor_MacroDefinition, 0, {MI, nullptr, TU}};
982   return C;
983 }
984 
985 const MacroDefinitionRecord *cxcursor::getCursorMacroDefinition(CXCursor C) {
986   assert(C.kind == CXCursor_MacroDefinition);
987   return static_cast<const MacroDefinitionRecord *>(C.data[0]);
988 }
989 
990 CXCursor cxcursor::MakeMacroExpansionCursor(MacroExpansion *MI,
991                                             CXTranslationUnit TU) {
992   CXCursor C = {CXCursor_MacroExpansion, 0, {MI, nullptr, TU}};
993   return C;
994 }
995 
996 CXCursor cxcursor::MakeMacroExpansionCursor(MacroDefinitionRecord *MI,
997                                             SourceLocation Loc,
998                                             CXTranslationUnit TU) {
999   assert(Loc.isValid());
1000   CXCursor C = {CXCursor_MacroExpansion, 0, {MI, Loc.getPtrEncoding(), TU}};
1001   return C;
1002 }
1003 
1004 const IdentifierInfo *cxcursor::MacroExpansionCursor::getName() const {
1005   if (isPseudo())
1006     return getAsMacroDefinition()->getName();
1007   return getAsMacroExpansion()->getName();
1008 }
1009 const MacroDefinitionRecord *
1010 cxcursor::MacroExpansionCursor::getDefinition() const {
1011   if (isPseudo())
1012     return getAsMacroDefinition();
1013   return getAsMacroExpansion()->getDefinition();
1014 }
1015 SourceRange cxcursor::MacroExpansionCursor::getSourceRange() const {
1016   if (isPseudo())
1017     return getPseudoLoc();
1018   return getAsMacroExpansion()->getSourceRange();
1019 }
1020 
1021 CXCursor cxcursor::MakeInclusionDirectiveCursor(InclusionDirective *ID,
1022                                                 CXTranslationUnit TU) {
1023   CXCursor C = {CXCursor_InclusionDirective, 0, {ID, nullptr, TU}};
1024   return C;
1025 }
1026 
1027 const InclusionDirective *cxcursor::getCursorInclusionDirective(CXCursor C) {
1028   assert(C.kind == CXCursor_InclusionDirective);
1029   return static_cast<const InclusionDirective *>(C.data[0]);
1030 }
1031 
1032 CXCursor cxcursor::MakeCursorLabelRef(LabelStmt *Label, SourceLocation Loc,
1033                                       CXTranslationUnit TU) {
1034 
1035   assert(Label && TU && "Invalid arguments!");
1036   void *RawLoc = Loc.getPtrEncoding();
1037   CXCursor C = {CXCursor_LabelRef, 0, {Label, RawLoc, TU}};
1038   return C;
1039 }
1040 
1041 std::pair<const LabelStmt *, SourceLocation>
1042 cxcursor::getCursorLabelRef(CXCursor C) {
1043   assert(C.kind == CXCursor_LabelRef);
1044   return std::make_pair(static_cast<const LabelStmt *>(C.data[0]),
1045                         SourceLocation::getFromPtrEncoding(C.data[1]));
1046 }
1047 
1048 CXCursor cxcursor::MakeCursorOverloadedDeclRef(const OverloadExpr *E,
1049                                                CXTranslationUnit TU) {
1050   assert(E && TU && "Invalid arguments!");
1051   OverloadedDeclRefStorage Storage(E);
1052   void *RawLoc = E->getNameLoc().getPtrEncoding();
1053   CXCursor C = {
1054       CXCursor_OverloadedDeclRef, 0, {Storage.getOpaqueValue(), RawLoc, TU}};
1055   return C;
1056 }
1057 
1058 CXCursor cxcursor::MakeCursorOverloadedDeclRef(const Decl *D,
1059                                                SourceLocation Loc,
1060                                                CXTranslationUnit TU) {
1061   assert(D && TU && "Invalid arguments!");
1062   void *RawLoc = Loc.getPtrEncoding();
1063   OverloadedDeclRefStorage Storage(D);
1064   CXCursor C = {
1065       CXCursor_OverloadedDeclRef, 0, {Storage.getOpaqueValue(), RawLoc, TU}};
1066   return C;
1067 }
1068 
1069 CXCursor cxcursor::MakeCursorOverloadedDeclRef(TemplateName Name,
1070                                                SourceLocation Loc,
1071                                                CXTranslationUnit TU) {
1072   assert(Name.getAsOverloadedTemplate() && TU && "Invalid arguments!");
1073   void *RawLoc = Loc.getPtrEncoding();
1074   OverloadedDeclRefStorage Storage(Name.getAsOverloadedTemplate());
1075   CXCursor C = {
1076       CXCursor_OverloadedDeclRef, 0, {Storage.getOpaqueValue(), RawLoc, TU}};
1077   return C;
1078 }
1079 
1080 std::pair<cxcursor::OverloadedDeclRefStorage, SourceLocation>
1081 cxcursor::getCursorOverloadedDeclRef(CXCursor C) {
1082   assert(C.kind == CXCursor_OverloadedDeclRef);
1083   return std::make_pair(OverloadedDeclRefStorage::getFromOpaqueValue(
1084                             const_cast<void *>(C.data[0])),
1085                         SourceLocation::getFromPtrEncoding(C.data[1]));
1086 }
1087 
1088 const Decl *cxcursor::getCursorDecl(CXCursor Cursor) {
1089   return static_cast<const Decl *>(Cursor.data[0]);
1090 }
1091 
1092 const Expr *cxcursor::getCursorExpr(CXCursor Cursor) {
1093   return dyn_cast_or_null<Expr>(getCursorStmt(Cursor));
1094 }
1095 
1096 const Stmt *cxcursor::getCursorStmt(CXCursor Cursor) {
1097   if (Cursor.kind == CXCursor_ObjCSuperClassRef ||
1098       Cursor.kind == CXCursor_ObjCProtocolRef ||
1099       Cursor.kind == CXCursor_ObjCClassRef)
1100     return nullptr;
1101 
1102   return static_cast<const Stmt *>(Cursor.data[1]);
1103 }
1104 
1105 const Attr *cxcursor::getCursorAttr(CXCursor Cursor) {
1106   return static_cast<const Attr *>(Cursor.data[1]);
1107 }
1108 
1109 ASTContext &cxcursor::getCursorContext(CXCursor Cursor) {
1110   return getCursorASTUnit(Cursor)->getASTContext();
1111 }
1112 
1113 ASTUnit *cxcursor::getCursorASTUnit(CXCursor Cursor) {
1114   CXTranslationUnit TU = getCursorTU(Cursor);
1115   if (!TU)
1116     return nullptr;
1117   return cxtu::getASTUnit(TU);
1118 }
1119 
1120 CXTranslationUnit cxcursor::getCursorTU(CXCursor Cursor) {
1121   return static_cast<CXTranslationUnit>(const_cast<void *>(Cursor.data[2]));
1122 }
1123 
1124 void cxcursor::getOverriddenCursors(CXCursor cursor,
1125                                     SmallVectorImpl<CXCursor> &overridden) {
1126   assert(clang_isDeclaration(cursor.kind));
1127   const NamedDecl *D = dyn_cast_or_null<NamedDecl>(getCursorDecl(cursor));
1128   if (!D)
1129     return;
1130 
1131   CXTranslationUnit TU = getCursorTU(cursor);
1132   SmallVector<const NamedDecl *, 8> OverDecls;
1133   D->getASTContext().getOverriddenMethods(D, OverDecls);
1134 
1135   for (SmallVectorImpl<const NamedDecl *>::iterator I = OverDecls.begin(),
1136                                                     E = OverDecls.end();
1137        I != E; ++I) {
1138     overridden.push_back(MakeCXCursor(*I, TU));
1139   }
1140 }
1141 
1142 std::pair<int, SourceLocation>
1143 cxcursor::getSelectorIdentifierIndexAndLoc(CXCursor cursor) {
1144   if (cursor.kind == CXCursor_ObjCMessageExpr) {
1145     if (cursor.xdata != -1)
1146       return std::make_pair(cursor.xdata,
1147                             cast<ObjCMessageExpr>(getCursorExpr(cursor))
1148                                 ->getSelectorLoc(cursor.xdata));
1149   } else if (cursor.kind == CXCursor_ObjCClassMethodDecl ||
1150              cursor.kind == CXCursor_ObjCInstanceMethodDecl) {
1151     if (cursor.xdata != -1)
1152       return std::make_pair(cursor.xdata,
1153                             cast<ObjCMethodDecl>(getCursorDecl(cursor))
1154                                 ->getSelectorLoc(cursor.xdata));
1155   }
1156 
1157   return std::make_pair(-1, SourceLocation());
1158 }
1159 
1160 CXCursor cxcursor::getSelectorIdentifierCursor(int SelIdx, CXCursor cursor) {
1161   CXCursor newCursor = cursor;
1162 
1163   if (cursor.kind == CXCursor_ObjCMessageExpr) {
1164     if (SelIdx == -1 ||
1165         unsigned(SelIdx) >=
1166             cast<ObjCMessageExpr>(getCursorExpr(cursor))->getNumSelectorLocs())
1167       newCursor.xdata = -1;
1168     else
1169       newCursor.xdata = SelIdx;
1170   } else if (cursor.kind == CXCursor_ObjCClassMethodDecl ||
1171              cursor.kind == CXCursor_ObjCInstanceMethodDecl) {
1172     if (SelIdx == -1 ||
1173         unsigned(SelIdx) >=
1174             cast<ObjCMethodDecl>(getCursorDecl(cursor))->getNumSelectorLocs())
1175       newCursor.xdata = -1;
1176     else
1177       newCursor.xdata = SelIdx;
1178   }
1179 
1180   return newCursor;
1181 }
1182 
1183 CXCursor cxcursor::getTypeRefCursor(CXCursor cursor) {
1184   if (cursor.kind != CXCursor_CallExpr)
1185     return cursor;
1186 
1187   if (cursor.xdata == 0)
1188     return cursor;
1189 
1190   const Expr *E = getCursorExpr(cursor);
1191   TypeSourceInfo *Type = nullptr;
1192   if (const CXXUnresolvedConstructExpr *UnCtor =
1193           dyn_cast<CXXUnresolvedConstructExpr>(E)) {
1194     Type = UnCtor->getTypeSourceInfo();
1195   } else if (const CXXTemporaryObjectExpr *Tmp =
1196                  dyn_cast<CXXTemporaryObjectExpr>(E)) {
1197     Type = Tmp->getTypeSourceInfo();
1198   }
1199 
1200   if (!Type)
1201     return cursor;
1202 
1203   CXTranslationUnit TU = getCursorTU(cursor);
1204   QualType Ty = Type->getType();
1205   TypeLoc TL = Type->getTypeLoc();
1206   SourceLocation Loc = TL.getBeginLoc();
1207 
1208   if (const ElaboratedType *ElabT = Ty->getAs<ElaboratedType>()) {
1209     Ty = ElabT->getNamedType();
1210     ElaboratedTypeLoc ElabTL = TL.castAs<ElaboratedTypeLoc>();
1211     Loc = ElabTL.getNamedTypeLoc().getBeginLoc();
1212   }
1213 
1214   if (const TypedefType *Typedef = Ty->getAs<TypedefType>())
1215     return MakeCursorTypeRef(Typedef->getDecl(), Loc, TU);
1216   if (const TagType *Tag = Ty->getAs<TagType>())
1217     return MakeCursorTypeRef(Tag->getDecl(), Loc, TU);
1218   if (const TemplateTypeParmType *TemplP = Ty->getAs<TemplateTypeParmType>())
1219     return MakeCursorTypeRef(TemplP->getDecl(), Loc, TU);
1220 
1221   return cursor;
1222 }
1223 
1224 bool cxcursor::operator==(CXCursor X, CXCursor Y) {
1225   return X.kind == Y.kind && X.data[0] == Y.data[0] && X.data[1] == Y.data[1] &&
1226          X.data[2] == Y.data[2];
1227 }
1228 
1229 // FIXME: Remove once we can model DeclGroups and their appropriate ranges
1230 // properly in the ASTs.
1231 bool cxcursor::isFirstInDeclGroup(CXCursor C) {
1232   assert(clang_isDeclaration(C.kind));
1233   return ((uintptr_t)(C.data[1])) != 0;
1234 }
1235 
1236 //===----------------------------------------------------------------------===//
1237 // libclang CXCursor APIs
1238 //===----------------------------------------------------------------------===//
1239 
1240 int clang_Cursor_isNull(CXCursor cursor) {
1241   return clang_equalCursors(cursor, clang_getNullCursor());
1242 }
1243 
1244 CXTranslationUnit clang_Cursor_getTranslationUnit(CXCursor cursor) {
1245   return getCursorTU(cursor);
1246 }
1247 
1248 int clang_Cursor_getNumArguments(CXCursor C) {
1249   if (clang_isDeclaration(C.kind)) {
1250     const Decl *D = cxcursor::getCursorDecl(C);
1251     if (const ObjCMethodDecl *MD = dyn_cast_or_null<ObjCMethodDecl>(D))
1252       return MD->param_size();
1253     if (const FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(D))
1254       return FD->param_size();
1255   }
1256 
1257   if (clang_isExpression(C.kind)) {
1258     const Expr *E = cxcursor::getCursorExpr(C);
1259     if (const CallExpr *CE = dyn_cast<CallExpr>(E)) {
1260       return CE->getNumArgs();
1261     }
1262     if (const CXXConstructExpr *CE = dyn_cast<CXXConstructExpr>(E)) {
1263       return CE->getNumArgs();
1264     }
1265   }
1266 
1267   return -1;
1268 }
1269 
1270 CXCursor clang_Cursor_getArgument(CXCursor C, unsigned i) {
1271   if (clang_isDeclaration(C.kind)) {
1272     const Decl *D = cxcursor::getCursorDecl(C);
1273     if (const ObjCMethodDecl *MD = dyn_cast_or_null<ObjCMethodDecl>(D)) {
1274       if (i < MD->param_size())
1275         return cxcursor::MakeCXCursor(MD->parameters()[i],
1276                                       cxcursor::getCursorTU(C));
1277     } else if (const FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(D)) {
1278       if (i < FD->param_size())
1279         return cxcursor::MakeCXCursor(FD->parameters()[i],
1280                                       cxcursor::getCursorTU(C));
1281     }
1282   }
1283 
1284   if (clang_isExpression(C.kind)) {
1285     const Expr *E = cxcursor::getCursorExpr(C);
1286     if (const CallExpr *CE = dyn_cast<CallExpr>(E)) {
1287       if (i < CE->getNumArgs()) {
1288         return cxcursor::MakeCXCursor(CE->getArg(i), getCursorDecl(C),
1289                                       cxcursor::getCursorTU(C));
1290       }
1291     }
1292     if (const CXXConstructExpr *CE = dyn_cast<CXXConstructExpr>(E)) {
1293       if (i < CE->getNumArgs()) {
1294         return cxcursor::MakeCXCursor(CE->getArg(i), getCursorDecl(C),
1295                                       cxcursor::getCursorTU(C));
1296       }
1297     }
1298   }
1299 
1300   return clang_getNullCursor();
1301 }
1302 
1303 int clang_Cursor_getNumTemplateArguments(CXCursor C) {
1304   if (clang_getCursorKind(C) != CXCursor_FunctionDecl) {
1305     return -1;
1306   }
1307 
1308   const FunctionDecl *FD =
1309       llvm::dyn_cast_or_null<clang::FunctionDecl>(getCursorDecl(C));
1310   if (!FD) {
1311     return -1;
1312   }
1313 
1314   const FunctionTemplateSpecializationInfo *SpecInfo =
1315       FD->getTemplateSpecializationInfo();
1316   if (!SpecInfo) {
1317     return -1;
1318   }
1319 
1320   return SpecInfo->TemplateArguments->size();
1321 }
1322 
1323 enum CXGetTemplateArgumentStatus {
1324   /** The operation completed successfully */
1325   CXGetTemplateArgumentStatus_Success = 0,
1326 
1327   /** The specified cursor did not represent a FunctionDecl. */
1328   CXGetTemplateArgumentStatus_CursorNotFunctionDecl = -1,
1329 
1330   /** The specified cursor was not castable to a FunctionDecl. */
1331   CXGetTemplateArgumentStatus_BadFunctionDeclCast = -2,
1332 
1333   /** A NULL FunctionTemplateSpecializationInfo was retrieved. */
1334   CXGetTemplateArgumentStatus_NullTemplSpecInfo = -3,
1335 
1336   /** An invalid (OOB) argument index was specified */
1337   CXGetTemplateArgumentStatus_InvalidIndex = -4
1338 };
1339 
1340 static int clang_Cursor_getTemplateArgument(CXCursor C, unsigned I,
1341                                             TemplateArgument *TA) {
1342   if (clang_getCursorKind(C) != CXCursor_FunctionDecl) {
1343     return CXGetTemplateArgumentStatus_CursorNotFunctionDecl;
1344   }
1345 
1346   const FunctionDecl *FD =
1347       llvm::dyn_cast_or_null<clang::FunctionDecl>(getCursorDecl(C));
1348   if (!FD) {
1349     return CXGetTemplateArgumentStatus_BadFunctionDeclCast;
1350   }
1351 
1352   const FunctionTemplateSpecializationInfo *SpecInfo =
1353       FD->getTemplateSpecializationInfo();
1354   if (!SpecInfo) {
1355     return CXGetTemplateArgumentStatus_NullTemplSpecInfo;
1356   }
1357 
1358   if (I >= SpecInfo->TemplateArguments->size()) {
1359     return CXGetTemplateArgumentStatus_InvalidIndex;
1360   }
1361 
1362   *TA = SpecInfo->TemplateArguments->get(I);
1363   return 0;
1364 }
1365 
1366 enum CXTemplateArgumentKind clang_Cursor_getTemplateArgumentKind(CXCursor C,
1367                                                                  unsigned I) {
1368   TemplateArgument TA;
1369   if (clang_Cursor_getTemplateArgument(C, I, &TA)) {
1370     return CXTemplateArgumentKind_Invalid;
1371   }
1372 
1373   switch (TA.getKind()) {
1374   case TemplateArgument::Null:
1375     return CXTemplateArgumentKind_Null;
1376   case TemplateArgument::Type:
1377     return CXTemplateArgumentKind_Type;
1378   case TemplateArgument::Declaration:
1379     return CXTemplateArgumentKind_Declaration;
1380   case TemplateArgument::NullPtr:
1381     return CXTemplateArgumentKind_NullPtr;
1382   case TemplateArgument::Integral:
1383     return CXTemplateArgumentKind_Integral;
1384   case TemplateArgument::Template:
1385     return CXTemplateArgumentKind_Template;
1386   case TemplateArgument::TemplateExpansion:
1387     return CXTemplateArgumentKind_TemplateExpansion;
1388   case TemplateArgument::Expression:
1389     return CXTemplateArgumentKind_Expression;
1390   case TemplateArgument::Pack:
1391     return CXTemplateArgumentKind_Pack;
1392   }
1393 
1394   return CXTemplateArgumentKind_Invalid;
1395 }
1396 
1397 CXType clang_Cursor_getTemplateArgumentType(CXCursor C, unsigned I) {
1398   TemplateArgument TA;
1399   if (clang_Cursor_getTemplateArgument(C, I, &TA) !=
1400       CXGetTemplateArgumentStatus_Success) {
1401     return cxtype::MakeCXType(QualType(), getCursorTU(C));
1402   }
1403 
1404   if (TA.getKind() != TemplateArgument::Type) {
1405     return cxtype::MakeCXType(QualType(), getCursorTU(C));
1406   }
1407 
1408   return cxtype::MakeCXType(TA.getAsType(), getCursorTU(C));
1409 }
1410 
1411 long long clang_Cursor_getTemplateArgumentValue(CXCursor C, unsigned I) {
1412   TemplateArgument TA;
1413   if (clang_Cursor_getTemplateArgument(C, I, &TA) !=
1414       CXGetTemplateArgumentStatus_Success) {
1415     assert(0 && "Unable to retrieve TemplateArgument");
1416     return 0;
1417   }
1418 
1419   if (TA.getKind() != TemplateArgument::Integral) {
1420     assert(0 && "Passed template argument is not Integral");
1421     return 0;
1422   }
1423 
1424   return TA.getAsIntegral().getSExtValue();
1425 }
1426 
1427 unsigned long long clang_Cursor_getTemplateArgumentUnsignedValue(CXCursor C,
1428                                                                  unsigned I) {
1429   TemplateArgument TA;
1430   if (clang_Cursor_getTemplateArgument(C, I, &TA) !=
1431       CXGetTemplateArgumentStatus_Success) {
1432     assert(0 && "Unable to retrieve TemplateArgument");
1433     return 0;
1434   }
1435 
1436   if (TA.getKind() != TemplateArgument::Integral) {
1437     assert(0 && "Passed template argument is not Integral");
1438     return 0;
1439   }
1440 
1441   return TA.getAsIntegral().getZExtValue();
1442 }
1443 
1444 //===----------------------------------------------------------------------===//
1445 // CXCursorSet.
1446 //===----------------------------------------------------------------------===//
1447 
1448 typedef llvm::DenseMap<CXCursor, unsigned> CXCursorSet_Impl;
1449 
1450 static inline CXCursorSet packCXCursorSet(CXCursorSet_Impl *setImpl) {
1451   return (CXCursorSet)setImpl;
1452 }
1453 static inline CXCursorSet_Impl *unpackCXCursorSet(CXCursorSet set) {
1454   return (CXCursorSet_Impl *)set;
1455 }
1456 namespace llvm {
1457 template <> struct DenseMapInfo<CXCursor> {
1458 public:
1459   static inline CXCursor getEmptyKey() {
1460     return MakeCXCursorInvalid(CXCursor_InvalidFile);
1461   }
1462   static inline CXCursor getTombstoneKey() {
1463     return MakeCXCursorInvalid(CXCursor_NoDeclFound);
1464   }
1465   static inline unsigned getHashValue(const CXCursor &cursor) {
1466     return llvm::DenseMapInfo<std::pair<const void *, const void *>>::
1467         getHashValue(std::make_pair(cursor.data[0], cursor.data[1]));
1468   }
1469   static inline bool isEqual(const CXCursor &x, const CXCursor &y) {
1470     return x.kind == y.kind && x.data[0] == y.data[0] && x.data[1] == y.data[1];
1471   }
1472 };
1473 } // namespace llvm
1474 
1475 CXCursorSet clang_createCXCursorSet() {
1476   return packCXCursorSet(new CXCursorSet_Impl());
1477 }
1478 
1479 void clang_disposeCXCursorSet(CXCursorSet set) {
1480   delete unpackCXCursorSet(set);
1481 }
1482 
1483 unsigned clang_CXCursorSet_contains(CXCursorSet set, CXCursor cursor) {
1484   CXCursorSet_Impl *setImpl = unpackCXCursorSet(set);
1485   if (!setImpl)
1486     return 0;
1487   return setImpl->find(cursor) != setImpl->end();
1488 }
1489 
1490 unsigned clang_CXCursorSet_insert(CXCursorSet set, CXCursor cursor) {
1491   // Do not insert invalid cursors into the set.
1492   if (cursor.kind >= CXCursor_FirstInvalid &&
1493       cursor.kind <= CXCursor_LastInvalid)
1494     return 1;
1495 
1496   CXCursorSet_Impl *setImpl = unpackCXCursorSet(set);
1497   if (!setImpl)
1498     return 1;
1499   unsigned &entry = (*setImpl)[cursor];
1500   unsigned flag = entry == 0 ? 1 : 0;
1501   entry = 1;
1502   return flag;
1503 }
1504 
1505 CXCompletionString clang_getCursorCompletionString(CXCursor cursor) {
1506   enum CXCursorKind kind = clang_getCursorKind(cursor);
1507   if (clang_isDeclaration(kind)) {
1508     const Decl *decl = getCursorDecl(cursor);
1509     if (const NamedDecl *namedDecl = dyn_cast_or_null<NamedDecl>(decl)) {
1510       ASTUnit *unit = getCursorASTUnit(cursor);
1511       CodeCompletionResult Result(namedDecl, CCP_Declaration);
1512       CodeCompletionString *String = Result.CreateCodeCompletionString(
1513           unit->getASTContext(), unit->getPreprocessor(),
1514           CodeCompletionContext::CCC_Other,
1515           unit->getCodeCompletionTUInfo().getAllocator(),
1516           unit->getCodeCompletionTUInfo(), true);
1517       return String;
1518     }
1519   } else if (kind == CXCursor_MacroDefinition) {
1520     const MacroDefinitionRecord *definition = getCursorMacroDefinition(cursor);
1521     const IdentifierInfo *Macro = definition->getName();
1522     ASTUnit *unit = getCursorASTUnit(cursor);
1523     CodeCompletionResult Result(
1524         Macro,
1525         unit->getPreprocessor().getMacroDefinition(Macro).getMacroInfo());
1526     CodeCompletionString *String = Result.CreateCodeCompletionString(
1527         unit->getASTContext(), unit->getPreprocessor(),
1528         CodeCompletionContext::CCC_Other,
1529         unit->getCodeCompletionTUInfo().getAllocator(),
1530         unit->getCodeCompletionTUInfo(), false);
1531     return String;
1532   }
1533   return nullptr;
1534 }
1535 
1536 namespace {
1537 struct OverridenCursorsPool {
1538   typedef SmallVector<CXCursor, 2> CursorVec;
1539   std::vector<CursorVec *> AllCursors;
1540   std::vector<CursorVec *> AvailableCursors;
1541 
1542   ~OverridenCursorsPool() {
1543     for (std::vector<CursorVec *>::iterator I = AllCursors.begin(),
1544                                             E = AllCursors.end();
1545          I != E; ++I) {
1546       delete *I;
1547     }
1548   }
1549 };
1550 } // namespace
1551 
1552 void *cxcursor::createOverridenCXCursorsPool() {
1553   return new OverridenCursorsPool();
1554 }
1555 
1556 void cxcursor::disposeOverridenCXCursorsPool(void *pool) {
1557   delete static_cast<OverridenCursorsPool *>(pool);
1558 }
1559 
1560 void clang_getOverriddenCursors(CXCursor cursor, CXCursor **overridden,
1561                                 unsigned *num_overridden) {
1562   if (overridden)
1563     *overridden = nullptr;
1564   if (num_overridden)
1565     *num_overridden = 0;
1566 
1567   CXTranslationUnit TU = cxcursor::getCursorTU(cursor);
1568 
1569   if (!overridden || !num_overridden || !TU)
1570     return;
1571 
1572   if (!clang_isDeclaration(cursor.kind))
1573     return;
1574 
1575   OverridenCursorsPool &pool =
1576       *static_cast<OverridenCursorsPool *>(TU->OverridenCursorsPool);
1577 
1578   OverridenCursorsPool::CursorVec *Vec = nullptr;
1579 
1580   if (!pool.AvailableCursors.empty()) {
1581     Vec = pool.AvailableCursors.back();
1582     pool.AvailableCursors.pop_back();
1583   } else {
1584     Vec = new OverridenCursorsPool::CursorVec();
1585     pool.AllCursors.push_back(Vec);
1586   }
1587 
1588   // Clear out the vector, but don't free the memory contents.  This
1589   // reduces malloc() traffic.
1590   Vec->clear();
1591 
1592   // Use the first entry to contain a back reference to the vector.
1593   // This is a complete hack.
1594   CXCursor backRefCursor = MakeCXCursorInvalid(CXCursor_InvalidFile, TU);
1595   backRefCursor.data[0] = Vec;
1596   assert(cxcursor::getCursorTU(backRefCursor) == TU);
1597   Vec->push_back(backRefCursor);
1598 
1599   // Get the overridden cursors.
1600   cxcursor::getOverriddenCursors(cursor, *Vec);
1601 
1602   // Did we get any overridden cursors?  If not, return Vec to the pool
1603   // of available cursor vectors.
1604   if (Vec->size() == 1) {
1605     pool.AvailableCursors.push_back(Vec);
1606     return;
1607   }
1608 
1609   // Now tell the caller about the overridden cursors.
1610   assert(Vec->size() > 1);
1611   *overridden = &((*Vec)[1]);
1612   *num_overridden = Vec->size() - 1;
1613 }
1614 
1615 void clang_disposeOverriddenCursors(CXCursor *overridden) {
1616   if (!overridden)
1617     return;
1618 
1619   // Use pointer arithmetic to get back the first faux entry
1620   // which has a back-reference to the TU and the vector.
1621   --overridden;
1622   OverridenCursorsPool::CursorVec *Vec =
1623       static_cast<OverridenCursorsPool::CursorVec *>(
1624           const_cast<void *>(overridden->data[0]));
1625   CXTranslationUnit TU = getCursorTU(*overridden);
1626 
1627   assert(Vec && TU);
1628 
1629   OverridenCursorsPool &pool =
1630       *static_cast<OverridenCursorsPool *>(TU->OverridenCursorsPool);
1631 
1632   pool.AvailableCursors.push_back(Vec);
1633 }
1634 
1635 int clang_Cursor_isDynamicCall(CXCursor C) {
1636   const Expr *E = nullptr;
1637   if (clang_isExpression(C.kind))
1638     E = getCursorExpr(C);
1639   if (!E)
1640     return 0;
1641 
1642   if (const ObjCMessageExpr *MsgE = dyn_cast<ObjCMessageExpr>(E)) {
1643     if (MsgE->getReceiverKind() != ObjCMessageExpr::Instance)
1644       return false;
1645     if (auto *RecE = dyn_cast<ObjCMessageExpr>(
1646             MsgE->getInstanceReceiver()->IgnoreParenCasts())) {
1647       if (RecE->getMethodFamily() == OMF_alloc)
1648         return false;
1649     }
1650     return true;
1651   }
1652 
1653   if (auto *PropRefE = dyn_cast<ObjCPropertyRefExpr>(E)) {
1654     return !PropRefE->isSuperReceiver();
1655   }
1656 
1657   const MemberExpr *ME = nullptr;
1658   if (isa<MemberExpr>(E))
1659     ME = cast<MemberExpr>(E);
1660   else if (const CallExpr *CE = dyn_cast<CallExpr>(E))
1661     ME = dyn_cast_or_null<MemberExpr>(CE->getCallee());
1662 
1663   if (ME) {
1664     if (const CXXMethodDecl *MD =
1665             dyn_cast_or_null<CXXMethodDecl>(ME->getMemberDecl()))
1666       return MD->isVirtual() &&
1667              ME->performsVirtualDispatch(
1668                  cxcursor::getCursorContext(C).getLangOpts());
1669   }
1670 
1671   return 0;
1672 }
1673 
1674 CXType clang_Cursor_getReceiverType(CXCursor C) {
1675   CXTranslationUnit TU = cxcursor::getCursorTU(C);
1676   const Expr *E = nullptr;
1677   if (clang_isExpression(C.kind))
1678     E = getCursorExpr(C);
1679 
1680   if (const ObjCMessageExpr *MsgE = dyn_cast_or_null<ObjCMessageExpr>(E))
1681     return cxtype::MakeCXType(MsgE->getReceiverType(), TU);
1682 
1683   if (auto *PropRefE = dyn_cast<ObjCPropertyRefExpr>(E)) {
1684     return cxtype::MakeCXType(
1685         PropRefE->getReceiverType(cxcursor::getCursorContext(C)), TU);
1686   }
1687 
1688   const MemberExpr *ME = nullptr;
1689   if (isa<MemberExpr>(E))
1690     ME = cast<MemberExpr>(E);
1691   else if (const CallExpr *CE = dyn_cast<CallExpr>(E))
1692     ME = dyn_cast_or_null<MemberExpr>(CE->getCallee());
1693 
1694   if (ME) {
1695     if (dyn_cast_or_null<CXXMethodDecl>(ME->getMemberDecl())) {
1696       auto receiverTy = ME->getBase()->IgnoreImpCasts()->getType();
1697       return cxtype::MakeCXType(receiverTy, TU);
1698     }
1699   }
1700 
1701   return cxtype::MakeCXType(QualType(), TU);
1702 }
1703