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