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   case Stmt::SYCLUniqueStableNameExprClass:
340     K = CXCursor_UnexposedExpr;
341     break;
342 
343   case Stmt::OpaqueValueExprClass:
344     if (Expr *Src = cast<OpaqueValueExpr>(S)->getSourceExpr())
345       return MakeCXCursor(Src, Parent, TU, RegionOfInterest);
346     K = CXCursor_UnexposedExpr;
347     break;
348 
349   case Stmt::PseudoObjectExprClass:
350     return MakeCXCursor(cast<PseudoObjectExpr>(S)->getSyntacticForm(), Parent,
351                         TU, RegionOfInterest);
352 
353   case Stmt::CompoundStmtClass:
354     K = CXCursor_CompoundStmt;
355     break;
356 
357   case Stmt::NullStmtClass:
358     K = CXCursor_NullStmt;
359     break;
360 
361   case Stmt::LabelStmtClass:
362     K = CXCursor_LabelStmt;
363     break;
364 
365   case Stmt::AttributedStmtClass:
366     K = CXCursor_UnexposedStmt;
367     break;
368 
369   case Stmt::DeclStmtClass:
370     K = CXCursor_DeclStmt;
371     break;
372 
373   case Stmt::CapturedStmtClass:
374     K = CXCursor_UnexposedStmt;
375     break;
376 
377   case Stmt::IntegerLiteralClass:
378     K = CXCursor_IntegerLiteral;
379     break;
380 
381   case Stmt::FixedPointLiteralClass:
382     K = CXCursor_FixedPointLiteral;
383     break;
384 
385   case Stmt::FloatingLiteralClass:
386     K = CXCursor_FloatingLiteral;
387     break;
388 
389   case Stmt::ImaginaryLiteralClass:
390     K = CXCursor_ImaginaryLiteral;
391     break;
392 
393   case Stmt::StringLiteralClass:
394     K = CXCursor_StringLiteral;
395     break;
396 
397   case Stmt::CharacterLiteralClass:
398     K = CXCursor_CharacterLiteral;
399     break;
400 
401   case Stmt::ConstantExprClass:
402     return MakeCXCursor(cast<ConstantExpr>(S)->getSubExpr(), Parent, TU,
403                         RegionOfInterest);
404 
405   case Stmt::ParenExprClass:
406     K = CXCursor_ParenExpr;
407     break;
408 
409   case Stmt::UnaryOperatorClass:
410     K = CXCursor_UnaryOperator;
411     break;
412 
413   case Stmt::UnaryExprOrTypeTraitExprClass:
414   case Stmt::CXXNoexceptExprClass:
415     K = CXCursor_UnaryExpr;
416     break;
417 
418   case Stmt::MSPropertySubscriptExprClass:
419   case Stmt::ArraySubscriptExprClass:
420     K = CXCursor_ArraySubscriptExpr;
421     break;
422 
423   case Stmt::MatrixSubscriptExprClass:
424     // TODO: add support for MatrixSubscriptExpr.
425     K = CXCursor_UnexposedExpr;
426     break;
427 
428   case Stmt::OMPArraySectionExprClass:
429     K = CXCursor_OMPArraySectionExpr;
430     break;
431 
432   case Stmt::OMPArrayShapingExprClass:
433     K = CXCursor_OMPArrayShapingExpr;
434     break;
435 
436   case Stmt::OMPIteratorExprClass:
437     K = CXCursor_OMPIteratorExpr;
438     break;
439 
440   case Stmt::BinaryOperatorClass:
441     K = CXCursor_BinaryOperator;
442     break;
443 
444   case Stmt::CompoundAssignOperatorClass:
445     K = CXCursor_CompoundAssignOperator;
446     break;
447 
448   case Stmt::ConditionalOperatorClass:
449     K = CXCursor_ConditionalOperator;
450     break;
451 
452   case Stmt::CStyleCastExprClass:
453     K = CXCursor_CStyleCastExpr;
454     break;
455 
456   case Stmt::CompoundLiteralExprClass:
457     K = CXCursor_CompoundLiteralExpr;
458     break;
459 
460   case Stmt::InitListExprClass:
461     K = CXCursor_InitListExpr;
462     break;
463 
464   case Stmt::AddrLabelExprClass:
465     K = CXCursor_AddrLabelExpr;
466     break;
467 
468   case Stmt::StmtExprClass:
469     K = CXCursor_StmtExpr;
470     break;
471 
472   case Stmt::GenericSelectionExprClass:
473     K = CXCursor_GenericSelectionExpr;
474     break;
475 
476   case Stmt::GNUNullExprClass:
477     K = CXCursor_GNUNullExpr;
478     break;
479 
480   case Stmt::CXXStaticCastExprClass:
481     K = CXCursor_CXXStaticCastExpr;
482     break;
483 
484   case Stmt::CXXDynamicCastExprClass:
485     K = CXCursor_CXXDynamicCastExpr;
486     break;
487 
488   case Stmt::CXXReinterpretCastExprClass:
489     K = CXCursor_CXXReinterpretCastExpr;
490     break;
491 
492   case Stmt::CXXConstCastExprClass:
493     K = CXCursor_CXXConstCastExpr;
494     break;
495 
496   case Stmt::CXXFunctionalCastExprClass:
497     K = CXCursor_CXXFunctionalCastExpr;
498     break;
499 
500   case Stmt::CXXAddrspaceCastExprClass:
501     K = CXCursor_CXXAddrspaceCastExpr;
502     break;
503 
504   case Stmt::CXXTypeidExprClass:
505     K = CXCursor_CXXTypeidExpr;
506     break;
507 
508   case Stmt::CXXBoolLiteralExprClass:
509     K = CXCursor_CXXBoolLiteralExpr;
510     break;
511 
512   case Stmt::CXXNullPtrLiteralExprClass:
513     K = CXCursor_CXXNullPtrLiteralExpr;
514     break;
515 
516   case Stmt::CXXThisExprClass:
517     K = CXCursor_CXXThisExpr;
518     break;
519 
520   case Stmt::CXXThrowExprClass:
521     K = CXCursor_CXXThrowExpr;
522     break;
523 
524   case Stmt::CXXNewExprClass:
525     K = CXCursor_CXXNewExpr;
526     break;
527 
528   case Stmt::CXXDeleteExprClass:
529     K = CXCursor_CXXDeleteExpr;
530     break;
531 
532   case Stmt::ObjCStringLiteralClass:
533     K = CXCursor_ObjCStringLiteral;
534     break;
535 
536   case Stmt::ObjCEncodeExprClass:
537     K = CXCursor_ObjCEncodeExpr;
538     break;
539 
540   case Stmt::ObjCSelectorExprClass:
541     K = CXCursor_ObjCSelectorExpr;
542     break;
543 
544   case Stmt::ObjCProtocolExprClass:
545     K = CXCursor_ObjCProtocolExpr;
546     break;
547 
548   case Stmt::ObjCBoolLiteralExprClass:
549     K = CXCursor_ObjCBoolLiteralExpr;
550     break;
551 
552   case Stmt::ObjCAvailabilityCheckExprClass:
553     K = CXCursor_ObjCAvailabilityCheckExpr;
554     break;
555 
556   case Stmt::ObjCBridgedCastExprClass:
557     K = CXCursor_ObjCBridgedCastExpr;
558     break;
559 
560   case Stmt::BlockExprClass:
561     K = CXCursor_BlockExpr;
562     break;
563 
564   case Stmt::PackExpansionExprClass:
565     K = CXCursor_PackExpansionExpr;
566     break;
567 
568   case Stmt::SizeOfPackExprClass:
569     K = CXCursor_SizeOfPackExpr;
570     break;
571 
572   case Stmt::DeclRefExprClass:
573     if (const ImplicitParamDecl *IPD = dyn_cast_or_null<ImplicitParamDecl>(
574             cast<DeclRefExpr>(S)->getDecl())) {
575       if (const ObjCMethodDecl *MD =
576               dyn_cast<ObjCMethodDecl>(IPD->getDeclContext())) {
577         if (MD->getSelfDecl() == IPD) {
578           K = CXCursor_ObjCSelfExpr;
579           break;
580         }
581       }
582     }
583 
584     K = CXCursor_DeclRefExpr;
585     break;
586 
587   case Stmt::DependentScopeDeclRefExprClass:
588   case Stmt::SubstNonTypeTemplateParmExprClass:
589   case Stmt::SubstNonTypeTemplateParmPackExprClass:
590   case Stmt::FunctionParmPackExprClass:
591   case Stmt::UnresolvedLookupExprClass:
592   case Stmt::TypoExprClass: // A typo could actually be a DeclRef or a MemberRef
593     K = CXCursor_DeclRefExpr;
594     break;
595 
596   case Stmt::CXXDependentScopeMemberExprClass:
597   case Stmt::CXXPseudoDestructorExprClass:
598   case Stmt::MemberExprClass:
599   case Stmt::MSPropertyRefExprClass:
600   case Stmt::ObjCIsaExprClass:
601   case Stmt::ObjCIvarRefExprClass:
602   case Stmt::ObjCPropertyRefExprClass:
603   case Stmt::UnresolvedMemberExprClass:
604     K = CXCursor_MemberRefExpr;
605     break;
606 
607   case Stmt::CallExprClass:
608   case Stmt::CXXOperatorCallExprClass:
609   case Stmt::CXXMemberCallExprClass:
610   case Stmt::CUDAKernelCallExprClass:
611   case Stmt::CXXConstructExprClass:
612   case Stmt::CXXInheritedCtorInitExprClass:
613   case Stmt::CXXTemporaryObjectExprClass:
614   case Stmt::CXXUnresolvedConstructExprClass:
615   case Stmt::UserDefinedLiteralClass:
616     K = CXCursor_CallExpr;
617     break;
618 
619   case Stmt::LambdaExprClass:
620     K = CXCursor_LambdaExpr;
621     break;
622 
623   case Stmt::ObjCMessageExprClass: {
624     K = CXCursor_ObjCMessageExpr;
625     int SelectorIdIndex = -1;
626     // Check if cursor points to a selector id.
627     if (RegionOfInterest.isValid() &&
628         RegionOfInterest.getBegin() == RegionOfInterest.getEnd()) {
629       SmallVector<SourceLocation, 16> SelLocs;
630       cast<ObjCMessageExpr>(S)->getSelectorLocs(SelLocs);
631       SmallVectorImpl<SourceLocation>::iterator I =
632           llvm::find(SelLocs, RegionOfInterest.getBegin());
633       if (I != SelLocs.end())
634         SelectorIdIndex = I - SelLocs.begin();
635     }
636     CXCursor C = {K, 0, {Parent, S, TU}};
637     return getSelectorIdentifierCursor(SelectorIdIndex, C);
638   }
639 
640   case Stmt::MSDependentExistsStmtClass:
641     K = CXCursor_UnexposedStmt;
642     break;
643   case Stmt::OMPCanonicalLoopClass:
644     K = CXCursor_OMPCanonicalLoop;
645     break;
646   case Stmt::OMPMetaDirectiveClass:
647     K = CXCursor_OMPMetaDirective;
648     break;
649   case Stmt::OMPParallelDirectiveClass:
650     K = CXCursor_OMPParallelDirective;
651     break;
652   case Stmt::OMPSimdDirectiveClass:
653     K = CXCursor_OMPSimdDirective;
654     break;
655   case Stmt::OMPTileDirectiveClass:
656     K = CXCursor_OMPTileDirective;
657     break;
658   case Stmt::OMPUnrollDirectiveClass:
659     K = CXCursor_OMPUnrollDirective;
660     break;
661   case Stmt::OMPForDirectiveClass:
662     K = CXCursor_OMPForDirective;
663     break;
664   case Stmt::OMPForSimdDirectiveClass:
665     K = CXCursor_OMPForSimdDirective;
666     break;
667   case Stmt::OMPSectionsDirectiveClass:
668     K = CXCursor_OMPSectionsDirective;
669     break;
670   case Stmt::OMPSectionDirectiveClass:
671     K = CXCursor_OMPSectionDirective;
672     break;
673   case Stmt::OMPSingleDirectiveClass:
674     K = CXCursor_OMPSingleDirective;
675     break;
676   case Stmt::OMPMasterDirectiveClass:
677     K = CXCursor_OMPMasterDirective;
678     break;
679   case Stmt::OMPCriticalDirectiveClass:
680     K = CXCursor_OMPCriticalDirective;
681     break;
682   case Stmt::OMPParallelForDirectiveClass:
683     K = CXCursor_OMPParallelForDirective;
684     break;
685   case Stmt::OMPParallelForSimdDirectiveClass:
686     K = CXCursor_OMPParallelForSimdDirective;
687     break;
688   case Stmt::OMPParallelMasterDirectiveClass:
689     K = CXCursor_OMPParallelMasterDirective;
690     break;
691   case Stmt::OMPParallelSectionsDirectiveClass:
692     K = CXCursor_OMPParallelSectionsDirective;
693     break;
694   case Stmt::OMPTaskDirectiveClass:
695     K = CXCursor_OMPTaskDirective;
696     break;
697   case Stmt::OMPTaskyieldDirectiveClass:
698     K = CXCursor_OMPTaskyieldDirective;
699     break;
700   case Stmt::OMPBarrierDirectiveClass:
701     K = CXCursor_OMPBarrierDirective;
702     break;
703   case Stmt::OMPTaskwaitDirectiveClass:
704     K = CXCursor_OMPTaskwaitDirective;
705     break;
706   case Stmt::OMPTaskgroupDirectiveClass:
707     K = CXCursor_OMPTaskgroupDirective;
708     break;
709   case Stmt::OMPFlushDirectiveClass:
710     K = CXCursor_OMPFlushDirective;
711     break;
712   case Stmt::OMPDepobjDirectiveClass:
713     K = CXCursor_OMPDepobjDirective;
714     break;
715   case Stmt::OMPScanDirectiveClass:
716     K = CXCursor_OMPScanDirective;
717     break;
718   case Stmt::OMPOrderedDirectiveClass:
719     K = CXCursor_OMPOrderedDirective;
720     break;
721   case Stmt::OMPAtomicDirectiveClass:
722     K = CXCursor_OMPAtomicDirective;
723     break;
724   case Stmt::OMPTargetDirectiveClass:
725     K = CXCursor_OMPTargetDirective;
726     break;
727   case Stmt::OMPTargetDataDirectiveClass:
728     K = CXCursor_OMPTargetDataDirective;
729     break;
730   case Stmt::OMPTargetEnterDataDirectiveClass:
731     K = CXCursor_OMPTargetEnterDataDirective;
732     break;
733   case Stmt::OMPTargetExitDataDirectiveClass:
734     K = CXCursor_OMPTargetExitDataDirective;
735     break;
736   case Stmt::OMPTargetParallelDirectiveClass:
737     K = CXCursor_OMPTargetParallelDirective;
738     break;
739   case Stmt::OMPTargetParallelForDirectiveClass:
740     K = CXCursor_OMPTargetParallelForDirective;
741     break;
742   case Stmt::OMPTargetUpdateDirectiveClass:
743     K = CXCursor_OMPTargetUpdateDirective;
744     break;
745   case Stmt::OMPTeamsDirectiveClass:
746     K = CXCursor_OMPTeamsDirective;
747     break;
748   case Stmt::OMPCancellationPointDirectiveClass:
749     K = CXCursor_OMPCancellationPointDirective;
750     break;
751   case Stmt::OMPCancelDirectiveClass:
752     K = CXCursor_OMPCancelDirective;
753     break;
754   case Stmt::OMPTaskLoopDirectiveClass:
755     K = CXCursor_OMPTaskLoopDirective;
756     break;
757   case Stmt::OMPTaskLoopSimdDirectiveClass:
758     K = CXCursor_OMPTaskLoopSimdDirective;
759     break;
760   case Stmt::OMPMasterTaskLoopDirectiveClass:
761     K = CXCursor_OMPMasterTaskLoopDirective;
762     break;
763   case Stmt::OMPMasterTaskLoopSimdDirectiveClass:
764     K = CXCursor_OMPMasterTaskLoopSimdDirective;
765     break;
766   case Stmt::OMPParallelMasterTaskLoopDirectiveClass:
767     K = CXCursor_OMPParallelMasterTaskLoopDirective;
768     break;
769   case Stmt::OMPParallelMasterTaskLoopSimdDirectiveClass:
770     K = CXCursor_OMPParallelMasterTaskLoopSimdDirective;
771     break;
772   case Stmt::OMPDistributeDirectiveClass:
773     K = CXCursor_OMPDistributeDirective;
774     break;
775   case Stmt::OMPDistributeParallelForDirectiveClass:
776     K = CXCursor_OMPDistributeParallelForDirective;
777     break;
778   case Stmt::OMPDistributeParallelForSimdDirectiveClass:
779     K = CXCursor_OMPDistributeParallelForSimdDirective;
780     break;
781   case Stmt::OMPDistributeSimdDirectiveClass:
782     K = CXCursor_OMPDistributeSimdDirective;
783     break;
784   case Stmt::OMPTargetParallelForSimdDirectiveClass:
785     K = CXCursor_OMPTargetParallelForSimdDirective;
786     break;
787   case Stmt::OMPTargetSimdDirectiveClass:
788     K = CXCursor_OMPTargetSimdDirective;
789     break;
790   case Stmt::OMPTeamsDistributeDirectiveClass:
791     K = CXCursor_OMPTeamsDistributeDirective;
792     break;
793   case Stmt::OMPTeamsDistributeSimdDirectiveClass:
794     K = CXCursor_OMPTeamsDistributeSimdDirective;
795     break;
796   case Stmt::OMPTeamsDistributeParallelForSimdDirectiveClass:
797     K = CXCursor_OMPTeamsDistributeParallelForSimdDirective;
798     break;
799   case Stmt::OMPTeamsDistributeParallelForDirectiveClass:
800     K = CXCursor_OMPTeamsDistributeParallelForDirective;
801     break;
802   case Stmt::OMPTargetTeamsDirectiveClass:
803     K = CXCursor_OMPTargetTeamsDirective;
804     break;
805   case Stmt::OMPTargetTeamsDistributeDirectiveClass:
806     K = CXCursor_OMPTargetTeamsDistributeDirective;
807     break;
808   case Stmt::OMPTargetTeamsDistributeParallelForDirectiveClass:
809     K = CXCursor_OMPTargetTeamsDistributeParallelForDirective;
810     break;
811   case Stmt::OMPTargetTeamsDistributeParallelForSimdDirectiveClass:
812     K = CXCursor_OMPTargetTeamsDistributeParallelForSimdDirective;
813     break;
814   case Stmt::OMPTargetTeamsDistributeSimdDirectiveClass:
815     K = CXCursor_OMPTargetTeamsDistributeSimdDirective;
816     break;
817   case Stmt::OMPInteropDirectiveClass:
818     K = CXCursor_OMPInteropDirective;
819     break;
820   case Stmt::OMPDispatchDirectiveClass:
821     K = CXCursor_OMPDispatchDirective;
822     break;
823   case Stmt::OMPMaskedDirectiveClass:
824     K = CXCursor_OMPMaskedDirective;
825     break;
826   case Stmt::BuiltinBitCastExprClass:
827     K = CXCursor_BuiltinBitCastExpr;
828   }
829 
830   CXCursor C = {K, 0, {Parent, S, TU}};
831   return C;
832 }
833 
834 CXCursor cxcursor::MakeCursorObjCSuperClassRef(ObjCInterfaceDecl *Super,
835                                                SourceLocation Loc,
836                                                CXTranslationUnit TU) {
837   assert(Super && TU && "Invalid arguments!");
838   void *RawLoc = Loc.getPtrEncoding();
839   CXCursor C = {CXCursor_ObjCSuperClassRef, 0, {Super, RawLoc, TU}};
840   return C;
841 }
842 
843 std::pair<const ObjCInterfaceDecl *, SourceLocation>
844 cxcursor::getCursorObjCSuperClassRef(CXCursor C) {
845   assert(C.kind == CXCursor_ObjCSuperClassRef);
846   return std::make_pair(static_cast<const ObjCInterfaceDecl *>(C.data[0]),
847                         SourceLocation::getFromPtrEncoding(C.data[1]));
848 }
849 
850 CXCursor cxcursor::MakeCursorObjCProtocolRef(const ObjCProtocolDecl *Proto,
851                                              SourceLocation Loc,
852                                              CXTranslationUnit TU) {
853   assert(Proto && TU && "Invalid arguments!");
854   void *RawLoc = Loc.getPtrEncoding();
855   CXCursor C = {CXCursor_ObjCProtocolRef, 0, {Proto, RawLoc, TU}};
856   return C;
857 }
858 
859 std::pair<const ObjCProtocolDecl *, SourceLocation>
860 cxcursor::getCursorObjCProtocolRef(CXCursor C) {
861   assert(C.kind == CXCursor_ObjCProtocolRef);
862   return std::make_pair(static_cast<const ObjCProtocolDecl *>(C.data[0]),
863                         SourceLocation::getFromPtrEncoding(C.data[1]));
864 }
865 
866 CXCursor cxcursor::MakeCursorObjCClassRef(const ObjCInterfaceDecl *Class,
867                                           SourceLocation Loc,
868                                           CXTranslationUnit TU) {
869   // 'Class' can be null for invalid code.
870   if (!Class)
871     return MakeCXCursorInvalid(CXCursor_InvalidCode);
872   assert(TU && "Invalid arguments!");
873   void *RawLoc = Loc.getPtrEncoding();
874   CXCursor C = {CXCursor_ObjCClassRef, 0, {Class, RawLoc, TU}};
875   return C;
876 }
877 
878 std::pair<const ObjCInterfaceDecl *, SourceLocation>
879 cxcursor::getCursorObjCClassRef(CXCursor C) {
880   assert(C.kind == CXCursor_ObjCClassRef);
881   return std::make_pair(static_cast<const ObjCInterfaceDecl *>(C.data[0]),
882                         SourceLocation::getFromPtrEncoding(C.data[1]));
883 }
884 
885 CXCursor cxcursor::MakeCursorTypeRef(const TypeDecl *Type, SourceLocation Loc,
886                                      CXTranslationUnit TU) {
887   assert(Type && TU && "Invalid arguments!");
888   void *RawLoc = Loc.getPtrEncoding();
889   CXCursor C = {CXCursor_TypeRef, 0, {Type, RawLoc, TU}};
890   return C;
891 }
892 
893 std::pair<const TypeDecl *, SourceLocation>
894 cxcursor::getCursorTypeRef(CXCursor C) {
895   assert(C.kind == CXCursor_TypeRef);
896   return std::make_pair(static_cast<const TypeDecl *>(C.data[0]),
897                         SourceLocation::getFromPtrEncoding(C.data[1]));
898 }
899 
900 CXCursor cxcursor::MakeCursorTemplateRef(const TemplateDecl *Template,
901                                          SourceLocation Loc,
902                                          CXTranslationUnit TU) {
903   assert(Template && TU && "Invalid arguments!");
904   void *RawLoc = Loc.getPtrEncoding();
905   CXCursor C = {CXCursor_TemplateRef, 0, {Template, RawLoc, TU}};
906   return C;
907 }
908 
909 std::pair<const TemplateDecl *, SourceLocation>
910 cxcursor::getCursorTemplateRef(CXCursor C) {
911   assert(C.kind == CXCursor_TemplateRef);
912   return std::make_pair(static_cast<const TemplateDecl *>(C.data[0]),
913                         SourceLocation::getFromPtrEncoding(C.data[1]));
914 }
915 
916 CXCursor cxcursor::MakeCursorNamespaceRef(const NamedDecl *NS,
917                                           SourceLocation Loc,
918                                           CXTranslationUnit TU) {
919 
920   assert(NS && (isa<NamespaceDecl>(NS) || isa<NamespaceAliasDecl>(NS)) && TU &&
921          "Invalid arguments!");
922   void *RawLoc = Loc.getPtrEncoding();
923   CXCursor C = {CXCursor_NamespaceRef, 0, {NS, RawLoc, TU}};
924   return C;
925 }
926 
927 std::pair<const NamedDecl *, SourceLocation>
928 cxcursor::getCursorNamespaceRef(CXCursor C) {
929   assert(C.kind == CXCursor_NamespaceRef);
930   return std::make_pair(static_cast<const NamedDecl *>(C.data[0]),
931                         SourceLocation::getFromPtrEncoding(C.data[1]));
932 }
933 
934 CXCursor cxcursor::MakeCursorVariableRef(const VarDecl *Var, SourceLocation Loc,
935                                          CXTranslationUnit TU) {
936 
937   assert(Var && TU && "Invalid arguments!");
938   void *RawLoc = Loc.getPtrEncoding();
939   CXCursor C = {CXCursor_VariableRef, 0, {Var, RawLoc, TU}};
940   return C;
941 }
942 
943 std::pair<const VarDecl *, SourceLocation>
944 cxcursor::getCursorVariableRef(CXCursor C) {
945   assert(C.kind == CXCursor_VariableRef);
946   return std::make_pair(static_cast<const VarDecl *>(C.data[0]),
947                         SourceLocation::getFromPtrEncoding(C.data[1]));
948 }
949 
950 CXCursor cxcursor::MakeCursorMemberRef(const FieldDecl *Field,
951                                        SourceLocation Loc,
952                                        CXTranslationUnit TU) {
953 
954   assert(Field && TU && "Invalid arguments!");
955   void *RawLoc = Loc.getPtrEncoding();
956   CXCursor C = {CXCursor_MemberRef, 0, {Field, RawLoc, TU}};
957   return C;
958 }
959 
960 std::pair<const FieldDecl *, SourceLocation>
961 cxcursor::getCursorMemberRef(CXCursor C) {
962   assert(C.kind == CXCursor_MemberRef);
963   return std::make_pair(static_cast<const FieldDecl *>(C.data[0]),
964                         SourceLocation::getFromPtrEncoding(C.data[1]));
965 }
966 
967 CXCursor cxcursor::MakeCursorCXXBaseSpecifier(const CXXBaseSpecifier *B,
968                                               CXTranslationUnit TU) {
969   CXCursor C = {CXCursor_CXXBaseSpecifier, 0, {B, nullptr, TU}};
970   return C;
971 }
972 
973 const CXXBaseSpecifier *cxcursor::getCursorCXXBaseSpecifier(CXCursor C) {
974   assert(C.kind == CXCursor_CXXBaseSpecifier);
975   return static_cast<const CXXBaseSpecifier *>(C.data[0]);
976 }
977 
978 CXCursor cxcursor::MakePreprocessingDirectiveCursor(SourceRange Range,
979                                                     CXTranslationUnit TU) {
980   CXCursor C = {
981       CXCursor_PreprocessingDirective,
982       0,
983       {Range.getBegin().getPtrEncoding(), Range.getEnd().getPtrEncoding(), TU}};
984   return C;
985 }
986 
987 SourceRange cxcursor::getCursorPreprocessingDirective(CXCursor C) {
988   assert(C.kind == CXCursor_PreprocessingDirective);
989   SourceRange Range(SourceLocation::getFromPtrEncoding(C.data[0]),
990                     SourceLocation::getFromPtrEncoding(C.data[1]));
991   ASTUnit *TU = getCursorASTUnit(C);
992   return TU->mapRangeFromPreamble(Range);
993 }
994 
995 CXCursor cxcursor::MakeMacroDefinitionCursor(const MacroDefinitionRecord *MI,
996                                              CXTranslationUnit TU) {
997   CXCursor C = {CXCursor_MacroDefinition, 0, {MI, nullptr, TU}};
998   return C;
999 }
1000 
1001 const MacroDefinitionRecord *cxcursor::getCursorMacroDefinition(CXCursor C) {
1002   assert(C.kind == CXCursor_MacroDefinition);
1003   return static_cast<const MacroDefinitionRecord *>(C.data[0]);
1004 }
1005 
1006 CXCursor cxcursor::MakeMacroExpansionCursor(MacroExpansion *MI,
1007                                             CXTranslationUnit TU) {
1008   CXCursor C = {CXCursor_MacroExpansion, 0, {MI, nullptr, TU}};
1009   return C;
1010 }
1011 
1012 CXCursor cxcursor::MakeMacroExpansionCursor(MacroDefinitionRecord *MI,
1013                                             SourceLocation Loc,
1014                                             CXTranslationUnit TU) {
1015   assert(Loc.isValid());
1016   CXCursor C = {CXCursor_MacroExpansion, 0, {MI, Loc.getPtrEncoding(), TU}};
1017   return C;
1018 }
1019 
1020 const IdentifierInfo *cxcursor::MacroExpansionCursor::getName() const {
1021   if (isPseudo())
1022     return getAsMacroDefinition()->getName();
1023   return getAsMacroExpansion()->getName();
1024 }
1025 const MacroDefinitionRecord *
1026 cxcursor::MacroExpansionCursor::getDefinition() const {
1027   if (isPseudo())
1028     return getAsMacroDefinition();
1029   return getAsMacroExpansion()->getDefinition();
1030 }
1031 SourceRange cxcursor::MacroExpansionCursor::getSourceRange() const {
1032   if (isPseudo())
1033     return getPseudoLoc();
1034   return getAsMacroExpansion()->getSourceRange();
1035 }
1036 
1037 CXCursor cxcursor::MakeInclusionDirectiveCursor(InclusionDirective *ID,
1038                                                 CXTranslationUnit TU) {
1039   CXCursor C = {CXCursor_InclusionDirective, 0, {ID, nullptr, TU}};
1040   return C;
1041 }
1042 
1043 const InclusionDirective *cxcursor::getCursorInclusionDirective(CXCursor C) {
1044   assert(C.kind == CXCursor_InclusionDirective);
1045   return static_cast<const InclusionDirective *>(C.data[0]);
1046 }
1047 
1048 CXCursor cxcursor::MakeCursorLabelRef(LabelStmt *Label, SourceLocation Loc,
1049                                       CXTranslationUnit TU) {
1050 
1051   assert(Label && TU && "Invalid arguments!");
1052   void *RawLoc = Loc.getPtrEncoding();
1053   CXCursor C = {CXCursor_LabelRef, 0, {Label, RawLoc, TU}};
1054   return C;
1055 }
1056 
1057 std::pair<const LabelStmt *, SourceLocation>
1058 cxcursor::getCursorLabelRef(CXCursor C) {
1059   assert(C.kind == CXCursor_LabelRef);
1060   return std::make_pair(static_cast<const LabelStmt *>(C.data[0]),
1061                         SourceLocation::getFromPtrEncoding(C.data[1]));
1062 }
1063 
1064 CXCursor cxcursor::MakeCursorOverloadedDeclRef(const OverloadExpr *E,
1065                                                CXTranslationUnit TU) {
1066   assert(E && TU && "Invalid arguments!");
1067   OverloadedDeclRefStorage Storage(E);
1068   void *RawLoc = E->getNameLoc().getPtrEncoding();
1069   CXCursor C = {
1070       CXCursor_OverloadedDeclRef, 0, {Storage.getOpaqueValue(), RawLoc, TU}};
1071   return C;
1072 }
1073 
1074 CXCursor cxcursor::MakeCursorOverloadedDeclRef(const Decl *D,
1075                                                SourceLocation Loc,
1076                                                CXTranslationUnit TU) {
1077   assert(D && TU && "Invalid arguments!");
1078   void *RawLoc = Loc.getPtrEncoding();
1079   OverloadedDeclRefStorage Storage(D);
1080   CXCursor C = {
1081       CXCursor_OverloadedDeclRef, 0, {Storage.getOpaqueValue(), RawLoc, TU}};
1082   return C;
1083 }
1084 
1085 CXCursor cxcursor::MakeCursorOverloadedDeclRef(TemplateName Name,
1086                                                SourceLocation Loc,
1087                                                CXTranslationUnit TU) {
1088   assert(Name.getAsOverloadedTemplate() && TU && "Invalid arguments!");
1089   void *RawLoc = Loc.getPtrEncoding();
1090   OverloadedDeclRefStorage Storage(Name.getAsOverloadedTemplate());
1091   CXCursor C = {
1092       CXCursor_OverloadedDeclRef, 0, {Storage.getOpaqueValue(), RawLoc, TU}};
1093   return C;
1094 }
1095 
1096 std::pair<cxcursor::OverloadedDeclRefStorage, SourceLocation>
1097 cxcursor::getCursorOverloadedDeclRef(CXCursor C) {
1098   assert(C.kind == CXCursor_OverloadedDeclRef);
1099   return std::make_pair(OverloadedDeclRefStorage::getFromOpaqueValue(
1100                             const_cast<void *>(C.data[0])),
1101                         SourceLocation::getFromPtrEncoding(C.data[1]));
1102 }
1103 
1104 const Decl *cxcursor::getCursorDecl(CXCursor Cursor) {
1105   return static_cast<const Decl *>(Cursor.data[0]);
1106 }
1107 
1108 const Expr *cxcursor::getCursorExpr(CXCursor Cursor) {
1109   return dyn_cast_or_null<Expr>(getCursorStmt(Cursor));
1110 }
1111 
1112 const Stmt *cxcursor::getCursorStmt(CXCursor Cursor) {
1113   if (Cursor.kind == CXCursor_ObjCSuperClassRef ||
1114       Cursor.kind == CXCursor_ObjCProtocolRef ||
1115       Cursor.kind == CXCursor_ObjCClassRef)
1116     return nullptr;
1117 
1118   return static_cast<const Stmt *>(Cursor.data[1]);
1119 }
1120 
1121 const Attr *cxcursor::getCursorAttr(CXCursor Cursor) {
1122   return static_cast<const Attr *>(Cursor.data[1]);
1123 }
1124 
1125 ASTContext &cxcursor::getCursorContext(CXCursor Cursor) {
1126   return getCursorASTUnit(Cursor)->getASTContext();
1127 }
1128 
1129 ASTUnit *cxcursor::getCursorASTUnit(CXCursor Cursor) {
1130   CXTranslationUnit TU = getCursorTU(Cursor);
1131   if (!TU)
1132     return nullptr;
1133   return cxtu::getASTUnit(TU);
1134 }
1135 
1136 CXTranslationUnit cxcursor::getCursorTU(CXCursor Cursor) {
1137   return static_cast<CXTranslationUnit>(const_cast<void *>(Cursor.data[2]));
1138 }
1139 
1140 void cxcursor::getOverriddenCursors(CXCursor cursor,
1141                                     SmallVectorImpl<CXCursor> &overridden) {
1142   assert(clang_isDeclaration(cursor.kind));
1143   const NamedDecl *D = dyn_cast_or_null<NamedDecl>(getCursorDecl(cursor));
1144   if (!D)
1145     return;
1146 
1147   CXTranslationUnit TU = getCursorTU(cursor);
1148   SmallVector<const NamedDecl *, 8> OverDecls;
1149   D->getASTContext().getOverriddenMethods(D, OverDecls);
1150 
1151   for (SmallVectorImpl<const NamedDecl *>::iterator I = OverDecls.begin(),
1152                                                     E = OverDecls.end();
1153        I != E; ++I) {
1154     overridden.push_back(MakeCXCursor(*I, TU));
1155   }
1156 }
1157 
1158 std::pair<int, SourceLocation>
1159 cxcursor::getSelectorIdentifierIndexAndLoc(CXCursor cursor) {
1160   if (cursor.kind == CXCursor_ObjCMessageExpr) {
1161     if (cursor.xdata != -1)
1162       return std::make_pair(cursor.xdata,
1163                             cast<ObjCMessageExpr>(getCursorExpr(cursor))
1164                                 ->getSelectorLoc(cursor.xdata));
1165   } else if (cursor.kind == CXCursor_ObjCClassMethodDecl ||
1166              cursor.kind == CXCursor_ObjCInstanceMethodDecl) {
1167     if (cursor.xdata != -1)
1168       return std::make_pair(cursor.xdata,
1169                             cast<ObjCMethodDecl>(getCursorDecl(cursor))
1170                                 ->getSelectorLoc(cursor.xdata));
1171   }
1172 
1173   return std::make_pair(-1, SourceLocation());
1174 }
1175 
1176 CXCursor cxcursor::getSelectorIdentifierCursor(int SelIdx, CXCursor cursor) {
1177   CXCursor newCursor = cursor;
1178 
1179   if (cursor.kind == CXCursor_ObjCMessageExpr) {
1180     if (SelIdx == -1 ||
1181         unsigned(SelIdx) >=
1182             cast<ObjCMessageExpr>(getCursorExpr(cursor))->getNumSelectorLocs())
1183       newCursor.xdata = -1;
1184     else
1185       newCursor.xdata = SelIdx;
1186   } else if (cursor.kind == CXCursor_ObjCClassMethodDecl ||
1187              cursor.kind == CXCursor_ObjCInstanceMethodDecl) {
1188     if (SelIdx == -1 ||
1189         unsigned(SelIdx) >=
1190             cast<ObjCMethodDecl>(getCursorDecl(cursor))->getNumSelectorLocs())
1191       newCursor.xdata = -1;
1192     else
1193       newCursor.xdata = SelIdx;
1194   }
1195 
1196   return newCursor;
1197 }
1198 
1199 CXCursor cxcursor::getTypeRefCursor(CXCursor cursor) {
1200   if (cursor.kind != CXCursor_CallExpr)
1201     return cursor;
1202 
1203   if (cursor.xdata == 0)
1204     return cursor;
1205 
1206   const Expr *E = getCursorExpr(cursor);
1207   TypeSourceInfo *Type = nullptr;
1208   if (const CXXUnresolvedConstructExpr *UnCtor =
1209           dyn_cast<CXXUnresolvedConstructExpr>(E)) {
1210     Type = UnCtor->getTypeSourceInfo();
1211   } else if (const CXXTemporaryObjectExpr *Tmp =
1212                  dyn_cast<CXXTemporaryObjectExpr>(E)) {
1213     Type = Tmp->getTypeSourceInfo();
1214   }
1215 
1216   if (!Type)
1217     return cursor;
1218 
1219   CXTranslationUnit TU = getCursorTU(cursor);
1220   QualType Ty = Type->getType();
1221   TypeLoc TL = Type->getTypeLoc();
1222   SourceLocation Loc = TL.getBeginLoc();
1223 
1224   if (const ElaboratedType *ElabT = Ty->getAs<ElaboratedType>()) {
1225     Ty = ElabT->getNamedType();
1226     ElaboratedTypeLoc ElabTL = TL.castAs<ElaboratedTypeLoc>();
1227     Loc = ElabTL.getNamedTypeLoc().getBeginLoc();
1228   }
1229 
1230   if (const TypedefType *Typedef = Ty->getAs<TypedefType>())
1231     return MakeCursorTypeRef(Typedef->getDecl(), Loc, TU);
1232   if (const TagType *Tag = Ty->getAs<TagType>())
1233     return MakeCursorTypeRef(Tag->getDecl(), Loc, TU);
1234   if (const TemplateTypeParmType *TemplP = Ty->getAs<TemplateTypeParmType>())
1235     return MakeCursorTypeRef(TemplP->getDecl(), Loc, TU);
1236 
1237   return cursor;
1238 }
1239 
1240 bool cxcursor::operator==(CXCursor X, CXCursor Y) {
1241   return X.kind == Y.kind && X.data[0] == Y.data[0] && X.data[1] == Y.data[1] &&
1242          X.data[2] == Y.data[2];
1243 }
1244 
1245 // FIXME: Remove once we can model DeclGroups and their appropriate ranges
1246 // properly in the ASTs.
1247 bool cxcursor::isFirstInDeclGroup(CXCursor C) {
1248   assert(clang_isDeclaration(C.kind));
1249   return ((uintptr_t)(C.data[1])) != 0;
1250 }
1251 
1252 //===----------------------------------------------------------------------===//
1253 // libclang CXCursor APIs
1254 //===----------------------------------------------------------------------===//
1255 
1256 int clang_Cursor_isNull(CXCursor cursor) {
1257   return clang_equalCursors(cursor, clang_getNullCursor());
1258 }
1259 
1260 CXTranslationUnit clang_Cursor_getTranslationUnit(CXCursor cursor) {
1261   return getCursorTU(cursor);
1262 }
1263 
1264 int clang_Cursor_getNumArguments(CXCursor C) {
1265   if (clang_isDeclaration(C.kind)) {
1266     const Decl *D = cxcursor::getCursorDecl(C);
1267     if (const ObjCMethodDecl *MD = dyn_cast_or_null<ObjCMethodDecl>(D))
1268       return MD->param_size();
1269     if (const FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(D))
1270       return FD->param_size();
1271   }
1272 
1273   if (clang_isExpression(C.kind)) {
1274     const Expr *E = cxcursor::getCursorExpr(C);
1275     if (const CallExpr *CE = dyn_cast<CallExpr>(E)) {
1276       return CE->getNumArgs();
1277     }
1278     if (const CXXConstructExpr *CE = dyn_cast<CXXConstructExpr>(E)) {
1279       return CE->getNumArgs();
1280     }
1281   }
1282 
1283   return -1;
1284 }
1285 
1286 CXCursor clang_Cursor_getArgument(CXCursor C, unsigned i) {
1287   if (clang_isDeclaration(C.kind)) {
1288     const Decl *D = cxcursor::getCursorDecl(C);
1289     if (const ObjCMethodDecl *MD = dyn_cast_or_null<ObjCMethodDecl>(D)) {
1290       if (i < MD->param_size())
1291         return cxcursor::MakeCXCursor(MD->parameters()[i],
1292                                       cxcursor::getCursorTU(C));
1293     } else if (const FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(D)) {
1294       if (i < FD->param_size())
1295         return cxcursor::MakeCXCursor(FD->parameters()[i],
1296                                       cxcursor::getCursorTU(C));
1297     }
1298   }
1299 
1300   if (clang_isExpression(C.kind)) {
1301     const Expr *E = cxcursor::getCursorExpr(C);
1302     if (const CallExpr *CE = dyn_cast<CallExpr>(E)) {
1303       if (i < CE->getNumArgs()) {
1304         return cxcursor::MakeCXCursor(CE->getArg(i), getCursorDecl(C),
1305                                       cxcursor::getCursorTU(C));
1306       }
1307     }
1308     if (const CXXConstructExpr *CE = dyn_cast<CXXConstructExpr>(E)) {
1309       if (i < CE->getNumArgs()) {
1310         return cxcursor::MakeCXCursor(CE->getArg(i), getCursorDecl(C),
1311                                       cxcursor::getCursorTU(C));
1312       }
1313     }
1314   }
1315 
1316   return clang_getNullCursor();
1317 }
1318 
1319 int clang_Cursor_getNumTemplateArguments(CXCursor C) {
1320   if (clang_getCursorKind(C) != CXCursor_FunctionDecl) {
1321     return -1;
1322   }
1323 
1324   const FunctionDecl *FD =
1325       llvm::dyn_cast_or_null<clang::FunctionDecl>(getCursorDecl(C));
1326   if (!FD) {
1327     return -1;
1328   }
1329 
1330   const FunctionTemplateSpecializationInfo *SpecInfo =
1331       FD->getTemplateSpecializationInfo();
1332   if (!SpecInfo) {
1333     return -1;
1334   }
1335 
1336   return SpecInfo->TemplateArguments->size();
1337 }
1338 
1339 enum CXGetTemplateArgumentStatus {
1340   /** The operation completed successfully */
1341   CXGetTemplateArgumentStatus_Success = 0,
1342 
1343   /** The specified cursor did not represent a FunctionDecl. */
1344   CXGetTemplateArgumentStatus_CursorNotFunctionDecl = -1,
1345 
1346   /** The specified cursor was not castable to a FunctionDecl. */
1347   CXGetTemplateArgumentStatus_BadFunctionDeclCast = -2,
1348 
1349   /** A NULL FunctionTemplateSpecializationInfo was retrieved. */
1350   CXGetTemplateArgumentStatus_NullTemplSpecInfo = -3,
1351 
1352   /** An invalid (OOB) argument index was specified */
1353   CXGetTemplateArgumentStatus_InvalidIndex = -4
1354 };
1355 
1356 static int clang_Cursor_getTemplateArgument(CXCursor C, unsigned I,
1357                                             TemplateArgument *TA) {
1358   if (clang_getCursorKind(C) != CXCursor_FunctionDecl) {
1359     return CXGetTemplateArgumentStatus_CursorNotFunctionDecl;
1360   }
1361 
1362   const FunctionDecl *FD =
1363       llvm::dyn_cast_or_null<clang::FunctionDecl>(getCursorDecl(C));
1364   if (!FD) {
1365     return CXGetTemplateArgumentStatus_BadFunctionDeclCast;
1366   }
1367 
1368   const FunctionTemplateSpecializationInfo *SpecInfo =
1369       FD->getTemplateSpecializationInfo();
1370   if (!SpecInfo) {
1371     return CXGetTemplateArgumentStatus_NullTemplSpecInfo;
1372   }
1373 
1374   if (I >= SpecInfo->TemplateArguments->size()) {
1375     return CXGetTemplateArgumentStatus_InvalidIndex;
1376   }
1377 
1378   *TA = SpecInfo->TemplateArguments->get(I);
1379   return 0;
1380 }
1381 
1382 enum CXTemplateArgumentKind clang_Cursor_getTemplateArgumentKind(CXCursor C,
1383                                                                  unsigned I) {
1384   TemplateArgument TA;
1385   if (clang_Cursor_getTemplateArgument(C, I, &TA)) {
1386     return CXTemplateArgumentKind_Invalid;
1387   }
1388 
1389   switch (TA.getKind()) {
1390   case TemplateArgument::Null:
1391     return CXTemplateArgumentKind_Null;
1392   case TemplateArgument::Type:
1393     return CXTemplateArgumentKind_Type;
1394   case TemplateArgument::Declaration:
1395     return CXTemplateArgumentKind_Declaration;
1396   case TemplateArgument::NullPtr:
1397     return CXTemplateArgumentKind_NullPtr;
1398   case TemplateArgument::Integral:
1399     return CXTemplateArgumentKind_Integral;
1400   case TemplateArgument::Template:
1401     return CXTemplateArgumentKind_Template;
1402   case TemplateArgument::TemplateExpansion:
1403     return CXTemplateArgumentKind_TemplateExpansion;
1404   case TemplateArgument::Expression:
1405     return CXTemplateArgumentKind_Expression;
1406   case TemplateArgument::Pack:
1407     return CXTemplateArgumentKind_Pack;
1408   }
1409 
1410   return CXTemplateArgumentKind_Invalid;
1411 }
1412 
1413 CXType clang_Cursor_getTemplateArgumentType(CXCursor C, unsigned I) {
1414   TemplateArgument TA;
1415   if (clang_Cursor_getTemplateArgument(C, I, &TA) !=
1416       CXGetTemplateArgumentStatus_Success) {
1417     return cxtype::MakeCXType(QualType(), getCursorTU(C));
1418   }
1419 
1420   if (TA.getKind() != TemplateArgument::Type) {
1421     return cxtype::MakeCXType(QualType(), getCursorTU(C));
1422   }
1423 
1424   return cxtype::MakeCXType(TA.getAsType(), getCursorTU(C));
1425 }
1426 
1427 long long clang_Cursor_getTemplateArgumentValue(CXCursor C, unsigned I) {
1428   TemplateArgument TA;
1429   if (clang_Cursor_getTemplateArgument(C, I, &TA) !=
1430       CXGetTemplateArgumentStatus_Success) {
1431     assert(0 && "Unable to retrieve TemplateArgument");
1432     return 0;
1433   }
1434 
1435   if (TA.getKind() != TemplateArgument::Integral) {
1436     assert(0 && "Passed template argument is not Integral");
1437     return 0;
1438   }
1439 
1440   return TA.getAsIntegral().getSExtValue();
1441 }
1442 
1443 unsigned long long clang_Cursor_getTemplateArgumentUnsignedValue(CXCursor C,
1444                                                                  unsigned I) {
1445   TemplateArgument TA;
1446   if (clang_Cursor_getTemplateArgument(C, I, &TA) !=
1447       CXGetTemplateArgumentStatus_Success) {
1448     assert(0 && "Unable to retrieve TemplateArgument");
1449     return 0;
1450   }
1451 
1452   if (TA.getKind() != TemplateArgument::Integral) {
1453     assert(0 && "Passed template argument is not Integral");
1454     return 0;
1455   }
1456 
1457   return TA.getAsIntegral().getZExtValue();
1458 }
1459 
1460 //===----------------------------------------------------------------------===//
1461 // CXCursorSet.
1462 //===----------------------------------------------------------------------===//
1463 
1464 typedef llvm::DenseMap<CXCursor, unsigned> CXCursorSet_Impl;
1465 
1466 static inline CXCursorSet packCXCursorSet(CXCursorSet_Impl *setImpl) {
1467   return (CXCursorSet)setImpl;
1468 }
1469 static inline CXCursorSet_Impl *unpackCXCursorSet(CXCursorSet set) {
1470   return (CXCursorSet_Impl *)set;
1471 }
1472 namespace llvm {
1473 template <> struct DenseMapInfo<CXCursor> {
1474 public:
1475   static inline CXCursor getEmptyKey() {
1476     return MakeCXCursorInvalid(CXCursor_InvalidFile);
1477   }
1478   static inline CXCursor getTombstoneKey() {
1479     return MakeCXCursorInvalid(CXCursor_NoDeclFound);
1480   }
1481   static inline unsigned getHashValue(const CXCursor &cursor) {
1482     return llvm::DenseMapInfo<std::pair<const void *, const void *>>::
1483         getHashValue(std::make_pair(cursor.data[0], cursor.data[1]));
1484   }
1485   static inline bool isEqual(const CXCursor &x, const CXCursor &y) {
1486     return x.kind == y.kind && x.data[0] == y.data[0] && x.data[1] == y.data[1];
1487   }
1488 };
1489 } // namespace llvm
1490 
1491 CXCursorSet clang_createCXCursorSet() {
1492   return packCXCursorSet(new CXCursorSet_Impl());
1493 }
1494 
1495 void clang_disposeCXCursorSet(CXCursorSet set) {
1496   delete unpackCXCursorSet(set);
1497 }
1498 
1499 unsigned clang_CXCursorSet_contains(CXCursorSet set, CXCursor cursor) {
1500   CXCursorSet_Impl *setImpl = unpackCXCursorSet(set);
1501   if (!setImpl)
1502     return 0;
1503   return setImpl->find(cursor) != setImpl->end();
1504 }
1505 
1506 unsigned clang_CXCursorSet_insert(CXCursorSet set, CXCursor cursor) {
1507   // Do not insert invalid cursors into the set.
1508   if (cursor.kind >= CXCursor_FirstInvalid &&
1509       cursor.kind <= CXCursor_LastInvalid)
1510     return 1;
1511 
1512   CXCursorSet_Impl *setImpl = unpackCXCursorSet(set);
1513   if (!setImpl)
1514     return 1;
1515   unsigned &entry = (*setImpl)[cursor];
1516   unsigned flag = entry == 0 ? 1 : 0;
1517   entry = 1;
1518   return flag;
1519 }
1520 
1521 CXCompletionString clang_getCursorCompletionString(CXCursor cursor) {
1522   enum CXCursorKind kind = clang_getCursorKind(cursor);
1523   if (clang_isDeclaration(kind)) {
1524     const Decl *decl = getCursorDecl(cursor);
1525     if (const NamedDecl *namedDecl = dyn_cast_or_null<NamedDecl>(decl)) {
1526       ASTUnit *unit = getCursorASTUnit(cursor);
1527       CodeCompletionResult Result(namedDecl, CCP_Declaration);
1528       CodeCompletionString *String = Result.CreateCodeCompletionString(
1529           unit->getASTContext(), unit->getPreprocessor(),
1530           CodeCompletionContext::CCC_Other,
1531           unit->getCodeCompletionTUInfo().getAllocator(),
1532           unit->getCodeCompletionTUInfo(), true);
1533       return String;
1534     }
1535   } else if (kind == CXCursor_MacroDefinition) {
1536     const MacroDefinitionRecord *definition = getCursorMacroDefinition(cursor);
1537     const IdentifierInfo *Macro = definition->getName();
1538     ASTUnit *unit = getCursorASTUnit(cursor);
1539     CodeCompletionResult Result(
1540         Macro,
1541         unit->getPreprocessor().getMacroDefinition(Macro).getMacroInfo());
1542     CodeCompletionString *String = Result.CreateCodeCompletionString(
1543         unit->getASTContext(), unit->getPreprocessor(),
1544         CodeCompletionContext::CCC_Other,
1545         unit->getCodeCompletionTUInfo().getAllocator(),
1546         unit->getCodeCompletionTUInfo(), false);
1547     return String;
1548   }
1549   return nullptr;
1550 }
1551 
1552 namespace {
1553 struct OverridenCursorsPool {
1554   typedef SmallVector<CXCursor, 2> CursorVec;
1555   std::vector<CursorVec *> AllCursors;
1556   std::vector<CursorVec *> AvailableCursors;
1557 
1558   ~OverridenCursorsPool() {
1559     for (std::vector<CursorVec *>::iterator I = AllCursors.begin(),
1560                                             E = AllCursors.end();
1561          I != E; ++I) {
1562       delete *I;
1563     }
1564   }
1565 };
1566 } // namespace
1567 
1568 void *cxcursor::createOverridenCXCursorsPool() {
1569   return new OverridenCursorsPool();
1570 }
1571 
1572 void cxcursor::disposeOverridenCXCursorsPool(void *pool) {
1573   delete static_cast<OverridenCursorsPool *>(pool);
1574 }
1575 
1576 void clang_getOverriddenCursors(CXCursor cursor, CXCursor **overridden,
1577                                 unsigned *num_overridden) {
1578   if (overridden)
1579     *overridden = nullptr;
1580   if (num_overridden)
1581     *num_overridden = 0;
1582 
1583   CXTranslationUnit TU = cxcursor::getCursorTU(cursor);
1584 
1585   if (!overridden || !num_overridden || !TU)
1586     return;
1587 
1588   if (!clang_isDeclaration(cursor.kind))
1589     return;
1590 
1591   OverridenCursorsPool &pool =
1592       *static_cast<OverridenCursorsPool *>(TU->OverridenCursorsPool);
1593 
1594   OverridenCursorsPool::CursorVec *Vec = nullptr;
1595 
1596   if (!pool.AvailableCursors.empty()) {
1597     Vec = pool.AvailableCursors.back();
1598     pool.AvailableCursors.pop_back();
1599   } else {
1600     Vec = new OverridenCursorsPool::CursorVec();
1601     pool.AllCursors.push_back(Vec);
1602   }
1603 
1604   // Clear out the vector, but don't free the memory contents.  This
1605   // reduces malloc() traffic.
1606   Vec->clear();
1607 
1608   // Use the first entry to contain a back reference to the vector.
1609   // This is a complete hack.
1610   CXCursor backRefCursor = MakeCXCursorInvalid(CXCursor_InvalidFile, TU);
1611   backRefCursor.data[0] = Vec;
1612   assert(cxcursor::getCursorTU(backRefCursor) == TU);
1613   Vec->push_back(backRefCursor);
1614 
1615   // Get the overridden cursors.
1616   cxcursor::getOverriddenCursors(cursor, *Vec);
1617 
1618   // Did we get any overridden cursors?  If not, return Vec to the pool
1619   // of available cursor vectors.
1620   if (Vec->size() == 1) {
1621     pool.AvailableCursors.push_back(Vec);
1622     return;
1623   }
1624 
1625   // Now tell the caller about the overridden cursors.
1626   assert(Vec->size() > 1);
1627   *overridden = &((*Vec)[1]);
1628   *num_overridden = Vec->size() - 1;
1629 }
1630 
1631 void clang_disposeOverriddenCursors(CXCursor *overridden) {
1632   if (!overridden)
1633     return;
1634 
1635   // Use pointer arithmetic to get back the first faux entry
1636   // which has a back-reference to the TU and the vector.
1637   --overridden;
1638   OverridenCursorsPool::CursorVec *Vec =
1639       static_cast<OverridenCursorsPool::CursorVec *>(
1640           const_cast<void *>(overridden->data[0]));
1641   CXTranslationUnit TU = getCursorTU(*overridden);
1642 
1643   assert(Vec && TU);
1644 
1645   OverridenCursorsPool &pool =
1646       *static_cast<OverridenCursorsPool *>(TU->OverridenCursorsPool);
1647 
1648   pool.AvailableCursors.push_back(Vec);
1649 }
1650 
1651 int clang_Cursor_isDynamicCall(CXCursor C) {
1652   const Expr *E = nullptr;
1653   if (clang_isExpression(C.kind))
1654     E = getCursorExpr(C);
1655   if (!E)
1656     return 0;
1657 
1658   if (const ObjCMessageExpr *MsgE = dyn_cast<ObjCMessageExpr>(E)) {
1659     if (MsgE->getReceiverKind() != ObjCMessageExpr::Instance)
1660       return false;
1661     if (auto *RecE = dyn_cast<ObjCMessageExpr>(
1662             MsgE->getInstanceReceiver()->IgnoreParenCasts())) {
1663       if (RecE->getMethodFamily() == OMF_alloc)
1664         return false;
1665     }
1666     return true;
1667   }
1668 
1669   if (auto *PropRefE = dyn_cast<ObjCPropertyRefExpr>(E)) {
1670     return !PropRefE->isSuperReceiver();
1671   }
1672 
1673   const MemberExpr *ME = nullptr;
1674   if (isa<MemberExpr>(E))
1675     ME = cast<MemberExpr>(E);
1676   else if (const CallExpr *CE = dyn_cast<CallExpr>(E))
1677     ME = dyn_cast_or_null<MemberExpr>(CE->getCallee());
1678 
1679   if (ME) {
1680     if (const CXXMethodDecl *MD =
1681             dyn_cast_or_null<CXXMethodDecl>(ME->getMemberDecl()))
1682       return MD->isVirtual() &&
1683              ME->performsVirtualDispatch(
1684                  cxcursor::getCursorContext(C).getLangOpts());
1685   }
1686 
1687   return 0;
1688 }
1689 
1690 CXType clang_Cursor_getReceiverType(CXCursor C) {
1691   CXTranslationUnit TU = cxcursor::getCursorTU(C);
1692   const Expr *E = nullptr;
1693   if (clang_isExpression(C.kind))
1694     E = getCursorExpr(C);
1695 
1696   if (const ObjCMessageExpr *MsgE = dyn_cast_or_null<ObjCMessageExpr>(E))
1697     return cxtype::MakeCXType(MsgE->getReceiverType(), TU);
1698 
1699   if (auto *PropRefE = dyn_cast<ObjCPropertyRefExpr>(E)) {
1700     return cxtype::MakeCXType(
1701         PropRefE->getReceiverType(cxcursor::getCursorContext(C)), TU);
1702   }
1703 
1704   const MemberExpr *ME = nullptr;
1705   if (isa<MemberExpr>(E))
1706     ME = cast<MemberExpr>(E);
1707   else if (const CallExpr *CE = dyn_cast<CallExpr>(E))
1708     ME = dyn_cast_or_null<MemberExpr>(CE->getCallee());
1709 
1710   if (ME) {
1711     if (dyn_cast_or_null<CXXMethodDecl>(ME->getMemberDecl())) {
1712       auto receiverTy = ME->getBase()->IgnoreImpCasts()->getType();
1713       return cxtype::MakeCXType(receiverTy, TU);
1714     }
1715   }
1716 
1717   return cxtype::MakeCXType(QualType(), TU);
1718 }
1719