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