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      1 //===- CIndexHigh.cpp - Higher level API functions ------------------------===//
      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 #include "IndexingContext.h"
     11 #include "CXTranslationUnit.h"
     12 #include "CIndexDiagnostic.h"
     13 
     14 #include "clang/Frontend/ASTUnit.h"
     15 #include "clang/AST/DeclCXX.h"
     16 #include "clang/AST/DeclTemplate.h"
     17 
     18 using namespace clang;
     19 using namespace cxindex;
     20 using namespace cxcursor;
     21 
     22 IndexingContext::ObjCProtocolListInfo::ObjCProtocolListInfo(
     23                                     const ObjCProtocolList &ProtList,
     24                                     IndexingContext &IdxCtx,
     25                                     ScratchAlloc &SA) {
     26   ObjCInterfaceDecl::protocol_loc_iterator LI = ProtList.loc_begin();
     27   for (ObjCInterfaceDecl::protocol_iterator
     28          I = ProtList.begin(), E = ProtList.end(); I != E; ++I, ++LI) {
     29     SourceLocation Loc = *LI;
     30     ObjCProtocolDecl *PD = *I;
     31     ProtEntities.push_back(EntityInfo());
     32     IdxCtx.getEntityInfo(PD, ProtEntities.back(), SA);
     33     CXIdxObjCProtocolRefInfo ProtInfo = { 0,
     34                                 MakeCursorObjCProtocolRef(PD, Loc, IdxCtx.CXTU),
     35                                 IdxCtx.getIndexLoc(Loc) };
     36     ProtInfos.push_back(ProtInfo);
     37 
     38     if (IdxCtx.shouldSuppressRefs())
     39       IdxCtx.markEntityOccurrenceInFile(PD, Loc);
     40   }
     41 
     42   for (unsigned i = 0, e = ProtInfos.size(); i != e; ++i)
     43     ProtInfos[i].protocol = &ProtEntities[i];
     44 
     45   for (unsigned i = 0, e = ProtInfos.size(); i != e; ++i)
     46     Prots.push_back(&ProtInfos[i]);
     47 }
     48 
     49 
     50 IBOutletCollectionInfo::IBOutletCollectionInfo(
     51                                           const IBOutletCollectionInfo &other)
     52   : AttrInfo(CXIdxAttr_IBOutletCollection, other.cursor, other.loc, other.A) {
     53 
     54   IBCollInfo.attrInfo = this;
     55   IBCollInfo.classCursor = other.IBCollInfo.classCursor;
     56   IBCollInfo.classLoc = other.IBCollInfo.classLoc;
     57   if (other.IBCollInfo.objcClass) {
     58     ClassInfo = other.ClassInfo;
     59     IBCollInfo.objcClass = &ClassInfo;
     60   } else
     61     IBCollInfo.objcClass = 0;
     62 }
     63 
     64 AttrListInfo::AttrListInfo(const Decl *D, IndexingContext &IdxCtx)
     65   : SA(IdxCtx), ref_cnt(0) {
     66 
     67   if (!D->hasAttrs())
     68     return;
     69 
     70   for (AttrVec::const_iterator AttrI = D->attr_begin(), AttrE = D->attr_end();
     71          AttrI != AttrE; ++AttrI) {
     72     const Attr *A = *AttrI;
     73     CXCursor C = MakeCXCursor(A, const_cast<Decl *>(D), IdxCtx.CXTU);
     74     CXIdxLoc Loc =  IdxCtx.getIndexLoc(A->getLocation());
     75     switch (C.kind) {
     76     default:
     77       Attrs.push_back(AttrInfo(CXIdxAttr_Unexposed, C, Loc, A));
     78       break;
     79     case CXCursor_IBActionAttr:
     80       Attrs.push_back(AttrInfo(CXIdxAttr_IBAction, C, Loc, A));
     81       break;
     82     case CXCursor_IBOutletAttr:
     83       Attrs.push_back(AttrInfo(CXIdxAttr_IBOutlet, C, Loc, A));
     84       break;
     85     case CXCursor_IBOutletCollectionAttr:
     86       IBCollAttrs.push_back(IBOutletCollectionInfo(C, Loc, A));
     87       break;
     88     }
     89   }
     90 
     91   for (unsigned i = 0, e = IBCollAttrs.size(); i != e; ++i) {
     92     IBOutletCollectionInfo &IBInfo = IBCollAttrs[i];
     93     CXAttrs.push_back(&IBInfo);
     94 
     95     const IBOutletCollectionAttr *
     96       IBAttr = cast<IBOutletCollectionAttr>(IBInfo.A);
     97     IBInfo.IBCollInfo.attrInfo = &IBInfo;
     98     IBInfo.IBCollInfo.classLoc = IdxCtx.getIndexLoc(IBAttr->getInterfaceLoc());
     99     IBInfo.IBCollInfo.objcClass = 0;
    100     IBInfo.IBCollInfo.classCursor = clang_getNullCursor();
    101     QualType Ty = IBAttr->getInterface();
    102     if (const ObjCInterfaceType *InterTy = Ty->getAs<ObjCInterfaceType>()) {
    103       if (const ObjCInterfaceDecl *InterD = InterTy->getInterface()) {
    104         IdxCtx.getEntityInfo(InterD, IBInfo.ClassInfo, SA);
    105         IBInfo.IBCollInfo.objcClass = &IBInfo.ClassInfo;
    106         IBInfo.IBCollInfo.classCursor = MakeCursorObjCClassRef(InterD,
    107                                         IBAttr->getInterfaceLoc(), IdxCtx.CXTU);
    108       }
    109     }
    110   }
    111 
    112   for (unsigned i = 0, e = Attrs.size(); i != e; ++i)
    113     CXAttrs.push_back(&Attrs[i]);
    114 }
    115 
    116 IntrusiveRefCntPtr<AttrListInfo>
    117 AttrListInfo::create(const Decl *D, IndexingContext &IdxCtx) {
    118   ScratchAlloc SA(IdxCtx);
    119   AttrListInfo *attrs = SA.allocate<AttrListInfo>();
    120   return new (attrs) AttrListInfo(D, IdxCtx);
    121 }
    122 
    123 IndexingContext::CXXBasesListInfo::CXXBasesListInfo(const CXXRecordDecl *D,
    124                                    IndexingContext &IdxCtx,
    125                                    ScratchAlloc &SA) {
    126   for (CXXRecordDecl::base_class_const_iterator
    127          I = D->bases_begin(), E = D->bases_end(); I != E; ++I) {
    128     const CXXBaseSpecifier &Base = *I;
    129     BaseEntities.push_back(EntityInfo());
    130     const NamedDecl *BaseD = 0;
    131     QualType T = Base.getType();
    132     SourceLocation Loc = getBaseLoc(Base);
    133 
    134     if (const TypedefType *TDT = T->getAs<TypedefType>()) {
    135       BaseD = TDT->getDecl();
    136     } else if (const TemplateSpecializationType *
    137           TST = T->getAs<TemplateSpecializationType>()) {
    138       BaseD = TST->getTemplateName().getAsTemplateDecl();
    139     } else if (const RecordType *RT = T->getAs<RecordType>()) {
    140       BaseD = RT->getDecl();
    141     }
    142 
    143     if (BaseD)
    144       IdxCtx.getEntityInfo(BaseD, BaseEntities.back(), SA);
    145     CXIdxBaseClassInfo BaseInfo = { 0,
    146                          MakeCursorCXXBaseSpecifier(&Base, IdxCtx.CXTU),
    147                          IdxCtx.getIndexLoc(Loc) };
    148     BaseInfos.push_back(BaseInfo);
    149   }
    150 
    151   for (unsigned i = 0, e = BaseInfos.size(); i != e; ++i) {
    152     if (BaseEntities[i].name && BaseEntities[i].USR)
    153       BaseInfos[i].base = &BaseEntities[i];
    154   }
    155 
    156   for (unsigned i = 0, e = BaseInfos.size(); i != e; ++i)
    157     CXBases.push_back(&BaseInfos[i]);
    158 }
    159 
    160 SourceLocation IndexingContext::CXXBasesListInfo::getBaseLoc(
    161                                            const CXXBaseSpecifier &Base) const {
    162   SourceLocation Loc = Base.getSourceRange().getBegin();
    163   TypeLoc TL;
    164   if (Base.getTypeSourceInfo())
    165     TL = Base.getTypeSourceInfo()->getTypeLoc();
    166   if (TL.isNull())
    167     return Loc;
    168 
    169   if (const QualifiedTypeLoc *QL = dyn_cast<QualifiedTypeLoc>(&TL))
    170     TL = QL->getUnqualifiedLoc();
    171 
    172   if (const ElaboratedTypeLoc *EL = dyn_cast<ElaboratedTypeLoc>(&TL))
    173     return EL->getNamedTypeLoc().getBeginLoc();
    174   if (const DependentNameTypeLoc *DL = dyn_cast<DependentNameTypeLoc>(&TL))
    175     return DL->getNameLoc();
    176   if (const DependentTemplateSpecializationTypeLoc *
    177         DTL = dyn_cast<DependentTemplateSpecializationTypeLoc>(&TL))
    178     return DTL->getTemplateNameLoc();
    179 
    180   return Loc;
    181 }
    182 
    183 const char *ScratchAlloc::toCStr(StringRef Str) {
    184   if (Str.empty())
    185     return "";
    186   if (Str.data()[Str.size()] == '\0')
    187     return Str.data();
    188   return copyCStr(Str);
    189 }
    190 
    191 const char *ScratchAlloc::copyCStr(StringRef Str) {
    192   char *buf = IdxCtx.StrScratch.Allocate<char>(Str.size() + 1);
    193   std::uninitialized_copy(Str.begin(), Str.end(), buf);
    194   buf[Str.size()] = '\0';
    195   return buf;
    196 }
    197 
    198 void IndexingContext::setASTContext(ASTContext &ctx) {
    199   Ctx = &ctx;
    200   static_cast<ASTUnit*>(CXTU->TUData)->setASTContext(&ctx);
    201 }
    202 
    203 void IndexingContext::setPreprocessor(Preprocessor &PP) {
    204   static_cast<ASTUnit*>(CXTU->TUData)->setPreprocessor(&PP);
    205 }
    206 
    207 bool IndexingContext::shouldAbort() {
    208   if (!CB.abortQuery)
    209     return false;
    210   return CB.abortQuery(ClientData, 0);
    211 }
    212 
    213 void IndexingContext::enteredMainFile(const FileEntry *File) {
    214   if (File && CB.enteredMainFile) {
    215     CXIdxClientFile idxFile = CB.enteredMainFile(ClientData, (CXFile)File, 0);
    216     FileMap[File] = idxFile;
    217   }
    218 }
    219 
    220 void IndexingContext::ppIncludedFile(SourceLocation hashLoc,
    221                                      StringRef filename,
    222                                      const FileEntry *File,
    223                                      bool isImport, bool isAngled) {
    224   if (!CB.ppIncludedFile)
    225     return;
    226 
    227   ScratchAlloc SA(*this);
    228   CXIdxIncludedFileInfo Info = { getIndexLoc(hashLoc),
    229                                  SA.toCStr(filename),
    230                                  (CXFile)File,
    231                                  isImport, isAngled };
    232   CXIdxClientFile idxFile = CB.ppIncludedFile(ClientData, &Info);
    233   FileMap[File] = idxFile;
    234 }
    235 
    236 void IndexingContext::startedTranslationUnit() {
    237   CXIdxClientContainer idxCont = 0;
    238   if (CB.startedTranslationUnit)
    239     idxCont = CB.startedTranslationUnit(ClientData, 0);
    240   addContainerInMap(Ctx->getTranslationUnitDecl(), idxCont);
    241 }
    242 
    243 void IndexingContext::handleDiagnosticSet(CXDiagnostic CXDiagSet) {
    244   if (!CB.diagnostic)
    245     return;
    246 
    247   CB.diagnostic(ClientData, CXDiagSet, 0);
    248 }
    249 
    250 bool IndexingContext::handleDecl(const NamedDecl *D,
    251                                  SourceLocation Loc, CXCursor Cursor,
    252                                  DeclInfo &DInfo,
    253                                  const DeclContext *LexicalDC) {
    254   if (!CB.indexDeclaration || !D)
    255     return false;
    256   if (D->isImplicit() && shouldIgnoreIfImplicit(D))
    257     return false;
    258 
    259   ScratchAlloc SA(*this);
    260   getEntityInfo(D, DInfo.EntInfo, SA);
    261   if ((!shouldIndexFunctionLocalSymbols() && !DInfo.EntInfo.USR)
    262       || Loc.isInvalid())
    263     return false;
    264 
    265   if (!LexicalDC)
    266     LexicalDC = D->getLexicalDeclContext();
    267 
    268   if (shouldSuppressRefs())
    269     markEntityOccurrenceInFile(D, Loc);
    270 
    271   DInfo.entityInfo = &DInfo.EntInfo;
    272   DInfo.cursor = Cursor;
    273   DInfo.loc = getIndexLoc(Loc);
    274   DInfo.isImplicit = D->isImplicit();
    275 
    276   DInfo.attributes = DInfo.EntInfo.attributes;
    277   DInfo.numAttributes = DInfo.EntInfo.numAttributes;
    278 
    279   getContainerInfo(D->getDeclContext(), DInfo.SemanticContainer);
    280   DInfo.semanticContainer = &DInfo.SemanticContainer;
    281 
    282   if (LexicalDC == D->getDeclContext()) {
    283     DInfo.lexicalContainer = &DInfo.SemanticContainer;
    284   } else if (isTemplateImplicitInstantiation(D)) {
    285     // Implicit instantiations have the lexical context of where they were
    286     // instantiated first. We choose instead the semantic context because:
    287     // 1) at the time that we see the instantiation we have not seen the
    288     //   function where it occurred yet.
    289     // 2) the lexical context of the first instantiation is not useful
    290     //   information anyway.
    291     DInfo.lexicalContainer = &DInfo.SemanticContainer;
    292   } else {
    293     getContainerInfo(LexicalDC, DInfo.LexicalContainer);
    294     DInfo.lexicalContainer = &DInfo.LexicalContainer;
    295   }
    296 
    297   if (DInfo.isContainer) {
    298     getContainerInfo(getEntityContainer(D), DInfo.DeclAsContainer);
    299     DInfo.declAsContainer = &DInfo.DeclAsContainer;
    300   }
    301 
    302   CB.indexDeclaration(ClientData, &DInfo);
    303   return true;
    304 }
    305 
    306 bool IndexingContext::handleObjCContainer(const ObjCContainerDecl *D,
    307                                           SourceLocation Loc, CXCursor Cursor,
    308                                           ObjCContainerDeclInfo &ContDInfo) {
    309   ContDInfo.ObjCContDeclInfo.declInfo = &ContDInfo;
    310   return handleDecl(D, Loc, Cursor, ContDInfo);
    311 }
    312 
    313 bool IndexingContext::handleFunction(const FunctionDecl *D) {
    314   DeclInfo DInfo(!D->isFirstDeclaration(), D->isThisDeclarationADefinition(),
    315                  D->isThisDeclarationADefinition());
    316   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
    317 }
    318 
    319 bool IndexingContext::handleVar(const VarDecl *D) {
    320   DeclInfo DInfo(!D->isFirstDeclaration(), D->isThisDeclarationADefinition(),
    321                  /*isContainer=*/false);
    322   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
    323 }
    324 
    325 bool IndexingContext::handleField(const FieldDecl *D) {
    326   DeclInfo DInfo(/*isRedeclaration=*/false, /*isDefinition=*/true,
    327                  /*isContainer=*/false);
    328   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
    329 }
    330 
    331 bool IndexingContext::handleEnumerator(const EnumConstantDecl *D) {
    332   DeclInfo DInfo(/*isRedeclaration=*/false, /*isDefinition=*/true,
    333                  /*isContainer=*/false);
    334   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
    335 }
    336 
    337 bool IndexingContext::handleTagDecl(const TagDecl *D) {
    338   if (const CXXRecordDecl *CXXRD = dyn_cast<CXXRecordDecl>(D))
    339     return handleCXXRecordDecl(CXXRD, D);
    340 
    341   DeclInfo DInfo(!D->isFirstDeclaration(), D->isThisDeclarationADefinition(),
    342                  D->isThisDeclarationADefinition());
    343   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
    344 }
    345 
    346 bool IndexingContext::handleTypedefName(const TypedefNameDecl *D) {
    347   DeclInfo DInfo(!D->isFirstDeclaration(), /*isDefinition=*/true,
    348                  /*isContainer=*/false);
    349   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
    350 }
    351 
    352 bool IndexingContext::handleObjCInterface(const ObjCInterfaceDecl *D) {
    353   // For @class forward declarations, suppress them the same way as references.
    354   if (!D->isThisDeclarationADefinition()) {
    355     if (shouldSuppressRefs() && markEntityOccurrenceInFile(D, D->getLocation()))
    356       return false; // already occurred.
    357 
    358     // FIXME: This seems like the wrong definition for redeclaration.
    359     bool isRedeclaration = D->hasDefinition() || D->getPreviousDecl();
    360     ObjCContainerDeclInfo ContDInfo(/*isForwardRef=*/true, isRedeclaration,
    361                                     /*isImplementation=*/false);
    362     return handleObjCContainer(D, D->getLocation(),
    363                                MakeCursorObjCClassRef(D, D->getLocation(),
    364                                                       CXTU),
    365                                ContDInfo);
    366   }
    367 
    368   ScratchAlloc SA(*this);
    369 
    370   CXIdxBaseClassInfo BaseClass;
    371   EntityInfo BaseEntity;
    372   BaseClass.cursor = clang_getNullCursor();
    373   if (ObjCInterfaceDecl *SuperD = D->getSuperClass()) {
    374     getEntityInfo(SuperD, BaseEntity, SA);
    375     SourceLocation SuperLoc = D->getSuperClassLoc();
    376     BaseClass.base = &BaseEntity;
    377     BaseClass.cursor = MakeCursorObjCSuperClassRef(SuperD, SuperLoc, CXTU);
    378     BaseClass.loc = getIndexLoc(SuperLoc);
    379 
    380     if (shouldSuppressRefs())
    381       markEntityOccurrenceInFile(SuperD, SuperLoc);
    382   }
    383 
    384   ObjCProtocolList EmptyProtoList;
    385   ObjCProtocolListInfo ProtInfo(D->isThisDeclarationADefinition()
    386                                   ? D->getReferencedProtocols()
    387                                   : EmptyProtoList,
    388                                 *this, SA);
    389 
    390   ObjCInterfaceDeclInfo InterInfo(D);
    391   InterInfo.ObjCProtoListInfo = ProtInfo.getListInfo();
    392   InterInfo.ObjCInterDeclInfo.containerInfo = &InterInfo.ObjCContDeclInfo;
    393   InterInfo.ObjCInterDeclInfo.superInfo = D->getSuperClass() ? &BaseClass : 0;
    394   InterInfo.ObjCInterDeclInfo.protocols = &InterInfo.ObjCProtoListInfo;
    395 
    396   return handleObjCContainer(D, D->getLocation(), getCursor(D), InterInfo);
    397 }
    398 
    399 bool IndexingContext::handleObjCImplementation(
    400                                               const ObjCImplementationDecl *D) {
    401   ObjCContainerDeclInfo ContDInfo(/*isForwardRef=*/false,
    402                       /*isRedeclaration=*/true,
    403                       /*isImplementation=*/true);
    404   return handleObjCContainer(D, D->getLocation(), getCursor(D), ContDInfo);
    405 }
    406 
    407 bool IndexingContext::handleObjCProtocol(const ObjCProtocolDecl *D) {
    408   if (!D->isThisDeclarationADefinition()) {
    409     if (shouldSuppressRefs() && markEntityOccurrenceInFile(D, D->getLocation()))
    410       return false; // already occurred.
    411 
    412     // FIXME: This seems like the wrong definition for redeclaration.
    413     bool isRedeclaration = D->hasDefinition() || D->getPreviousDecl();
    414     ObjCContainerDeclInfo ContDInfo(/*isForwardRef=*/true,
    415                                     isRedeclaration,
    416                                     /*isImplementation=*/false);
    417     return handleObjCContainer(D, D->getLocation(),
    418                                MakeCursorObjCProtocolRef(D, D->getLocation(),
    419                                                          CXTU),
    420                                ContDInfo);
    421   }
    422 
    423   ScratchAlloc SA(*this);
    424   ObjCProtocolList EmptyProtoList;
    425   ObjCProtocolListInfo ProtListInfo(D->isThisDeclarationADefinition()
    426                                       ? D->getReferencedProtocols()
    427                                       : EmptyProtoList,
    428                                     *this, SA);
    429 
    430   ObjCProtocolDeclInfo ProtInfo(D);
    431   ProtInfo.ObjCProtoRefListInfo = ProtListInfo.getListInfo();
    432 
    433   return handleObjCContainer(D, D->getLocation(), getCursor(D), ProtInfo);
    434 }
    435 
    436 bool IndexingContext::handleObjCCategory(const ObjCCategoryDecl *D) {
    437   ScratchAlloc SA(*this);
    438 
    439   ObjCCategoryDeclInfo CatDInfo(/*isImplementation=*/false);
    440   EntityInfo ClassEntity;
    441   const ObjCInterfaceDecl *IFaceD = D->getClassInterface();
    442   SourceLocation ClassLoc = D->getLocation();
    443   SourceLocation CategoryLoc = D->IsClassExtension() ? ClassLoc
    444                                                      : D->getCategoryNameLoc();
    445   getEntityInfo(IFaceD, ClassEntity, SA);
    446 
    447   if (shouldSuppressRefs())
    448     markEntityOccurrenceInFile(IFaceD, ClassLoc);
    449 
    450   ObjCProtocolListInfo ProtInfo(D->getReferencedProtocols(), *this, SA);
    451 
    452   CatDInfo.ObjCCatDeclInfo.containerInfo = &CatDInfo.ObjCContDeclInfo;
    453   if (IFaceD) {
    454     CatDInfo.ObjCCatDeclInfo.objcClass = &ClassEntity;
    455     CatDInfo.ObjCCatDeclInfo.classCursor =
    456         MakeCursorObjCClassRef(IFaceD, ClassLoc, CXTU);
    457   } else {
    458     CatDInfo.ObjCCatDeclInfo.objcClass = 0;
    459     CatDInfo.ObjCCatDeclInfo.classCursor = clang_getNullCursor();
    460   }
    461   CatDInfo.ObjCCatDeclInfo.classLoc = getIndexLoc(ClassLoc);
    462   CatDInfo.ObjCProtoListInfo = ProtInfo.getListInfo();
    463   CatDInfo.ObjCCatDeclInfo.protocols = &CatDInfo.ObjCProtoListInfo;
    464 
    465   return handleObjCContainer(D, CategoryLoc, getCursor(D), CatDInfo);
    466 }
    467 
    468 bool IndexingContext::handleObjCCategoryImpl(const ObjCCategoryImplDecl *D) {
    469   ScratchAlloc SA(*this);
    470 
    471   const ObjCCategoryDecl *CatD = D->getCategoryDecl();
    472   ObjCCategoryDeclInfo CatDInfo(/*isImplementation=*/true);
    473   EntityInfo ClassEntity;
    474   const ObjCInterfaceDecl *IFaceD = CatD->getClassInterface();
    475   SourceLocation ClassLoc = D->getLocation();
    476   SourceLocation CategoryLoc = D->getCategoryNameLoc();
    477   getEntityInfo(IFaceD, ClassEntity, SA);
    478 
    479   if (shouldSuppressRefs())
    480     markEntityOccurrenceInFile(IFaceD, ClassLoc);
    481 
    482   CatDInfo.ObjCCatDeclInfo.containerInfo = &CatDInfo.ObjCContDeclInfo;
    483   if (IFaceD) {
    484     CatDInfo.ObjCCatDeclInfo.objcClass = &ClassEntity;
    485     CatDInfo.ObjCCatDeclInfo.classCursor =
    486         MakeCursorObjCClassRef(IFaceD, ClassLoc, CXTU);
    487   } else {
    488     CatDInfo.ObjCCatDeclInfo.objcClass = 0;
    489     CatDInfo.ObjCCatDeclInfo.classCursor = clang_getNullCursor();
    490   }
    491   CatDInfo.ObjCCatDeclInfo.classLoc = getIndexLoc(ClassLoc);
    492   CatDInfo.ObjCCatDeclInfo.protocols = 0;
    493 
    494   return handleObjCContainer(D, CategoryLoc, getCursor(D), CatDInfo);
    495 }
    496 
    497 bool IndexingContext::handleObjCMethod(const ObjCMethodDecl *D) {
    498   DeclInfo DInfo(!D->isCanonicalDecl(), D->isThisDeclarationADefinition(),
    499                  D->isThisDeclarationADefinition());
    500   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
    501 }
    502 
    503 bool IndexingContext::handleSynthesizedObjCProperty(
    504                                                 const ObjCPropertyImplDecl *D) {
    505   ObjCPropertyDecl *PD = D->getPropertyDecl();
    506   return handleReference(PD, D->getLocation(), getCursor(D), 0, D->getDeclContext());
    507 }
    508 
    509 bool IndexingContext::handleSynthesizedObjCMethod(const ObjCMethodDecl *D,
    510                                                   SourceLocation Loc,
    511                                                  const DeclContext *LexicalDC) {
    512   DeclInfo DInfo(/*isRedeclaration=*/true, /*isDefinition=*/true,
    513                  /*isContainer=*/false);
    514   return handleDecl(D, Loc, getCursor(D), DInfo, LexicalDC);
    515 }
    516 
    517 bool IndexingContext::handleObjCProperty(const ObjCPropertyDecl *D) {
    518   ScratchAlloc SA(*this);
    519 
    520   ObjCPropertyDeclInfo DInfo;
    521   EntityInfo GetterEntity;
    522   EntityInfo SetterEntity;
    523 
    524   DInfo.ObjCPropDeclInfo.declInfo = &DInfo;
    525 
    526   if (ObjCMethodDecl *Getter = D->getGetterMethodDecl()) {
    527     getEntityInfo(Getter, GetterEntity, SA);
    528     DInfo.ObjCPropDeclInfo.getter = &GetterEntity;
    529   } else {
    530     DInfo.ObjCPropDeclInfo.getter = 0;
    531   }
    532   if (ObjCMethodDecl *Setter = D->getSetterMethodDecl()) {
    533     getEntityInfo(Setter, SetterEntity, SA);
    534     DInfo.ObjCPropDeclInfo.setter = &SetterEntity;
    535   } else {
    536     DInfo.ObjCPropDeclInfo.setter = 0;
    537   }
    538 
    539   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
    540 }
    541 
    542 bool IndexingContext::handleNamespace(const NamespaceDecl *D) {
    543   DeclInfo DInfo(/*isRedeclaration=*/!D->isOriginalNamespace(),
    544                  /*isDefinition=*/true,
    545                  /*isContainer=*/true);
    546   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
    547 }
    548 
    549 bool IndexingContext::handleClassTemplate(const ClassTemplateDecl *D) {
    550   return handleCXXRecordDecl(D->getTemplatedDecl(), D);
    551 }
    552 
    553 bool IndexingContext::handleFunctionTemplate(const FunctionTemplateDecl *D) {
    554   DeclInfo DInfo(/*isRedeclaration=*/!D->isCanonicalDecl(),
    555                  /*isDefinition=*/D->isThisDeclarationADefinition(),
    556                  /*isContainer=*/D->isThisDeclarationADefinition());
    557   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
    558 }
    559 
    560 bool IndexingContext::handleTypeAliasTemplate(const TypeAliasTemplateDecl *D) {
    561   DeclInfo DInfo(/*isRedeclaration=*/!D->isCanonicalDecl(),
    562                  /*isDefinition=*/true, /*isContainer=*/false);
    563   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
    564 }
    565 
    566 bool IndexingContext::handleReference(const NamedDecl *D, SourceLocation Loc,
    567                                       const NamedDecl *Parent,
    568                                       const DeclContext *DC,
    569                                       const Expr *E,
    570                                       CXIdxEntityRefKind Kind) {
    571   if (!D)
    572     return false;
    573 
    574   CXCursor Cursor = E ? MakeCXCursor(const_cast<Expr*>(E),
    575                                      const_cast<Decl*>(cast<Decl>(DC)), CXTU)
    576                       : getRefCursor(D, Loc);
    577   return handleReference(D, Loc, Cursor, Parent, DC, E, Kind);
    578 }
    579 
    580 bool IndexingContext::handleReference(const NamedDecl *D, SourceLocation Loc,
    581                                       CXCursor Cursor,
    582                                       const NamedDecl *Parent,
    583                                       const DeclContext *DC,
    584                                       const Expr *E,
    585                                       CXIdxEntityRefKind Kind) {
    586   if (!CB.indexEntityReference)
    587     return false;
    588 
    589   if (!D)
    590     return false;
    591   if (Loc.isInvalid())
    592     return false;
    593   if (!shouldIndexFunctionLocalSymbols() && D->getParentFunctionOrMethod())
    594     return false;
    595   if (isNotFromSourceFile(D->getLocation()))
    596     return false;
    597   if (D->isImplicit() && shouldIgnoreIfImplicit(D))
    598     return false;
    599 
    600   if (shouldSuppressRefs()) {
    601     if (markEntityOccurrenceInFile(D, Loc))
    602       return false; // already occurred.
    603   }
    604 
    605   ScratchAlloc SA(*this);
    606   EntityInfo RefEntity, ParentEntity;
    607   getEntityInfo(D, RefEntity, SA);
    608   if (!RefEntity.USR)
    609     return false;
    610 
    611   getEntityInfo(Parent, ParentEntity, SA);
    612 
    613   ContainerInfo Container;
    614   getContainerInfo(DC, Container);
    615 
    616   CXIdxEntityRefInfo Info = { Kind,
    617                               Cursor,
    618                               getIndexLoc(Loc),
    619                               &RefEntity,
    620                               Parent ? &ParentEntity : 0,
    621                               &Container };
    622   CB.indexEntityReference(ClientData, &Info);
    623   return true;
    624 }
    625 
    626 bool IndexingContext::isNotFromSourceFile(SourceLocation Loc) const {
    627   if (Loc.isInvalid())
    628     return true;
    629   SourceManager &SM = Ctx->getSourceManager();
    630   SourceLocation FileLoc = SM.getFileLoc(Loc);
    631   FileID FID = SM.getFileID(FileLoc);
    632   return SM.getFileEntryForID(FID) == 0;
    633 }
    634 
    635 void IndexingContext::addContainerInMap(const DeclContext *DC,
    636                                         CXIdxClientContainer container) {
    637   if (!DC)
    638     return;
    639 
    640   ContainerMapTy::iterator I = ContainerMap.find(DC);
    641   if (I == ContainerMap.end()) {
    642     if (container)
    643       ContainerMap[DC] = container;
    644     return;
    645   }
    646   // Allow changing the container of a previously seen DeclContext so we
    647   // can handle invalid user code, like a function re-definition.
    648   if (container)
    649     I->second = container;
    650   else
    651     ContainerMap.erase(I);
    652 }
    653 
    654 CXIdxClientEntity IndexingContext::getClientEntity(const Decl *D) const {
    655   if (!D)
    656     return 0;
    657   EntityMapTy::const_iterator I = EntityMap.find(D);
    658   if (I == EntityMap.end())
    659     return 0;
    660   return I->second;
    661 }
    662 
    663 void IndexingContext::setClientEntity(const Decl *D, CXIdxClientEntity client) {
    664   if (!D)
    665     return;
    666   EntityMap[D] = client;
    667 }
    668 
    669 bool IndexingContext::handleCXXRecordDecl(const CXXRecordDecl *RD,
    670                                           const NamedDecl *OrigD) {
    671   if (RD->isThisDeclarationADefinition()) {
    672     ScratchAlloc SA(*this);
    673     CXXClassDeclInfo CXXDInfo(/*isRedeclaration=*/!OrigD->isCanonicalDecl(),
    674                            /*isDefinition=*/RD->isThisDeclarationADefinition());
    675     CXXBasesListInfo BaseList(RD, *this, SA);
    676     CXXDInfo.CXXClassInfo.declInfo = &CXXDInfo;
    677     CXXDInfo.CXXClassInfo.bases = BaseList.getBases();
    678     CXXDInfo.CXXClassInfo.numBases = BaseList.getNumBases();
    679 
    680     if (shouldSuppressRefs()) {
    681       // Go through bases and mark them as referenced.
    682       for (unsigned i = 0, e = BaseList.getNumBases(); i != e; ++i) {
    683         const CXIdxBaseClassInfo *baseInfo = BaseList.getBases()[i];
    684         if (baseInfo->base) {
    685           const NamedDecl *BaseD = BaseList.BaseEntities[i].Dcl;
    686           SourceLocation
    687             Loc = SourceLocation::getFromRawEncoding(baseInfo->loc.int_data);
    688           markEntityOccurrenceInFile(BaseD, Loc);
    689         }
    690       }
    691     }
    692 
    693     return handleDecl(OrigD, OrigD->getLocation(), getCursor(OrigD), CXXDInfo);
    694   }
    695 
    696   DeclInfo DInfo(/*isRedeclaration=*/!OrigD->isCanonicalDecl(),
    697                  /*isDefinition=*/RD->isThisDeclarationADefinition(),
    698                  /*isContainer=*/RD->isThisDeclarationADefinition());
    699   return handleDecl(OrigD, OrigD->getLocation(), getCursor(OrigD), DInfo);
    700 }
    701 
    702 bool IndexingContext::markEntityOccurrenceInFile(const NamedDecl *D,
    703                                                  SourceLocation Loc) {
    704   if (!D || Loc.isInvalid())
    705     return true;
    706 
    707   SourceManager &SM = Ctx->getSourceManager();
    708   D = getEntityDecl(D);
    709 
    710   std::pair<FileID, unsigned> LocInfo = SM.getDecomposedLoc(SM.getFileLoc(Loc));
    711   FileID FID = LocInfo.first;
    712   if (FID.isInvalid())
    713     return true;
    714 
    715   const FileEntry *FE = SM.getFileEntryForID(FID);
    716   if (!FE)
    717     return true;
    718   RefFileOccurence RefOccur(FE, D);
    719   std::pair<llvm::DenseSet<RefFileOccurence>::iterator, bool>
    720   res = RefFileOccurences.insert(RefOccur);
    721   if (!res.second)
    722     return true; // already in map.
    723 
    724   return false;
    725 }
    726 
    727 const NamedDecl *IndexingContext::getEntityDecl(const NamedDecl *D) const {
    728   assert(D);
    729   D = cast<NamedDecl>(D->getCanonicalDecl());
    730 
    731   if (const ObjCImplementationDecl *
    732                ImplD = dyn_cast<ObjCImplementationDecl>(D)) {
    733     return getEntityDecl(ImplD->getClassInterface());
    734 
    735   } else if (const ObjCCategoryImplDecl *
    736                CatImplD = dyn_cast<ObjCCategoryImplDecl>(D)) {
    737     return getEntityDecl(CatImplD->getCategoryDecl());
    738   } else if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
    739     if (FunctionTemplateDecl *TemplD = FD->getDescribedFunctionTemplate())
    740       return getEntityDecl(TemplD);
    741   } else if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(D)) {
    742     if (ClassTemplateDecl *TemplD = RD->getDescribedClassTemplate())
    743       return getEntityDecl(TemplD);
    744   }
    745 
    746   return D;
    747 }
    748 
    749 const DeclContext *
    750 IndexingContext::getEntityContainer(const Decl *D) const {
    751   const DeclContext *DC = dyn_cast<DeclContext>(D);
    752   if (DC)
    753     return DC;
    754 
    755   if (const ClassTemplateDecl *ClassTempl = dyn_cast<ClassTemplateDecl>(D)) {
    756     DC = ClassTempl->getTemplatedDecl();
    757   } if (const FunctionTemplateDecl *
    758           FuncTempl = dyn_cast<FunctionTemplateDecl>(D)) {
    759     DC = FuncTempl->getTemplatedDecl();
    760   }
    761 
    762   return DC;
    763 }
    764 
    765 CXIdxClientContainer
    766 IndexingContext::getClientContainerForDC(const DeclContext *DC) const {
    767   if (!DC)
    768     return 0;
    769 
    770   ContainerMapTy::const_iterator I = ContainerMap.find(DC);
    771   if (I == ContainerMap.end())
    772     return 0;
    773 
    774   return I->second;
    775 }
    776 
    777 CXIdxClientFile IndexingContext::getIndexFile(const FileEntry *File) {
    778   if (!File)
    779     return 0;
    780 
    781   FileMapTy::iterator FI = FileMap.find(File);
    782   if (FI != FileMap.end())
    783     return FI->second;
    784 
    785   return 0;
    786 }
    787 
    788 CXIdxLoc IndexingContext::getIndexLoc(SourceLocation Loc) const {
    789   CXIdxLoc idxLoc =  { {0, 0}, 0 };
    790   if (Loc.isInvalid())
    791     return idxLoc;
    792 
    793   idxLoc.ptr_data[0] = (void*)this;
    794   idxLoc.int_data = Loc.getRawEncoding();
    795   return idxLoc;
    796 }
    797 
    798 void IndexingContext::translateLoc(SourceLocation Loc,
    799                                    CXIdxClientFile *indexFile, CXFile *file,
    800                                    unsigned *line, unsigned *column,
    801                                    unsigned *offset) {
    802   if (Loc.isInvalid())
    803     return;
    804 
    805   SourceManager &SM = Ctx->getSourceManager();
    806   Loc = SM.getFileLoc(Loc);
    807 
    808   std::pair<FileID, unsigned> LocInfo = SM.getDecomposedLoc(Loc);
    809   FileID FID = LocInfo.first;
    810   unsigned FileOffset = LocInfo.second;
    811 
    812   if (FID.isInvalid())
    813     return;
    814 
    815   const FileEntry *FE = SM.getFileEntryForID(FID);
    816   if (indexFile)
    817     *indexFile = getIndexFile(FE);
    818   if (file)
    819     *file = (void *)FE;
    820   if (line)
    821     *line = SM.getLineNumber(FID, FileOffset);
    822   if (column)
    823     *column = SM.getColumnNumber(FID, FileOffset);
    824   if (offset)
    825     *offset = FileOffset;
    826 }
    827 
    828 void IndexingContext::getEntityInfo(const NamedDecl *D,
    829                                     EntityInfo &EntityInfo,
    830                                     ScratchAlloc &SA) {
    831   if (!D)
    832     return;
    833 
    834   D = getEntityDecl(D);
    835   EntityInfo.cursor = getCursor(D);
    836   EntityInfo.Dcl = D;
    837   EntityInfo.IndexCtx = this;
    838   EntityInfo.kind = CXIdxEntity_Unexposed;
    839   EntityInfo.templateKind = CXIdxEntity_NonTemplate;
    840   EntityInfo.lang = CXIdxEntityLang_C;
    841 
    842   if (D->hasAttrs()) {
    843     EntityInfo.AttrList = AttrListInfo::create(D, *this);
    844     EntityInfo.attributes = EntityInfo.AttrList->getAttrs();
    845     EntityInfo.numAttributes = EntityInfo.AttrList->getNumAttrs();
    846   }
    847 
    848   if (const TagDecl *TD = dyn_cast<TagDecl>(D)) {
    849     switch (TD->getTagKind()) {
    850     case TTK_Struct:
    851       EntityInfo.kind = CXIdxEntity_Struct; break;
    852     case TTK_Union:
    853       EntityInfo.kind = CXIdxEntity_Union; break;
    854     case TTK_Class:
    855       EntityInfo.kind = CXIdxEntity_CXXClass;
    856       EntityInfo.lang = CXIdxEntityLang_CXX;
    857       break;
    858     case TTK_Enum:
    859       EntityInfo.kind = CXIdxEntity_Enum; break;
    860     }
    861 
    862     if (const CXXRecordDecl *CXXRec = dyn_cast<CXXRecordDecl>(D))
    863       if (!CXXRec->isCLike())
    864         EntityInfo.lang = CXIdxEntityLang_CXX;
    865 
    866     if (isa<ClassTemplatePartialSpecializationDecl>(D)) {
    867       EntityInfo.templateKind = CXIdxEntity_TemplatePartialSpecialization;
    868     } else if (isa<ClassTemplateSpecializationDecl>(D)) {
    869       EntityInfo.templateKind = CXIdxEntity_TemplateSpecialization;
    870     }
    871 
    872   } else {
    873     switch (D->getKind()) {
    874     case Decl::Typedef:
    875       EntityInfo.kind = CXIdxEntity_Typedef; break;
    876     case Decl::Function:
    877       EntityInfo.kind = CXIdxEntity_Function;
    878       break;
    879     case Decl::ParmVar:
    880       EntityInfo.kind = CXIdxEntity_Variable;
    881       break;
    882     case Decl::Var:
    883       EntityInfo.kind = CXIdxEntity_Variable;
    884       if (isa<CXXRecordDecl>(D->getDeclContext())) {
    885         EntityInfo.kind = CXIdxEntity_CXXStaticVariable;
    886         EntityInfo.lang = CXIdxEntityLang_CXX;
    887       }
    888       break;
    889     case Decl::Field:
    890       EntityInfo.kind = CXIdxEntity_Field;
    891       if (const CXXRecordDecl *
    892             CXXRec = dyn_cast<CXXRecordDecl>(D->getDeclContext())) {
    893         // FIXME: isPOD check is not sufficient, a POD can contain methods,
    894         // we want a isCStructLike check.
    895         if (!CXXRec->isPOD())
    896           EntityInfo.lang = CXIdxEntityLang_CXX;
    897       }
    898       break;
    899     case Decl::EnumConstant:
    900       EntityInfo.kind = CXIdxEntity_EnumConstant; break;
    901     case Decl::ObjCInterface:
    902       EntityInfo.kind = CXIdxEntity_ObjCClass;
    903       EntityInfo.lang = CXIdxEntityLang_ObjC;
    904       break;
    905     case Decl::ObjCProtocol:
    906       EntityInfo.kind = CXIdxEntity_ObjCProtocol;
    907       EntityInfo.lang = CXIdxEntityLang_ObjC;
    908       break;
    909     case Decl::ObjCCategory:
    910       EntityInfo.kind = CXIdxEntity_ObjCCategory;
    911       EntityInfo.lang = CXIdxEntityLang_ObjC;
    912       break;
    913     case Decl::ObjCMethod:
    914       if (cast<ObjCMethodDecl>(D)->isInstanceMethod())
    915         EntityInfo.kind = CXIdxEntity_ObjCInstanceMethod;
    916       else
    917         EntityInfo.kind = CXIdxEntity_ObjCClassMethod;
    918       EntityInfo.lang = CXIdxEntityLang_ObjC;
    919       break;
    920     case Decl::ObjCProperty:
    921       EntityInfo.kind = CXIdxEntity_ObjCProperty;
    922       EntityInfo.lang = CXIdxEntityLang_ObjC;
    923       break;
    924     case Decl::ObjCIvar:
    925       EntityInfo.kind = CXIdxEntity_ObjCIvar;
    926       EntityInfo.lang = CXIdxEntityLang_ObjC;
    927       break;
    928     case Decl::Namespace:
    929       EntityInfo.kind = CXIdxEntity_CXXNamespace;
    930       EntityInfo.lang = CXIdxEntityLang_CXX;
    931       break;
    932     case Decl::NamespaceAlias:
    933       EntityInfo.kind = CXIdxEntity_CXXNamespaceAlias;
    934       EntityInfo.lang = CXIdxEntityLang_CXX;
    935       break;
    936     case Decl::CXXConstructor:
    937       EntityInfo.kind = CXIdxEntity_CXXConstructor;
    938       EntityInfo.lang = CXIdxEntityLang_CXX;
    939       break;
    940     case Decl::CXXDestructor:
    941       EntityInfo.kind = CXIdxEntity_CXXDestructor;
    942       EntityInfo.lang = CXIdxEntityLang_CXX;
    943       break;
    944     case Decl::CXXConversion:
    945       EntityInfo.kind = CXIdxEntity_CXXConversionFunction;
    946       EntityInfo.lang = CXIdxEntityLang_CXX;
    947       break;
    948     case Decl::CXXMethod: {
    949       const CXXMethodDecl *MD = cast<CXXMethodDecl>(D);
    950       if (MD->isStatic())
    951         EntityInfo.kind = CXIdxEntity_CXXStaticMethod;
    952       else
    953         EntityInfo.kind = CXIdxEntity_CXXInstanceMethod;
    954       EntityInfo.lang = CXIdxEntityLang_CXX;
    955       break;
    956     }
    957     case Decl::ClassTemplate:
    958       EntityInfo.kind = CXIdxEntity_CXXClass;
    959       EntityInfo.templateKind = CXIdxEntity_Template;
    960       break;
    961     case Decl::FunctionTemplate:
    962       EntityInfo.kind = CXIdxEntity_Function;
    963       EntityInfo.templateKind = CXIdxEntity_Template;
    964       if (const CXXMethodDecl *MD = dyn_cast_or_null<CXXMethodDecl>(
    965                            cast<FunctionTemplateDecl>(D)->getTemplatedDecl())) {
    966         if (isa<CXXConstructorDecl>(MD))
    967           EntityInfo.kind = CXIdxEntity_CXXConstructor;
    968         else if (isa<CXXDestructorDecl>(MD))
    969           EntityInfo.kind = CXIdxEntity_CXXDestructor;
    970         else if (isa<CXXConversionDecl>(MD))
    971           EntityInfo.kind = CXIdxEntity_CXXConversionFunction;
    972         else {
    973           if (MD->isStatic())
    974             EntityInfo.kind = CXIdxEntity_CXXStaticMethod;
    975           else
    976             EntityInfo.kind = CXIdxEntity_CXXInstanceMethod;
    977         }
    978       }
    979       break;
    980     case Decl::TypeAliasTemplate:
    981       EntityInfo.kind = CXIdxEntity_CXXTypeAlias;
    982       EntityInfo.templateKind = CXIdxEntity_Template;
    983       break;
    984     case Decl::TypeAlias:
    985       EntityInfo.kind = CXIdxEntity_CXXTypeAlias;
    986       EntityInfo.lang = CXIdxEntityLang_CXX;
    987       break;
    988     default:
    989       break;
    990     }
    991   }
    992 
    993   if (EntityInfo.kind == CXIdxEntity_Unexposed)
    994     return;
    995 
    996   if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
    997     if (FD->getTemplatedKind() ==
    998           FunctionDecl::TK_FunctionTemplateSpecialization)
    999       EntityInfo.templateKind = CXIdxEntity_TemplateSpecialization;
   1000   }
   1001 
   1002   if (EntityInfo.templateKind != CXIdxEntity_NonTemplate)
   1003     EntityInfo.lang = CXIdxEntityLang_CXX;
   1004 
   1005   if (IdentifierInfo *II = D->getIdentifier()) {
   1006     EntityInfo.name = SA.toCStr(II->getName());
   1007 
   1008   } else if (isa<TagDecl>(D) || isa<FieldDecl>(D) || isa<NamespaceDecl>(D)) {
   1009     EntityInfo.name = 0; // anonymous tag/field/namespace.
   1010 
   1011   } else {
   1012     SmallString<256> StrBuf;
   1013     {
   1014       llvm::raw_svector_ostream OS(StrBuf);
   1015       D->printName(OS);
   1016     }
   1017     EntityInfo.name = SA.copyCStr(StrBuf.str());
   1018   }
   1019 
   1020   {
   1021     SmallString<512> StrBuf;
   1022     bool Ignore = getDeclCursorUSR(D, StrBuf);
   1023     if (Ignore) {
   1024       EntityInfo.USR = 0;
   1025     } else {
   1026       EntityInfo.USR = SA.copyCStr(StrBuf.str());
   1027     }
   1028   }
   1029 }
   1030 
   1031 void IndexingContext::getContainerInfo(const DeclContext *DC,
   1032                                        ContainerInfo &ContInfo) {
   1033   ContInfo.cursor = getCursor(cast<Decl>(DC));
   1034   ContInfo.DC = DC;
   1035   ContInfo.IndexCtx = this;
   1036 }
   1037 
   1038 CXCursor IndexingContext::getRefCursor(const NamedDecl *D, SourceLocation Loc) {
   1039   if (const TypeDecl *TD = dyn_cast<TypeDecl>(D))
   1040     return MakeCursorTypeRef(TD, Loc, CXTU);
   1041   if (const ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(D))
   1042     return MakeCursorObjCClassRef(ID, Loc, CXTU);
   1043   if (const ObjCProtocolDecl *PD = dyn_cast<ObjCProtocolDecl>(D))
   1044     return MakeCursorObjCProtocolRef(PD, Loc, CXTU);
   1045   if (const TemplateDecl *Template = dyn_cast<TemplateDecl>(D))
   1046     return MakeCursorTemplateRef(Template, Loc, CXTU);
   1047   if (const NamespaceDecl *Namespace = dyn_cast<NamespaceDecl>(D))
   1048     return MakeCursorNamespaceRef(Namespace, Loc, CXTU);
   1049   if (const NamespaceAliasDecl *Namespace = dyn_cast<NamespaceAliasDecl>(D))
   1050     return MakeCursorNamespaceRef(Namespace, Loc, CXTU);
   1051   if (const FieldDecl *Field = dyn_cast<FieldDecl>(D))
   1052     return MakeCursorMemberRef(Field, Loc, CXTU);
   1053   if (const VarDecl *Var = dyn_cast<VarDecl>(D))
   1054     return MakeCursorVariableRef(Var, Loc, CXTU);
   1055 
   1056   return clang_getNullCursor();
   1057 }
   1058 
   1059 bool IndexingContext::shouldIgnoreIfImplicit(const Decl *D) {
   1060   if (isa<ObjCInterfaceDecl>(D))
   1061     return false;
   1062   if (isa<ObjCCategoryDecl>(D))
   1063     return false;
   1064   if (isa<ObjCIvarDecl>(D))
   1065     return false;
   1066   if (isa<ObjCMethodDecl>(D))
   1067     return false;
   1068   return true;
   1069 }
   1070 
   1071 bool IndexingContext::isTemplateImplicitInstantiation(const Decl *D) {
   1072   if (const ClassTemplateSpecializationDecl *
   1073         SD = dyn_cast<ClassTemplateSpecializationDecl>(D)) {
   1074     return SD->getSpecializationKind() == TSK_ImplicitInstantiation;
   1075   }
   1076   if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
   1077     return FD->getTemplateSpecializationKind() == TSK_ImplicitInstantiation;
   1078   }
   1079   return false;
   1080 }
   1081