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      1 //===- IndexingContext.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 "CIndexDiagnostic.h"
     12 #include "CXTranslationUnit.h"
     13 #include "clang/AST/DeclCXX.h"
     14 #include "clang/AST/DeclTemplate.h"
     15 #include "clang/Frontend/ASTUnit.h"
     16 
     17 using namespace clang;
     18 using namespace cxindex;
     19 using namespace cxcursor;
     20 
     21 IndexingContext::ObjCProtocolListInfo::ObjCProtocolListInfo(
     22                                     const ObjCProtocolList &ProtList,
     23                                     IndexingContext &IdxCtx,
     24                                     ScratchAlloc &SA) {
     25   ObjCInterfaceDecl::protocol_loc_iterator LI = ProtList.loc_begin();
     26   for (ObjCInterfaceDecl::protocol_iterator
     27          I = ProtList.begin(), E = ProtList.end(); I != E; ++I, ++LI) {
     28     SourceLocation Loc = *LI;
     29     ObjCProtocolDecl *PD = *I;
     30     ProtEntities.push_back(EntityInfo());
     31     IdxCtx.getEntityInfo(PD, ProtEntities.back(), SA);
     32     CXIdxObjCProtocolRefInfo ProtInfo = { 0,
     33                                 MakeCursorObjCProtocolRef(PD, Loc, IdxCtx.CXTU),
     34                                 IdxCtx.getIndexLoc(Loc) };
     35     ProtInfos.push_back(ProtInfo);
     36 
     37     if (IdxCtx.shouldSuppressRefs())
     38       IdxCtx.markEntityOccurrenceInFile(PD, Loc);
     39   }
     40 
     41   for (unsigned i = 0, e = ProtInfos.size(); i != e; ++i)
     42     ProtInfos[i].protocol = &ProtEntities[i];
     43 
     44   for (unsigned i = 0, e = ProtInfos.size(); i != e; ++i)
     45     Prots.push_back(&ProtInfos[i]);
     46 }
     47 
     48 
     49 IBOutletCollectionInfo::IBOutletCollectionInfo(
     50                                           const IBOutletCollectionInfo &other)
     51   : AttrInfo(CXIdxAttr_IBOutletCollection, other.cursor, other.loc, other.A) {
     52 
     53   IBCollInfo.attrInfo = this;
     54   IBCollInfo.classCursor = other.IBCollInfo.classCursor;
     55   IBCollInfo.classLoc = other.IBCollInfo.classLoc;
     56   if (other.IBCollInfo.objcClass) {
     57     ClassInfo = other.ClassInfo;
     58     IBCollInfo.objcClass = &ClassInfo;
     59   } else
     60     IBCollInfo.objcClass = 0;
     61 }
     62 
     63 AttrListInfo::AttrListInfo(const Decl *D, IndexingContext &IdxCtx)
     64   : SA(IdxCtx), ref_cnt(0) {
     65 
     66   if (!D->hasAttrs())
     67     return;
     68 
     69   for (AttrVec::const_iterator AttrI = D->attr_begin(), AttrE = D->attr_end();
     70          AttrI != AttrE; ++AttrI) {
     71     const Attr *A = *AttrI;
     72     CXCursor C = MakeCXCursor(A, D, IdxCtx.CXTU);
     73     CXIdxLoc Loc =  IdxCtx.getIndexLoc(A->getLocation());
     74     switch (C.kind) {
     75     default:
     76       Attrs.push_back(AttrInfo(CXIdxAttr_Unexposed, C, Loc, A));
     77       break;
     78     case CXCursor_IBActionAttr:
     79       Attrs.push_back(AttrInfo(CXIdxAttr_IBAction, C, Loc, A));
     80       break;
     81     case CXCursor_IBOutletAttr:
     82       Attrs.push_back(AttrInfo(CXIdxAttr_IBOutlet, C, Loc, A));
     83       break;
     84     case CXCursor_IBOutletCollectionAttr:
     85       IBCollAttrs.push_back(IBOutletCollectionInfo(C, Loc, A));
     86       break;
     87     }
     88   }
     89 
     90   for (unsigned i = 0, e = IBCollAttrs.size(); i != e; ++i) {
     91     IBOutletCollectionInfo &IBInfo = IBCollAttrs[i];
     92     CXAttrs.push_back(&IBInfo);
     93 
     94     const IBOutletCollectionAttr *
     95       IBAttr = cast<IBOutletCollectionAttr>(IBInfo.A);
     96     IBInfo.IBCollInfo.attrInfo = &IBInfo;
     97     IBInfo.IBCollInfo.classLoc = IdxCtx.getIndexLoc(IBAttr->getInterfaceLoc());
     98     IBInfo.IBCollInfo.objcClass = 0;
     99     IBInfo.IBCollInfo.classCursor = clang_getNullCursor();
    100     QualType Ty = IBAttr->getInterface();
    101     if (const ObjCInterfaceType *InterTy = Ty->getAs<ObjCInterfaceType>()) {
    102       if (const ObjCInterfaceDecl *InterD = InterTy->getInterface()) {
    103         IdxCtx.getEntityInfo(InterD, IBInfo.ClassInfo, SA);
    104         IBInfo.IBCollInfo.objcClass = &IBInfo.ClassInfo;
    105         IBInfo.IBCollInfo.classCursor = MakeCursorObjCClassRef(InterD,
    106                                         IBAttr->getInterfaceLoc(), IdxCtx.CXTU);
    107       }
    108     }
    109   }
    110 
    111   for (unsigned i = 0, e = Attrs.size(); i != e; ++i)
    112     CXAttrs.push_back(&Attrs[i]);
    113 }
    114 
    115 IntrusiveRefCntPtr<AttrListInfo>
    116 AttrListInfo::create(const Decl *D, IndexingContext &IdxCtx) {
    117   ScratchAlloc SA(IdxCtx);
    118   AttrListInfo *attrs = SA.allocate<AttrListInfo>();
    119   return new (attrs) AttrListInfo(D, IdxCtx);
    120 }
    121 
    122 IndexingContext::CXXBasesListInfo::CXXBasesListInfo(const CXXRecordDecl *D,
    123                                    IndexingContext &IdxCtx,
    124                                    ScratchAlloc &SA) {
    125   for (CXXRecordDecl::base_class_const_iterator
    126          I = D->bases_begin(), E = D->bases_end(); I != E; ++I) {
    127     const CXXBaseSpecifier &Base = *I;
    128     BaseEntities.push_back(EntityInfo());
    129     const NamedDecl *BaseD = 0;
    130     QualType T = Base.getType();
    131     SourceLocation Loc = getBaseLoc(Base);
    132 
    133     if (const TypedefType *TDT = T->getAs<TypedefType>()) {
    134       BaseD = TDT->getDecl();
    135     } else if (const TemplateSpecializationType *
    136           TST = T->getAs<TemplateSpecializationType>()) {
    137       BaseD = TST->getTemplateName().getAsTemplateDecl();
    138     } else if (const RecordType *RT = T->getAs<RecordType>()) {
    139       BaseD = RT->getDecl();
    140     }
    141 
    142     if (BaseD)
    143       IdxCtx.getEntityInfo(BaseD, BaseEntities.back(), SA);
    144     CXIdxBaseClassInfo BaseInfo = { 0,
    145                          MakeCursorCXXBaseSpecifier(&Base, IdxCtx.CXTU),
    146                          IdxCtx.getIndexLoc(Loc) };
    147     BaseInfos.push_back(BaseInfo);
    148   }
    149 
    150   for (unsigned i = 0, e = BaseInfos.size(); i != e; ++i) {
    151     if (BaseEntities[i].name && BaseEntities[i].USR)
    152       BaseInfos[i].base = &BaseEntities[i];
    153   }
    154 
    155   for (unsigned i = 0, e = BaseInfos.size(); i != e; ++i)
    156     CXBases.push_back(&BaseInfos[i]);
    157 }
    158 
    159 SourceLocation IndexingContext::CXXBasesListInfo::getBaseLoc(
    160                                            const CXXBaseSpecifier &Base) const {
    161   SourceLocation Loc = Base.getSourceRange().getBegin();
    162   TypeLoc TL;
    163   if (Base.getTypeSourceInfo())
    164     TL = Base.getTypeSourceInfo()->getTypeLoc();
    165   if (TL.isNull())
    166     return Loc;
    167 
    168   if (QualifiedTypeLoc QL = TL.getAs<QualifiedTypeLoc>())
    169     TL = QL.getUnqualifiedLoc();
    170 
    171   if (ElaboratedTypeLoc EL = TL.getAs<ElaboratedTypeLoc>())
    172     return EL.getNamedTypeLoc().getBeginLoc();
    173   if (DependentNameTypeLoc DL = TL.getAs<DependentNameTypeLoc>())
    174     return DL.getNameLoc();
    175   if (DependentTemplateSpecializationTypeLoc DTL =
    176           TL.getAs<DependentTemplateSpecializationTypeLoc>())
    177     return DTL.getTemplateNameLoc();
    178 
    179   return Loc;
    180 }
    181 
    182 const char *ScratchAlloc::toCStr(StringRef Str) {
    183   if (Str.empty())
    184     return "";
    185   if (Str.data()[Str.size()] == '\0')
    186     return Str.data();
    187   return copyCStr(Str);
    188 }
    189 
    190 const char *ScratchAlloc::copyCStr(StringRef Str) {
    191   char *buf = IdxCtx.StrScratch.Allocate<char>(Str.size() + 1);
    192   std::uninitialized_copy(Str.begin(), Str.end(), buf);
    193   buf[Str.size()] = '\0';
    194   return buf;
    195 }
    196 
    197 void IndexingContext::setASTContext(ASTContext &ctx) {
    198   Ctx = &ctx;
    199   cxtu::getASTUnit(CXTU)->setASTContext(&ctx);
    200 }
    201 
    202 void IndexingContext::setPreprocessor(Preprocessor &PP) {
    203   cxtu::getASTUnit(CXTU)->setPreprocessor(&PP);
    204 }
    205 
    206 bool IndexingContext::isFunctionLocalDecl(const Decl *D) {
    207   assert(D);
    208 
    209   if (!D->getParentFunctionOrMethod())
    210     return false;
    211 
    212   if (const NamedDecl *ND = dyn_cast<NamedDecl>(D)) {
    213     switch (ND->getLinkage()) {
    214     case NoLinkage:
    215     case InternalLinkage:
    216       return true;
    217     case UniqueExternalLinkage:
    218     case ExternalLinkage:
    219       return false;
    220     }
    221   }
    222 
    223   return true;
    224 }
    225 
    226 bool IndexingContext::shouldAbort() {
    227   if (!CB.abortQuery)
    228     return false;
    229   return CB.abortQuery(ClientData, 0);
    230 }
    231 
    232 void IndexingContext::enteredMainFile(const FileEntry *File) {
    233   if (File && CB.enteredMainFile) {
    234     CXIdxClientFile idxFile =
    235       CB.enteredMainFile(ClientData,
    236                          static_cast<CXFile>(const_cast<FileEntry *>(File)), 0);
    237     FileMap[File] = idxFile;
    238   }
    239 }
    240 
    241 void IndexingContext::ppIncludedFile(SourceLocation hashLoc,
    242                                      StringRef filename,
    243                                      const FileEntry *File,
    244                                      bool isImport, bool isAngled,
    245                                      bool isModuleImport) {
    246   if (!CB.ppIncludedFile)
    247     return;
    248 
    249   ScratchAlloc SA(*this);
    250   CXIdxIncludedFileInfo Info = { getIndexLoc(hashLoc),
    251                                  SA.toCStr(filename),
    252                                  static_cast<CXFile>(
    253                                    const_cast<FileEntry *>(File)),
    254                                  isImport, isAngled, isModuleImport };
    255   CXIdxClientFile idxFile = CB.ppIncludedFile(ClientData, &Info);
    256   FileMap[File] = idxFile;
    257 }
    258 
    259 void IndexingContext::importedModule(const ImportDecl *ImportD) {
    260   if (!CB.importedASTFile)
    261     return;
    262 
    263   Module *Mod = ImportD->getImportedModule();
    264   if (!Mod)
    265     return;
    266   std::string ModuleName = Mod->getFullModuleName();
    267 
    268   CXIdxImportedASTFileInfo Info = {
    269                                     static_cast<CXFile>(
    270                                     const_cast<FileEntry *>(Mod->getASTFile())),
    271                                     Mod,
    272                                     getIndexLoc(ImportD->getLocation()),
    273                                     ImportD->isImplicit()
    274                                   };
    275   CXIdxClientASTFile astFile = CB.importedASTFile(ClientData, &Info);
    276   (void)astFile;
    277 }
    278 
    279 void IndexingContext::importedPCH(const FileEntry *File) {
    280   if (!CB.importedASTFile)
    281     return;
    282 
    283   CXIdxImportedASTFileInfo Info = {
    284                                     static_cast<CXFile>(
    285                                       const_cast<FileEntry *>(File)),
    286                                     /*module=*/NULL,
    287                                     getIndexLoc(SourceLocation()),
    288                                     /*isImplicit=*/false
    289                                   };
    290   CXIdxClientASTFile astFile = CB.importedASTFile(ClientData, &Info);
    291   (void)astFile;
    292 }
    293 
    294 void IndexingContext::startedTranslationUnit() {
    295   CXIdxClientContainer idxCont = 0;
    296   if (CB.startedTranslationUnit)
    297     idxCont = CB.startedTranslationUnit(ClientData, 0);
    298   addContainerInMap(Ctx->getTranslationUnitDecl(), idxCont);
    299 }
    300 
    301 void IndexingContext::handleDiagnosticSet(CXDiagnostic CXDiagSet) {
    302   if (!CB.diagnostic)
    303     return;
    304 
    305   CB.diagnostic(ClientData, CXDiagSet, 0);
    306 }
    307 
    308 bool IndexingContext::handleDecl(const NamedDecl *D,
    309                                  SourceLocation Loc, CXCursor Cursor,
    310                                  DeclInfo &DInfo,
    311                                  const DeclContext *LexicalDC) {
    312   if (!CB.indexDeclaration || !D)
    313     return false;
    314   if (D->isImplicit() && shouldIgnoreIfImplicit(D))
    315     return false;
    316 
    317   ScratchAlloc SA(*this);
    318   getEntityInfo(D, DInfo.EntInfo, SA);
    319   if ((!shouldIndexFunctionLocalSymbols() && !DInfo.EntInfo.USR)
    320       || Loc.isInvalid())
    321     return false;
    322 
    323   if (!LexicalDC)
    324     LexicalDC = D->getLexicalDeclContext();
    325 
    326   if (shouldSuppressRefs())
    327     markEntityOccurrenceInFile(D, Loc);
    328 
    329   DInfo.entityInfo = &DInfo.EntInfo;
    330   DInfo.cursor = Cursor;
    331   DInfo.loc = getIndexLoc(Loc);
    332   DInfo.isImplicit = D->isImplicit();
    333 
    334   DInfo.attributes = DInfo.EntInfo.attributes;
    335   DInfo.numAttributes = DInfo.EntInfo.numAttributes;
    336 
    337   getContainerInfo(D->getDeclContext(), DInfo.SemanticContainer);
    338   DInfo.semanticContainer = &DInfo.SemanticContainer;
    339 
    340   if (LexicalDC == D->getDeclContext()) {
    341     DInfo.lexicalContainer = &DInfo.SemanticContainer;
    342   } else if (isTemplateImplicitInstantiation(D)) {
    343     // Implicit instantiations have the lexical context of where they were
    344     // instantiated first. We choose instead the semantic context because:
    345     // 1) at the time that we see the instantiation we have not seen the
    346     //   function where it occurred yet.
    347     // 2) the lexical context of the first instantiation is not useful
    348     //   information anyway.
    349     DInfo.lexicalContainer = &DInfo.SemanticContainer;
    350   } else {
    351     getContainerInfo(LexicalDC, DInfo.LexicalContainer);
    352     DInfo.lexicalContainer = &DInfo.LexicalContainer;
    353   }
    354 
    355   if (DInfo.isContainer) {
    356     getContainerInfo(getEntityContainer(D), DInfo.DeclAsContainer);
    357     DInfo.declAsContainer = &DInfo.DeclAsContainer;
    358   }
    359 
    360   CB.indexDeclaration(ClientData, &DInfo);
    361   return true;
    362 }
    363 
    364 bool IndexingContext::handleObjCContainer(const ObjCContainerDecl *D,
    365                                           SourceLocation Loc, CXCursor Cursor,
    366                                           ObjCContainerDeclInfo &ContDInfo) {
    367   ContDInfo.ObjCContDeclInfo.declInfo = &ContDInfo;
    368   return handleDecl(D, Loc, Cursor, ContDInfo);
    369 }
    370 
    371 bool IndexingContext::handleFunction(const FunctionDecl *D) {
    372   bool isDef = D->isThisDeclarationADefinition();
    373   bool isContainer = isDef;
    374   bool isSkipped = false;
    375   if (D->hasSkippedBody()) {
    376     isSkipped = true;
    377     isDef = true;
    378     isContainer = false;
    379   }
    380 
    381   DeclInfo DInfo(!D->isFirstDeclaration(), isDef, isContainer);
    382   if (isSkipped)
    383     DInfo.flags |= CXIdxDeclFlag_Skipped;
    384   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
    385 }
    386 
    387 bool IndexingContext::handleVar(const VarDecl *D) {
    388   DeclInfo DInfo(!D->isFirstDeclaration(), D->isThisDeclarationADefinition(),
    389                  /*isContainer=*/false);
    390   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
    391 }
    392 
    393 bool IndexingContext::handleField(const FieldDecl *D) {
    394   DeclInfo DInfo(/*isRedeclaration=*/false, /*isDefinition=*/true,
    395                  /*isContainer=*/false);
    396   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
    397 }
    398 
    399 bool IndexingContext::handleEnumerator(const EnumConstantDecl *D) {
    400   DeclInfo DInfo(/*isRedeclaration=*/false, /*isDefinition=*/true,
    401                  /*isContainer=*/false);
    402   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
    403 }
    404 
    405 bool IndexingContext::handleTagDecl(const TagDecl *D) {
    406   if (const CXXRecordDecl *CXXRD = dyn_cast<CXXRecordDecl>(D))
    407     return handleCXXRecordDecl(CXXRD, D);
    408 
    409   DeclInfo DInfo(!D->isFirstDeclaration(), D->isThisDeclarationADefinition(),
    410                  D->isThisDeclarationADefinition());
    411   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
    412 }
    413 
    414 bool IndexingContext::handleTypedefName(const TypedefNameDecl *D) {
    415   DeclInfo DInfo(!D->isFirstDeclaration(), /*isDefinition=*/true,
    416                  /*isContainer=*/false);
    417   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
    418 }
    419 
    420 bool IndexingContext::handleObjCInterface(const ObjCInterfaceDecl *D) {
    421   // For @class forward declarations, suppress them the same way as references.
    422   if (!D->isThisDeclarationADefinition()) {
    423     if (shouldSuppressRefs() && markEntityOccurrenceInFile(D, D->getLocation()))
    424       return false; // already occurred.
    425 
    426     // FIXME: This seems like the wrong definition for redeclaration.
    427     bool isRedeclaration = D->hasDefinition() || D->getPreviousDecl();
    428     ObjCContainerDeclInfo ContDInfo(/*isForwardRef=*/true, isRedeclaration,
    429                                     /*isImplementation=*/false);
    430     return handleObjCContainer(D, D->getLocation(),
    431                                MakeCursorObjCClassRef(D, D->getLocation(),
    432                                                       CXTU),
    433                                ContDInfo);
    434   }
    435 
    436   ScratchAlloc SA(*this);
    437 
    438   CXIdxBaseClassInfo BaseClass;
    439   EntityInfo BaseEntity;
    440   BaseClass.cursor = clang_getNullCursor();
    441   if (ObjCInterfaceDecl *SuperD = D->getSuperClass()) {
    442     getEntityInfo(SuperD, BaseEntity, SA);
    443     SourceLocation SuperLoc = D->getSuperClassLoc();
    444     BaseClass.base = &BaseEntity;
    445     BaseClass.cursor = MakeCursorObjCSuperClassRef(SuperD, SuperLoc, CXTU);
    446     BaseClass.loc = getIndexLoc(SuperLoc);
    447 
    448     if (shouldSuppressRefs())
    449       markEntityOccurrenceInFile(SuperD, SuperLoc);
    450   }
    451 
    452   ObjCProtocolList EmptyProtoList;
    453   ObjCProtocolListInfo ProtInfo(D->isThisDeclarationADefinition()
    454                                   ? D->getReferencedProtocols()
    455                                   : EmptyProtoList,
    456                                 *this, SA);
    457 
    458   ObjCInterfaceDeclInfo InterInfo(D);
    459   InterInfo.ObjCProtoListInfo = ProtInfo.getListInfo();
    460   InterInfo.ObjCInterDeclInfo.containerInfo = &InterInfo.ObjCContDeclInfo;
    461   InterInfo.ObjCInterDeclInfo.superInfo = D->getSuperClass() ? &BaseClass : 0;
    462   InterInfo.ObjCInterDeclInfo.protocols = &InterInfo.ObjCProtoListInfo;
    463 
    464   return handleObjCContainer(D, D->getLocation(), getCursor(D), InterInfo);
    465 }
    466 
    467 bool IndexingContext::handleObjCImplementation(
    468                                               const ObjCImplementationDecl *D) {
    469   ObjCContainerDeclInfo ContDInfo(/*isForwardRef=*/false,
    470                       /*isRedeclaration=*/true,
    471                       /*isImplementation=*/true);
    472   return handleObjCContainer(D, D->getLocation(), getCursor(D), ContDInfo);
    473 }
    474 
    475 bool IndexingContext::handleObjCProtocol(const ObjCProtocolDecl *D) {
    476   if (!D->isThisDeclarationADefinition()) {
    477     if (shouldSuppressRefs() && markEntityOccurrenceInFile(D, D->getLocation()))
    478       return false; // already occurred.
    479 
    480     // FIXME: This seems like the wrong definition for redeclaration.
    481     bool isRedeclaration = D->hasDefinition() || D->getPreviousDecl();
    482     ObjCContainerDeclInfo ContDInfo(/*isForwardRef=*/true,
    483                                     isRedeclaration,
    484                                     /*isImplementation=*/false);
    485     return handleObjCContainer(D, D->getLocation(),
    486                                MakeCursorObjCProtocolRef(D, D->getLocation(),
    487                                                          CXTU),
    488                                ContDInfo);
    489   }
    490 
    491   ScratchAlloc SA(*this);
    492   ObjCProtocolList EmptyProtoList;
    493   ObjCProtocolListInfo ProtListInfo(D->isThisDeclarationADefinition()
    494                                       ? D->getReferencedProtocols()
    495                                       : EmptyProtoList,
    496                                     *this, SA);
    497 
    498   ObjCProtocolDeclInfo ProtInfo(D);
    499   ProtInfo.ObjCProtoRefListInfo = ProtListInfo.getListInfo();
    500 
    501   return handleObjCContainer(D, D->getLocation(), getCursor(D), ProtInfo);
    502 }
    503 
    504 bool IndexingContext::handleObjCCategory(const ObjCCategoryDecl *D) {
    505   ScratchAlloc SA(*this);
    506 
    507   ObjCCategoryDeclInfo CatDInfo(/*isImplementation=*/false);
    508   EntityInfo ClassEntity;
    509   const ObjCInterfaceDecl *IFaceD = D->getClassInterface();
    510   SourceLocation ClassLoc = D->getLocation();
    511   SourceLocation CategoryLoc = D->IsClassExtension() ? ClassLoc
    512                                                      : D->getCategoryNameLoc();
    513   getEntityInfo(IFaceD, ClassEntity, SA);
    514 
    515   if (shouldSuppressRefs())
    516     markEntityOccurrenceInFile(IFaceD, ClassLoc);
    517 
    518   ObjCProtocolListInfo ProtInfo(D->getReferencedProtocols(), *this, SA);
    519 
    520   CatDInfo.ObjCCatDeclInfo.containerInfo = &CatDInfo.ObjCContDeclInfo;
    521   if (IFaceD) {
    522     CatDInfo.ObjCCatDeclInfo.objcClass = &ClassEntity;
    523     CatDInfo.ObjCCatDeclInfo.classCursor =
    524         MakeCursorObjCClassRef(IFaceD, ClassLoc, CXTU);
    525   } else {
    526     CatDInfo.ObjCCatDeclInfo.objcClass = 0;
    527     CatDInfo.ObjCCatDeclInfo.classCursor = clang_getNullCursor();
    528   }
    529   CatDInfo.ObjCCatDeclInfo.classLoc = getIndexLoc(ClassLoc);
    530   CatDInfo.ObjCProtoListInfo = ProtInfo.getListInfo();
    531   CatDInfo.ObjCCatDeclInfo.protocols = &CatDInfo.ObjCProtoListInfo;
    532 
    533   return handleObjCContainer(D, CategoryLoc, getCursor(D), CatDInfo);
    534 }
    535 
    536 bool IndexingContext::handleObjCCategoryImpl(const ObjCCategoryImplDecl *D) {
    537   ScratchAlloc SA(*this);
    538 
    539   const ObjCCategoryDecl *CatD = D->getCategoryDecl();
    540   ObjCCategoryDeclInfo CatDInfo(/*isImplementation=*/true);
    541   EntityInfo ClassEntity;
    542   const ObjCInterfaceDecl *IFaceD = CatD->getClassInterface();
    543   SourceLocation ClassLoc = D->getLocation();
    544   SourceLocation CategoryLoc = D->getCategoryNameLoc();
    545   getEntityInfo(IFaceD, ClassEntity, SA);
    546 
    547   if (shouldSuppressRefs())
    548     markEntityOccurrenceInFile(IFaceD, ClassLoc);
    549 
    550   CatDInfo.ObjCCatDeclInfo.containerInfo = &CatDInfo.ObjCContDeclInfo;
    551   if (IFaceD) {
    552     CatDInfo.ObjCCatDeclInfo.objcClass = &ClassEntity;
    553     CatDInfo.ObjCCatDeclInfo.classCursor =
    554         MakeCursorObjCClassRef(IFaceD, ClassLoc, CXTU);
    555   } else {
    556     CatDInfo.ObjCCatDeclInfo.objcClass = 0;
    557     CatDInfo.ObjCCatDeclInfo.classCursor = clang_getNullCursor();
    558   }
    559   CatDInfo.ObjCCatDeclInfo.classLoc = getIndexLoc(ClassLoc);
    560   CatDInfo.ObjCCatDeclInfo.protocols = 0;
    561 
    562   return handleObjCContainer(D, CategoryLoc, getCursor(D), CatDInfo);
    563 }
    564 
    565 bool IndexingContext::handleObjCMethod(const ObjCMethodDecl *D) {
    566   bool isDef = D->isThisDeclarationADefinition();
    567   bool isContainer = isDef;
    568   bool isSkipped = false;
    569   if (D->hasSkippedBody()) {
    570     isSkipped = true;
    571     isDef = true;
    572     isContainer = false;
    573   }
    574 
    575   DeclInfo DInfo(!D->isCanonicalDecl(), isDef, isContainer);
    576   if (isSkipped)
    577     DInfo.flags |= CXIdxDeclFlag_Skipped;
    578   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
    579 }
    580 
    581 bool IndexingContext::handleSynthesizedObjCProperty(
    582                                                 const ObjCPropertyImplDecl *D) {
    583   ObjCPropertyDecl *PD = D->getPropertyDecl();
    584   return handleReference(PD, D->getLocation(), getCursor(D), 0, D->getDeclContext());
    585 }
    586 
    587 bool IndexingContext::handleSynthesizedObjCMethod(const ObjCMethodDecl *D,
    588                                                   SourceLocation Loc,
    589                                                  const DeclContext *LexicalDC) {
    590   DeclInfo DInfo(/*isRedeclaration=*/true, /*isDefinition=*/true,
    591                  /*isContainer=*/false);
    592   return handleDecl(D, Loc, getCursor(D), DInfo, LexicalDC);
    593 }
    594 
    595 bool IndexingContext::handleObjCProperty(const ObjCPropertyDecl *D) {
    596   ScratchAlloc SA(*this);
    597 
    598   ObjCPropertyDeclInfo DInfo;
    599   EntityInfo GetterEntity;
    600   EntityInfo SetterEntity;
    601 
    602   DInfo.ObjCPropDeclInfo.declInfo = &DInfo;
    603 
    604   if (ObjCMethodDecl *Getter = D->getGetterMethodDecl()) {
    605     getEntityInfo(Getter, GetterEntity, SA);
    606     DInfo.ObjCPropDeclInfo.getter = &GetterEntity;
    607   } else {
    608     DInfo.ObjCPropDeclInfo.getter = 0;
    609   }
    610   if (ObjCMethodDecl *Setter = D->getSetterMethodDecl()) {
    611     getEntityInfo(Setter, SetterEntity, SA);
    612     DInfo.ObjCPropDeclInfo.setter = &SetterEntity;
    613   } else {
    614     DInfo.ObjCPropDeclInfo.setter = 0;
    615   }
    616 
    617   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
    618 }
    619 
    620 bool IndexingContext::handleNamespace(const NamespaceDecl *D) {
    621   DeclInfo DInfo(/*isRedeclaration=*/!D->isOriginalNamespace(),
    622                  /*isDefinition=*/true,
    623                  /*isContainer=*/true);
    624   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
    625 }
    626 
    627 bool IndexingContext::handleClassTemplate(const ClassTemplateDecl *D) {
    628   return handleCXXRecordDecl(D->getTemplatedDecl(), D);
    629 }
    630 
    631 bool IndexingContext::handleFunctionTemplate(const FunctionTemplateDecl *D) {
    632   DeclInfo DInfo(/*isRedeclaration=*/!D->isCanonicalDecl(),
    633                  /*isDefinition=*/D->isThisDeclarationADefinition(),
    634                  /*isContainer=*/D->isThisDeclarationADefinition());
    635   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
    636 }
    637 
    638 bool IndexingContext::handleTypeAliasTemplate(const TypeAliasTemplateDecl *D) {
    639   DeclInfo DInfo(/*isRedeclaration=*/!D->isCanonicalDecl(),
    640                  /*isDefinition=*/true, /*isContainer=*/false);
    641   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
    642 }
    643 
    644 bool IndexingContext::handleReference(const NamedDecl *D, SourceLocation Loc,
    645                                       const NamedDecl *Parent,
    646                                       const DeclContext *DC,
    647                                       const Expr *E,
    648                                       CXIdxEntityRefKind Kind) {
    649   if (!D)
    650     return false;
    651 
    652   CXCursor Cursor = E ? MakeCXCursor(E, cast<Decl>(DC), CXTU)
    653                       : getRefCursor(D, Loc);
    654   return handleReference(D, Loc, Cursor, Parent, DC, E, Kind);
    655 }
    656 
    657 bool IndexingContext::handleReference(const NamedDecl *D, SourceLocation Loc,
    658                                       CXCursor Cursor,
    659                                       const NamedDecl *Parent,
    660                                       const DeclContext *DC,
    661                                       const Expr *E,
    662                                       CXIdxEntityRefKind Kind) {
    663   if (!CB.indexEntityReference)
    664     return false;
    665 
    666   if (!D)
    667     return false;
    668   if (Loc.isInvalid())
    669     return false;
    670   if (!shouldIndexFunctionLocalSymbols() && isFunctionLocalDecl(D))
    671     return false;
    672   if (isNotFromSourceFile(D->getLocation()))
    673     return false;
    674   if (D->isImplicit() && shouldIgnoreIfImplicit(D))
    675     return false;
    676 
    677   if (shouldSuppressRefs()) {
    678     if (markEntityOccurrenceInFile(D, Loc))
    679       return false; // already occurred.
    680   }
    681 
    682   ScratchAlloc SA(*this);
    683   EntityInfo RefEntity, ParentEntity;
    684   getEntityInfo(D, RefEntity, SA);
    685   if (!RefEntity.USR)
    686     return false;
    687 
    688   getEntityInfo(Parent, ParentEntity, SA);
    689 
    690   ContainerInfo Container;
    691   getContainerInfo(DC, Container);
    692 
    693   CXIdxEntityRefInfo Info = { Kind,
    694                               Cursor,
    695                               getIndexLoc(Loc),
    696                               &RefEntity,
    697                               Parent ? &ParentEntity : 0,
    698                               &Container };
    699   CB.indexEntityReference(ClientData, &Info);
    700   return true;
    701 }
    702 
    703 bool IndexingContext::isNotFromSourceFile(SourceLocation Loc) const {
    704   if (Loc.isInvalid())
    705     return true;
    706   SourceManager &SM = Ctx->getSourceManager();
    707   SourceLocation FileLoc = SM.getFileLoc(Loc);
    708   FileID FID = SM.getFileID(FileLoc);
    709   return SM.getFileEntryForID(FID) == 0;
    710 }
    711 
    712 void IndexingContext::addContainerInMap(const DeclContext *DC,
    713                                         CXIdxClientContainer container) {
    714   if (!DC)
    715     return;
    716 
    717   ContainerMapTy::iterator I = ContainerMap.find(DC);
    718   if (I == ContainerMap.end()) {
    719     if (container)
    720       ContainerMap[DC] = container;
    721     return;
    722   }
    723   // Allow changing the container of a previously seen DeclContext so we
    724   // can handle invalid user code, like a function re-definition.
    725   if (container)
    726     I->second = container;
    727   else
    728     ContainerMap.erase(I);
    729 }
    730 
    731 CXIdxClientEntity IndexingContext::getClientEntity(const Decl *D) const {
    732   if (!D)
    733     return 0;
    734   EntityMapTy::const_iterator I = EntityMap.find(D);
    735   if (I == EntityMap.end())
    736     return 0;
    737   return I->second;
    738 }
    739 
    740 void IndexingContext::setClientEntity(const Decl *D, CXIdxClientEntity client) {
    741   if (!D)
    742     return;
    743   EntityMap[D] = client;
    744 }
    745 
    746 bool IndexingContext::handleCXXRecordDecl(const CXXRecordDecl *RD,
    747                                           const NamedDecl *OrigD) {
    748   if (RD->isThisDeclarationADefinition()) {
    749     ScratchAlloc SA(*this);
    750     CXXClassDeclInfo CXXDInfo(/*isRedeclaration=*/!OrigD->isCanonicalDecl(),
    751                            /*isDefinition=*/RD->isThisDeclarationADefinition());
    752     CXXBasesListInfo BaseList(RD, *this, SA);
    753     CXXDInfo.CXXClassInfo.declInfo = &CXXDInfo;
    754     CXXDInfo.CXXClassInfo.bases = BaseList.getBases();
    755     CXXDInfo.CXXClassInfo.numBases = BaseList.getNumBases();
    756 
    757     if (shouldSuppressRefs()) {
    758       // Go through bases and mark them as referenced.
    759       for (unsigned i = 0, e = BaseList.getNumBases(); i != e; ++i) {
    760         const CXIdxBaseClassInfo *baseInfo = BaseList.getBases()[i];
    761         if (baseInfo->base) {
    762           const NamedDecl *BaseD = BaseList.BaseEntities[i].Dcl;
    763           SourceLocation
    764             Loc = SourceLocation::getFromRawEncoding(baseInfo->loc.int_data);
    765           markEntityOccurrenceInFile(BaseD, Loc);
    766         }
    767       }
    768     }
    769 
    770     return handleDecl(OrigD, OrigD->getLocation(), getCursor(OrigD), CXXDInfo);
    771   }
    772 
    773   DeclInfo DInfo(/*isRedeclaration=*/!OrigD->isCanonicalDecl(),
    774                  /*isDefinition=*/RD->isThisDeclarationADefinition(),
    775                  /*isContainer=*/RD->isThisDeclarationADefinition());
    776   return handleDecl(OrigD, OrigD->getLocation(), getCursor(OrigD), DInfo);
    777 }
    778 
    779 bool IndexingContext::markEntityOccurrenceInFile(const NamedDecl *D,
    780                                                  SourceLocation Loc) {
    781   if (!D || Loc.isInvalid())
    782     return true;
    783 
    784   SourceManager &SM = Ctx->getSourceManager();
    785   D = getEntityDecl(D);
    786 
    787   std::pair<FileID, unsigned> LocInfo = SM.getDecomposedLoc(SM.getFileLoc(Loc));
    788   FileID FID = LocInfo.first;
    789   if (FID.isInvalid())
    790     return true;
    791 
    792   const FileEntry *FE = SM.getFileEntryForID(FID);
    793   if (!FE)
    794     return true;
    795   RefFileOccurence RefOccur(FE, D);
    796   std::pair<llvm::DenseSet<RefFileOccurence>::iterator, bool>
    797   res = RefFileOccurences.insert(RefOccur);
    798   if (!res.second)
    799     return true; // already in map.
    800 
    801   return false;
    802 }
    803 
    804 const NamedDecl *IndexingContext::getEntityDecl(const NamedDecl *D) const {
    805   assert(D);
    806   D = cast<NamedDecl>(D->getCanonicalDecl());
    807 
    808   if (const ObjCImplementationDecl *
    809                ImplD = dyn_cast<ObjCImplementationDecl>(D)) {
    810     return getEntityDecl(ImplD->getClassInterface());
    811 
    812   } else if (const ObjCCategoryImplDecl *
    813                CatImplD = dyn_cast<ObjCCategoryImplDecl>(D)) {
    814     return getEntityDecl(CatImplD->getCategoryDecl());
    815   } else if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
    816     if (FunctionTemplateDecl *TemplD = FD->getDescribedFunctionTemplate())
    817       return getEntityDecl(TemplD);
    818   } else if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(D)) {
    819     if (ClassTemplateDecl *TemplD = RD->getDescribedClassTemplate())
    820       return getEntityDecl(TemplD);
    821   }
    822 
    823   return D;
    824 }
    825 
    826 const DeclContext *
    827 IndexingContext::getEntityContainer(const Decl *D) const {
    828   const DeclContext *DC = dyn_cast<DeclContext>(D);
    829   if (DC)
    830     return DC;
    831 
    832   if (const ClassTemplateDecl *ClassTempl = dyn_cast<ClassTemplateDecl>(D)) {
    833     DC = ClassTempl->getTemplatedDecl();
    834   } else if (const FunctionTemplateDecl *
    835           FuncTempl = dyn_cast<FunctionTemplateDecl>(D)) {
    836     DC = FuncTempl->getTemplatedDecl();
    837   }
    838 
    839   return DC;
    840 }
    841 
    842 CXIdxClientContainer
    843 IndexingContext::getClientContainerForDC(const DeclContext *DC) const {
    844   if (!DC)
    845     return 0;
    846 
    847   ContainerMapTy::const_iterator I = ContainerMap.find(DC);
    848   if (I == ContainerMap.end())
    849     return 0;
    850 
    851   return I->second;
    852 }
    853 
    854 CXIdxClientFile IndexingContext::getIndexFile(const FileEntry *File) {
    855   if (!File)
    856     return 0;
    857 
    858   FileMapTy::iterator FI = FileMap.find(File);
    859   if (FI != FileMap.end())
    860     return FI->second;
    861 
    862   return 0;
    863 }
    864 
    865 CXIdxLoc IndexingContext::getIndexLoc(SourceLocation Loc) const {
    866   CXIdxLoc idxLoc =  { {0, 0}, 0 };
    867   if (Loc.isInvalid())
    868     return idxLoc;
    869 
    870   idxLoc.ptr_data[0] = const_cast<IndexingContext *>(this);
    871   idxLoc.int_data = Loc.getRawEncoding();
    872   return idxLoc;
    873 }
    874 
    875 void IndexingContext::translateLoc(SourceLocation Loc,
    876                                    CXIdxClientFile *indexFile, CXFile *file,
    877                                    unsigned *line, unsigned *column,
    878                                    unsigned *offset) {
    879   if (Loc.isInvalid())
    880     return;
    881 
    882   SourceManager &SM = Ctx->getSourceManager();
    883   Loc = SM.getFileLoc(Loc);
    884 
    885   std::pair<FileID, unsigned> LocInfo = SM.getDecomposedLoc(Loc);
    886   FileID FID = LocInfo.first;
    887   unsigned FileOffset = LocInfo.second;
    888 
    889   if (FID.isInvalid())
    890     return;
    891 
    892   const FileEntry *FE = SM.getFileEntryForID(FID);
    893   if (indexFile)
    894     *indexFile = getIndexFile(FE);
    895   if (file)
    896     *file = const_cast<FileEntry *>(FE);
    897   if (line)
    898     *line = SM.getLineNumber(FID, FileOffset);
    899   if (column)
    900     *column = SM.getColumnNumber(FID, FileOffset);
    901   if (offset)
    902     *offset = FileOffset;
    903 }
    904 
    905 void IndexingContext::getEntityInfo(const NamedDecl *D,
    906                                     EntityInfo &EntityInfo,
    907                                     ScratchAlloc &SA) {
    908   if (!D)
    909     return;
    910 
    911   D = getEntityDecl(D);
    912   EntityInfo.cursor = getCursor(D);
    913   EntityInfo.Dcl = D;
    914   EntityInfo.IndexCtx = this;
    915   EntityInfo.kind = CXIdxEntity_Unexposed;
    916   EntityInfo.templateKind = CXIdxEntity_NonTemplate;
    917   EntityInfo.lang = CXIdxEntityLang_C;
    918 
    919   if (D->hasAttrs()) {
    920     EntityInfo.AttrList = AttrListInfo::create(D, *this);
    921     EntityInfo.attributes = EntityInfo.AttrList->getAttrs();
    922     EntityInfo.numAttributes = EntityInfo.AttrList->getNumAttrs();
    923   }
    924 
    925   if (const TagDecl *TD = dyn_cast<TagDecl>(D)) {
    926     switch (TD->getTagKind()) {
    927     case TTK_Struct:
    928       EntityInfo.kind = CXIdxEntity_Struct; break;
    929     case TTK_Union:
    930       EntityInfo.kind = CXIdxEntity_Union; break;
    931     case TTK_Class:
    932       EntityInfo.kind = CXIdxEntity_CXXClass;
    933       EntityInfo.lang = CXIdxEntityLang_CXX;
    934       break;
    935     case TTK_Interface:
    936       EntityInfo.kind = CXIdxEntity_CXXInterface;
    937       EntityInfo.lang = CXIdxEntityLang_CXX;
    938       break;
    939     case TTK_Enum:
    940       EntityInfo.kind = CXIdxEntity_Enum; break;
    941     }
    942 
    943     if (const CXXRecordDecl *CXXRec = dyn_cast<CXXRecordDecl>(D))
    944       if (!CXXRec->isCLike())
    945         EntityInfo.lang = CXIdxEntityLang_CXX;
    946 
    947     if (isa<ClassTemplatePartialSpecializationDecl>(D)) {
    948       EntityInfo.templateKind = CXIdxEntity_TemplatePartialSpecialization;
    949     } else if (isa<ClassTemplateSpecializationDecl>(D)) {
    950       EntityInfo.templateKind = CXIdxEntity_TemplateSpecialization;
    951     }
    952 
    953   } else {
    954     switch (D->getKind()) {
    955     case Decl::Typedef:
    956       EntityInfo.kind = CXIdxEntity_Typedef; break;
    957     case Decl::Function:
    958       EntityInfo.kind = CXIdxEntity_Function;
    959       break;
    960     case Decl::ParmVar:
    961       EntityInfo.kind = CXIdxEntity_Variable;
    962       break;
    963     case Decl::Var:
    964       EntityInfo.kind = CXIdxEntity_Variable;
    965       if (isa<CXXRecordDecl>(D->getDeclContext())) {
    966         EntityInfo.kind = CXIdxEntity_CXXStaticVariable;
    967         EntityInfo.lang = CXIdxEntityLang_CXX;
    968       }
    969       break;
    970     case Decl::Field:
    971       EntityInfo.kind = CXIdxEntity_Field;
    972       if (const CXXRecordDecl *
    973             CXXRec = dyn_cast<CXXRecordDecl>(D->getDeclContext())) {
    974         // FIXME: isPOD check is not sufficient, a POD can contain methods,
    975         // we want a isCStructLike check.
    976         if (!CXXRec->isPOD())
    977           EntityInfo.lang = CXIdxEntityLang_CXX;
    978       }
    979       break;
    980     case Decl::EnumConstant:
    981       EntityInfo.kind = CXIdxEntity_EnumConstant; break;
    982     case Decl::ObjCInterface:
    983       EntityInfo.kind = CXIdxEntity_ObjCClass;
    984       EntityInfo.lang = CXIdxEntityLang_ObjC;
    985       break;
    986     case Decl::ObjCProtocol:
    987       EntityInfo.kind = CXIdxEntity_ObjCProtocol;
    988       EntityInfo.lang = CXIdxEntityLang_ObjC;
    989       break;
    990     case Decl::ObjCCategory:
    991       EntityInfo.kind = CXIdxEntity_ObjCCategory;
    992       EntityInfo.lang = CXIdxEntityLang_ObjC;
    993       break;
    994     case Decl::ObjCMethod:
    995       if (cast<ObjCMethodDecl>(D)->isInstanceMethod())
    996         EntityInfo.kind = CXIdxEntity_ObjCInstanceMethod;
    997       else
    998         EntityInfo.kind = CXIdxEntity_ObjCClassMethod;
    999       EntityInfo.lang = CXIdxEntityLang_ObjC;
   1000       break;
   1001     case Decl::ObjCProperty:
   1002       EntityInfo.kind = CXIdxEntity_ObjCProperty;
   1003       EntityInfo.lang = CXIdxEntityLang_ObjC;
   1004       break;
   1005     case Decl::ObjCIvar:
   1006       EntityInfo.kind = CXIdxEntity_ObjCIvar;
   1007       EntityInfo.lang = CXIdxEntityLang_ObjC;
   1008       break;
   1009     case Decl::Namespace:
   1010       EntityInfo.kind = CXIdxEntity_CXXNamespace;
   1011       EntityInfo.lang = CXIdxEntityLang_CXX;
   1012       break;
   1013     case Decl::NamespaceAlias:
   1014       EntityInfo.kind = CXIdxEntity_CXXNamespaceAlias;
   1015       EntityInfo.lang = CXIdxEntityLang_CXX;
   1016       break;
   1017     case Decl::CXXConstructor:
   1018       EntityInfo.kind = CXIdxEntity_CXXConstructor;
   1019       EntityInfo.lang = CXIdxEntityLang_CXX;
   1020       break;
   1021     case Decl::CXXDestructor:
   1022       EntityInfo.kind = CXIdxEntity_CXXDestructor;
   1023       EntityInfo.lang = CXIdxEntityLang_CXX;
   1024       break;
   1025     case Decl::CXXConversion:
   1026       EntityInfo.kind = CXIdxEntity_CXXConversionFunction;
   1027       EntityInfo.lang = CXIdxEntityLang_CXX;
   1028       break;
   1029     case Decl::CXXMethod: {
   1030       const CXXMethodDecl *MD = cast<CXXMethodDecl>(D);
   1031       if (MD->isStatic())
   1032         EntityInfo.kind = CXIdxEntity_CXXStaticMethod;
   1033       else
   1034         EntityInfo.kind = CXIdxEntity_CXXInstanceMethod;
   1035       EntityInfo.lang = CXIdxEntityLang_CXX;
   1036       break;
   1037     }
   1038     case Decl::ClassTemplate:
   1039       EntityInfo.kind = CXIdxEntity_CXXClass;
   1040       EntityInfo.templateKind = CXIdxEntity_Template;
   1041       break;
   1042     case Decl::FunctionTemplate:
   1043       EntityInfo.kind = CXIdxEntity_Function;
   1044       EntityInfo.templateKind = CXIdxEntity_Template;
   1045       if (const CXXMethodDecl *MD = dyn_cast_or_null<CXXMethodDecl>(
   1046                            cast<FunctionTemplateDecl>(D)->getTemplatedDecl())) {
   1047         if (isa<CXXConstructorDecl>(MD))
   1048           EntityInfo.kind = CXIdxEntity_CXXConstructor;
   1049         else if (isa<CXXDestructorDecl>(MD))
   1050           EntityInfo.kind = CXIdxEntity_CXXDestructor;
   1051         else if (isa<CXXConversionDecl>(MD))
   1052           EntityInfo.kind = CXIdxEntity_CXXConversionFunction;
   1053         else {
   1054           if (MD->isStatic())
   1055             EntityInfo.kind = CXIdxEntity_CXXStaticMethod;
   1056           else
   1057             EntityInfo.kind = CXIdxEntity_CXXInstanceMethod;
   1058         }
   1059       }
   1060       break;
   1061     case Decl::TypeAliasTemplate:
   1062       EntityInfo.kind = CXIdxEntity_CXXTypeAlias;
   1063       EntityInfo.templateKind = CXIdxEntity_Template;
   1064       break;
   1065     case Decl::TypeAlias:
   1066       EntityInfo.kind = CXIdxEntity_CXXTypeAlias;
   1067       EntityInfo.lang = CXIdxEntityLang_CXX;
   1068       break;
   1069     default:
   1070       break;
   1071     }
   1072   }
   1073 
   1074   if (EntityInfo.kind == CXIdxEntity_Unexposed)
   1075     return;
   1076 
   1077   if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
   1078     if (FD->getTemplatedKind() ==
   1079           FunctionDecl::TK_FunctionTemplateSpecialization)
   1080       EntityInfo.templateKind = CXIdxEntity_TemplateSpecialization;
   1081   }
   1082 
   1083   if (EntityInfo.templateKind != CXIdxEntity_NonTemplate)
   1084     EntityInfo.lang = CXIdxEntityLang_CXX;
   1085 
   1086   if (IdentifierInfo *II = D->getIdentifier()) {
   1087     EntityInfo.name = SA.toCStr(II->getName());
   1088 
   1089   } else if (isa<TagDecl>(D) || isa<FieldDecl>(D) || isa<NamespaceDecl>(D)) {
   1090     EntityInfo.name = 0; // anonymous tag/field/namespace.
   1091 
   1092   } else {
   1093     SmallString<256> StrBuf;
   1094     {
   1095       llvm::raw_svector_ostream OS(StrBuf);
   1096       D->printName(OS);
   1097     }
   1098     EntityInfo.name = SA.copyCStr(StrBuf.str());
   1099   }
   1100 
   1101   {
   1102     SmallString<512> StrBuf;
   1103     bool Ignore = getDeclCursorUSR(D, StrBuf);
   1104     if (Ignore) {
   1105       EntityInfo.USR = 0;
   1106     } else {
   1107       EntityInfo.USR = SA.copyCStr(StrBuf.str());
   1108     }
   1109   }
   1110 }
   1111 
   1112 void IndexingContext::getContainerInfo(const DeclContext *DC,
   1113                                        ContainerInfo &ContInfo) {
   1114   ContInfo.cursor = getCursor(cast<Decl>(DC));
   1115   ContInfo.DC = DC;
   1116   ContInfo.IndexCtx = this;
   1117 }
   1118 
   1119 CXCursor IndexingContext::getRefCursor(const NamedDecl *D, SourceLocation Loc) {
   1120   if (const TypeDecl *TD = dyn_cast<TypeDecl>(D))
   1121     return MakeCursorTypeRef(TD, Loc, CXTU);
   1122   if (const ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(D))
   1123     return MakeCursorObjCClassRef(ID, Loc, CXTU);
   1124   if (const ObjCProtocolDecl *PD = dyn_cast<ObjCProtocolDecl>(D))
   1125     return MakeCursorObjCProtocolRef(PD, Loc, CXTU);
   1126   if (const TemplateDecl *Template = dyn_cast<TemplateDecl>(D))
   1127     return MakeCursorTemplateRef(Template, Loc, CXTU);
   1128   if (const NamespaceDecl *Namespace = dyn_cast<NamespaceDecl>(D))
   1129     return MakeCursorNamespaceRef(Namespace, Loc, CXTU);
   1130   if (const NamespaceAliasDecl *Namespace = dyn_cast<NamespaceAliasDecl>(D))
   1131     return MakeCursorNamespaceRef(Namespace, Loc, CXTU);
   1132   if (const FieldDecl *Field = dyn_cast<FieldDecl>(D))
   1133     return MakeCursorMemberRef(Field, Loc, CXTU);
   1134   if (const VarDecl *Var = dyn_cast<VarDecl>(D))
   1135     return MakeCursorVariableRef(Var, Loc, CXTU);
   1136 
   1137   return clang_getNullCursor();
   1138 }
   1139 
   1140 bool IndexingContext::shouldIgnoreIfImplicit(const Decl *D) {
   1141   if (isa<ObjCInterfaceDecl>(D))
   1142     return false;
   1143   if (isa<ObjCCategoryDecl>(D))
   1144     return false;
   1145   if (isa<ObjCIvarDecl>(D))
   1146     return false;
   1147   if (isa<ObjCMethodDecl>(D))
   1148     return false;
   1149   if (isa<ImportDecl>(D))
   1150     return false;
   1151   return true;
   1152 }
   1153 
   1154 bool IndexingContext::isTemplateImplicitInstantiation(const Decl *D) {
   1155   if (const ClassTemplateSpecializationDecl *
   1156         SD = dyn_cast<ClassTemplateSpecializationDecl>(D)) {
   1157     return SD->getSpecializationKind() == TSK_ImplicitInstantiation;
   1158   }
   1159   if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
   1160     return FD->getTemplateSpecializationKind() == TSK_ImplicitInstantiation;
   1161   }
   1162   return false;
   1163 }
   1164