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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->getFormalLinkage()) {
    214     case NoLinkage:
    215     case VisibleNoLinkage:
    216     case InternalLinkage:
    217       return true;
    218     case UniqueExternalLinkage:
    219       llvm_unreachable("Not a sema linkage");
    220     case ExternalLinkage:
    221       return false;
    222     }
    223   }
    224 
    225   return true;
    226 }
    227 
    228 bool IndexingContext::shouldAbort() {
    229   if (!CB.abortQuery)
    230     return false;
    231   return CB.abortQuery(ClientData, 0);
    232 }
    233 
    234 void IndexingContext::enteredMainFile(const FileEntry *File) {
    235   if (File && CB.enteredMainFile) {
    236     CXIdxClientFile idxFile =
    237       CB.enteredMainFile(ClientData,
    238                          static_cast<CXFile>(const_cast<FileEntry *>(File)), 0);
    239     FileMap[File] = idxFile;
    240   }
    241 }
    242 
    243 void IndexingContext::ppIncludedFile(SourceLocation hashLoc,
    244                                      StringRef filename,
    245                                      const FileEntry *File,
    246                                      bool isImport, bool isAngled,
    247                                      bool isModuleImport) {
    248   if (!CB.ppIncludedFile)
    249     return;
    250 
    251   ScratchAlloc SA(*this);
    252   CXIdxIncludedFileInfo Info = { getIndexLoc(hashLoc),
    253                                  SA.toCStr(filename),
    254                                  static_cast<CXFile>(
    255                                    const_cast<FileEntry *>(File)),
    256                                  isImport, isAngled, isModuleImport };
    257   CXIdxClientFile idxFile = CB.ppIncludedFile(ClientData, &Info);
    258   FileMap[File] = idxFile;
    259 }
    260 
    261 void IndexingContext::importedModule(const ImportDecl *ImportD) {
    262   if (!CB.importedASTFile)
    263     return;
    264 
    265   Module *Mod = ImportD->getImportedModule();
    266   if (!Mod)
    267     return;
    268   std::string ModuleName = Mod->getFullModuleName();
    269 
    270   CXIdxImportedASTFileInfo Info = {
    271                                     static_cast<CXFile>(
    272                                     const_cast<FileEntry *>(Mod->getASTFile())),
    273                                     Mod,
    274                                     getIndexLoc(ImportD->getLocation()),
    275                                     ImportD->isImplicit()
    276                                   };
    277   CXIdxClientASTFile astFile = CB.importedASTFile(ClientData, &Info);
    278   (void)astFile;
    279 }
    280 
    281 void IndexingContext::importedPCH(const FileEntry *File) {
    282   if (!CB.importedASTFile)
    283     return;
    284 
    285   CXIdxImportedASTFileInfo Info = {
    286                                     static_cast<CXFile>(
    287                                       const_cast<FileEntry *>(File)),
    288                                     /*module=*/NULL,
    289                                     getIndexLoc(SourceLocation()),
    290                                     /*isImplicit=*/false
    291                                   };
    292   CXIdxClientASTFile astFile = CB.importedASTFile(ClientData, &Info);
    293   (void)astFile;
    294 }
    295 
    296 void IndexingContext::startedTranslationUnit() {
    297   CXIdxClientContainer idxCont = 0;
    298   if (CB.startedTranslationUnit)
    299     idxCont = CB.startedTranslationUnit(ClientData, 0);
    300   addContainerInMap(Ctx->getTranslationUnitDecl(), idxCont);
    301 }
    302 
    303 void IndexingContext::handleDiagnosticSet(CXDiagnostic CXDiagSet) {
    304   if (!CB.diagnostic)
    305     return;
    306 
    307   CB.diagnostic(ClientData, CXDiagSet, 0);
    308 }
    309 
    310 bool IndexingContext::handleDecl(const NamedDecl *D,
    311                                  SourceLocation Loc, CXCursor Cursor,
    312                                  DeclInfo &DInfo,
    313                                  const DeclContext *LexicalDC) {
    314   if (!CB.indexDeclaration || !D)
    315     return false;
    316   if (D->isImplicit() && shouldIgnoreIfImplicit(D))
    317     return false;
    318 
    319   ScratchAlloc SA(*this);
    320   getEntityInfo(D, DInfo.EntInfo, SA);
    321   if ((!shouldIndexFunctionLocalSymbols() && !DInfo.EntInfo.USR)
    322       || Loc.isInvalid())
    323     return false;
    324 
    325   if (!LexicalDC)
    326     LexicalDC = D->getLexicalDeclContext();
    327 
    328   if (shouldSuppressRefs())
    329     markEntityOccurrenceInFile(D, Loc);
    330 
    331   DInfo.entityInfo = &DInfo.EntInfo;
    332   DInfo.cursor = Cursor;
    333   DInfo.loc = getIndexLoc(Loc);
    334   DInfo.isImplicit = D->isImplicit();
    335 
    336   DInfo.attributes = DInfo.EntInfo.attributes;
    337   DInfo.numAttributes = DInfo.EntInfo.numAttributes;
    338 
    339   getContainerInfo(D->getDeclContext(), DInfo.SemanticContainer);
    340   DInfo.semanticContainer = &DInfo.SemanticContainer;
    341 
    342   if (LexicalDC == D->getDeclContext()) {
    343     DInfo.lexicalContainer = &DInfo.SemanticContainer;
    344   } else if (isTemplateImplicitInstantiation(D)) {
    345     // Implicit instantiations have the lexical context of where they were
    346     // instantiated first. We choose instead the semantic context because:
    347     // 1) at the time that we see the instantiation we have not seen the
    348     //   function where it occurred yet.
    349     // 2) the lexical context of the first instantiation is not useful
    350     //   information anyway.
    351     DInfo.lexicalContainer = &DInfo.SemanticContainer;
    352   } else {
    353     getContainerInfo(LexicalDC, DInfo.LexicalContainer);
    354     DInfo.lexicalContainer = &DInfo.LexicalContainer;
    355   }
    356 
    357   if (DInfo.isContainer) {
    358     getContainerInfo(getEntityContainer(D), DInfo.DeclAsContainer);
    359     DInfo.declAsContainer = &DInfo.DeclAsContainer;
    360   }
    361 
    362   CB.indexDeclaration(ClientData, &DInfo);
    363   return true;
    364 }
    365 
    366 bool IndexingContext::handleObjCContainer(const ObjCContainerDecl *D,
    367                                           SourceLocation Loc, CXCursor Cursor,
    368                                           ObjCContainerDeclInfo &ContDInfo) {
    369   ContDInfo.ObjCContDeclInfo.declInfo = &ContDInfo;
    370   return handleDecl(D, Loc, Cursor, ContDInfo);
    371 }
    372 
    373 bool IndexingContext::handleFunction(const FunctionDecl *D) {
    374   bool isDef = D->isThisDeclarationADefinition();
    375   bool isContainer = isDef;
    376   bool isSkipped = false;
    377   if (D->hasSkippedBody()) {
    378     isSkipped = true;
    379     isDef = true;
    380     isContainer = false;
    381   }
    382 
    383   DeclInfo DInfo(!D->isFirstDeclaration(), isDef, isContainer);
    384   if (isSkipped)
    385     DInfo.flags |= CXIdxDeclFlag_Skipped;
    386   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
    387 }
    388 
    389 bool IndexingContext::handleVar(const VarDecl *D) {
    390   DeclInfo DInfo(!D->isFirstDeclaration(), D->isThisDeclarationADefinition(),
    391                  /*isContainer=*/false);
    392   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
    393 }
    394 
    395 bool IndexingContext::handleField(const FieldDecl *D) {
    396   DeclInfo DInfo(/*isRedeclaration=*/false, /*isDefinition=*/true,
    397                  /*isContainer=*/false);
    398   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
    399 }
    400 
    401 bool IndexingContext::handleMSProperty(const MSPropertyDecl *D) {
    402   DeclInfo DInfo(/*isRedeclaration=*/false, /*isDefinition=*/true,
    403                  /*isContainer=*/false);
    404   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
    405 }
    406 
    407 bool IndexingContext::handleEnumerator(const EnumConstantDecl *D) {
    408   DeclInfo DInfo(/*isRedeclaration=*/false, /*isDefinition=*/true,
    409                  /*isContainer=*/false);
    410   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
    411 }
    412 
    413 bool IndexingContext::handleTagDecl(const TagDecl *D) {
    414   if (const CXXRecordDecl *CXXRD = dyn_cast<CXXRecordDecl>(D))
    415     return handleCXXRecordDecl(CXXRD, D);
    416 
    417   DeclInfo DInfo(!D->isFirstDeclaration(), D->isThisDeclarationADefinition(),
    418                  D->isThisDeclarationADefinition());
    419   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
    420 }
    421 
    422 bool IndexingContext::handleTypedefName(const TypedefNameDecl *D) {
    423   DeclInfo DInfo(!D->isFirstDeclaration(), /*isDefinition=*/true,
    424                  /*isContainer=*/false);
    425   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
    426 }
    427 
    428 bool IndexingContext::handleObjCInterface(const ObjCInterfaceDecl *D) {
    429   // For @class forward declarations, suppress them the same way as references.
    430   if (!D->isThisDeclarationADefinition()) {
    431     if (shouldSuppressRefs() && markEntityOccurrenceInFile(D, D->getLocation()))
    432       return false; // already occurred.
    433 
    434     // FIXME: This seems like the wrong definition for redeclaration.
    435     bool isRedeclaration = D->hasDefinition() || D->getPreviousDecl();
    436     ObjCContainerDeclInfo ContDInfo(/*isForwardRef=*/true, isRedeclaration,
    437                                     /*isImplementation=*/false);
    438     return handleObjCContainer(D, D->getLocation(),
    439                                MakeCursorObjCClassRef(D, D->getLocation(),
    440                                                       CXTU),
    441                                ContDInfo);
    442   }
    443 
    444   ScratchAlloc SA(*this);
    445 
    446   CXIdxBaseClassInfo BaseClass;
    447   EntityInfo BaseEntity;
    448   BaseClass.cursor = clang_getNullCursor();
    449   if (ObjCInterfaceDecl *SuperD = D->getSuperClass()) {
    450     getEntityInfo(SuperD, BaseEntity, SA);
    451     SourceLocation SuperLoc = D->getSuperClassLoc();
    452     BaseClass.base = &BaseEntity;
    453     BaseClass.cursor = MakeCursorObjCSuperClassRef(SuperD, SuperLoc, CXTU);
    454     BaseClass.loc = getIndexLoc(SuperLoc);
    455 
    456     if (shouldSuppressRefs())
    457       markEntityOccurrenceInFile(SuperD, SuperLoc);
    458   }
    459 
    460   ObjCProtocolList EmptyProtoList;
    461   ObjCProtocolListInfo ProtInfo(D->isThisDeclarationADefinition()
    462                                   ? D->getReferencedProtocols()
    463                                   : EmptyProtoList,
    464                                 *this, SA);
    465 
    466   ObjCInterfaceDeclInfo InterInfo(D);
    467   InterInfo.ObjCProtoListInfo = ProtInfo.getListInfo();
    468   InterInfo.ObjCInterDeclInfo.containerInfo = &InterInfo.ObjCContDeclInfo;
    469   InterInfo.ObjCInterDeclInfo.superInfo = D->getSuperClass() ? &BaseClass : 0;
    470   InterInfo.ObjCInterDeclInfo.protocols = &InterInfo.ObjCProtoListInfo;
    471 
    472   return handleObjCContainer(D, D->getLocation(), getCursor(D), InterInfo);
    473 }
    474 
    475 bool IndexingContext::handleObjCImplementation(
    476                                               const ObjCImplementationDecl *D) {
    477   ObjCContainerDeclInfo ContDInfo(/*isForwardRef=*/false,
    478                       /*isRedeclaration=*/true,
    479                       /*isImplementation=*/true);
    480   return handleObjCContainer(D, D->getLocation(), getCursor(D), ContDInfo);
    481 }
    482 
    483 bool IndexingContext::handleObjCProtocol(const ObjCProtocolDecl *D) {
    484   if (!D->isThisDeclarationADefinition()) {
    485     if (shouldSuppressRefs() && markEntityOccurrenceInFile(D, D->getLocation()))
    486       return false; // already occurred.
    487 
    488     // FIXME: This seems like the wrong definition for redeclaration.
    489     bool isRedeclaration = D->hasDefinition() || D->getPreviousDecl();
    490     ObjCContainerDeclInfo ContDInfo(/*isForwardRef=*/true,
    491                                     isRedeclaration,
    492                                     /*isImplementation=*/false);
    493     return handleObjCContainer(D, D->getLocation(),
    494                                MakeCursorObjCProtocolRef(D, D->getLocation(),
    495                                                          CXTU),
    496                                ContDInfo);
    497   }
    498 
    499   ScratchAlloc SA(*this);
    500   ObjCProtocolList EmptyProtoList;
    501   ObjCProtocolListInfo ProtListInfo(D->isThisDeclarationADefinition()
    502                                       ? D->getReferencedProtocols()
    503                                       : EmptyProtoList,
    504                                     *this, SA);
    505 
    506   ObjCProtocolDeclInfo ProtInfo(D);
    507   ProtInfo.ObjCProtoRefListInfo = ProtListInfo.getListInfo();
    508 
    509   return handleObjCContainer(D, D->getLocation(), getCursor(D), ProtInfo);
    510 }
    511 
    512 bool IndexingContext::handleObjCCategory(const ObjCCategoryDecl *D) {
    513   ScratchAlloc SA(*this);
    514 
    515   ObjCCategoryDeclInfo CatDInfo(/*isImplementation=*/false);
    516   EntityInfo ClassEntity;
    517   const ObjCInterfaceDecl *IFaceD = D->getClassInterface();
    518   SourceLocation ClassLoc = D->getLocation();
    519   SourceLocation CategoryLoc = D->IsClassExtension() ? ClassLoc
    520                                                      : D->getCategoryNameLoc();
    521   getEntityInfo(IFaceD, ClassEntity, SA);
    522 
    523   if (shouldSuppressRefs())
    524     markEntityOccurrenceInFile(IFaceD, ClassLoc);
    525 
    526   ObjCProtocolListInfo ProtInfo(D->getReferencedProtocols(), *this, SA);
    527 
    528   CatDInfo.ObjCCatDeclInfo.containerInfo = &CatDInfo.ObjCContDeclInfo;
    529   if (IFaceD) {
    530     CatDInfo.ObjCCatDeclInfo.objcClass = &ClassEntity;
    531     CatDInfo.ObjCCatDeclInfo.classCursor =
    532         MakeCursorObjCClassRef(IFaceD, ClassLoc, CXTU);
    533   } else {
    534     CatDInfo.ObjCCatDeclInfo.objcClass = 0;
    535     CatDInfo.ObjCCatDeclInfo.classCursor = clang_getNullCursor();
    536   }
    537   CatDInfo.ObjCCatDeclInfo.classLoc = getIndexLoc(ClassLoc);
    538   CatDInfo.ObjCProtoListInfo = ProtInfo.getListInfo();
    539   CatDInfo.ObjCCatDeclInfo.protocols = &CatDInfo.ObjCProtoListInfo;
    540 
    541   return handleObjCContainer(D, CategoryLoc, getCursor(D), CatDInfo);
    542 }
    543 
    544 bool IndexingContext::handleObjCCategoryImpl(const ObjCCategoryImplDecl *D) {
    545   ScratchAlloc SA(*this);
    546 
    547   const ObjCCategoryDecl *CatD = D->getCategoryDecl();
    548   ObjCCategoryDeclInfo CatDInfo(/*isImplementation=*/true);
    549   EntityInfo ClassEntity;
    550   const ObjCInterfaceDecl *IFaceD = CatD->getClassInterface();
    551   SourceLocation ClassLoc = D->getLocation();
    552   SourceLocation CategoryLoc = D->getCategoryNameLoc();
    553   getEntityInfo(IFaceD, ClassEntity, SA);
    554 
    555   if (shouldSuppressRefs())
    556     markEntityOccurrenceInFile(IFaceD, ClassLoc);
    557 
    558   CatDInfo.ObjCCatDeclInfo.containerInfo = &CatDInfo.ObjCContDeclInfo;
    559   if (IFaceD) {
    560     CatDInfo.ObjCCatDeclInfo.objcClass = &ClassEntity;
    561     CatDInfo.ObjCCatDeclInfo.classCursor =
    562         MakeCursorObjCClassRef(IFaceD, ClassLoc, CXTU);
    563   } else {
    564     CatDInfo.ObjCCatDeclInfo.objcClass = 0;
    565     CatDInfo.ObjCCatDeclInfo.classCursor = clang_getNullCursor();
    566   }
    567   CatDInfo.ObjCCatDeclInfo.classLoc = getIndexLoc(ClassLoc);
    568   CatDInfo.ObjCCatDeclInfo.protocols = 0;
    569 
    570   return handleObjCContainer(D, CategoryLoc, getCursor(D), CatDInfo);
    571 }
    572 
    573 bool IndexingContext::handleObjCMethod(const ObjCMethodDecl *D) {
    574   bool isDef = D->isThisDeclarationADefinition();
    575   bool isContainer = isDef;
    576   bool isSkipped = false;
    577   if (D->hasSkippedBody()) {
    578     isSkipped = true;
    579     isDef = true;
    580     isContainer = false;
    581   }
    582 
    583   DeclInfo DInfo(!D->isCanonicalDecl(), isDef, isContainer);
    584   if (isSkipped)
    585     DInfo.flags |= CXIdxDeclFlag_Skipped;
    586   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
    587 }
    588 
    589 bool IndexingContext::handleSynthesizedObjCProperty(
    590                                                 const ObjCPropertyImplDecl *D) {
    591   ObjCPropertyDecl *PD = D->getPropertyDecl();
    592   return handleReference(PD, D->getLocation(), getCursor(D), 0, D->getDeclContext());
    593 }
    594 
    595 bool IndexingContext::handleSynthesizedObjCMethod(const ObjCMethodDecl *D,
    596                                                   SourceLocation Loc,
    597                                                  const DeclContext *LexicalDC) {
    598   DeclInfo DInfo(/*isRedeclaration=*/true, /*isDefinition=*/true,
    599                  /*isContainer=*/false);
    600   return handleDecl(D, Loc, getCursor(D), DInfo, LexicalDC);
    601 }
    602 
    603 bool IndexingContext::handleObjCProperty(const ObjCPropertyDecl *D) {
    604   ScratchAlloc SA(*this);
    605 
    606   ObjCPropertyDeclInfo DInfo;
    607   EntityInfo GetterEntity;
    608   EntityInfo SetterEntity;
    609 
    610   DInfo.ObjCPropDeclInfo.declInfo = &DInfo;
    611 
    612   if (ObjCMethodDecl *Getter = D->getGetterMethodDecl()) {
    613     getEntityInfo(Getter, GetterEntity, SA);
    614     DInfo.ObjCPropDeclInfo.getter = &GetterEntity;
    615   } else {
    616     DInfo.ObjCPropDeclInfo.getter = 0;
    617   }
    618   if (ObjCMethodDecl *Setter = D->getSetterMethodDecl()) {
    619     getEntityInfo(Setter, SetterEntity, SA);
    620     DInfo.ObjCPropDeclInfo.setter = &SetterEntity;
    621   } else {
    622     DInfo.ObjCPropDeclInfo.setter = 0;
    623   }
    624 
    625   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
    626 }
    627 
    628 bool IndexingContext::handleNamespace(const NamespaceDecl *D) {
    629   DeclInfo DInfo(/*isRedeclaration=*/!D->isOriginalNamespace(),
    630                  /*isDefinition=*/true,
    631                  /*isContainer=*/true);
    632   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
    633 }
    634 
    635 bool IndexingContext::handleClassTemplate(const ClassTemplateDecl *D) {
    636   return handleCXXRecordDecl(D->getTemplatedDecl(), D);
    637 }
    638 
    639 bool IndexingContext::handleFunctionTemplate(const FunctionTemplateDecl *D) {
    640   DeclInfo DInfo(/*isRedeclaration=*/!D->isCanonicalDecl(),
    641                  /*isDefinition=*/D->isThisDeclarationADefinition(),
    642                  /*isContainer=*/D->isThisDeclarationADefinition());
    643   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
    644 }
    645 
    646 bool IndexingContext::handleTypeAliasTemplate(const TypeAliasTemplateDecl *D) {
    647   DeclInfo DInfo(/*isRedeclaration=*/!D->isCanonicalDecl(),
    648                  /*isDefinition=*/true, /*isContainer=*/false);
    649   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
    650 }
    651 
    652 bool IndexingContext::handleReference(const NamedDecl *D, SourceLocation Loc,
    653                                       const NamedDecl *Parent,
    654                                       const DeclContext *DC,
    655                                       const Expr *E,
    656                                       CXIdxEntityRefKind Kind) {
    657   if (!D)
    658     return false;
    659 
    660   CXCursor Cursor = E ? MakeCXCursor(E, cast<Decl>(DC), CXTU)
    661                       : getRefCursor(D, Loc);
    662   return handleReference(D, Loc, Cursor, Parent, DC, E, Kind);
    663 }
    664 
    665 bool IndexingContext::handleReference(const NamedDecl *D, SourceLocation Loc,
    666                                       CXCursor Cursor,
    667                                       const NamedDecl *Parent,
    668                                       const DeclContext *DC,
    669                                       const Expr *E,
    670                                       CXIdxEntityRefKind Kind) {
    671   if (!CB.indexEntityReference)
    672     return false;
    673 
    674   if (!D)
    675     return false;
    676   if (Loc.isInvalid())
    677     return false;
    678   if (!shouldIndexFunctionLocalSymbols() && isFunctionLocalDecl(D))
    679     return false;
    680   if (isNotFromSourceFile(D->getLocation()))
    681     return false;
    682   if (D->isImplicit() && shouldIgnoreIfImplicit(D))
    683     return false;
    684 
    685   if (shouldSuppressRefs()) {
    686     if (markEntityOccurrenceInFile(D, Loc))
    687       return false; // already occurred.
    688   }
    689 
    690   ScratchAlloc SA(*this);
    691   EntityInfo RefEntity, ParentEntity;
    692   getEntityInfo(D, RefEntity, SA);
    693   if (!RefEntity.USR)
    694     return false;
    695 
    696   getEntityInfo(Parent, ParentEntity, SA);
    697 
    698   ContainerInfo Container;
    699   getContainerInfo(DC, Container);
    700 
    701   CXIdxEntityRefInfo Info = { Kind,
    702                               Cursor,
    703                               getIndexLoc(Loc),
    704                               &RefEntity,
    705                               Parent ? &ParentEntity : 0,
    706                               &Container };
    707   CB.indexEntityReference(ClientData, &Info);
    708   return true;
    709 }
    710 
    711 bool IndexingContext::isNotFromSourceFile(SourceLocation Loc) const {
    712   if (Loc.isInvalid())
    713     return true;
    714   SourceManager &SM = Ctx->getSourceManager();
    715   SourceLocation FileLoc = SM.getFileLoc(Loc);
    716   FileID FID = SM.getFileID(FileLoc);
    717   return SM.getFileEntryForID(FID) == 0;
    718 }
    719 
    720 void IndexingContext::addContainerInMap(const DeclContext *DC,
    721                                         CXIdxClientContainer container) {
    722   if (!DC)
    723     return;
    724 
    725   ContainerMapTy::iterator I = ContainerMap.find(DC);
    726   if (I == ContainerMap.end()) {
    727     if (container)
    728       ContainerMap[DC] = container;
    729     return;
    730   }
    731   // Allow changing the container of a previously seen DeclContext so we
    732   // can handle invalid user code, like a function re-definition.
    733   if (container)
    734     I->second = container;
    735   else
    736     ContainerMap.erase(I);
    737 }
    738 
    739 CXIdxClientEntity IndexingContext::getClientEntity(const Decl *D) const {
    740   if (!D)
    741     return 0;
    742   EntityMapTy::const_iterator I = EntityMap.find(D);
    743   if (I == EntityMap.end())
    744     return 0;
    745   return I->second;
    746 }
    747 
    748 void IndexingContext::setClientEntity(const Decl *D, CXIdxClientEntity client) {
    749   if (!D)
    750     return;
    751   EntityMap[D] = client;
    752 }
    753 
    754 bool IndexingContext::handleCXXRecordDecl(const CXXRecordDecl *RD,
    755                                           const NamedDecl *OrigD) {
    756   if (RD->isThisDeclarationADefinition()) {
    757     ScratchAlloc SA(*this);
    758     CXXClassDeclInfo CXXDInfo(/*isRedeclaration=*/!OrigD->isCanonicalDecl(),
    759                            /*isDefinition=*/RD->isThisDeclarationADefinition());
    760     CXXBasesListInfo BaseList(RD, *this, SA);
    761     CXXDInfo.CXXClassInfo.declInfo = &CXXDInfo;
    762     CXXDInfo.CXXClassInfo.bases = BaseList.getBases();
    763     CXXDInfo.CXXClassInfo.numBases = BaseList.getNumBases();
    764 
    765     if (shouldSuppressRefs()) {
    766       // Go through bases and mark them as referenced.
    767       for (unsigned i = 0, e = BaseList.getNumBases(); i != e; ++i) {
    768         const CXIdxBaseClassInfo *baseInfo = BaseList.getBases()[i];
    769         if (baseInfo->base) {
    770           const NamedDecl *BaseD = BaseList.BaseEntities[i].Dcl;
    771           SourceLocation
    772             Loc = SourceLocation::getFromRawEncoding(baseInfo->loc.int_data);
    773           markEntityOccurrenceInFile(BaseD, Loc);
    774         }
    775       }
    776     }
    777 
    778     return handleDecl(OrigD, OrigD->getLocation(), getCursor(OrigD), CXXDInfo);
    779   }
    780 
    781   DeclInfo DInfo(/*isRedeclaration=*/!OrigD->isCanonicalDecl(),
    782                  /*isDefinition=*/RD->isThisDeclarationADefinition(),
    783                  /*isContainer=*/RD->isThisDeclarationADefinition());
    784   return handleDecl(OrigD, OrigD->getLocation(), getCursor(OrigD), DInfo);
    785 }
    786 
    787 bool IndexingContext::markEntityOccurrenceInFile(const NamedDecl *D,
    788                                                  SourceLocation Loc) {
    789   if (!D || Loc.isInvalid())
    790     return true;
    791 
    792   SourceManager &SM = Ctx->getSourceManager();
    793   D = getEntityDecl(D);
    794 
    795   std::pair<FileID, unsigned> LocInfo = SM.getDecomposedLoc(SM.getFileLoc(Loc));
    796   FileID FID = LocInfo.first;
    797   if (FID.isInvalid())
    798     return true;
    799 
    800   const FileEntry *FE = SM.getFileEntryForID(FID);
    801   if (!FE)
    802     return true;
    803   RefFileOccurence RefOccur(FE, D);
    804   std::pair<llvm::DenseSet<RefFileOccurence>::iterator, bool>
    805   res = RefFileOccurences.insert(RefOccur);
    806   if (!res.second)
    807     return true; // already in map.
    808 
    809   return false;
    810 }
    811 
    812 const NamedDecl *IndexingContext::getEntityDecl(const NamedDecl *D) const {
    813   assert(D);
    814   D = cast<NamedDecl>(D->getCanonicalDecl());
    815 
    816   if (const ObjCImplementationDecl *
    817                ImplD = dyn_cast<ObjCImplementationDecl>(D)) {
    818     return getEntityDecl(ImplD->getClassInterface());
    819 
    820   } else if (const ObjCCategoryImplDecl *
    821                CatImplD = dyn_cast<ObjCCategoryImplDecl>(D)) {
    822     return getEntityDecl(CatImplD->getCategoryDecl());
    823   } else if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
    824     if (FunctionTemplateDecl *TemplD = FD->getDescribedFunctionTemplate())
    825       return getEntityDecl(TemplD);
    826   } else if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(D)) {
    827     if (ClassTemplateDecl *TemplD = RD->getDescribedClassTemplate())
    828       return getEntityDecl(TemplD);
    829   }
    830 
    831   return D;
    832 }
    833 
    834 const DeclContext *
    835 IndexingContext::getEntityContainer(const Decl *D) const {
    836   const DeclContext *DC = dyn_cast<DeclContext>(D);
    837   if (DC)
    838     return DC;
    839 
    840   if (const ClassTemplateDecl *ClassTempl = dyn_cast<ClassTemplateDecl>(D)) {
    841     DC = ClassTempl->getTemplatedDecl();
    842   } else if (const FunctionTemplateDecl *
    843           FuncTempl = dyn_cast<FunctionTemplateDecl>(D)) {
    844     DC = FuncTempl->getTemplatedDecl();
    845   }
    846 
    847   return DC;
    848 }
    849 
    850 CXIdxClientContainer
    851 IndexingContext::getClientContainerForDC(const DeclContext *DC) const {
    852   if (!DC)
    853     return 0;
    854 
    855   ContainerMapTy::const_iterator I = ContainerMap.find(DC);
    856   if (I == ContainerMap.end())
    857     return 0;
    858 
    859   return I->second;
    860 }
    861 
    862 CXIdxClientFile IndexingContext::getIndexFile(const FileEntry *File) {
    863   if (!File)
    864     return 0;
    865 
    866   FileMapTy::iterator FI = FileMap.find(File);
    867   if (FI != FileMap.end())
    868     return FI->second;
    869 
    870   return 0;
    871 }
    872 
    873 CXIdxLoc IndexingContext::getIndexLoc(SourceLocation Loc) const {
    874   CXIdxLoc idxLoc =  { {0, 0}, 0 };
    875   if (Loc.isInvalid())
    876     return idxLoc;
    877 
    878   idxLoc.ptr_data[0] = const_cast<IndexingContext *>(this);
    879   idxLoc.int_data = Loc.getRawEncoding();
    880   return idxLoc;
    881 }
    882 
    883 void IndexingContext::translateLoc(SourceLocation Loc,
    884                                    CXIdxClientFile *indexFile, CXFile *file,
    885                                    unsigned *line, unsigned *column,
    886                                    unsigned *offset) {
    887   if (Loc.isInvalid())
    888     return;
    889 
    890   SourceManager &SM = Ctx->getSourceManager();
    891   Loc = SM.getFileLoc(Loc);
    892 
    893   std::pair<FileID, unsigned> LocInfo = SM.getDecomposedLoc(Loc);
    894   FileID FID = LocInfo.first;
    895   unsigned FileOffset = LocInfo.second;
    896 
    897   if (FID.isInvalid())
    898     return;
    899 
    900   const FileEntry *FE = SM.getFileEntryForID(FID);
    901   if (indexFile)
    902     *indexFile = getIndexFile(FE);
    903   if (file)
    904     *file = const_cast<FileEntry *>(FE);
    905   if (line)
    906     *line = SM.getLineNumber(FID, FileOffset);
    907   if (column)
    908     *column = SM.getColumnNumber(FID, FileOffset);
    909   if (offset)
    910     *offset = FileOffset;
    911 }
    912 
    913 void IndexingContext::getEntityInfo(const NamedDecl *D,
    914                                     EntityInfo &EntityInfo,
    915                                     ScratchAlloc &SA) {
    916   if (!D)
    917     return;
    918 
    919   D = getEntityDecl(D);
    920   EntityInfo.cursor = getCursor(D);
    921   EntityInfo.Dcl = D;
    922   EntityInfo.IndexCtx = this;
    923   EntityInfo.kind = CXIdxEntity_Unexposed;
    924   EntityInfo.templateKind = CXIdxEntity_NonTemplate;
    925   EntityInfo.lang = CXIdxEntityLang_C;
    926 
    927   if (D->hasAttrs()) {
    928     EntityInfo.AttrList = AttrListInfo::create(D, *this);
    929     EntityInfo.attributes = EntityInfo.AttrList->getAttrs();
    930     EntityInfo.numAttributes = EntityInfo.AttrList->getNumAttrs();
    931   }
    932 
    933   if (const TagDecl *TD = dyn_cast<TagDecl>(D)) {
    934     switch (TD->getTagKind()) {
    935     case TTK_Struct:
    936       EntityInfo.kind = CXIdxEntity_Struct; break;
    937     case TTK_Union:
    938       EntityInfo.kind = CXIdxEntity_Union; break;
    939     case TTK_Class:
    940       EntityInfo.kind = CXIdxEntity_CXXClass;
    941       EntityInfo.lang = CXIdxEntityLang_CXX;
    942       break;
    943     case TTK_Interface:
    944       EntityInfo.kind = CXIdxEntity_CXXInterface;
    945       EntityInfo.lang = CXIdxEntityLang_CXX;
    946       break;
    947     case TTK_Enum:
    948       EntityInfo.kind = CXIdxEntity_Enum; break;
    949     }
    950 
    951     if (const CXXRecordDecl *CXXRec = dyn_cast<CXXRecordDecl>(D))
    952       if (!CXXRec->isCLike())
    953         EntityInfo.lang = CXIdxEntityLang_CXX;
    954 
    955     if (isa<ClassTemplatePartialSpecializationDecl>(D)) {
    956       EntityInfo.templateKind = CXIdxEntity_TemplatePartialSpecialization;
    957     } else if (isa<ClassTemplateSpecializationDecl>(D)) {
    958       EntityInfo.templateKind = CXIdxEntity_TemplateSpecialization;
    959     }
    960 
    961   } else {
    962     switch (D->getKind()) {
    963     case Decl::Typedef:
    964       EntityInfo.kind = CXIdxEntity_Typedef; break;
    965     case Decl::Function:
    966       EntityInfo.kind = CXIdxEntity_Function;
    967       break;
    968     case Decl::ParmVar:
    969       EntityInfo.kind = CXIdxEntity_Variable;
    970       break;
    971     case Decl::Var:
    972       EntityInfo.kind = CXIdxEntity_Variable;
    973       if (isa<CXXRecordDecl>(D->getDeclContext())) {
    974         EntityInfo.kind = CXIdxEntity_CXXStaticVariable;
    975         EntityInfo.lang = CXIdxEntityLang_CXX;
    976       }
    977       break;
    978     case Decl::Field:
    979       EntityInfo.kind = CXIdxEntity_Field;
    980       if (const CXXRecordDecl *
    981             CXXRec = dyn_cast<CXXRecordDecl>(D->getDeclContext())) {
    982         // FIXME: isPOD check is not sufficient, a POD can contain methods,
    983         // we want a isCStructLike check.
    984         if (!CXXRec->isPOD())
    985           EntityInfo.lang = CXIdxEntityLang_CXX;
    986       }
    987       break;
    988     case Decl::EnumConstant:
    989       EntityInfo.kind = CXIdxEntity_EnumConstant; break;
    990     case Decl::ObjCInterface:
    991       EntityInfo.kind = CXIdxEntity_ObjCClass;
    992       EntityInfo.lang = CXIdxEntityLang_ObjC;
    993       break;
    994     case Decl::ObjCProtocol:
    995       EntityInfo.kind = CXIdxEntity_ObjCProtocol;
    996       EntityInfo.lang = CXIdxEntityLang_ObjC;
    997       break;
    998     case Decl::ObjCCategory:
    999       EntityInfo.kind = CXIdxEntity_ObjCCategory;
   1000       EntityInfo.lang = CXIdxEntityLang_ObjC;
   1001       break;
   1002     case Decl::ObjCMethod:
   1003       if (cast<ObjCMethodDecl>(D)->isInstanceMethod())
   1004         EntityInfo.kind = CXIdxEntity_ObjCInstanceMethod;
   1005       else
   1006         EntityInfo.kind = CXIdxEntity_ObjCClassMethod;
   1007       EntityInfo.lang = CXIdxEntityLang_ObjC;
   1008       break;
   1009     case Decl::ObjCProperty:
   1010       EntityInfo.kind = CXIdxEntity_ObjCProperty;
   1011       EntityInfo.lang = CXIdxEntityLang_ObjC;
   1012       break;
   1013     case Decl::ObjCIvar:
   1014       EntityInfo.kind = CXIdxEntity_ObjCIvar;
   1015       EntityInfo.lang = CXIdxEntityLang_ObjC;
   1016       break;
   1017     case Decl::Namespace:
   1018       EntityInfo.kind = CXIdxEntity_CXXNamespace;
   1019       EntityInfo.lang = CXIdxEntityLang_CXX;
   1020       break;
   1021     case Decl::NamespaceAlias:
   1022       EntityInfo.kind = CXIdxEntity_CXXNamespaceAlias;
   1023       EntityInfo.lang = CXIdxEntityLang_CXX;
   1024       break;
   1025     case Decl::CXXConstructor:
   1026       EntityInfo.kind = CXIdxEntity_CXXConstructor;
   1027       EntityInfo.lang = CXIdxEntityLang_CXX;
   1028       break;
   1029     case Decl::CXXDestructor:
   1030       EntityInfo.kind = CXIdxEntity_CXXDestructor;
   1031       EntityInfo.lang = CXIdxEntityLang_CXX;
   1032       break;
   1033     case Decl::CXXConversion:
   1034       EntityInfo.kind = CXIdxEntity_CXXConversionFunction;
   1035       EntityInfo.lang = CXIdxEntityLang_CXX;
   1036       break;
   1037     case Decl::CXXMethod: {
   1038       const CXXMethodDecl *MD = cast<CXXMethodDecl>(D);
   1039       if (MD->isStatic())
   1040         EntityInfo.kind = CXIdxEntity_CXXStaticMethod;
   1041       else
   1042         EntityInfo.kind = CXIdxEntity_CXXInstanceMethod;
   1043       EntityInfo.lang = CXIdxEntityLang_CXX;
   1044       break;
   1045     }
   1046     case Decl::ClassTemplate:
   1047       EntityInfo.kind = CXIdxEntity_CXXClass;
   1048       EntityInfo.templateKind = CXIdxEntity_Template;
   1049       break;
   1050     case Decl::FunctionTemplate:
   1051       EntityInfo.kind = CXIdxEntity_Function;
   1052       EntityInfo.templateKind = CXIdxEntity_Template;
   1053       if (const CXXMethodDecl *MD = dyn_cast_or_null<CXXMethodDecl>(
   1054                            cast<FunctionTemplateDecl>(D)->getTemplatedDecl())) {
   1055         if (isa<CXXConstructorDecl>(MD))
   1056           EntityInfo.kind = CXIdxEntity_CXXConstructor;
   1057         else if (isa<CXXDestructorDecl>(MD))
   1058           EntityInfo.kind = CXIdxEntity_CXXDestructor;
   1059         else if (isa<CXXConversionDecl>(MD))
   1060           EntityInfo.kind = CXIdxEntity_CXXConversionFunction;
   1061         else {
   1062           if (MD->isStatic())
   1063             EntityInfo.kind = CXIdxEntity_CXXStaticMethod;
   1064           else
   1065             EntityInfo.kind = CXIdxEntity_CXXInstanceMethod;
   1066         }
   1067       }
   1068       break;
   1069     case Decl::TypeAliasTemplate:
   1070       EntityInfo.kind = CXIdxEntity_CXXTypeAlias;
   1071       EntityInfo.templateKind = CXIdxEntity_Template;
   1072       break;
   1073     case Decl::TypeAlias:
   1074       EntityInfo.kind = CXIdxEntity_CXXTypeAlias;
   1075       EntityInfo.lang = CXIdxEntityLang_CXX;
   1076       break;
   1077     default:
   1078       break;
   1079     }
   1080   }
   1081 
   1082   if (EntityInfo.kind == CXIdxEntity_Unexposed)
   1083     return;
   1084 
   1085   if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
   1086     if (FD->getTemplatedKind() ==
   1087           FunctionDecl::TK_FunctionTemplateSpecialization)
   1088       EntityInfo.templateKind = CXIdxEntity_TemplateSpecialization;
   1089   }
   1090 
   1091   if (EntityInfo.templateKind != CXIdxEntity_NonTemplate)
   1092     EntityInfo.lang = CXIdxEntityLang_CXX;
   1093 
   1094   if (IdentifierInfo *II = D->getIdentifier()) {
   1095     EntityInfo.name = SA.toCStr(II->getName());
   1096 
   1097   } else if (isa<TagDecl>(D) || isa<FieldDecl>(D) || isa<NamespaceDecl>(D)) {
   1098     EntityInfo.name = 0; // anonymous tag/field/namespace.
   1099 
   1100   } else {
   1101     SmallString<256> StrBuf;
   1102     {
   1103       llvm::raw_svector_ostream OS(StrBuf);
   1104       D->printName(OS);
   1105     }
   1106     EntityInfo.name = SA.copyCStr(StrBuf.str());
   1107   }
   1108 
   1109   {
   1110     SmallString<512> StrBuf;
   1111     bool Ignore = getDeclCursorUSR(D, StrBuf);
   1112     if (Ignore) {
   1113       EntityInfo.USR = 0;
   1114     } else {
   1115       EntityInfo.USR = SA.copyCStr(StrBuf.str());
   1116     }
   1117   }
   1118 }
   1119 
   1120 void IndexingContext::getContainerInfo(const DeclContext *DC,
   1121                                        ContainerInfo &ContInfo) {
   1122   ContInfo.cursor = getCursor(cast<Decl>(DC));
   1123   ContInfo.DC = DC;
   1124   ContInfo.IndexCtx = this;
   1125 }
   1126 
   1127 CXCursor IndexingContext::getRefCursor(const NamedDecl *D, SourceLocation Loc) {
   1128   if (const TypeDecl *TD = dyn_cast<TypeDecl>(D))
   1129     return MakeCursorTypeRef(TD, Loc, CXTU);
   1130   if (const ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(D))
   1131     return MakeCursorObjCClassRef(ID, Loc, CXTU);
   1132   if (const ObjCProtocolDecl *PD = dyn_cast<ObjCProtocolDecl>(D))
   1133     return MakeCursorObjCProtocolRef(PD, Loc, CXTU);
   1134   if (const TemplateDecl *Template = dyn_cast<TemplateDecl>(D))
   1135     return MakeCursorTemplateRef(Template, Loc, CXTU);
   1136   if (const NamespaceDecl *Namespace = dyn_cast<NamespaceDecl>(D))
   1137     return MakeCursorNamespaceRef(Namespace, Loc, CXTU);
   1138   if (const NamespaceAliasDecl *Namespace = dyn_cast<NamespaceAliasDecl>(D))
   1139     return MakeCursorNamespaceRef(Namespace, Loc, CXTU);
   1140   if (const FieldDecl *Field = dyn_cast<FieldDecl>(D))
   1141     return MakeCursorMemberRef(Field, Loc, CXTU);
   1142   if (const VarDecl *Var = dyn_cast<VarDecl>(D))
   1143     return MakeCursorVariableRef(Var, Loc, CXTU);
   1144 
   1145   return clang_getNullCursor();
   1146 }
   1147 
   1148 bool IndexingContext::shouldIgnoreIfImplicit(const Decl *D) {
   1149   if (isa<ObjCInterfaceDecl>(D))
   1150     return false;
   1151   if (isa<ObjCCategoryDecl>(D))
   1152     return false;
   1153   if (isa<ObjCIvarDecl>(D))
   1154     return false;
   1155   if (isa<ObjCMethodDecl>(D))
   1156     return false;
   1157   if (isa<ImportDecl>(D))
   1158     return false;
   1159   return true;
   1160 }
   1161 
   1162 bool IndexingContext::isTemplateImplicitInstantiation(const Decl *D) {
   1163   if (const ClassTemplateSpecializationDecl *
   1164         SD = dyn_cast<ClassTemplateSpecializationDecl>(D)) {
   1165     return SD->getSpecializationKind() == TSK_ImplicitInstantiation;
   1166   }
   1167   if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
   1168     return FD->getTemplateSpecializationKind() == TSK_ImplicitInstantiation;
   1169   }
   1170   return false;
   1171 }
   1172