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/Attr.h"
14 #include "clang/AST/DeclCXX.h"
15 #include "clang/AST/DeclTemplate.h"
16 #include "clang/Frontend/ASTUnit.h"
17 
18 using namespace clang;
19 using namespace cxindex;
20 using namespace cxcursor;
21 
ObjCProtocolListInfo(const ObjCProtocolList & ProtList,IndexingContext & IdxCtx,ScratchAlloc & SA)22 IndexingContext::ObjCProtocolListInfo::ObjCProtocolListInfo(
23                                     const ObjCProtocolList &ProtList,
24                                     IndexingContext &IdxCtx,
25                                     ScratchAlloc &SA) {
26   ObjCInterfaceDecl::protocol_loc_iterator LI = ProtList.loc_begin();
27   for (ObjCInterfaceDecl::protocol_iterator
28          I = ProtList.begin(), E = ProtList.end(); I != E; ++I, ++LI) {
29     SourceLocation Loc = *LI;
30     ObjCProtocolDecl *PD = *I;
31     ProtEntities.push_back(EntityInfo());
32     IdxCtx.getEntityInfo(PD, ProtEntities.back(), SA);
33     CXIdxObjCProtocolRefInfo ProtInfo = { nullptr,
34                                 MakeCursorObjCProtocolRef(PD, Loc, IdxCtx.CXTU),
35                                 IdxCtx.getIndexLoc(Loc) };
36     ProtInfos.push_back(ProtInfo);
37 
38     if (IdxCtx.shouldSuppressRefs())
39       IdxCtx.markEntityOccurrenceInFile(PD, Loc);
40   }
41 
42   for (unsigned i = 0, e = ProtInfos.size(); i != e; ++i)
43     ProtInfos[i].protocol = &ProtEntities[i];
44 
45   for (unsigned i = 0, e = ProtInfos.size(); i != e; ++i)
46     Prots.push_back(&ProtInfos[i]);
47 }
48 
49 
IBOutletCollectionInfo(const IBOutletCollectionInfo & other)50 IBOutletCollectionInfo::IBOutletCollectionInfo(
51                                           const IBOutletCollectionInfo &other)
52   : AttrInfo(CXIdxAttr_IBOutletCollection, other.cursor, other.loc, other.A) {
53 
54   IBCollInfo.attrInfo = this;
55   IBCollInfo.classCursor = other.IBCollInfo.classCursor;
56   IBCollInfo.classLoc = other.IBCollInfo.classLoc;
57   if (other.IBCollInfo.objcClass) {
58     ClassInfo = other.ClassInfo;
59     IBCollInfo.objcClass = &ClassInfo;
60   } else
61     IBCollInfo.objcClass = nullptr;
62 }
63 
AttrListInfo(const Decl * D,IndexingContext & IdxCtx)64 AttrListInfo::AttrListInfo(const Decl *D, IndexingContext &IdxCtx)
65   : SA(IdxCtx), ref_cnt(0) {
66 
67   if (!D->hasAttrs())
68     return;
69 
70   for (const auto *A : D->attrs()) {
71     CXCursor C = MakeCXCursor(A, D, IdxCtx.CXTU);
72     CXIdxLoc Loc =  IdxCtx.getIndexLoc(A->getLocation());
73     switch (C.kind) {
74     default:
75       Attrs.push_back(AttrInfo(CXIdxAttr_Unexposed, C, Loc, A));
76       break;
77     case CXCursor_IBActionAttr:
78       Attrs.push_back(AttrInfo(CXIdxAttr_IBAction, C, Loc, A));
79       break;
80     case CXCursor_IBOutletAttr:
81       Attrs.push_back(AttrInfo(CXIdxAttr_IBOutlet, C, Loc, A));
82       break;
83     case CXCursor_IBOutletCollectionAttr:
84       IBCollAttrs.push_back(IBOutletCollectionInfo(C, Loc, A));
85       break;
86     }
87   }
88 
89   for (unsigned i = 0, e = IBCollAttrs.size(); i != e; ++i) {
90     IBOutletCollectionInfo &IBInfo = IBCollAttrs[i];
91     CXAttrs.push_back(&IBInfo);
92 
93     const IBOutletCollectionAttr *
94       IBAttr = cast<IBOutletCollectionAttr>(IBInfo.A);
95     SourceLocation InterfaceLocStart =
96         IBAttr->getInterfaceLoc()->getTypeLoc().getLocStart();
97     IBInfo.IBCollInfo.attrInfo = &IBInfo;
98     IBInfo.IBCollInfo.classLoc = IdxCtx.getIndexLoc(InterfaceLocStart);
99     IBInfo.IBCollInfo.objcClass = nullptr;
100     IBInfo.IBCollInfo.classCursor = clang_getNullCursor();
101     QualType Ty = IBAttr->getInterface();
102     if (const ObjCObjectType *ObjectTy = Ty->getAs<ObjCObjectType>()) {
103       if (const ObjCInterfaceDecl *InterD = ObjectTy->getInterface()) {
104         IdxCtx.getEntityInfo(InterD, IBInfo.ClassInfo, SA);
105         IBInfo.IBCollInfo.objcClass = &IBInfo.ClassInfo;
106         IBInfo.IBCollInfo.classCursor =
107             MakeCursorObjCClassRef(InterD, InterfaceLocStart, IdxCtx.CXTU);
108       }
109     }
110   }
111 
112   for (unsigned i = 0, e = Attrs.size(); i != e; ++i)
113     CXAttrs.push_back(&Attrs[i]);
114 }
115 
116 IntrusiveRefCntPtr<AttrListInfo>
create(const Decl * D,IndexingContext & IdxCtx)117 AttrListInfo::create(const Decl *D, IndexingContext &IdxCtx) {
118   ScratchAlloc SA(IdxCtx);
119   AttrListInfo *attrs = SA.allocate<AttrListInfo>();
120   return new (attrs) AttrListInfo(D, IdxCtx);
121 }
122 
CXXBasesListInfo(const CXXRecordDecl * D,IndexingContext & IdxCtx,ScratchAlloc & SA)123 IndexingContext::CXXBasesListInfo::CXXBasesListInfo(const CXXRecordDecl *D,
124                                    IndexingContext &IdxCtx,
125                                    ScratchAlloc &SA) {
126   for (const auto &Base : D->bases()) {
127     BaseEntities.push_back(EntityInfo());
128     const NamedDecl *BaseD = nullptr;
129     QualType T = Base.getType();
130     SourceLocation Loc = getBaseLoc(Base);
131 
132     if (const TypedefType *TDT = T->getAs<TypedefType>()) {
133       BaseD = TDT->getDecl();
134     } else if (const TemplateSpecializationType *
135           TST = T->getAs<TemplateSpecializationType>()) {
136       BaseD = TST->getTemplateName().getAsTemplateDecl();
137     } else if (const RecordType *RT = T->getAs<RecordType>()) {
138       BaseD = RT->getDecl();
139     }
140 
141     if (BaseD)
142       IdxCtx.getEntityInfo(BaseD, BaseEntities.back(), SA);
143     CXIdxBaseClassInfo BaseInfo = { nullptr,
144                          MakeCursorCXXBaseSpecifier(&Base, IdxCtx.CXTU),
145                          IdxCtx.getIndexLoc(Loc) };
146     BaseInfos.push_back(BaseInfo);
147   }
148 
149   for (unsigned i = 0, e = BaseInfos.size(); i != e; ++i) {
150     if (BaseEntities[i].name && BaseEntities[i].USR)
151       BaseInfos[i].base = &BaseEntities[i];
152   }
153 
154   for (unsigned i = 0, e = BaseInfos.size(); i != e; ++i)
155     CXBases.push_back(&BaseInfos[i]);
156 }
157 
getBaseLoc(const CXXBaseSpecifier & Base) const158 SourceLocation IndexingContext::CXXBasesListInfo::getBaseLoc(
159                                            const CXXBaseSpecifier &Base) const {
160   SourceLocation Loc = Base.getSourceRange().getBegin();
161   TypeLoc TL;
162   if (Base.getTypeSourceInfo())
163     TL = Base.getTypeSourceInfo()->getTypeLoc();
164   if (TL.isNull())
165     return Loc;
166 
167   if (QualifiedTypeLoc QL = TL.getAs<QualifiedTypeLoc>())
168     TL = QL.getUnqualifiedLoc();
169 
170   if (ElaboratedTypeLoc EL = TL.getAs<ElaboratedTypeLoc>())
171     return EL.getNamedTypeLoc().getBeginLoc();
172   if (DependentNameTypeLoc DL = TL.getAs<DependentNameTypeLoc>())
173     return DL.getNameLoc();
174   if (DependentTemplateSpecializationTypeLoc DTL =
175           TL.getAs<DependentTemplateSpecializationTypeLoc>())
176     return DTL.getTemplateNameLoc();
177 
178   return Loc;
179 }
180 
toCStr(StringRef Str)181 const char *ScratchAlloc::toCStr(StringRef Str) {
182   if (Str.empty())
183     return "";
184   if (Str.data()[Str.size()] == '\0')
185     return Str.data();
186   return copyCStr(Str);
187 }
188 
copyCStr(StringRef Str)189 const char *ScratchAlloc::copyCStr(StringRef Str) {
190   char *buf = IdxCtx.StrScratch.Allocate<char>(Str.size() + 1);
191   std::uninitialized_copy(Str.begin(), Str.end(), buf);
192   buf[Str.size()] = '\0';
193   return buf;
194 }
195 
setASTContext(ASTContext & ctx)196 void IndexingContext::setASTContext(ASTContext &ctx) {
197   Ctx = &ctx;
198   cxtu::getASTUnit(CXTU)->setASTContext(&ctx);
199 }
200 
setPreprocessor(Preprocessor & PP)201 void IndexingContext::setPreprocessor(Preprocessor &PP) {
202   cxtu::getASTUnit(CXTU)->setPreprocessor(&PP);
203 }
204 
isFunctionLocalDecl(const Decl * D)205 bool IndexingContext::isFunctionLocalDecl(const Decl *D) {
206   assert(D);
207 
208   if (!D->getParentFunctionOrMethod())
209     return false;
210 
211   if (const NamedDecl *ND = dyn_cast<NamedDecl>(D)) {
212     switch (ND->getFormalLinkage()) {
213     case NoLinkage:
214     case VisibleNoLinkage:
215     case InternalLinkage:
216       return true;
217     case UniqueExternalLinkage:
218       llvm_unreachable("Not a sema linkage");
219     case ExternalLinkage:
220       return false;
221     }
222   }
223 
224   return true;
225 }
226 
shouldAbort()227 bool IndexingContext::shouldAbort() {
228   if (!CB.abortQuery)
229     return false;
230   return CB.abortQuery(ClientData, nullptr);
231 }
232 
enteredMainFile(const FileEntry * File)233 void IndexingContext::enteredMainFile(const FileEntry *File) {
234   if (File && CB.enteredMainFile) {
235     CXIdxClientFile idxFile =
236       CB.enteredMainFile(ClientData,
237                          static_cast<CXFile>(const_cast<FileEntry *>(File)),
238                          nullptr);
239     FileMap[File] = idxFile;
240   }
241 }
242 
ppIncludedFile(SourceLocation hashLoc,StringRef filename,const FileEntry * File,bool isImport,bool isAngled,bool isModuleImport)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 
importedModule(const ImportDecl * ImportD)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 
269   CXIdxImportedASTFileInfo Info = {
270                                     static_cast<CXFile>(
271                                     const_cast<FileEntry *>(Mod->getASTFile())),
272                                     Mod,
273                                     getIndexLoc(ImportD->getLocation()),
274                                     ImportD->isImplicit()
275                                   };
276   CXIdxClientASTFile astFile = CB.importedASTFile(ClientData, &Info);
277   (void)astFile;
278 }
279 
importedPCH(const FileEntry * File)280 void IndexingContext::importedPCH(const FileEntry *File) {
281   if (!CB.importedASTFile)
282     return;
283 
284   CXIdxImportedASTFileInfo Info = {
285                                     static_cast<CXFile>(
286                                       const_cast<FileEntry *>(File)),
287                                     /*module=*/nullptr,
288                                     getIndexLoc(SourceLocation()),
289                                     /*isImplicit=*/false
290                                   };
291   CXIdxClientASTFile astFile = CB.importedASTFile(ClientData, &Info);
292   (void)astFile;
293 }
294 
startedTranslationUnit()295 void IndexingContext::startedTranslationUnit() {
296   CXIdxClientContainer idxCont = nullptr;
297   if (CB.startedTranslationUnit)
298     idxCont = CB.startedTranslationUnit(ClientData, nullptr);
299   addContainerInMap(Ctx->getTranslationUnitDecl(), idxCont);
300 }
301 
handleDiagnosticSet(CXDiagnostic CXDiagSet)302 void IndexingContext::handleDiagnosticSet(CXDiagnostic CXDiagSet) {
303   if (!CB.diagnostic)
304     return;
305 
306   CB.diagnostic(ClientData, CXDiagSet, nullptr);
307 }
308 
handleDecl(const NamedDecl * D,SourceLocation Loc,CXCursor Cursor,DeclInfo & DInfo,const DeclContext * LexicalDC)309 bool IndexingContext::handleDecl(const NamedDecl *D,
310                                  SourceLocation Loc, CXCursor Cursor,
311                                  DeclInfo &DInfo,
312                                  const DeclContext *LexicalDC) {
313   if (!CB.indexDeclaration || !D)
314     return false;
315   if (D->isImplicit() && shouldIgnoreIfImplicit(D))
316     return false;
317 
318   ScratchAlloc SA(*this);
319   getEntityInfo(D, DInfo.EntInfo, SA);
320   if ((!shouldIndexFunctionLocalSymbols() && !DInfo.EntInfo.USR)
321       || Loc.isInvalid())
322     return false;
323 
324   if (!LexicalDC)
325     LexicalDC = D->getLexicalDeclContext();
326 
327   if (shouldSuppressRefs())
328     markEntityOccurrenceInFile(D, Loc);
329 
330   DInfo.entityInfo = &DInfo.EntInfo;
331   DInfo.cursor = Cursor;
332   DInfo.loc = getIndexLoc(Loc);
333   DInfo.isImplicit = D->isImplicit();
334 
335   DInfo.attributes = DInfo.EntInfo.attributes;
336   DInfo.numAttributes = DInfo.EntInfo.numAttributes;
337 
338   getContainerInfo(D->getDeclContext(), DInfo.SemanticContainer);
339   DInfo.semanticContainer = &DInfo.SemanticContainer;
340 
341   if (LexicalDC == D->getDeclContext()) {
342     DInfo.lexicalContainer = &DInfo.SemanticContainer;
343   } else if (isTemplateImplicitInstantiation(D)) {
344     // Implicit instantiations have the lexical context of where they were
345     // instantiated first. We choose instead the semantic context because:
346     // 1) at the time that we see the instantiation we have not seen the
347     //   function where it occurred yet.
348     // 2) the lexical context of the first instantiation is not useful
349     //   information anyway.
350     DInfo.lexicalContainer = &DInfo.SemanticContainer;
351   } else {
352     getContainerInfo(LexicalDC, DInfo.LexicalContainer);
353     DInfo.lexicalContainer = &DInfo.LexicalContainer;
354   }
355 
356   if (DInfo.isContainer) {
357     getContainerInfo(getEntityContainer(D), DInfo.DeclAsContainer);
358     DInfo.declAsContainer = &DInfo.DeclAsContainer;
359   }
360 
361   CB.indexDeclaration(ClientData, &DInfo);
362   return true;
363 }
364 
handleObjCContainer(const ObjCContainerDecl * D,SourceLocation Loc,CXCursor Cursor,ObjCContainerDeclInfo & ContDInfo)365 bool IndexingContext::handleObjCContainer(const ObjCContainerDecl *D,
366                                           SourceLocation Loc, CXCursor Cursor,
367                                           ObjCContainerDeclInfo &ContDInfo) {
368   ContDInfo.ObjCContDeclInfo.declInfo = &ContDInfo;
369   return handleDecl(D, Loc, Cursor, ContDInfo);
370 }
371 
handleFunction(const FunctionDecl * D)372 bool IndexingContext::handleFunction(const FunctionDecl *D) {
373   bool isDef = D->isThisDeclarationADefinition();
374   bool isContainer = isDef;
375   bool isSkipped = false;
376   if (D->hasSkippedBody()) {
377     isSkipped = true;
378     isDef = true;
379     isContainer = false;
380   }
381 
382   DeclInfo DInfo(!D->isFirstDecl(), isDef, isContainer);
383   if (isSkipped)
384     DInfo.flags |= CXIdxDeclFlag_Skipped;
385   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
386 }
387 
handleVar(const VarDecl * D)388 bool IndexingContext::handleVar(const VarDecl *D) {
389   DeclInfo DInfo(!D->isFirstDecl(), D->isThisDeclarationADefinition(),
390                  /*isContainer=*/false);
391   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
392 }
393 
handleField(const FieldDecl * D)394 bool IndexingContext::handleField(const FieldDecl *D) {
395   DeclInfo DInfo(/*isRedeclaration=*/false, /*isDefinition=*/true,
396                  /*isContainer=*/false);
397   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
398 }
399 
handleMSProperty(const MSPropertyDecl * D)400 bool IndexingContext::handleMSProperty(const MSPropertyDecl *D) {
401   DeclInfo DInfo(/*isRedeclaration=*/false, /*isDefinition=*/true,
402                  /*isContainer=*/false);
403   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
404 }
405 
handleEnumerator(const EnumConstantDecl * D)406 bool IndexingContext::handleEnumerator(const EnumConstantDecl *D) {
407   DeclInfo DInfo(/*isRedeclaration=*/false, /*isDefinition=*/true,
408                  /*isContainer=*/false);
409   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
410 }
411 
handleTagDecl(const TagDecl * D)412 bool IndexingContext::handleTagDecl(const TagDecl *D) {
413   if (const CXXRecordDecl *CXXRD = dyn_cast<CXXRecordDecl>(D))
414     return handleCXXRecordDecl(CXXRD, D);
415 
416   DeclInfo DInfo(!D->isFirstDecl(), D->isThisDeclarationADefinition(),
417                  D->isThisDeclarationADefinition());
418   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
419 }
420 
handleTypedefName(const TypedefNameDecl * D)421 bool IndexingContext::handleTypedefName(const TypedefNameDecl *D) {
422   DeclInfo DInfo(!D->isFirstDecl(), /*isDefinition=*/true,
423                  /*isContainer=*/false);
424   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
425 }
426 
handleObjCInterface(const ObjCInterfaceDecl * D)427 bool IndexingContext::handleObjCInterface(const ObjCInterfaceDecl *D) {
428   // For @class forward declarations, suppress them the same way as references.
429   if (!D->isThisDeclarationADefinition()) {
430     if (shouldSuppressRefs() && markEntityOccurrenceInFile(D, D->getLocation()))
431       return false; // already occurred.
432 
433     // FIXME: This seems like the wrong definition for redeclaration.
434     bool isRedeclaration = D->hasDefinition() || D->getPreviousDecl();
435     ObjCContainerDeclInfo ContDInfo(/*isForwardRef=*/true, isRedeclaration,
436                                     /*isImplementation=*/false);
437     return handleObjCContainer(D, D->getLocation(),
438                                MakeCursorObjCClassRef(D, D->getLocation(),
439                                                       CXTU),
440                                ContDInfo);
441   }
442 
443   ScratchAlloc SA(*this);
444 
445   CXIdxBaseClassInfo BaseClass;
446   EntityInfo BaseEntity;
447   BaseClass.cursor = clang_getNullCursor();
448   if (ObjCInterfaceDecl *SuperD = D->getSuperClass()) {
449     getEntityInfo(SuperD, BaseEntity, SA);
450     SourceLocation SuperLoc = D->getSuperClassLoc();
451     BaseClass.base = &BaseEntity;
452     BaseClass.cursor = MakeCursorObjCSuperClassRef(SuperD, SuperLoc, CXTU);
453     BaseClass.loc = getIndexLoc(SuperLoc);
454 
455     if (shouldSuppressRefs())
456       markEntityOccurrenceInFile(SuperD, SuperLoc);
457   }
458 
459   ObjCProtocolList EmptyProtoList;
460   ObjCProtocolListInfo ProtInfo(D->isThisDeclarationADefinition()
461                                   ? D->getReferencedProtocols()
462                                   : EmptyProtoList,
463                                 *this, SA);
464 
465   ObjCInterfaceDeclInfo InterInfo(D);
466   InterInfo.ObjCProtoListInfo = ProtInfo.getListInfo();
467   InterInfo.ObjCInterDeclInfo.containerInfo = &InterInfo.ObjCContDeclInfo;
468   InterInfo.ObjCInterDeclInfo.superInfo = D->getSuperClass() ? &BaseClass
469                                                              : nullptr;
470   InterInfo.ObjCInterDeclInfo.protocols = &InterInfo.ObjCProtoListInfo;
471 
472   return handleObjCContainer(D, D->getLocation(), getCursor(D), InterInfo);
473 }
474 
handleObjCImplementation(const ObjCImplementationDecl * D)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 
handleObjCProtocol(const ObjCProtocolDecl * D)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 
handleObjCCategory(const ObjCCategoryDecl * D)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 = nullptr;
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 
handleObjCCategoryImpl(const ObjCCategoryImplDecl * D)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 = nullptr;
565     CatDInfo.ObjCCatDeclInfo.classCursor = clang_getNullCursor();
566   }
567   CatDInfo.ObjCCatDeclInfo.classLoc = getIndexLoc(ClassLoc);
568   CatDInfo.ObjCCatDeclInfo.protocols = nullptr;
569 
570   return handleObjCContainer(D, CategoryLoc, getCursor(D), CatDInfo);
571 }
572 
handleObjCMethod(const ObjCMethodDecl * D)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 
handleSynthesizedObjCProperty(const ObjCPropertyImplDecl * D)589 bool IndexingContext::handleSynthesizedObjCProperty(
590                                                 const ObjCPropertyImplDecl *D) {
591   ObjCPropertyDecl *PD = D->getPropertyDecl();
592   return handleReference(PD, D->getLocation(), getCursor(D), nullptr,
593                          D->getDeclContext());
594 }
595 
handleSynthesizedObjCMethod(const ObjCMethodDecl * D,SourceLocation Loc,const DeclContext * LexicalDC)596 bool IndexingContext::handleSynthesizedObjCMethod(const ObjCMethodDecl *D,
597                                                   SourceLocation Loc,
598                                                  const DeclContext *LexicalDC) {
599   DeclInfo DInfo(/*isRedeclaration=*/true, /*isDefinition=*/true,
600                  /*isContainer=*/false);
601   return handleDecl(D, Loc, getCursor(D), DInfo, LexicalDC);
602 }
603 
handleObjCProperty(const ObjCPropertyDecl * D)604 bool IndexingContext::handleObjCProperty(const ObjCPropertyDecl *D) {
605   ScratchAlloc SA(*this);
606 
607   ObjCPropertyDeclInfo DInfo;
608   EntityInfo GetterEntity;
609   EntityInfo SetterEntity;
610 
611   DInfo.ObjCPropDeclInfo.declInfo = &DInfo;
612 
613   if (ObjCMethodDecl *Getter = D->getGetterMethodDecl()) {
614     getEntityInfo(Getter, GetterEntity, SA);
615     DInfo.ObjCPropDeclInfo.getter = &GetterEntity;
616   } else {
617     DInfo.ObjCPropDeclInfo.getter = nullptr;
618   }
619   if (ObjCMethodDecl *Setter = D->getSetterMethodDecl()) {
620     getEntityInfo(Setter, SetterEntity, SA);
621     DInfo.ObjCPropDeclInfo.setter = &SetterEntity;
622   } else {
623     DInfo.ObjCPropDeclInfo.setter = nullptr;
624   }
625 
626   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
627 }
628 
handleNamespace(const NamespaceDecl * D)629 bool IndexingContext::handleNamespace(const NamespaceDecl *D) {
630   DeclInfo DInfo(/*isRedeclaration=*/!D->isOriginalNamespace(),
631                  /*isDefinition=*/true,
632                  /*isContainer=*/true);
633   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
634 }
635 
handleClassTemplate(const ClassTemplateDecl * D)636 bool IndexingContext::handleClassTemplate(const ClassTemplateDecl *D) {
637   return handleCXXRecordDecl(D->getTemplatedDecl(), D);
638 }
639 
handleFunctionTemplate(const FunctionTemplateDecl * D)640 bool IndexingContext::handleFunctionTemplate(const FunctionTemplateDecl *D) {
641   DeclInfo DInfo(/*isRedeclaration=*/!D->isCanonicalDecl(),
642                  /*isDefinition=*/D->isThisDeclarationADefinition(),
643                  /*isContainer=*/D->isThisDeclarationADefinition());
644   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
645 }
646 
handleTypeAliasTemplate(const TypeAliasTemplateDecl * D)647 bool IndexingContext::handleTypeAliasTemplate(const TypeAliasTemplateDecl *D) {
648   DeclInfo DInfo(/*isRedeclaration=*/!D->isCanonicalDecl(),
649                  /*isDefinition=*/true, /*isContainer=*/false);
650   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
651 }
652 
handleReference(const NamedDecl * D,SourceLocation Loc,const NamedDecl * Parent,const DeclContext * DC,const Expr * E,CXIdxEntityRefKind Kind)653 bool IndexingContext::handleReference(const NamedDecl *D, SourceLocation Loc,
654                                       const NamedDecl *Parent,
655                                       const DeclContext *DC,
656                                       const Expr *E,
657                                       CXIdxEntityRefKind Kind) {
658   if (!D)
659     return false;
660 
661   CXCursor Cursor = E ? MakeCXCursor(E, cast<Decl>(DC), CXTU)
662                       : getRefCursor(D, Loc);
663   return handleReference(D, Loc, Cursor, Parent, DC, E, Kind);
664 }
665 
handleReference(const NamedDecl * D,SourceLocation Loc,CXCursor Cursor,const NamedDecl * Parent,const DeclContext * DC,const Expr * E,CXIdxEntityRefKind Kind)666 bool IndexingContext::handleReference(const NamedDecl *D, SourceLocation Loc,
667                                       CXCursor Cursor,
668                                       const NamedDecl *Parent,
669                                       const DeclContext *DC,
670                                       const Expr *E,
671                                       CXIdxEntityRefKind Kind) {
672   if (!CB.indexEntityReference)
673     return false;
674 
675   if (!D)
676     return false;
677   if (Loc.isInvalid())
678     return false;
679   if (!shouldIndexFunctionLocalSymbols() && isFunctionLocalDecl(D))
680     return false;
681   if (isNotFromSourceFile(D->getLocation()))
682     return false;
683   if (D->isImplicit() && shouldIgnoreIfImplicit(D))
684     return false;
685 
686   if (shouldSuppressRefs()) {
687     if (markEntityOccurrenceInFile(D, Loc))
688       return false; // already occurred.
689   }
690 
691   ScratchAlloc SA(*this);
692   EntityInfo RefEntity, ParentEntity;
693   getEntityInfo(D, RefEntity, SA);
694   if (!RefEntity.USR)
695     return false;
696 
697   getEntityInfo(Parent, ParentEntity, SA);
698 
699   ContainerInfo Container;
700   getContainerInfo(DC, Container);
701 
702   CXIdxEntityRefInfo Info = { Kind,
703                               Cursor,
704                               getIndexLoc(Loc),
705                               &RefEntity,
706                               Parent ? &ParentEntity : nullptr,
707                               &Container };
708   CB.indexEntityReference(ClientData, &Info);
709   return true;
710 }
711 
isNotFromSourceFile(SourceLocation Loc) const712 bool IndexingContext::isNotFromSourceFile(SourceLocation Loc) const {
713   if (Loc.isInvalid())
714     return true;
715   SourceManager &SM = Ctx->getSourceManager();
716   SourceLocation FileLoc = SM.getFileLoc(Loc);
717   FileID FID = SM.getFileID(FileLoc);
718   return SM.getFileEntryForID(FID) == nullptr;
719 }
720 
addContainerInMap(const DeclContext * DC,CXIdxClientContainer container)721 void IndexingContext::addContainerInMap(const DeclContext *DC,
722                                         CXIdxClientContainer container) {
723   if (!DC)
724     return;
725 
726   ContainerMapTy::iterator I = ContainerMap.find(DC);
727   if (I == ContainerMap.end()) {
728     if (container)
729       ContainerMap[DC] = container;
730     return;
731   }
732   // Allow changing the container of a previously seen DeclContext so we
733   // can handle invalid user code, like a function re-definition.
734   if (container)
735     I->second = container;
736   else
737     ContainerMap.erase(I);
738 }
739 
getClientEntity(const Decl * D) const740 CXIdxClientEntity IndexingContext::getClientEntity(const Decl *D) const {
741   if (!D)
742     return nullptr;
743   EntityMapTy::const_iterator I = EntityMap.find(D);
744   if (I == EntityMap.end())
745     return nullptr;
746   return I->second;
747 }
748 
setClientEntity(const Decl * D,CXIdxClientEntity client)749 void IndexingContext::setClientEntity(const Decl *D, CXIdxClientEntity client) {
750   if (!D)
751     return;
752   EntityMap[D] = client;
753 }
754 
handleCXXRecordDecl(const CXXRecordDecl * RD,const NamedDecl * OrigD)755 bool IndexingContext::handleCXXRecordDecl(const CXXRecordDecl *RD,
756                                           const NamedDecl *OrigD) {
757   if (RD->isThisDeclarationADefinition()) {
758     ScratchAlloc SA(*this);
759     CXXClassDeclInfo CXXDInfo(/*isRedeclaration=*/!OrigD->isCanonicalDecl(),
760                            /*isDefinition=*/RD->isThisDeclarationADefinition());
761     CXXBasesListInfo BaseList(RD, *this, SA);
762     CXXDInfo.CXXClassInfo.declInfo = &CXXDInfo;
763     CXXDInfo.CXXClassInfo.bases = BaseList.getBases();
764     CXXDInfo.CXXClassInfo.numBases = BaseList.getNumBases();
765 
766     if (shouldSuppressRefs()) {
767       // Go through bases and mark them as referenced.
768       for (unsigned i = 0, e = BaseList.getNumBases(); i != e; ++i) {
769         const CXIdxBaseClassInfo *baseInfo = BaseList.getBases()[i];
770         if (baseInfo->base) {
771           const NamedDecl *BaseD = BaseList.BaseEntities[i].Dcl;
772           SourceLocation
773             Loc = SourceLocation::getFromRawEncoding(baseInfo->loc.int_data);
774           markEntityOccurrenceInFile(BaseD, Loc);
775         }
776       }
777     }
778 
779     return handleDecl(OrigD, OrigD->getLocation(), getCursor(OrigD), CXXDInfo);
780   }
781 
782   DeclInfo DInfo(/*isRedeclaration=*/!OrigD->isCanonicalDecl(),
783                  /*isDefinition=*/RD->isThisDeclarationADefinition(),
784                  /*isContainer=*/RD->isThisDeclarationADefinition());
785   return handleDecl(OrigD, OrigD->getLocation(), getCursor(OrigD), DInfo);
786 }
787 
markEntityOccurrenceInFile(const NamedDecl * D,SourceLocation Loc)788 bool IndexingContext::markEntityOccurrenceInFile(const NamedDecl *D,
789                                                  SourceLocation Loc) {
790   if (!D || Loc.isInvalid())
791     return true;
792 
793   SourceManager &SM = Ctx->getSourceManager();
794   D = getEntityDecl(D);
795 
796   std::pair<FileID, unsigned> LocInfo = SM.getDecomposedLoc(SM.getFileLoc(Loc));
797   FileID FID = LocInfo.first;
798   if (FID.isInvalid())
799     return true;
800 
801   const FileEntry *FE = SM.getFileEntryForID(FID);
802   if (!FE)
803     return true;
804   RefFileOccurrence RefOccur(FE, D);
805   std::pair<llvm::DenseSet<RefFileOccurrence>::iterator, bool>
806   res = RefFileOccurrences.insert(RefOccur);
807   if (!res.second)
808     return true; // already in map.
809 
810   return false;
811 }
812 
getEntityDecl(const NamedDecl * D) const813 const NamedDecl *IndexingContext::getEntityDecl(const NamedDecl *D) const {
814   assert(D);
815   D = cast<NamedDecl>(D->getCanonicalDecl());
816 
817   if (const ObjCImplementationDecl *
818                ImplD = dyn_cast<ObjCImplementationDecl>(D)) {
819     return getEntityDecl(ImplD->getClassInterface());
820 
821   } else if (const ObjCCategoryImplDecl *
822                CatImplD = dyn_cast<ObjCCategoryImplDecl>(D)) {
823     return getEntityDecl(CatImplD->getCategoryDecl());
824   } else if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
825     if (FunctionTemplateDecl *TemplD = FD->getDescribedFunctionTemplate())
826       return getEntityDecl(TemplD);
827   } else if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(D)) {
828     if (ClassTemplateDecl *TemplD = RD->getDescribedClassTemplate())
829       return getEntityDecl(TemplD);
830   }
831 
832   return D;
833 }
834 
835 const DeclContext *
getEntityContainer(const Decl * D) const836 IndexingContext::getEntityContainer(const Decl *D) const {
837   const DeclContext *DC = dyn_cast<DeclContext>(D);
838   if (DC)
839     return DC;
840 
841   if (const ClassTemplateDecl *ClassTempl = dyn_cast<ClassTemplateDecl>(D)) {
842     DC = ClassTempl->getTemplatedDecl();
843   } else if (const FunctionTemplateDecl *
844           FuncTempl = dyn_cast<FunctionTemplateDecl>(D)) {
845     DC = FuncTempl->getTemplatedDecl();
846   }
847 
848   return DC;
849 }
850 
851 CXIdxClientContainer
getClientContainerForDC(const DeclContext * DC) const852 IndexingContext::getClientContainerForDC(const DeclContext *DC) const {
853   if (!DC)
854     return nullptr;
855 
856   ContainerMapTy::const_iterator I = ContainerMap.find(DC);
857   if (I == ContainerMap.end())
858     return nullptr;
859 
860   return I->second;
861 }
862 
getIndexFile(const FileEntry * File)863 CXIdxClientFile IndexingContext::getIndexFile(const FileEntry *File) {
864   if (!File)
865     return nullptr;
866 
867   FileMapTy::iterator FI = FileMap.find(File);
868   if (FI != FileMap.end())
869     return FI->second;
870 
871   return nullptr;
872 }
873 
getIndexLoc(SourceLocation Loc) const874 CXIdxLoc IndexingContext::getIndexLoc(SourceLocation Loc) const {
875   CXIdxLoc idxLoc =  { {nullptr, nullptr}, 0 };
876   if (Loc.isInvalid())
877     return idxLoc;
878 
879   idxLoc.ptr_data[0] = const_cast<IndexingContext *>(this);
880   idxLoc.int_data = Loc.getRawEncoding();
881   return idxLoc;
882 }
883 
translateLoc(SourceLocation Loc,CXIdxClientFile * indexFile,CXFile * file,unsigned * line,unsigned * column,unsigned * offset)884 void IndexingContext::translateLoc(SourceLocation Loc,
885                                    CXIdxClientFile *indexFile, CXFile *file,
886                                    unsigned *line, unsigned *column,
887                                    unsigned *offset) {
888   if (Loc.isInvalid())
889     return;
890 
891   SourceManager &SM = Ctx->getSourceManager();
892   Loc = SM.getFileLoc(Loc);
893 
894   std::pair<FileID, unsigned> LocInfo = SM.getDecomposedLoc(Loc);
895   FileID FID = LocInfo.first;
896   unsigned FileOffset = LocInfo.second;
897 
898   if (FID.isInvalid())
899     return;
900 
901   const FileEntry *FE = SM.getFileEntryForID(FID);
902   if (indexFile)
903     *indexFile = getIndexFile(FE);
904   if (file)
905     *file = const_cast<FileEntry *>(FE);
906   if (line)
907     *line = SM.getLineNumber(FID, FileOffset);
908   if (column)
909     *column = SM.getColumnNumber(FID, FileOffset);
910   if (offset)
911     *offset = FileOffset;
912 }
913 
getEntityInfo(const NamedDecl * D,EntityInfo & EntityInfo,ScratchAlloc & SA)914 void IndexingContext::getEntityInfo(const NamedDecl *D,
915                                     EntityInfo &EntityInfo,
916                                     ScratchAlloc &SA) {
917   if (!D)
918     return;
919 
920   D = getEntityDecl(D);
921   EntityInfo.cursor = getCursor(D);
922   EntityInfo.Dcl = D;
923   EntityInfo.IndexCtx = this;
924   EntityInfo.kind = CXIdxEntity_Unexposed;
925   EntityInfo.templateKind = CXIdxEntity_NonTemplate;
926   EntityInfo.lang = CXIdxEntityLang_C;
927 
928   if (D->hasAttrs()) {
929     EntityInfo.AttrList = AttrListInfo::create(D, *this);
930     EntityInfo.attributes = EntityInfo.AttrList->getAttrs();
931     EntityInfo.numAttributes = EntityInfo.AttrList->getNumAttrs();
932   }
933 
934   if (const TagDecl *TD = dyn_cast<TagDecl>(D)) {
935     switch (TD->getTagKind()) {
936     case TTK_Struct:
937       EntityInfo.kind = CXIdxEntity_Struct; break;
938     case TTK_Union:
939       EntityInfo.kind = CXIdxEntity_Union; break;
940     case TTK_Class:
941       EntityInfo.kind = CXIdxEntity_CXXClass;
942       EntityInfo.lang = CXIdxEntityLang_CXX;
943       break;
944     case TTK_Interface:
945       EntityInfo.kind = CXIdxEntity_CXXInterface;
946       EntityInfo.lang = CXIdxEntityLang_CXX;
947       break;
948     case TTK_Enum:
949       EntityInfo.kind = CXIdxEntity_Enum; break;
950     }
951 
952     if (const CXXRecordDecl *CXXRec = dyn_cast<CXXRecordDecl>(D))
953       if (!CXXRec->isCLike())
954         EntityInfo.lang = CXIdxEntityLang_CXX;
955 
956     if (isa<ClassTemplatePartialSpecializationDecl>(D)) {
957       EntityInfo.templateKind = CXIdxEntity_TemplatePartialSpecialization;
958     } else if (isa<ClassTemplateSpecializationDecl>(D)) {
959       EntityInfo.templateKind = CXIdxEntity_TemplateSpecialization;
960     }
961 
962   } else {
963     switch (D->getKind()) {
964     case Decl::Typedef:
965       EntityInfo.kind = CXIdxEntity_Typedef; break;
966     case Decl::Function:
967       EntityInfo.kind = CXIdxEntity_Function;
968       break;
969     case Decl::ParmVar:
970       EntityInfo.kind = CXIdxEntity_Variable;
971       break;
972     case Decl::Var:
973       EntityInfo.kind = CXIdxEntity_Variable;
974       if (isa<CXXRecordDecl>(D->getDeclContext())) {
975         EntityInfo.kind = CXIdxEntity_CXXStaticVariable;
976         EntityInfo.lang = CXIdxEntityLang_CXX;
977       }
978       break;
979     case Decl::Field:
980       EntityInfo.kind = CXIdxEntity_Field;
981       if (const CXXRecordDecl *
982             CXXRec = dyn_cast<CXXRecordDecl>(D->getDeclContext())) {
983         // FIXME: isPOD check is not sufficient, a POD can contain methods,
984         // we want a isCStructLike check.
985         if (!CXXRec->isPOD())
986           EntityInfo.lang = CXIdxEntityLang_CXX;
987       }
988       break;
989     case Decl::EnumConstant:
990       EntityInfo.kind = CXIdxEntity_EnumConstant; break;
991     case Decl::ObjCInterface:
992       EntityInfo.kind = CXIdxEntity_ObjCClass;
993       EntityInfo.lang = CXIdxEntityLang_ObjC;
994       break;
995     case Decl::ObjCProtocol:
996       EntityInfo.kind = CXIdxEntity_ObjCProtocol;
997       EntityInfo.lang = CXIdxEntityLang_ObjC;
998       break;
999     case Decl::ObjCCategory:
1000       EntityInfo.kind = CXIdxEntity_ObjCCategory;
1001       EntityInfo.lang = CXIdxEntityLang_ObjC;
1002       break;
1003     case Decl::ObjCMethod:
1004       if (cast<ObjCMethodDecl>(D)->isInstanceMethod())
1005         EntityInfo.kind = CXIdxEntity_ObjCInstanceMethod;
1006       else
1007         EntityInfo.kind = CXIdxEntity_ObjCClassMethod;
1008       EntityInfo.lang = CXIdxEntityLang_ObjC;
1009       break;
1010     case Decl::ObjCProperty:
1011       EntityInfo.kind = CXIdxEntity_ObjCProperty;
1012       EntityInfo.lang = CXIdxEntityLang_ObjC;
1013       break;
1014     case Decl::ObjCIvar:
1015       EntityInfo.kind = CXIdxEntity_ObjCIvar;
1016       EntityInfo.lang = CXIdxEntityLang_ObjC;
1017       break;
1018     case Decl::Namespace:
1019       EntityInfo.kind = CXIdxEntity_CXXNamespace;
1020       EntityInfo.lang = CXIdxEntityLang_CXX;
1021       break;
1022     case Decl::NamespaceAlias:
1023       EntityInfo.kind = CXIdxEntity_CXXNamespaceAlias;
1024       EntityInfo.lang = CXIdxEntityLang_CXX;
1025       break;
1026     case Decl::CXXConstructor:
1027       EntityInfo.kind = CXIdxEntity_CXXConstructor;
1028       EntityInfo.lang = CXIdxEntityLang_CXX;
1029       break;
1030     case Decl::CXXDestructor:
1031       EntityInfo.kind = CXIdxEntity_CXXDestructor;
1032       EntityInfo.lang = CXIdxEntityLang_CXX;
1033       break;
1034     case Decl::CXXConversion:
1035       EntityInfo.kind = CXIdxEntity_CXXConversionFunction;
1036       EntityInfo.lang = CXIdxEntityLang_CXX;
1037       break;
1038     case Decl::CXXMethod: {
1039       const CXXMethodDecl *MD = cast<CXXMethodDecl>(D);
1040       if (MD->isStatic())
1041         EntityInfo.kind = CXIdxEntity_CXXStaticMethod;
1042       else
1043         EntityInfo.kind = CXIdxEntity_CXXInstanceMethod;
1044       EntityInfo.lang = CXIdxEntityLang_CXX;
1045       break;
1046     }
1047     case Decl::ClassTemplate:
1048       EntityInfo.kind = CXIdxEntity_CXXClass;
1049       EntityInfo.templateKind = CXIdxEntity_Template;
1050       break;
1051     case Decl::FunctionTemplate:
1052       EntityInfo.kind = CXIdxEntity_Function;
1053       EntityInfo.templateKind = CXIdxEntity_Template;
1054       if (const CXXMethodDecl *MD = dyn_cast_or_null<CXXMethodDecl>(
1055                            cast<FunctionTemplateDecl>(D)->getTemplatedDecl())) {
1056         if (isa<CXXConstructorDecl>(MD))
1057           EntityInfo.kind = CXIdxEntity_CXXConstructor;
1058         else if (isa<CXXDestructorDecl>(MD))
1059           EntityInfo.kind = CXIdxEntity_CXXDestructor;
1060         else if (isa<CXXConversionDecl>(MD))
1061           EntityInfo.kind = CXIdxEntity_CXXConversionFunction;
1062         else {
1063           if (MD->isStatic())
1064             EntityInfo.kind = CXIdxEntity_CXXStaticMethod;
1065           else
1066             EntityInfo.kind = CXIdxEntity_CXXInstanceMethod;
1067         }
1068       }
1069       break;
1070     case Decl::TypeAliasTemplate:
1071       EntityInfo.kind = CXIdxEntity_CXXTypeAlias;
1072       EntityInfo.templateKind = CXIdxEntity_Template;
1073       break;
1074     case Decl::TypeAlias:
1075       EntityInfo.kind = CXIdxEntity_CXXTypeAlias;
1076       EntityInfo.lang = CXIdxEntityLang_CXX;
1077       break;
1078     default:
1079       break;
1080     }
1081   }
1082 
1083   if (EntityInfo.kind == CXIdxEntity_Unexposed)
1084     return;
1085 
1086   if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
1087     if (FD->getTemplatedKind() ==
1088           FunctionDecl::TK_FunctionTemplateSpecialization)
1089       EntityInfo.templateKind = CXIdxEntity_TemplateSpecialization;
1090   }
1091 
1092   if (EntityInfo.templateKind != CXIdxEntity_NonTemplate)
1093     EntityInfo.lang = CXIdxEntityLang_CXX;
1094 
1095   if (IdentifierInfo *II = D->getIdentifier()) {
1096     EntityInfo.name = SA.toCStr(II->getName());
1097 
1098   } else if (isa<TagDecl>(D) || isa<FieldDecl>(D) || isa<NamespaceDecl>(D)) {
1099     EntityInfo.name = nullptr; // anonymous tag/field/namespace.
1100 
1101   } else {
1102     SmallString<256> StrBuf;
1103     {
1104       llvm::raw_svector_ostream OS(StrBuf);
1105       D->printName(OS);
1106     }
1107     EntityInfo.name = SA.copyCStr(StrBuf.str());
1108   }
1109 
1110   {
1111     SmallString<512> StrBuf;
1112     bool Ignore = getDeclCursorUSR(D, StrBuf);
1113     if (Ignore) {
1114       EntityInfo.USR = nullptr;
1115     } else {
1116       EntityInfo.USR = SA.copyCStr(StrBuf.str());
1117     }
1118   }
1119 }
1120 
getContainerInfo(const DeclContext * DC,ContainerInfo & ContInfo)1121 void IndexingContext::getContainerInfo(const DeclContext *DC,
1122                                        ContainerInfo &ContInfo) {
1123   ContInfo.cursor = getCursor(cast<Decl>(DC));
1124   ContInfo.DC = DC;
1125   ContInfo.IndexCtx = this;
1126 }
1127 
getRefCursor(const NamedDecl * D,SourceLocation Loc)1128 CXCursor IndexingContext::getRefCursor(const NamedDecl *D, SourceLocation Loc) {
1129   if (const TypeDecl *TD = dyn_cast<TypeDecl>(D))
1130     return MakeCursorTypeRef(TD, Loc, CXTU);
1131   if (const ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(D))
1132     return MakeCursorObjCClassRef(ID, Loc, CXTU);
1133   if (const ObjCProtocolDecl *PD = dyn_cast<ObjCProtocolDecl>(D))
1134     return MakeCursorObjCProtocolRef(PD, Loc, CXTU);
1135   if (const TemplateDecl *Template = dyn_cast<TemplateDecl>(D))
1136     return MakeCursorTemplateRef(Template, Loc, CXTU);
1137   if (const NamespaceDecl *Namespace = dyn_cast<NamespaceDecl>(D))
1138     return MakeCursorNamespaceRef(Namespace, Loc, CXTU);
1139   if (const NamespaceAliasDecl *Namespace = dyn_cast<NamespaceAliasDecl>(D))
1140     return MakeCursorNamespaceRef(Namespace, Loc, CXTU);
1141   if (const FieldDecl *Field = dyn_cast<FieldDecl>(D))
1142     return MakeCursorMemberRef(Field, Loc, CXTU);
1143   if (const VarDecl *Var = dyn_cast<VarDecl>(D))
1144     return MakeCursorVariableRef(Var, Loc, CXTU);
1145 
1146   return clang_getNullCursor();
1147 }
1148 
shouldIgnoreIfImplicit(const Decl * D)1149 bool IndexingContext::shouldIgnoreIfImplicit(const Decl *D) {
1150   if (isa<ObjCInterfaceDecl>(D))
1151     return false;
1152   if (isa<ObjCCategoryDecl>(D))
1153     return false;
1154   if (isa<ObjCIvarDecl>(D))
1155     return false;
1156   if (isa<ObjCMethodDecl>(D))
1157     return false;
1158   if (isa<ImportDecl>(D))
1159     return false;
1160   return true;
1161 }
1162 
isTemplateImplicitInstantiation(const Decl * D)1163 bool IndexingContext::isTemplateImplicitInstantiation(const Decl *D) {
1164   if (const ClassTemplateSpecializationDecl *
1165         SD = dyn_cast<ClassTemplateSpecializationDecl>(D)) {
1166     return SD->getSpecializationKind() == TSK_ImplicitInstantiation;
1167   }
1168   if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
1169     return FD->getTemplateSpecializationKind() == TSK_ImplicitInstantiation;
1170   }
1171   return false;
1172 }
1173