1 //===- USRGeneration.cpp - Routines for USR generation --------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "clang/Index/USRGeneration.h"
11 #include "clang/AST/ASTContext.h"
12 #include "clang/AST/DeclTemplate.h"
13 #include "clang/AST/DeclVisitor.h"
14 #include "clang/Lex/PreprocessingRecord.h"
15 #include "llvm/ADT/SmallString.h"
16 #include "llvm/Support/Path.h"
17 #include "llvm/Support/raw_ostream.h"
19 using namespace clang;
20 using namespace clang::index;
22 //===----------------------------------------------------------------------===//
24 //===----------------------------------------------------------------------===//
26 /// \returns true on error.
27 static bool printLoc(llvm::raw_ostream &OS, SourceLocation Loc,
28 const SourceManager &SM, bool IncludeOffset) {
29 if (Loc.isInvalid()) {
32 Loc = SM.getExpansionLoc(Loc);
33 const std::pair<FileID, unsigned> &Decomposed = SM.getDecomposedLoc(Loc);
34 const FileEntry *FE = SM.getFileEntryForID(Decomposed.first);
36 OS << llvm::sys::path::filename(FE->getName());
38 // This case really isn't interesting.
42 // Use the offest into the FileID to represent the location. Using
43 // a line/column can cause us to look back at the original source file,
44 // which is expensive.
45 OS << '@' << Decomposed.second;
51 class USRGenerator : public ConstDeclVisitor<USRGenerator> {
52 SmallVectorImpl<char> &Buf;
53 llvm::raw_svector_ostream Out;
58 llvm::DenseMap<const Type *, unsigned> TypeSubstitutions;
61 explicit USRGenerator(ASTContext *Ctx, SmallVectorImpl<char> &Buf)
68 // Add the USR space prefix.
69 Out << getUSRSpacePrefix();
72 bool ignoreResults() const { return IgnoreResults; }
74 // Visitation methods from generating USRs from AST elements.
75 void VisitDeclContext(const DeclContext *D);
76 void VisitFieldDecl(const FieldDecl *D);
77 void VisitFunctionDecl(const FunctionDecl *D);
78 void VisitNamedDecl(const NamedDecl *D);
79 void VisitNamespaceDecl(const NamespaceDecl *D);
80 void VisitNamespaceAliasDecl(const NamespaceAliasDecl *D);
81 void VisitFunctionTemplateDecl(const FunctionTemplateDecl *D);
82 void VisitClassTemplateDecl(const ClassTemplateDecl *D);
83 void VisitObjCContainerDecl(const ObjCContainerDecl *CD);
84 void VisitObjCMethodDecl(const ObjCMethodDecl *MD);
85 void VisitObjCPropertyDecl(const ObjCPropertyDecl *D);
86 void VisitObjCPropertyImplDecl(const ObjCPropertyImplDecl *D);
87 void VisitTagDecl(const TagDecl *D);
88 void VisitTypedefDecl(const TypedefDecl *D);
89 void VisitTemplateTypeParmDecl(const TemplateTypeParmDecl *D);
90 void VisitVarDecl(const VarDecl *D);
91 void VisitNonTypeTemplateParmDecl(const NonTypeTemplateParmDecl *D);
92 void VisitTemplateTemplateParmDecl(const TemplateTemplateParmDecl *D);
93 void VisitLinkageSpecDecl(const LinkageSpecDecl *D) {
96 void VisitUsingDirectiveDecl(const UsingDirectiveDecl *D) {
99 void VisitUsingDecl(const UsingDecl *D) {
100 IgnoreResults = true;
102 void VisitUnresolvedUsingValueDecl(const UnresolvedUsingValueDecl *D) {
103 IgnoreResults = true;
105 void VisitUnresolvedUsingTypenameDecl(const UnresolvedUsingTypenameDecl *D) {
106 IgnoreResults = true;
109 bool ShouldGenerateLocation(const NamedDecl *D);
111 bool isLocal(const NamedDecl *D) {
112 return D->getParentFunctionOrMethod() != nullptr;
115 /// Generate the string component containing the location of the
117 bool GenLoc(const Decl *D, bool IncludeOffset);
119 /// String generation methods used both by the visitation methods
120 /// and from other clients that want to directly generate USRs. These
121 /// methods do not construct complete USRs (which incorporate the parents
122 /// of an AST element), but only the fragments concerning the AST element
125 /// Generate a USR for an Objective-C class.
126 void GenObjCClass(StringRef cls) {
127 generateUSRForObjCClass(cls, Out);
129 /// Generate a USR for an Objective-C class category.
130 void GenObjCCategory(StringRef cls, StringRef cat) {
131 generateUSRForObjCCategory(cls, cat, Out);
133 /// Generate a USR fragment for an Objective-C property.
134 void GenObjCProperty(StringRef prop) {
135 generateUSRForObjCProperty(prop, Out);
137 /// Generate a USR for an Objective-C protocol.
138 void GenObjCProtocol(StringRef prot) {
139 generateUSRForObjCProtocol(prot, Out);
142 void VisitType(QualType T);
143 void VisitTemplateParameterList(const TemplateParameterList *Params);
144 void VisitTemplateName(TemplateName Name);
145 void VisitTemplateArgument(const TemplateArgument &Arg);
147 /// Emit a Decl's name using NamedDecl::printName() and return true if
148 /// the decl had no name.
149 bool EmitDeclName(const NamedDecl *D);
152 } // end anonymous namespace
154 //===----------------------------------------------------------------------===//
155 // Generating USRs from ASTS.
156 //===----------------------------------------------------------------------===//
158 bool USRGenerator::EmitDeclName(const NamedDecl *D) {
160 const unsigned startSize = Buf.size();
163 const unsigned endSize = Buf.size();
164 return startSize == endSize;
167 bool USRGenerator::ShouldGenerateLocation(const NamedDecl *D) {
168 if (D->isExternallyVisible())
170 if (D->getParentFunctionOrMethod())
172 const SourceManager &SM = Context->getSourceManager();
173 return !SM.isInSystemHeader(D->getLocation());
176 void USRGenerator::VisitDeclContext(const DeclContext *DC) {
177 if (const NamedDecl *D = dyn_cast<NamedDecl>(DC))
181 void USRGenerator::VisitFieldDecl(const FieldDecl *D) {
182 // The USR for an ivar declared in a class extension is based on the
183 // ObjCInterfaceDecl, not the ObjCCategoryDecl.
184 if (const ObjCInterfaceDecl *ID = Context->getObjContainingInterface(D))
187 VisitDeclContext(D->getDeclContext());
188 Out << (isa<ObjCIvarDecl>(D) ? "@" : "@FI@");
189 if (EmitDeclName(D)) {
190 // Bit fields can be anonymous.
191 IgnoreResults = true;
196 void USRGenerator::VisitFunctionDecl(const FunctionDecl *D) {
197 if (ShouldGenerateLocation(D) && GenLoc(D, /*IncludeOffset=*/isLocal(D)))
200 VisitDeclContext(D->getDeclContext());
201 bool IsTemplate = false;
202 if (FunctionTemplateDecl *FunTmpl = D->getDescribedFunctionTemplate()) {
205 VisitTemplateParameterList(FunTmpl->getTemplateParameters());
210 ASTContext &Ctx = *Context;
211 if (!Ctx.getLangOpts().CPlusPlus || D->isExternC())
214 if (const TemplateArgumentList *
215 SpecArgs = D->getTemplateSpecializationArgs()) {
217 for (unsigned I = 0, N = SpecArgs->size(); I != N; ++I) {
219 VisitTemplateArgument(SpecArgs->get(I));
224 // Mangle in type information for the arguments.
225 for (auto PD : D->params()) {
227 VisitType(PD->getType());
232 // Function templates can be overloaded by return type, for example:
234 // template <class T> typename T::A foo() {}
235 // template <class T> typename T::B foo() {}
238 VisitType(D->getReturnType());
241 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(D)) {
244 if (unsigned quals = MD->getTypeQualifiers())
245 Out << (char)('0' + quals);
246 switch (MD->getRefQualifier()) {
248 case RQ_LValue: Out << '&'; break;
249 case RQ_RValue: Out << "&&"; break;
254 void USRGenerator::VisitNamedDecl(const NamedDecl *D) {
255 VisitDeclContext(D->getDeclContext());
258 if (EmitDeclName(D)) {
259 // The string can be empty if the declaration has no name; e.g., it is
260 // the ParmDecl with no name for declaration of a function pointer type,
261 // e.g.: void (*f)(void *);
262 // In this case, don't generate a USR.
263 IgnoreResults = true;
267 void USRGenerator::VisitVarDecl(const VarDecl *D) {
268 // VarDecls can be declared 'extern' within a function or method body,
269 // but their enclosing DeclContext is the function, not the TU. We need
270 // to check the storage class to correctly generate the USR.
271 if (ShouldGenerateLocation(D) && GenLoc(D, /*IncludeOffset=*/isLocal(D)))
274 VisitDeclContext(D->getDeclContext());
276 // Variables always have simple names.
277 StringRef s = D->getName();
279 // The string can be empty if the declaration has no name; e.g., it is
280 // the ParmDecl with no name for declaration of a function pointer type, e.g.:
281 // void (*f)(void *);
282 // In this case, don't generate a USR.
284 IgnoreResults = true;
289 void USRGenerator::VisitNonTypeTemplateParmDecl(
290 const NonTypeTemplateParmDecl *D) {
291 GenLoc(D, /*IncludeOffset=*/true);
295 void USRGenerator::VisitTemplateTemplateParmDecl(
296 const TemplateTemplateParmDecl *D) {
297 GenLoc(D, /*IncludeOffset=*/true);
301 void USRGenerator::VisitNamespaceDecl(const NamespaceDecl *D) {
302 if (D->isAnonymousNamespace()) {
307 VisitDeclContext(D->getDeclContext());
309 Out << "@N@" << D->getName();
312 void USRGenerator::VisitFunctionTemplateDecl(const FunctionTemplateDecl *D) {
313 VisitFunctionDecl(D->getTemplatedDecl());
316 void USRGenerator::VisitClassTemplateDecl(const ClassTemplateDecl *D) {
317 VisitTagDecl(D->getTemplatedDecl());
320 void USRGenerator::VisitNamespaceAliasDecl(const NamespaceAliasDecl *D) {
321 VisitDeclContext(D->getDeclContext());
323 Out << "@NA@" << D->getName();
326 void USRGenerator::VisitObjCMethodDecl(const ObjCMethodDecl *D) {
327 const DeclContext *container = D->getDeclContext();
328 if (const ObjCProtocolDecl *pd = dyn_cast<ObjCProtocolDecl>(container)) {
332 // The USR for a method declared in a class extension or category is based on
333 // the ObjCInterfaceDecl, not the ObjCCategoryDecl.
334 const ObjCInterfaceDecl *ID = D->getClassInterface();
336 IgnoreResults = true;
341 // Ideally we would use 'GenObjCMethod', but this is such a hot path
342 // for Objective-C code that we don't want to use
343 // DeclarationName::getAsString().
344 Out << (D->isInstanceMethod() ? "(im)" : "(cm)")
345 << DeclarationName(D->getSelector());
348 void USRGenerator::VisitObjCContainerDecl(const ObjCContainerDecl *D) {
349 switch (D->getKind()) {
351 llvm_unreachable("Invalid ObjC container.");
352 case Decl::ObjCInterface:
353 case Decl::ObjCImplementation:
354 GenObjCClass(D->getName());
356 case Decl::ObjCCategory: {
357 const ObjCCategoryDecl *CD = cast<ObjCCategoryDecl>(D);
358 const ObjCInterfaceDecl *ID = CD->getClassInterface();
360 // Handle invalid code where the @interface might not
361 // have been specified.
362 // FIXME: We should be able to generate this USR even if the
363 // @interface isn't available.
364 IgnoreResults = true;
367 // Specially handle class extensions, which are anonymous categories.
368 // We want to mangle in the location to uniquely distinguish them.
369 if (CD->IsClassExtension()) {
370 Out << "objc(ext)" << ID->getName() << '@';
371 GenLoc(CD, /*IncludeOffset=*/true);
374 GenObjCCategory(ID->getName(), CD->getName());
378 case Decl::ObjCCategoryImpl: {
379 const ObjCCategoryImplDecl *CD = cast<ObjCCategoryImplDecl>(D);
380 const ObjCInterfaceDecl *ID = CD->getClassInterface();
382 // Handle invalid code where the @interface might not
383 // have been specified.
384 // FIXME: We should be able to generate this USR even if the
385 // @interface isn't available.
386 IgnoreResults = true;
389 GenObjCCategory(ID->getName(), CD->getName());
392 case Decl::ObjCProtocol:
393 GenObjCProtocol(cast<ObjCProtocolDecl>(D)->getName());
398 void USRGenerator::VisitObjCPropertyDecl(const ObjCPropertyDecl *D) {
399 // The USR for a property declared in a class extension or category is based
400 // on the ObjCInterfaceDecl, not the ObjCCategoryDecl.
401 if (const ObjCInterfaceDecl *ID = Context->getObjContainingInterface(D))
404 Visit(cast<Decl>(D->getDeclContext()));
405 GenObjCProperty(D->getName());
408 void USRGenerator::VisitObjCPropertyImplDecl(const ObjCPropertyImplDecl *D) {
409 if (ObjCPropertyDecl *PD = D->getPropertyDecl()) {
410 VisitObjCPropertyDecl(PD);
414 IgnoreResults = true;
417 void USRGenerator::VisitTagDecl(const TagDecl *D) {
418 // Add the location of the tag decl to handle resolution across
419 // translation units.
420 if (ShouldGenerateLocation(D) && GenLoc(D, /*IncludeOffset=*/isLocal(D)))
423 D = D->getCanonicalDecl();
424 VisitDeclContext(D->getDeclContext());
426 bool AlreadyStarted = false;
427 if (const CXXRecordDecl *CXXRecord = dyn_cast<CXXRecordDecl>(D)) {
428 if (ClassTemplateDecl *ClassTmpl = CXXRecord->getDescribedClassTemplate()) {
429 AlreadyStarted = true;
431 switch (D->getTagKind()) {
434 case TTK_Struct: Out << "@ST"; break;
435 case TTK_Union: Out << "@UT"; break;
436 case TTK_Enum: llvm_unreachable("enum template");
438 VisitTemplateParameterList(ClassTmpl->getTemplateParameters());
439 } else if (const ClassTemplatePartialSpecializationDecl *PartialSpec
440 = dyn_cast<ClassTemplatePartialSpecializationDecl>(CXXRecord)) {
441 AlreadyStarted = true;
443 switch (D->getTagKind()) {
446 case TTK_Struct: Out << "@SP"; break;
447 case TTK_Union: Out << "@UP"; break;
448 case TTK_Enum: llvm_unreachable("enum partial specialization");
450 VisitTemplateParameterList(PartialSpec->getTemplateParameters());
454 if (!AlreadyStarted) {
455 switch (D->getTagKind()) {
458 case TTK_Struct: Out << "@S"; break;
459 case TTK_Union: Out << "@U"; break;
460 case TTK_Enum: Out << "@E"; break;
466 assert(Buf.size() > 0);
467 const unsigned off = Buf.size() - 1;
469 if (EmitDeclName(D)) {
470 if (const TypedefNameDecl *TD = D->getTypedefNameForAnonDecl()) {
475 if (D->isEmbeddedInDeclarator() && !D->isFreeStanding()) {
476 printLoc(Out, D->getLocation(), Context->getSourceManager(), true);
482 // For a class template specialization, mangle the template arguments.
483 if (const ClassTemplateSpecializationDecl *Spec
484 = dyn_cast<ClassTemplateSpecializationDecl>(D)) {
485 const TemplateArgumentList &Args = Spec->getTemplateInstantiationArgs();
487 for (unsigned I = 0, N = Args.size(); I != N; ++I) {
489 VisitTemplateArgument(Args.get(I));
494 void USRGenerator::VisitTypedefDecl(const TypedefDecl *D) {
495 if (ShouldGenerateLocation(D) && GenLoc(D, /*IncludeOffset=*/isLocal(D)))
497 const DeclContext *DC = D->getDeclContext();
498 if (const NamedDecl *DCN = dyn_cast<NamedDecl>(DC))
504 void USRGenerator::VisitTemplateTypeParmDecl(const TemplateTypeParmDecl *D) {
505 GenLoc(D, /*IncludeOffset=*/true);
509 bool USRGenerator::GenLoc(const Decl *D, bool IncludeOffset) {
511 return IgnoreResults;
514 // Guard against null declarations in invalid code.
516 IgnoreResults = true;
520 // Use the location of canonical decl.
521 D = D->getCanonicalDecl();
524 IgnoreResults || printLoc(Out, D->getLocStart(),
525 Context->getSourceManager(), IncludeOffset);
527 return IgnoreResults;
530 void USRGenerator::VisitType(QualType T) {
531 // This method mangles in USR information for types. It can possibly
532 // just reuse the naming-mangling logic used by codegen, although the
533 // requirements for USRs might not be the same.
534 ASTContext &Ctx = *Context;
537 T = Ctx.getCanonicalType(T);
538 Qualifiers Q = T.getQualifiers();
547 Out << ((char) ('0' + qVal));
549 // Mangle in ObjC GC qualifiers?
551 if (const PackExpansionType *Expansion = T->getAs<PackExpansionType>()) {
553 T = Expansion->getPattern();
556 if (const BuiltinType *BT = T->getAs<BuiltinType>()) {
557 unsigned char c = '\0';
558 switch (BT->getKind()) {
559 case BuiltinType::Void:
561 case BuiltinType::Bool:
563 case BuiltinType::UChar:
565 case BuiltinType::Char16:
567 case BuiltinType::Char32:
569 case BuiltinType::UShort:
571 case BuiltinType::UInt:
573 case BuiltinType::ULong:
575 case BuiltinType::ULongLong:
577 case BuiltinType::UInt128:
579 case BuiltinType::Char_U:
580 case BuiltinType::Char_S:
582 case BuiltinType::SChar:
584 case BuiltinType::WChar_S:
585 case BuiltinType::WChar_U:
587 case BuiltinType::Short:
589 case BuiltinType::Int:
591 case BuiltinType::Long:
593 case BuiltinType::LongLong:
595 case BuiltinType::Int128:
597 case BuiltinType::Half:
599 case BuiltinType::Float:
601 case BuiltinType::Double:
603 case BuiltinType::LongDouble:
605 case BuiltinType::NullPtr:
607 #define BUILTIN_TYPE(Id, SingletonId)
608 #define PLACEHOLDER_TYPE(Id, SingletonId) case BuiltinType::Id:
609 #include "clang/AST/BuiltinTypes.def"
610 case BuiltinType::Dependent:
611 case BuiltinType::OCLImage1d:
612 case BuiltinType::OCLImage1dArray:
613 case BuiltinType::OCLImage1dBuffer:
614 case BuiltinType::OCLImage2d:
615 case BuiltinType::OCLImage2dArray:
616 case BuiltinType::OCLImage3d:
617 case BuiltinType::OCLEvent:
618 case BuiltinType::OCLSampler:
619 IgnoreResults = true;
621 case BuiltinType::ObjCId:
623 case BuiltinType::ObjCClass:
625 case BuiltinType::ObjCSel:
632 // If we have already seen this (non-built-in) type, use a substitution
634 llvm::DenseMap<const Type *, unsigned>::iterator Substitution
635 = TypeSubstitutions.find(T.getTypePtr());
636 if (Substitution != TypeSubstitutions.end()) {
637 Out << 'S' << Substitution->second << '_';
640 // Record this as a substitution.
641 unsigned Number = TypeSubstitutions.size();
642 TypeSubstitutions[T.getTypePtr()] = Number;
645 if (const PointerType *PT = T->getAs<PointerType>()) {
647 T = PT->getPointeeType();
650 if (const RValueReferenceType *RT = T->getAs<RValueReferenceType>()) {
652 T = RT->getPointeeType();
655 if (const ReferenceType *RT = T->getAs<ReferenceType>()) {
657 T = RT->getPointeeType();
660 if (const FunctionProtoType *FT = T->getAs<FunctionProtoType>()) {
662 VisitType(FT->getReturnType());
663 for (const auto &I : FT->param_types())
665 if (FT->isVariadic())
669 if (const BlockPointerType *BT = T->getAs<BlockPointerType>()) {
671 T = BT->getPointeeType();
674 if (const ComplexType *CT = T->getAs<ComplexType>()) {
676 T = CT->getElementType();
679 if (const TagType *TT = T->getAs<TagType>()) {
681 VisitTagDecl(TT->getDecl());
684 if (const TemplateTypeParmType *TTP = T->getAs<TemplateTypeParmType>()) {
685 Out << 't' << TTP->getDepth() << '.' << TTP->getIndex();
688 if (const TemplateSpecializationType *Spec
689 = T->getAs<TemplateSpecializationType>()) {
691 VisitTemplateName(Spec->getTemplateName());
692 Out << Spec->getNumArgs();
693 for (unsigned I = 0, N = Spec->getNumArgs(); I != N; ++I)
694 VisitTemplateArgument(Spec->getArg(I));
697 if (const DependentNameType *DNT = T->getAs<DependentNameType>()) {
699 // FIXME: Encode the qualifier, don't just print it.
700 PrintingPolicy PO(Ctx.getLangOpts());
701 PO.SuppressTagKeyword = true;
702 PO.SuppressUnwrittenScope = true;
703 PO.ConstantArraySizeAsWritten = false;
704 PO.AnonymousTagLocations = false;
705 DNT->getQualifier()->print(Out, PO);
706 Out << ':' << DNT->getIdentifier()->getName();
709 if (const InjectedClassNameType *InjT = T->getAs<InjectedClassNameType>()) {
710 T = InjT->getInjectedSpecializationType();
720 void USRGenerator::VisitTemplateParameterList(
721 const TemplateParameterList *Params) {
724 Out << '>' << Params->size();
725 for (TemplateParameterList::const_iterator P = Params->begin(),
726 PEnd = Params->end();
729 if (isa<TemplateTypeParmDecl>(*P)) {
730 if (cast<TemplateTypeParmDecl>(*P)->isParameterPack())
736 if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(*P)) {
737 if (NTTP->isParameterPack())
740 VisitType(NTTP->getType());
744 TemplateTemplateParmDecl *TTP = cast<TemplateTemplateParmDecl>(*P);
745 if (TTP->isParameterPack())
748 VisitTemplateParameterList(TTP->getTemplateParameters());
752 void USRGenerator::VisitTemplateName(TemplateName Name) {
753 if (TemplateDecl *Template = Name.getAsTemplateDecl()) {
754 if (TemplateTemplateParmDecl *TTP
755 = dyn_cast<TemplateTemplateParmDecl>(Template)) {
756 Out << 't' << TTP->getDepth() << '.' << TTP->getIndex();
764 // FIXME: Visit dependent template names.
767 void USRGenerator::VisitTemplateArgument(const TemplateArgument &Arg) {
768 switch (Arg.getKind()) {
769 case TemplateArgument::Null:
772 case TemplateArgument::Declaration:
773 Visit(Arg.getAsDecl());
776 case TemplateArgument::NullPtr:
779 case TemplateArgument::TemplateExpansion:
780 Out << 'P'; // pack expansion of...
782 case TemplateArgument::Template:
783 VisitTemplateName(Arg.getAsTemplateOrTemplatePattern());
786 case TemplateArgument::Expression:
787 // FIXME: Visit expressions.
790 case TemplateArgument::Pack:
791 Out << 'p' << Arg.pack_size();
792 for (const auto &P : Arg.pack_elements())
793 VisitTemplateArgument(P);
796 case TemplateArgument::Type:
797 VisitType(Arg.getAsType());
800 case TemplateArgument::Integral:
802 VisitType(Arg.getIntegralType());
803 Out << Arg.getAsIntegral();
808 //===----------------------------------------------------------------------===//
809 // USR generation functions.
810 //===----------------------------------------------------------------------===//
812 void clang::index::generateUSRForObjCClass(StringRef Cls, raw_ostream &OS) {
813 OS << "objc(cs)" << Cls;
816 void clang::index::generateUSRForObjCCategory(StringRef Cls, StringRef Cat,
818 OS << "objc(cy)" << Cls << '@' << Cat;
821 void clang::index::generateUSRForObjCIvar(StringRef Ivar, raw_ostream &OS) {
825 void clang::index::generateUSRForObjCMethod(StringRef Sel,
826 bool IsInstanceMethod,
828 OS << (IsInstanceMethod ? "(im)" : "(cm)") << Sel;
831 void clang::index::generateUSRForObjCProperty(StringRef Prop, raw_ostream &OS) {
832 OS << "(py)" << Prop;
835 void clang::index::generateUSRForObjCProtocol(StringRef Prot, raw_ostream &OS) {
836 OS << "objc(pl)" << Prot;
839 bool clang::index::generateUSRForDecl(const Decl *D,
840 SmallVectorImpl<char> &Buf) {
841 // Don't generate USRs for things with invalid locations.
842 if (!D || D->getLocStart().isInvalid())
845 USRGenerator UG(&D->getASTContext(), Buf);
847 return UG.ignoreResults();
850 bool clang::index::generateUSRForMacro(const MacroDefinitionRecord *MD,
851 const SourceManager &SM,
852 SmallVectorImpl<char> &Buf) {
853 // Don't generate USRs for things with invalid locations.
854 if (!MD || MD->getLocation().isInvalid())
857 llvm::raw_svector_ostream Out(Buf);
859 // Assume that system headers are sane. Don't put source location
860 // information into the USR if the macro comes from a system header.
861 SourceLocation Loc = MD->getLocation();
862 bool ShouldGenerateLocation = !SM.isInSystemHeader(Loc);
864 Out << getUSRSpacePrefix();
865 if (ShouldGenerateLocation)
866 printLoc(Out, Loc, SM, /*IncludeOffset=*/true);
868 Out << MD->getName()->getName();