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);
94 void VisitLinkageSpecDecl(const LinkageSpecDecl *D) {
98 void VisitUsingDirectiveDecl(const UsingDirectiveDecl *D) {
102 void VisitUsingDecl(const UsingDecl *D) {
103 IgnoreResults = true;
106 void VisitUnresolvedUsingValueDecl(const UnresolvedUsingValueDecl *D) {
107 IgnoreResults = true;
110 void VisitUnresolvedUsingTypenameDecl(const UnresolvedUsingTypenameDecl *D) {
111 IgnoreResults = true;
114 bool ShouldGenerateLocation(const NamedDecl *D);
116 bool isLocal(const NamedDecl *D) {
117 return D->getParentFunctionOrMethod() != nullptr;
120 /// Generate the string component containing the location of the
122 bool GenLoc(const Decl *D, bool IncludeOffset);
124 /// String generation methods used both by the visitation methods
125 /// and from other clients that want to directly generate USRs. These
126 /// methods do not construct complete USRs (which incorporate the parents
127 /// of an AST element), but only the fragments concerning the AST element
130 /// Generate a USR for an Objective-C class.
131 void GenObjCClass(StringRef cls) {
132 generateUSRForObjCClass(cls, Out);
135 /// Generate a USR for an Objective-C class category.
136 void GenObjCCategory(StringRef cls, StringRef cat) {
137 generateUSRForObjCCategory(cls, cat, Out);
140 /// Generate a USR fragment for an Objective-C property.
141 void GenObjCProperty(StringRef prop, bool isClassProp) {
142 generateUSRForObjCProperty(prop, isClassProp, Out);
145 /// Generate a USR for an Objective-C protocol.
146 void GenObjCProtocol(StringRef prot) {
147 generateUSRForObjCProtocol(prot, Out);
150 void VisitType(QualType T);
151 void VisitTemplateParameterList(const TemplateParameterList *Params);
152 void VisitTemplateName(TemplateName Name);
153 void VisitTemplateArgument(const TemplateArgument &Arg);
155 /// Emit a Decl's name using NamedDecl::printName() and return true if
156 /// the decl had no name.
157 bool EmitDeclName(const NamedDecl *D);
159 } // end anonymous namespace
161 //===----------------------------------------------------------------------===//
162 // Generating USRs from ASTS.
163 //===----------------------------------------------------------------------===//
165 bool USRGenerator::EmitDeclName(const NamedDecl *D) {
166 const unsigned startSize = Buf.size();
168 const unsigned endSize = Buf.size();
169 return startSize == endSize;
172 bool USRGenerator::ShouldGenerateLocation(const NamedDecl *D) {
173 if (D->isExternallyVisible())
175 if (D->getParentFunctionOrMethod())
177 const SourceManager &SM = Context->getSourceManager();
178 return !SM.isInSystemHeader(D->getLocation());
181 void USRGenerator::VisitDeclContext(const DeclContext *DC) {
182 if (const NamedDecl *D = dyn_cast<NamedDecl>(DC))
186 void USRGenerator::VisitFieldDecl(const FieldDecl *D) {
187 // The USR for an ivar declared in a class extension is based on the
188 // ObjCInterfaceDecl, not the ObjCCategoryDecl.
189 if (const ObjCInterfaceDecl *ID = Context->getObjContainingInterface(D))
192 VisitDeclContext(D->getDeclContext());
193 Out << (isa<ObjCIvarDecl>(D) ? "@" : "@FI@");
194 if (EmitDeclName(D)) {
195 // Bit fields can be anonymous.
196 IgnoreResults = true;
201 void USRGenerator::VisitFunctionDecl(const FunctionDecl *D) {
202 if (ShouldGenerateLocation(D) && GenLoc(D, /*IncludeOffset=*/isLocal(D)))
205 VisitDeclContext(D->getDeclContext());
206 bool IsTemplate = false;
207 if (FunctionTemplateDecl *FunTmpl = D->getDescribedFunctionTemplate()) {
210 VisitTemplateParameterList(FunTmpl->getTemplateParameters());
214 PrintingPolicy Policy(Context->getLangOpts());
215 // Forward references can have different template argument names. Suppress the
216 // template argument names in constructors to make their USR more stable.
217 Policy.SuppressTemplateArgsInCXXConstructors = true;
218 D->getDeclName().print(Out, Policy);
220 ASTContext &Ctx = *Context;
221 if ((!Ctx.getLangOpts().CPlusPlus || D->isExternC()) &&
222 !D->hasAttr<OverloadableAttr>())
225 if (const TemplateArgumentList *
226 SpecArgs = D->getTemplateSpecializationArgs()) {
228 for (unsigned I = 0, N = SpecArgs->size(); I != N; ++I) {
230 VisitTemplateArgument(SpecArgs->get(I));
235 // Mangle in type information for the arguments.
236 for (auto PD : D->parameters()) {
238 VisitType(PD->getType());
243 // Function templates can be overloaded by return type, for example:
245 // template <class T> typename T::A foo() {}
246 // template <class T> typename T::B foo() {}
249 VisitType(D->getReturnType());
252 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(D)) {
255 if (unsigned quals = MD->getTypeQualifiers())
256 Out << (char)('0' + quals);
257 switch (MD->getRefQualifier()) {
259 case RQ_LValue: Out << '&'; break;
260 case RQ_RValue: Out << "&&"; break;
265 void USRGenerator::VisitNamedDecl(const NamedDecl *D) {
266 VisitDeclContext(D->getDeclContext());
269 if (EmitDeclName(D)) {
270 // The string can be empty if the declaration has no name; e.g., it is
271 // the ParmDecl with no name for declaration of a function pointer type,
272 // e.g.: void (*f)(void *);
273 // In this case, don't generate a USR.
274 IgnoreResults = true;
278 void USRGenerator::VisitVarDecl(const VarDecl *D) {
279 // VarDecls can be declared 'extern' within a function or method body,
280 // but their enclosing DeclContext is the function, not the TU. We need
281 // to check the storage class to correctly generate the USR.
282 if (ShouldGenerateLocation(D) && GenLoc(D, /*IncludeOffset=*/isLocal(D)))
285 VisitDeclContext(D->getDeclContext());
287 // Variables always have simple names.
288 StringRef s = D->getName();
290 // The string can be empty if the declaration has no name; e.g., it is
291 // the ParmDecl with no name for declaration of a function pointer type, e.g.:
292 // void (*f)(void *);
293 // In this case, don't generate a USR.
295 IgnoreResults = true;
300 void USRGenerator::VisitNonTypeTemplateParmDecl(
301 const NonTypeTemplateParmDecl *D) {
302 GenLoc(D, /*IncludeOffset=*/true);
305 void USRGenerator::VisitTemplateTemplateParmDecl(
306 const TemplateTemplateParmDecl *D) {
307 GenLoc(D, /*IncludeOffset=*/true);
310 void USRGenerator::VisitNamespaceDecl(const NamespaceDecl *D) {
311 if (D->isAnonymousNamespace()) {
316 VisitDeclContext(D->getDeclContext());
318 Out << "@N@" << D->getName();
321 void USRGenerator::VisitFunctionTemplateDecl(const FunctionTemplateDecl *D) {
322 VisitFunctionDecl(D->getTemplatedDecl());
325 void USRGenerator::VisitClassTemplateDecl(const ClassTemplateDecl *D) {
326 VisitTagDecl(D->getTemplatedDecl());
329 void USRGenerator::VisitNamespaceAliasDecl(const NamespaceAliasDecl *D) {
330 VisitDeclContext(D->getDeclContext());
332 Out << "@NA@" << D->getName();
335 void USRGenerator::VisitObjCMethodDecl(const ObjCMethodDecl *D) {
336 const DeclContext *container = D->getDeclContext();
337 if (const ObjCProtocolDecl *pd = dyn_cast<ObjCProtocolDecl>(container)) {
341 // The USR for a method declared in a class extension or category is based on
342 // the ObjCInterfaceDecl, not the ObjCCategoryDecl.
343 const ObjCInterfaceDecl *ID = D->getClassInterface();
345 IgnoreResults = true;
350 // Ideally we would use 'GenObjCMethod', but this is such a hot path
351 // for Objective-C code that we don't want to use
352 // DeclarationName::getAsString().
353 Out << (D->isInstanceMethod() ? "(im)" : "(cm)")
354 << DeclarationName(D->getSelector());
357 void USRGenerator::VisitObjCContainerDecl(const ObjCContainerDecl *D) {
358 switch (D->getKind()) {
360 llvm_unreachable("Invalid ObjC container.");
361 case Decl::ObjCInterface:
362 case Decl::ObjCImplementation:
363 GenObjCClass(D->getName());
365 case Decl::ObjCCategory: {
366 const ObjCCategoryDecl *CD = cast<ObjCCategoryDecl>(D);
367 const ObjCInterfaceDecl *ID = CD->getClassInterface();
369 // Handle invalid code where the @interface might not
370 // have been specified.
371 // FIXME: We should be able to generate this USR even if the
372 // @interface isn't available.
373 IgnoreResults = true;
376 // Specially handle class extensions, which are anonymous categories.
377 // We want to mangle in the location to uniquely distinguish them.
378 if (CD->IsClassExtension()) {
379 Out << "objc(ext)" << ID->getName() << '@';
380 GenLoc(CD, /*IncludeOffset=*/true);
383 GenObjCCategory(ID->getName(), CD->getName());
387 case Decl::ObjCCategoryImpl: {
388 const ObjCCategoryImplDecl *CD = cast<ObjCCategoryImplDecl>(D);
389 const ObjCInterfaceDecl *ID = CD->getClassInterface();
391 // Handle invalid code where the @interface might not
392 // have been specified.
393 // FIXME: We should be able to generate this USR even if the
394 // @interface isn't available.
395 IgnoreResults = true;
398 GenObjCCategory(ID->getName(), CD->getName());
401 case Decl::ObjCProtocol:
402 GenObjCProtocol(cast<ObjCProtocolDecl>(D)->getName());
407 void USRGenerator::VisitObjCPropertyDecl(const ObjCPropertyDecl *D) {
408 // The USR for a property declared in a class extension or category is based
409 // on the ObjCInterfaceDecl, not the ObjCCategoryDecl.
410 if (const ObjCInterfaceDecl *ID = Context->getObjContainingInterface(D))
413 Visit(cast<Decl>(D->getDeclContext()));
414 GenObjCProperty(D->getName(), D->isClassProperty());
417 void USRGenerator::VisitObjCPropertyImplDecl(const ObjCPropertyImplDecl *D) {
418 if (ObjCPropertyDecl *PD = D->getPropertyDecl()) {
419 VisitObjCPropertyDecl(PD);
423 IgnoreResults = true;
426 void USRGenerator::VisitTagDecl(const TagDecl *D) {
427 // Add the location of the tag decl to handle resolution across
428 // translation units.
429 if (!isa<EnumDecl>(D) &&
430 ShouldGenerateLocation(D) && GenLoc(D, /*IncludeOffset=*/isLocal(D)))
433 D = D->getCanonicalDecl();
434 VisitDeclContext(D->getDeclContext());
436 bool AlreadyStarted = false;
437 if (const CXXRecordDecl *CXXRecord = dyn_cast<CXXRecordDecl>(D)) {
438 if (ClassTemplateDecl *ClassTmpl = CXXRecord->getDescribedClassTemplate()) {
439 AlreadyStarted = true;
441 switch (D->getTagKind()) {
444 case TTK_Struct: Out << "@ST"; break;
445 case TTK_Union: Out << "@UT"; break;
446 case TTK_Enum: llvm_unreachable("enum template");
448 VisitTemplateParameterList(ClassTmpl->getTemplateParameters());
449 } else if (const ClassTemplatePartialSpecializationDecl *PartialSpec
450 = dyn_cast<ClassTemplatePartialSpecializationDecl>(CXXRecord)) {
451 AlreadyStarted = true;
453 switch (D->getTagKind()) {
456 case TTK_Struct: Out << "@SP"; break;
457 case TTK_Union: Out << "@UP"; break;
458 case TTK_Enum: llvm_unreachable("enum partial specialization");
460 VisitTemplateParameterList(PartialSpec->getTemplateParameters());
464 if (!AlreadyStarted) {
465 switch (D->getTagKind()) {
468 case TTK_Struct: Out << "@S"; break;
469 case TTK_Union: Out << "@U"; break;
470 case TTK_Enum: Out << "@E"; break;
475 assert(Buf.size() > 0);
476 const unsigned off = Buf.size() - 1;
478 if (EmitDeclName(D)) {
479 if (const TypedefNameDecl *TD = D->getTypedefNameForAnonDecl()) {
484 if (D->isEmbeddedInDeclarator() && !D->isFreeStanding()) {
485 printLoc(Out, D->getLocation(), Context->getSourceManager(), true);
488 if (auto *ED = dyn_cast<EnumDecl>(D)) {
489 // Distinguish USRs of anonymous enums by using their first enumerator.
490 auto enum_range = ED->enumerators();
491 if (enum_range.begin() != enum_range.end()) {
492 Out << '@' << **enum_range.begin();
499 // For a class template specialization, mangle the template arguments.
500 if (const ClassTemplateSpecializationDecl *Spec
501 = dyn_cast<ClassTemplateSpecializationDecl>(D)) {
502 const TemplateArgumentList &Args = Spec->getTemplateInstantiationArgs();
504 for (unsigned I = 0, N = Args.size(); I != N; ++I) {
506 VisitTemplateArgument(Args.get(I));
511 void USRGenerator::VisitTypedefDecl(const TypedefDecl *D) {
512 if (ShouldGenerateLocation(D) && GenLoc(D, /*IncludeOffset=*/isLocal(D)))
514 const DeclContext *DC = D->getDeclContext();
515 if (const NamedDecl *DCN = dyn_cast<NamedDecl>(DC))
521 void USRGenerator::VisitTemplateTypeParmDecl(const TemplateTypeParmDecl *D) {
522 GenLoc(D, /*IncludeOffset=*/true);
525 bool USRGenerator::GenLoc(const Decl *D, bool IncludeOffset) {
527 return IgnoreResults;
530 // Guard against null declarations in invalid code.
532 IgnoreResults = true;
536 // Use the location of canonical decl.
537 D = D->getCanonicalDecl();
540 IgnoreResults || printLoc(Out, D->getLocStart(),
541 Context->getSourceManager(), IncludeOffset);
543 return IgnoreResults;
546 void USRGenerator::VisitType(QualType T) {
547 // This method mangles in USR information for types. It can possibly
548 // just reuse the naming-mangling logic used by codegen, although the
549 // requirements for USRs might not be the same.
550 ASTContext &Ctx = *Context;
553 T = Ctx.getCanonicalType(T);
554 Qualifiers Q = T.getQualifiers();
563 Out << ((char) ('0' + qVal));
565 // Mangle in ObjC GC qualifiers?
567 if (const PackExpansionType *Expansion = T->getAs<PackExpansionType>()) {
569 T = Expansion->getPattern();
572 if (const BuiltinType *BT = T->getAs<BuiltinType>()) {
573 unsigned char c = '\0';
574 switch (BT->getKind()) {
575 case BuiltinType::Void:
577 case BuiltinType::Bool:
579 case BuiltinType::UChar:
581 case BuiltinType::Char16:
583 case BuiltinType::Char32:
585 case BuiltinType::UShort:
587 case BuiltinType::UInt:
589 case BuiltinType::ULong:
591 case BuiltinType::ULongLong:
593 case BuiltinType::UInt128:
595 case BuiltinType::Char_U:
596 case BuiltinType::Char_S:
598 case BuiltinType::SChar:
600 case BuiltinType::WChar_S:
601 case BuiltinType::WChar_U:
603 case BuiltinType::Short:
605 case BuiltinType::Int:
607 case BuiltinType::Long:
609 case BuiltinType::LongLong:
611 case BuiltinType::Int128:
613 case BuiltinType::Half:
615 case BuiltinType::Float:
617 case BuiltinType::Double:
619 case BuiltinType::LongDouble:
621 case BuiltinType::Float128:
623 case BuiltinType::NullPtr:
625 #define BUILTIN_TYPE(Id, SingletonId)
626 #define PLACEHOLDER_TYPE(Id, SingletonId) case BuiltinType::Id:
627 #include "clang/AST/BuiltinTypes.def"
628 case BuiltinType::Dependent:
629 #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
630 case BuiltinType::Id:
631 #include "clang/Basic/OpenCLImageTypes.def"
632 case BuiltinType::OCLEvent:
633 case BuiltinType::OCLClkEvent:
634 case BuiltinType::OCLQueue:
635 case BuiltinType::OCLNDRange:
636 case BuiltinType::OCLReserveID:
637 case BuiltinType::OCLSampler:
638 IgnoreResults = true;
640 case BuiltinType::ObjCId:
642 case BuiltinType::ObjCClass:
644 case BuiltinType::ObjCSel:
651 // If we have already seen this (non-built-in) type, use a substitution
653 llvm::DenseMap<const Type *, unsigned>::iterator Substitution
654 = TypeSubstitutions.find(T.getTypePtr());
655 if (Substitution != TypeSubstitutions.end()) {
656 Out << 'S' << Substitution->second << '_';
659 // Record this as a substitution.
660 unsigned Number = TypeSubstitutions.size();
661 TypeSubstitutions[T.getTypePtr()] = Number;
664 if (const PointerType *PT = T->getAs<PointerType>()) {
666 T = PT->getPointeeType();
669 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) {
671 T = OPT->getPointeeType();
674 if (const RValueReferenceType *RT = T->getAs<RValueReferenceType>()) {
676 T = RT->getPointeeType();
679 if (const ReferenceType *RT = T->getAs<ReferenceType>()) {
681 T = RT->getPointeeType();
684 if (const FunctionProtoType *FT = T->getAs<FunctionProtoType>()) {
686 VisitType(FT->getReturnType());
687 for (const auto &I : FT->param_types())
689 if (FT->isVariadic())
693 if (const BlockPointerType *BT = T->getAs<BlockPointerType>()) {
695 T = BT->getPointeeType();
698 if (const ComplexType *CT = T->getAs<ComplexType>()) {
700 T = CT->getElementType();
703 if (const TagType *TT = T->getAs<TagType>()) {
705 VisitTagDecl(TT->getDecl());
708 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) {
710 VisitObjCInterfaceDecl(OIT->getDecl());
713 if (const ObjCObjectType *OIT = T->getAs<ObjCObjectType>()) {
715 VisitType(OIT->getBaseType());
716 for (auto *Prot : OIT->getProtocols())
717 VisitObjCProtocolDecl(Prot);
720 if (const TemplateTypeParmType *TTP = T->getAs<TemplateTypeParmType>()) {
721 Out << 't' << TTP->getDepth() << '.' << TTP->getIndex();
724 if (const TemplateSpecializationType *Spec
725 = T->getAs<TemplateSpecializationType>()) {
727 VisitTemplateName(Spec->getTemplateName());
728 Out << Spec->getNumArgs();
729 for (unsigned I = 0, N = Spec->getNumArgs(); I != N; ++I)
730 VisitTemplateArgument(Spec->getArg(I));
733 if (const DependentNameType *DNT = T->getAs<DependentNameType>()) {
735 // FIXME: Encode the qualifier, don't just print it.
736 PrintingPolicy PO(Ctx.getLangOpts());
737 PO.SuppressTagKeyword = true;
738 PO.SuppressUnwrittenScope = true;
739 PO.ConstantArraySizeAsWritten = false;
740 PO.AnonymousTagLocations = false;
741 DNT->getQualifier()->print(Out, PO);
742 Out << ':' << DNT->getIdentifier()->getName();
745 if (const InjectedClassNameType *InjT = T->getAs<InjectedClassNameType>()) {
746 T = InjT->getInjectedSpecializationType();
756 void USRGenerator::VisitTemplateParameterList(
757 const TemplateParameterList *Params) {
760 Out << '>' << Params->size();
761 for (TemplateParameterList::const_iterator P = Params->begin(),
762 PEnd = Params->end();
765 if (isa<TemplateTypeParmDecl>(*P)) {
766 if (cast<TemplateTypeParmDecl>(*P)->isParameterPack())
772 if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(*P)) {
773 if (NTTP->isParameterPack())
776 VisitType(NTTP->getType());
780 TemplateTemplateParmDecl *TTP = cast<TemplateTemplateParmDecl>(*P);
781 if (TTP->isParameterPack())
784 VisitTemplateParameterList(TTP->getTemplateParameters());
788 void USRGenerator::VisitTemplateName(TemplateName Name) {
789 if (TemplateDecl *Template = Name.getAsTemplateDecl()) {
790 if (TemplateTemplateParmDecl *TTP
791 = dyn_cast<TemplateTemplateParmDecl>(Template)) {
792 Out << 't' << TTP->getDepth() << '.' << TTP->getIndex();
800 // FIXME: Visit dependent template names.
803 void USRGenerator::VisitTemplateArgument(const TemplateArgument &Arg) {
804 switch (Arg.getKind()) {
805 case TemplateArgument::Null:
808 case TemplateArgument::Declaration:
809 Visit(Arg.getAsDecl());
812 case TemplateArgument::NullPtr:
815 case TemplateArgument::TemplateExpansion:
816 Out << 'P'; // pack expansion of...
818 case TemplateArgument::Template:
819 VisitTemplateName(Arg.getAsTemplateOrTemplatePattern());
822 case TemplateArgument::Expression:
823 // FIXME: Visit expressions.
826 case TemplateArgument::Pack:
827 Out << 'p' << Arg.pack_size();
828 for (const auto &P : Arg.pack_elements())
829 VisitTemplateArgument(P);
832 case TemplateArgument::Type:
833 VisitType(Arg.getAsType());
836 case TemplateArgument::Integral:
838 VisitType(Arg.getIntegralType());
839 Out << Arg.getAsIntegral();
844 //===----------------------------------------------------------------------===//
845 // USR generation functions.
846 //===----------------------------------------------------------------------===//
848 void clang::index::generateUSRForObjCClass(StringRef Cls, raw_ostream &OS) {
849 OS << "objc(cs)" << Cls;
852 void clang::index::generateUSRForObjCCategory(StringRef Cls, StringRef Cat,
854 OS << "objc(cy)" << Cls << '@' << Cat;
857 void clang::index::generateUSRForObjCIvar(StringRef Ivar, raw_ostream &OS) {
861 void clang::index::generateUSRForObjCMethod(StringRef Sel,
862 bool IsInstanceMethod,
864 OS << (IsInstanceMethod ? "(im)" : "(cm)") << Sel;
867 void clang::index::generateUSRForObjCProperty(StringRef Prop, bool isClassProp,
869 OS << (isClassProp ? "(cpy)" : "(py)") << Prop;
872 void clang::index::generateUSRForObjCProtocol(StringRef Prot, raw_ostream &OS) {
873 OS << "objc(pl)" << Prot;
876 bool clang::index::generateUSRForDecl(const Decl *D,
877 SmallVectorImpl<char> &Buf) {
878 // Don't generate USRs for things with invalid locations.
879 if (!D || D->getLocStart().isInvalid())
882 USRGenerator UG(&D->getASTContext(), Buf);
884 return UG.ignoreResults();
887 bool clang::index::generateUSRForMacro(const MacroDefinitionRecord *MD,
888 const SourceManager &SM,
889 SmallVectorImpl<char> &Buf) {
890 // Don't generate USRs for things with invalid locations.
891 if (!MD || MD->getLocation().isInvalid())
894 llvm::raw_svector_ostream Out(Buf);
896 // Assume that system headers are sane. Don't put source location
897 // information into the USR if the macro comes from a system header.
898 SourceLocation Loc = MD->getLocation();
899 bool ShouldGenerateLocation = !SM.isInSystemHeader(Loc);
901 Out << getUSRSpacePrefix();
902 if (ShouldGenerateLocation)
903 printLoc(Out, Loc, SM, /*IncludeOffset=*/true);
905 Out << MD->getName()->getName();