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-rw-r--r--lib/Index/USRGeneration.cpp803
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diff --git a/lib/Index/USRGeneration.cpp b/lib/Index/USRGeneration.cpp
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+++ b/lib/Index/USRGeneration.cpp
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+//===- USRGeneration.cpp - Routines for USR generation --------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Index/USRGeneration.h"
+#include "clang/AST/ASTContext.h"
+#include "clang/AST/DeclTemplate.h"
+#include "clang/AST/DeclVisitor.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/Support/Path.h"
+#include "llvm/Support/raw_ostream.h"
+
+using namespace clang;
+using namespace clang::index;
+
+//===----------------------------------------------------------------------===//
+// USR generation.
+//===----------------------------------------------------------------------===//
+
+namespace {
+class USRGenerator : public ConstDeclVisitor<USRGenerator> {
+ SmallVectorImpl<char> &Buf;
+ llvm::raw_svector_ostream Out;
+ bool IgnoreResults;
+ ASTContext *Context;
+ bool generatedLoc;
+
+ llvm::DenseMap<const Type *, unsigned> TypeSubstitutions;
+
+public:
+ explicit USRGenerator(ASTContext *Ctx, SmallVectorImpl<char> &Buf)
+ : Buf(Buf),
+ Out(Buf),
+ IgnoreResults(false),
+ Context(Ctx),
+ generatedLoc(false)
+ {
+ // Add the USR space prefix.
+ Out << getUSRSpacePrefix();
+ }
+
+ bool ignoreResults() const { return IgnoreResults; }
+
+ // Visitation methods from generating USRs from AST elements.
+ void VisitDeclContext(const DeclContext *D);
+ void VisitFieldDecl(const FieldDecl *D);
+ void VisitFunctionDecl(const FunctionDecl *D);
+ void VisitNamedDecl(const NamedDecl *D);
+ void VisitNamespaceDecl(const NamespaceDecl *D);
+ void VisitNamespaceAliasDecl(const NamespaceAliasDecl *D);
+ void VisitFunctionTemplateDecl(const FunctionTemplateDecl *D);
+ void VisitClassTemplateDecl(const ClassTemplateDecl *D);
+ void VisitObjCContainerDecl(const ObjCContainerDecl *CD);
+ void VisitObjCMethodDecl(const ObjCMethodDecl *MD);
+ void VisitObjCPropertyDecl(const ObjCPropertyDecl *D);
+ void VisitObjCPropertyImplDecl(const ObjCPropertyImplDecl *D);
+ void VisitTagDecl(const TagDecl *D);
+ void VisitTypedefDecl(const TypedefDecl *D);
+ void VisitTemplateTypeParmDecl(const TemplateTypeParmDecl *D);
+ void VisitVarDecl(const VarDecl *D);
+ void VisitNonTypeTemplateParmDecl(const NonTypeTemplateParmDecl *D);
+ void VisitTemplateTemplateParmDecl(const TemplateTemplateParmDecl *D);
+ void VisitLinkageSpecDecl(const LinkageSpecDecl *D) {
+ IgnoreResults = true;
+ }
+ void VisitUsingDirectiveDecl(const UsingDirectiveDecl *D) {
+ IgnoreResults = true;
+ }
+ void VisitUsingDecl(const UsingDecl *D) {
+ IgnoreResults = true;
+ }
+ void VisitUnresolvedUsingValueDecl(const UnresolvedUsingValueDecl *D) {
+ IgnoreResults = true;
+ }
+ void VisitUnresolvedUsingTypenameDecl(const UnresolvedUsingTypenameDecl *D) {
+ IgnoreResults = true;
+ }
+
+ /// Generate the string component containing the location of the
+ /// declaration.
+ bool GenLoc(const Decl *D);
+
+ /// String generation methods used both by the visitation methods
+ /// and from other clients that want to directly generate USRs. These
+ /// methods do not construct complete USRs (which incorporate the parents
+ /// of an AST element), but only the fragments concerning the AST element
+ /// itself.
+
+ /// Generate a USR for an Objective-C class.
+ void GenObjCClass(StringRef cls) {
+ generateUSRForObjCClass(cls, Out);
+ }
+ /// Generate a USR for an Objective-C class category.
+ void GenObjCCategory(StringRef cls, StringRef cat) {
+ generateUSRForObjCCategory(cls, cat, Out);
+ }
+ /// Generate a USR fragment for an Objective-C instance variable. The
+ /// complete USR can be created by concatenating the USR for the
+ /// encompassing class with this USR fragment.
+ void GenObjCIvar(StringRef ivar) {
+ generateUSRForObjCIvar(ivar, Out);
+ }
+ /// Generate a USR fragment for an Objective-C method.
+ void GenObjCMethod(StringRef sel, bool isInstanceMethod) {
+ generateUSRForObjCMethod(sel, isInstanceMethod, Out);
+ }
+ /// Generate a USR fragment for an Objective-C property.
+ void GenObjCProperty(StringRef prop) {
+ generateUSRForObjCProperty(prop, Out);
+ }
+ /// Generate a USR for an Objective-C protocol.
+ void GenObjCProtocol(StringRef prot) {
+ generateUSRForObjCProtocol(prot, Out);
+ }
+
+ void VisitType(QualType T);
+ void VisitTemplateParameterList(const TemplateParameterList *Params);
+ void VisitTemplateName(TemplateName Name);
+ void VisitTemplateArgument(const TemplateArgument &Arg);
+
+ /// Emit a Decl's name using NamedDecl::printName() and return true if
+ /// the decl had no name.
+ bool EmitDeclName(const NamedDecl *D);
+};
+
+} // end anonymous namespace
+
+//===----------------------------------------------------------------------===//
+// Generating USRs from ASTS.
+//===----------------------------------------------------------------------===//
+
+bool USRGenerator::EmitDeclName(const NamedDecl *D) {
+ Out.flush();
+ const unsigned startSize = Buf.size();
+ D->printName(Out);
+ Out.flush();
+ const unsigned endSize = Buf.size();
+ return startSize == endSize;
+}
+
+static inline bool ShouldGenerateLocation(const NamedDecl *D) {
+ return !D->isExternallyVisible();
+}
+
+void USRGenerator::VisitDeclContext(const DeclContext *DC) {
+ if (const NamedDecl *D = dyn_cast<NamedDecl>(DC))
+ Visit(D);
+}
+
+void USRGenerator::VisitFieldDecl(const FieldDecl *D) {
+ // The USR for an ivar declared in a class extension is based on the
+ // ObjCInterfaceDecl, not the ObjCCategoryDecl.
+ if (const ObjCInterfaceDecl *ID = Context->getObjContainingInterface(D))
+ Visit(ID);
+ else
+ VisitDeclContext(D->getDeclContext());
+ Out << (isa<ObjCIvarDecl>(D) ? "@" : "@FI@");
+ if (EmitDeclName(D)) {
+ // Bit fields can be anonymous.
+ IgnoreResults = true;
+ return;
+ }
+}
+
+void USRGenerator::VisitFunctionDecl(const FunctionDecl *D) {
+ if (ShouldGenerateLocation(D) && GenLoc(D))
+ return;
+
+ VisitDeclContext(D->getDeclContext());
+ if (FunctionTemplateDecl *FunTmpl = D->getDescribedFunctionTemplate()) {
+ Out << "@FT@";
+ VisitTemplateParameterList(FunTmpl->getTemplateParameters());
+ } else
+ Out << "@F@";
+ D->printName(Out);
+
+ ASTContext &Ctx = *Context;
+ if (!Ctx.getLangOpts().CPlusPlus || D->isExternC())
+ return;
+
+ if (const TemplateArgumentList *
+ SpecArgs = D->getTemplateSpecializationArgs()) {
+ Out << '<';
+ for (unsigned I = 0, N = SpecArgs->size(); I != N; ++I) {
+ Out << '#';
+ VisitTemplateArgument(SpecArgs->get(I));
+ }
+ Out << '>';
+ }
+
+ // Mangle in type information for the arguments.
+ for (FunctionDecl::param_const_iterator I = D->param_begin(),
+ E = D->param_end();
+ I != E; ++I) {
+ Out << '#';
+ if (ParmVarDecl *PD = *I)
+ VisitType(PD->getType());
+ }
+ if (D->isVariadic())
+ Out << '.';
+ Out << '#';
+ if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(D)) {
+ if (MD->isStatic())
+ Out << 'S';
+ if (unsigned quals = MD->getTypeQualifiers())
+ Out << (char)('0' + quals);
+ }
+}
+
+void USRGenerator::VisitNamedDecl(const NamedDecl *D) {
+ VisitDeclContext(D->getDeclContext());
+ Out << "@";
+
+ if (EmitDeclName(D)) {
+ // The string can be empty if the declaration has no name; e.g., it is
+ // the ParmDecl with no name for declaration of a function pointer type,
+ // e.g.: void (*f)(void *);
+ // In this case, don't generate a USR.
+ IgnoreResults = true;
+ }
+}
+
+void USRGenerator::VisitVarDecl(const VarDecl *D) {
+ // VarDecls can be declared 'extern' within a function or method body,
+ // but their enclosing DeclContext is the function, not the TU. We need
+ // to check the storage class to correctly generate the USR.
+ if (ShouldGenerateLocation(D) && GenLoc(D))
+ return;
+
+ VisitDeclContext(D->getDeclContext());
+
+ // Variables always have simple names.
+ StringRef s = D->getName();
+
+ // The string can be empty if the declaration has no name; e.g., it is
+ // the ParmDecl with no name for declaration of a function pointer type, e.g.:
+ // void (*f)(void *);
+ // In this case, don't generate a USR.
+ if (s.empty())
+ IgnoreResults = true;
+ else
+ Out << '@' << s;
+}
+
+void USRGenerator::VisitNonTypeTemplateParmDecl(
+ const NonTypeTemplateParmDecl *D) {
+ GenLoc(D);
+ return;
+}
+
+void USRGenerator::VisitTemplateTemplateParmDecl(
+ const TemplateTemplateParmDecl *D) {
+ GenLoc(D);
+ return;
+}
+
+void USRGenerator::VisitNamespaceDecl(const NamespaceDecl *D) {
+ if (D->isAnonymousNamespace()) {
+ Out << "@aN";
+ return;
+ }
+
+ VisitDeclContext(D->getDeclContext());
+ if (!IgnoreResults)
+ Out << "@N@" << D->getName();
+}
+
+void USRGenerator::VisitFunctionTemplateDecl(const FunctionTemplateDecl *D) {
+ VisitFunctionDecl(D->getTemplatedDecl());
+}
+
+void USRGenerator::VisitClassTemplateDecl(const ClassTemplateDecl *D) {
+ VisitTagDecl(D->getTemplatedDecl());
+}
+
+void USRGenerator::VisitNamespaceAliasDecl(const NamespaceAliasDecl *D) {
+ VisitDeclContext(D->getDeclContext());
+ if (!IgnoreResults)
+ Out << "@NA@" << D->getName();
+}
+
+void USRGenerator::VisitObjCMethodDecl(const ObjCMethodDecl *D) {
+ const DeclContext *container = D->getDeclContext();
+ if (const ObjCProtocolDecl *pd = dyn_cast<ObjCProtocolDecl>(container)) {
+ Visit(pd);
+ }
+ else {
+ // The USR for a method declared in a class extension or category is based on
+ // the ObjCInterfaceDecl, not the ObjCCategoryDecl.
+ const ObjCInterfaceDecl *ID = D->getClassInterface();
+ if (!ID) {
+ IgnoreResults = true;
+ return;
+ }
+ Visit(ID);
+ }
+ // Ideally we would use 'GenObjCMethod', but this is such a hot path
+ // for Objective-C code that we don't want to use
+ // DeclarationName::getAsString().
+ Out << (D->isInstanceMethod() ? "(im)" : "(cm)")
+ << DeclarationName(D->getSelector());
+}
+
+void USRGenerator::VisitObjCContainerDecl(const ObjCContainerDecl *D) {
+ switch (D->getKind()) {
+ default:
+ llvm_unreachable("Invalid ObjC container.");
+ case Decl::ObjCInterface:
+ case Decl::ObjCImplementation:
+ GenObjCClass(D->getName());
+ break;
+ case Decl::ObjCCategory: {
+ const ObjCCategoryDecl *CD = cast<ObjCCategoryDecl>(D);
+ const ObjCInterfaceDecl *ID = CD->getClassInterface();
+ if (!ID) {
+ // Handle invalid code where the @interface might not
+ // have been specified.
+ // FIXME: We should be able to generate this USR even if the
+ // @interface isn't available.
+ IgnoreResults = true;
+ return;
+ }
+ // Specially handle class extensions, which are anonymous categories.
+ // We want to mangle in the location to uniquely distinguish them.
+ if (CD->IsClassExtension()) {
+ Out << "objc(ext)" << ID->getName() << '@';
+ GenLoc(CD);
+ }
+ else
+ GenObjCCategory(ID->getName(), CD->getName());
+
+ break;
+ }
+ case Decl::ObjCCategoryImpl: {
+ const ObjCCategoryImplDecl *CD = cast<ObjCCategoryImplDecl>(D);
+ const ObjCInterfaceDecl *ID = CD->getClassInterface();
+ if (!ID) {
+ // Handle invalid code where the @interface might not
+ // have been specified.
+ // FIXME: We should be able to generate this USR even if the
+ // @interface isn't available.
+ IgnoreResults = true;
+ return;
+ }
+ GenObjCCategory(ID->getName(), CD->getName());
+ break;
+ }
+ case Decl::ObjCProtocol:
+ GenObjCProtocol(cast<ObjCProtocolDecl>(D)->getName());
+ break;
+ }
+}
+
+void USRGenerator::VisitObjCPropertyDecl(const ObjCPropertyDecl *D) {
+ // The USR for a property declared in a class extension or category is based
+ // on the ObjCInterfaceDecl, not the ObjCCategoryDecl.
+ if (const ObjCInterfaceDecl *ID = Context->getObjContainingInterface(D))
+ Visit(ID);
+ else
+ Visit(cast<Decl>(D->getDeclContext()));
+ GenObjCProperty(D->getName());
+}
+
+void USRGenerator::VisitObjCPropertyImplDecl(const ObjCPropertyImplDecl *D) {
+ if (ObjCPropertyDecl *PD = D->getPropertyDecl()) {
+ VisitObjCPropertyDecl(PD);
+ return;
+ }
+
+ IgnoreResults = true;
+}
+
+void USRGenerator::VisitTagDecl(const TagDecl *D) {
+ // Add the location of the tag decl to handle resolution across
+ // translation units.
+ if (ShouldGenerateLocation(D) && GenLoc(D))
+ return;
+
+ D = D->getCanonicalDecl();
+ VisitDeclContext(D->getDeclContext());
+
+ bool AlreadyStarted = false;
+ if (const CXXRecordDecl *CXXRecord = dyn_cast<CXXRecordDecl>(D)) {
+ if (ClassTemplateDecl *ClassTmpl = CXXRecord->getDescribedClassTemplate()) {
+ AlreadyStarted = true;
+
+ switch (D->getTagKind()) {
+ case TTK_Interface:
+ case TTK_Struct: Out << "@ST"; break;
+ case TTK_Class: Out << "@CT"; break;
+ case TTK_Union: Out << "@UT"; break;
+ case TTK_Enum: llvm_unreachable("enum template");
+ }
+ VisitTemplateParameterList(ClassTmpl->getTemplateParameters());
+ } else if (const ClassTemplatePartialSpecializationDecl *PartialSpec
+ = dyn_cast<ClassTemplatePartialSpecializationDecl>(CXXRecord)) {
+ AlreadyStarted = true;
+
+ switch (D->getTagKind()) {
+ case TTK_Interface:
+ case TTK_Struct: Out << "@SP"; break;
+ case TTK_Class: Out << "@CP"; break;
+ case TTK_Union: Out << "@UP"; break;
+ case TTK_Enum: llvm_unreachable("enum partial specialization");
+ }
+ VisitTemplateParameterList(PartialSpec->getTemplateParameters());
+ }
+ }
+
+ if (!AlreadyStarted) {
+ switch (D->getTagKind()) {
+ case TTK_Interface:
+ case TTK_Struct: Out << "@S"; break;
+ case TTK_Class: Out << "@C"; break;
+ case TTK_Union: Out << "@U"; break;
+ case TTK_Enum: Out << "@E"; break;
+ }
+ }
+
+ Out << '@';
+ Out.flush();
+ assert(Buf.size() > 0);
+ const unsigned off = Buf.size() - 1;
+
+ if (EmitDeclName(D)) {
+ if (const TypedefNameDecl *TD = D->getTypedefNameForAnonDecl()) {
+ Buf[off] = 'A';
+ Out << '@' << *TD;
+ }
+ else
+ Buf[off] = 'a';
+ }
+
+ // For a class template specialization, mangle the template arguments.
+ if (const ClassTemplateSpecializationDecl *Spec
+ = dyn_cast<ClassTemplateSpecializationDecl>(D)) {
+ const TemplateArgumentList &Args = Spec->getTemplateInstantiationArgs();
+ Out << '>';
+ for (unsigned I = 0, N = Args.size(); I != N; ++I) {
+ Out << '#';
+ VisitTemplateArgument(Args.get(I));
+ }
+ }
+}
+
+void USRGenerator::VisitTypedefDecl(const TypedefDecl *D) {
+ if (ShouldGenerateLocation(D) && GenLoc(D))
+ return;
+ const DeclContext *DC = D->getDeclContext();
+ if (const NamedDecl *DCN = dyn_cast<NamedDecl>(DC))
+ Visit(DCN);
+ Out << "@T@";
+ Out << D->getName();
+}
+
+void USRGenerator::VisitTemplateTypeParmDecl(const TemplateTypeParmDecl *D) {
+ GenLoc(D);
+ return;
+}
+
+bool USRGenerator::GenLoc(const Decl *D) {
+ if (generatedLoc)
+ return IgnoreResults;
+ generatedLoc = true;
+
+ // Guard against null declarations in invalid code.
+ if (!D) {
+ IgnoreResults = true;
+ return true;
+ }
+
+ // Use the location of canonical decl.
+ D = D->getCanonicalDecl();
+
+ const SourceManager &SM = Context->getSourceManager();
+ SourceLocation L = D->getLocStart();
+ if (L.isInvalid()) {
+ IgnoreResults = true;
+ return true;
+ }
+ L = SM.getExpansionLoc(L);
+ const std::pair<FileID, unsigned> &Decomposed = SM.getDecomposedLoc(L);
+ const FileEntry *FE = SM.getFileEntryForID(Decomposed.first);
+ if (FE) {
+ Out << llvm::sys::path::filename(FE->getName());
+ }
+ else {
+ // This case really isn't interesting.
+ IgnoreResults = true;
+ return true;
+ }
+ // Use the offest into the FileID to represent the location. Using
+ // a line/column can cause us to look back at the original source file,
+ // which is expensive.
+ Out << '@' << Decomposed.second;
+ return IgnoreResults;
+}
+
+void USRGenerator::VisitType(QualType T) {
+ // This method mangles in USR information for types. It can possibly
+ // just reuse the naming-mangling logic used by codegen, although the
+ // requirements for USRs might not be the same.
+ ASTContext &Ctx = *Context;
+
+ do {
+ T = Ctx.getCanonicalType(T);
+ Qualifiers Q = T.getQualifiers();
+ unsigned qVal = 0;
+ if (Q.hasConst())
+ qVal |= 0x1;
+ if (Q.hasVolatile())
+ qVal |= 0x2;
+ if (Q.hasRestrict())
+ qVal |= 0x4;
+ if(qVal)
+ Out << ((char) ('0' + qVal));
+
+ // Mangle in ObjC GC qualifiers?
+
+ if (const PackExpansionType *Expansion = T->getAs<PackExpansionType>()) {
+ Out << 'P';
+ T = Expansion->getPattern();
+ }
+
+ if (const BuiltinType *BT = T->getAs<BuiltinType>()) {
+ unsigned char c = '\0';
+ switch (BT->getKind()) {
+ case BuiltinType::Void:
+ c = 'v'; break;
+ case BuiltinType::Bool:
+ c = 'b'; break;
+ case BuiltinType::Char_U:
+ case BuiltinType::UChar:
+ c = 'c'; break;
+ case BuiltinType::Char16:
+ c = 'q'; break;
+ case BuiltinType::Char32:
+ c = 'w'; break;
+ case BuiltinType::UShort:
+ c = 's'; break;
+ case BuiltinType::UInt:
+ c = 'i'; break;
+ case BuiltinType::ULong:
+ c = 'l'; break;
+ case BuiltinType::ULongLong:
+ c = 'k'; break;
+ case BuiltinType::UInt128:
+ c = 'j'; break;
+ case BuiltinType::Char_S:
+ case BuiltinType::SChar:
+ c = 'C'; break;
+ case BuiltinType::WChar_S:
+ case BuiltinType::WChar_U:
+ c = 'W'; break;
+ case BuiltinType::Short:
+ c = 'S'; break;
+ case BuiltinType::Int:
+ c = 'I'; break;
+ case BuiltinType::Long:
+ c = 'L'; break;
+ case BuiltinType::LongLong:
+ c = 'K'; break;
+ case BuiltinType::Int128:
+ c = 'J'; break;
+ case BuiltinType::Half:
+ c = 'h'; break;
+ case BuiltinType::Float:
+ c = 'f'; break;
+ case BuiltinType::Double:
+ c = 'd'; break;
+ case BuiltinType::LongDouble:
+ c = 'D'; break;
+ case BuiltinType::NullPtr:
+ c = 'n'; break;
+#define BUILTIN_TYPE(Id, SingletonId)
+#define PLACEHOLDER_TYPE(Id, SingletonId) case BuiltinType::Id:
+#include "clang/AST/BuiltinTypes.def"
+ case BuiltinType::Dependent:
+ case BuiltinType::OCLImage1d:
+ case BuiltinType::OCLImage1dArray:
+ case BuiltinType::OCLImage1dBuffer:
+ case BuiltinType::OCLImage2d:
+ case BuiltinType::OCLImage2dArray:
+ case BuiltinType::OCLImage3d:
+ case BuiltinType::OCLEvent:
+ case BuiltinType::OCLSampler:
+ IgnoreResults = true;
+ return;
+ case BuiltinType::ObjCId:
+ c = 'o'; break;
+ case BuiltinType::ObjCClass:
+ c = 'O'; break;
+ case BuiltinType::ObjCSel:
+ c = 'e'; break;
+ }
+ Out << c;
+ return;
+ }
+
+ // If we have already seen this (non-built-in) type, use a substitution
+ // encoding.
+ llvm::DenseMap<const Type *, unsigned>::iterator Substitution
+ = TypeSubstitutions.find(T.getTypePtr());
+ if (Substitution != TypeSubstitutions.end()) {
+ Out << 'S' << Substitution->second << '_';
+ return;
+ } else {
+ // Record this as a substitution.
+ unsigned Number = TypeSubstitutions.size();
+ TypeSubstitutions[T.getTypePtr()] = Number;
+ }
+
+ if (const PointerType *PT = T->getAs<PointerType>()) {
+ Out << '*';
+ T = PT->getPointeeType();
+ continue;
+ }
+ if (const ReferenceType *RT = T->getAs<ReferenceType>()) {
+ Out << '&';
+ T = RT->getPointeeType();
+ continue;
+ }
+ if (const FunctionProtoType *FT = T->getAs<FunctionProtoType>()) {
+ Out << 'F';
+ VisitType(FT->getResultType());
+ for (FunctionProtoType::arg_type_iterator
+ I = FT->arg_type_begin(), E = FT->arg_type_end(); I!=E; ++I) {
+ VisitType(*I);
+ }
+ if (FT->isVariadic())
+ Out << '.';
+ return;
+ }
+ if (const BlockPointerType *BT = T->getAs<BlockPointerType>()) {
+ Out << 'B';
+ T = BT->getPointeeType();
+ continue;
+ }
+ if (const ComplexType *CT = T->getAs<ComplexType>()) {
+ Out << '<';
+ T = CT->getElementType();
+ continue;
+ }
+ if (const TagType *TT = T->getAs<TagType>()) {
+ Out << '$';
+ VisitTagDecl(TT->getDecl());
+ return;
+ }
+ if (const TemplateTypeParmType *TTP = T->getAs<TemplateTypeParmType>()) {
+ Out << 't' << TTP->getDepth() << '.' << TTP->getIndex();
+ return;
+ }
+ if (const TemplateSpecializationType *Spec
+ = T->getAs<TemplateSpecializationType>()) {
+ Out << '>';
+ VisitTemplateName(Spec->getTemplateName());
+ Out << Spec->getNumArgs();
+ for (unsigned I = 0, N = Spec->getNumArgs(); I != N; ++I)
+ VisitTemplateArgument(Spec->getArg(I));
+ return;
+ }
+
+ // Unhandled type.
+ Out << ' ';
+ break;
+ } while (true);
+}
+
+void USRGenerator::VisitTemplateParameterList(
+ const TemplateParameterList *Params) {
+ if (!Params)
+ return;
+ Out << '>' << Params->size();
+ for (TemplateParameterList::const_iterator P = Params->begin(),
+ PEnd = Params->end();
+ P != PEnd; ++P) {
+ Out << '#';
+ if (isa<TemplateTypeParmDecl>(*P)) {
+ if (cast<TemplateTypeParmDecl>(*P)->isParameterPack())
+ Out<< 'p';
+ Out << 'T';
+ continue;
+ }
+
+ if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(*P)) {
+ if (NTTP->isParameterPack())
+ Out << 'p';
+ Out << 'N';
+ VisitType(NTTP->getType());
+ continue;
+ }
+
+ TemplateTemplateParmDecl *TTP = cast<TemplateTemplateParmDecl>(*P);
+ if (TTP->isParameterPack())
+ Out << 'p';
+ Out << 't';
+ VisitTemplateParameterList(TTP->getTemplateParameters());
+ }
+}
+
+void USRGenerator::VisitTemplateName(TemplateName Name) {
+ if (TemplateDecl *Template = Name.getAsTemplateDecl()) {
+ if (TemplateTemplateParmDecl *TTP
+ = dyn_cast<TemplateTemplateParmDecl>(Template)) {
+ Out << 't' << TTP->getDepth() << '.' << TTP->getIndex();
+ return;
+ }
+
+ Visit(Template);
+ return;
+ }
+
+ // FIXME: Visit dependent template names.
+}
+
+void USRGenerator::VisitTemplateArgument(const TemplateArgument &Arg) {
+ switch (Arg.getKind()) {
+ case TemplateArgument::Null:
+ break;
+
+ case TemplateArgument::Declaration:
+ Visit(Arg.getAsDecl());
+ break;
+
+ case TemplateArgument::NullPtr:
+ break;
+
+ case TemplateArgument::TemplateExpansion:
+ Out << 'P'; // pack expansion of...
+ // Fall through
+ case TemplateArgument::Template:
+ VisitTemplateName(Arg.getAsTemplateOrTemplatePattern());
+ break;
+
+ case TemplateArgument::Expression:
+ // FIXME: Visit expressions.
+ break;
+
+ case TemplateArgument::Pack:
+ Out << 'p' << Arg.pack_size();
+ for (TemplateArgument::pack_iterator P = Arg.pack_begin(), PEnd = Arg.pack_end();
+ P != PEnd; ++P)
+ VisitTemplateArgument(*P);
+ break;
+
+ case TemplateArgument::Type:
+ VisitType(Arg.getAsType());
+ break;
+
+ case TemplateArgument::Integral:
+ Out << 'V';
+ VisitType(Arg.getIntegralType());
+ Out << Arg.getAsIntegral();
+ break;
+ }
+}
+
+//===----------------------------------------------------------------------===//
+// USR generation functions.
+//===----------------------------------------------------------------------===//
+
+void clang::index::generateUSRForObjCClass(StringRef Cls, raw_ostream &OS) {
+ OS << "objc(cs)" << Cls;
+}
+
+void clang::index::generateUSRForObjCCategory(StringRef Cls, StringRef Cat,
+ raw_ostream &OS) {
+ OS << "objc(cy)" << Cls << '@' << Cat;
+}
+
+void clang::index::generateUSRForObjCIvar(StringRef Ivar, raw_ostream &OS) {
+ OS << '@' << Ivar;
+}
+
+void clang::index::generateUSRForObjCMethod(StringRef Sel,
+ bool IsInstanceMethod,
+ raw_ostream &OS) {
+ OS << (IsInstanceMethod ? "(im)" : "(cm)") << Sel;
+}
+
+void clang::index::generateUSRForObjCProperty(StringRef Prop, raw_ostream &OS) {
+ OS << "(py)" << Prop;
+}
+
+void clang::index::generateUSRForObjCProtocol(StringRef Prot, raw_ostream &OS) {
+ OS << "objc(pl)" << Prot;
+}
+
+bool clang::index::generateUSRForDecl(const Decl *D,
+ SmallVectorImpl<char> &Buf) {
+ // Don't generate USRs for things with invalid locations.
+ if (!D || D->getLocStart().isInvalid())
+ return true;
+
+ USRGenerator UG(&D->getASTContext(), Buf);
+ UG.Visit(D);
+ return UG.ignoreResults();
+}
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