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//===- USRGeneration.cpp - Routines for USR generation --------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "clang/Index/USRGeneration.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/DeclTemplate.h"
#include "clang/AST/DeclVisitor.h"
#include "clang/Lex/PreprocessingRecord.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/raw_ostream.h"
using namespace clang;
using namespace clang::index;
//===----------------------------------------------------------------------===//
// USR generation.
//===----------------------------------------------------------------------===//
/// \returns true on error.
static bool printLoc(llvm::raw_ostream &OS, SourceLocation Loc,
const SourceManager &SM, bool IncludeOffset) {
if (Loc.isInvalid()) {
return true;
}
Loc = SM.getExpansionLoc(Loc);
const std::pair<FileID, unsigned> &Decomposed = SM.getDecomposedLoc(Loc);
const FileEntry *FE = SM.getFileEntryForID(Decomposed.first);
if (FE) {
OS << llvm::sys::path::filename(FE->getName());
} else {
// This case really isn't interesting.
return true;
}
if (IncludeOffset) {
// 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.
OS << '@' << Decomposed.second;
}
return false;
}
static StringRef GetExternalSourceContainer(const NamedDecl *D) {
if (!D)
return StringRef();
if (auto *attr = D->getExternalSourceSymbolAttr()) {
return attr->getDefinedIn();
}
return StringRef();
}
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,
const ObjCCategoryDecl *CatD = nullptr);
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 VisitBindingDecl(const BindingDecl *D);
void VisitNonTypeTemplateParmDecl(const NonTypeTemplateParmDecl *D);
void VisitTemplateTemplateParmDecl(const TemplateTemplateParmDecl *D);
void VisitUnresolvedUsingValueDecl(const UnresolvedUsingValueDecl *D);
void VisitUnresolvedUsingTypenameDecl(const UnresolvedUsingTypenameDecl *D);
void VisitLinkageSpecDecl(const LinkageSpecDecl *D) {
IgnoreResults = true; // No USRs for linkage specs themselves.
}
void VisitUsingDirectiveDecl(const UsingDirectiveDecl *D) {
IgnoreResults = true;
}
void VisitUsingDecl(const UsingDecl *D) {
VisitDeclContext(D->getDeclContext());
Out << "@UD@";
bool EmittedDeclName = !EmitDeclName(D);
assert(EmittedDeclName && "EmitDeclName can not fail for UsingDecls");
(void)EmittedDeclName;
}
bool ShouldGenerateLocation(const NamedDecl *D);
bool isLocal(const NamedDecl *D) {
return D->getParentFunctionOrMethod() != nullptr;
}
void GenExtSymbolContainer(const NamedDecl *D);
/// Generate the string component containing the location of the
/// declaration.
bool GenLoc(const Decl *D, bool IncludeOffset);
/// 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, StringRef ExtSymDefinedIn,
StringRef CategoryContextExtSymbolDefinedIn) {
generateUSRForObjCClass(cls, Out, ExtSymDefinedIn,
CategoryContextExtSymbolDefinedIn);
}
/// Generate a USR for an Objective-C class category.
void GenObjCCategory(StringRef cls, StringRef cat,
StringRef clsExt, StringRef catExt) {
generateUSRForObjCCategory(cls, cat, Out, clsExt, catExt);
}
/// Generate a USR fragment for an Objective-C property.
void GenObjCProperty(StringRef prop, bool isClassProp) {
generateUSRForObjCProperty(prop, isClassProp, Out);
}
/// Generate a USR for an Objective-C protocol.
void GenObjCProtocol(StringRef prot, StringRef ext) {
generateUSRForObjCProtocol(prot, Out, ext);
}
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) {
const unsigned startSize = Buf.size();
D->printName(Out);
const unsigned endSize = Buf.size();
return startSize == endSize;
}
bool USRGenerator::ShouldGenerateLocation(const NamedDecl *D) {
if (D->isExternallyVisible())
return false;
if (D->getParentFunctionOrMethod())
return true;
SourceLocation Loc = D->getLocation();
if (Loc.isInvalid())
return false;
const SourceManager &SM = Context->getSourceManager();
return !SM.isInSystemHeader(Loc);
}
void USRGenerator::VisitDeclContext(const DeclContext *DC) {
if (const NamedDecl *D = dyn_cast<NamedDecl>(DC))
Visit(D);
else if (isa<LinkageSpecDecl>(DC)) // Linkage specs are transparent in USRs.
VisitDeclContext(DC->getParent());
}
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, /*IncludeOffset=*/isLocal(D)))
return;
const unsigned StartSize = Buf.size();
VisitDeclContext(D->getDeclContext());
if (Buf.size() == StartSize)
GenExtSymbolContainer(D);
bool IsTemplate = false;
if (FunctionTemplateDecl *FunTmpl = D->getDescribedFunctionTemplate()) {
IsTemplate = true;
Out << "@FT@";
VisitTemplateParameterList(FunTmpl->getTemplateParameters());
} else
Out << "@F@";
PrintingPolicy Policy(Context->getLangOpts());
// Forward references can have different template argument names. Suppress the
// template argument names in constructors to make their USR more stable.
Policy.SuppressTemplateArgsInCXXConstructors = true;
D->getDeclName().print(Out, Policy);
ASTContext &Ctx = *Context;
if ((!Ctx.getLangOpts().CPlusPlus || D->isExternC()) &&
!D->hasAttr<OverloadableAttr>())
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 (auto PD : D->parameters()) {
Out << '#';
VisitType(PD->getType());
}
if (D->isVariadic())
Out << '.';
if (IsTemplate) {
// Function templates can be overloaded by return type, for example:
// \code
// template <class T> typename T::A foo() {}
// template <class T> typename T::B foo() {}
// \endcode
Out << '#';
VisitType(D->getReturnType());
}
Out << '#';
if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(D)) {
if (MD->isStatic())
Out << 'S';
// FIXME: OpenCL: Need to consider address spaces
if (unsigned quals = MD->getMethodQualifiers().getCVRUQualifiers())
Out << (char)('0' + quals);
switch (MD->getRefQualifier()) {
case RQ_None: break;
case RQ_LValue: Out << '&'; break;
case RQ_RValue: Out << "&&"; break;
}
}
}
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, /*IncludeOffset=*/isLocal(D)))
return;
VisitDeclContext(D->getDeclContext());
if (VarTemplateDecl *VarTmpl = D->getDescribedVarTemplate()) {
Out << "@VT";
VisitTemplateParameterList(VarTmpl->getTemplateParameters());
} else if (const VarTemplatePartialSpecializationDecl *PartialSpec
= dyn_cast<VarTemplatePartialSpecializationDecl>(D)) {
Out << "@VP";
VisitTemplateParameterList(PartialSpec->getTemplateParameters());
}
// 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;
// For a template specialization, mangle the template arguments.
if (const VarTemplateSpecializationDecl *Spec
= dyn_cast<VarTemplateSpecializationDecl>(D)) {
const TemplateArgumentList &Args = Spec->getTemplateArgs();
Out << '>';
for (unsigned I = 0, N = Args.size(); I != N; ++I) {
Out << '#';
VisitTemplateArgument(Args.get(I));
}
}
}
void USRGenerator::VisitBindingDecl(const BindingDecl *D) {
if (isLocal(D) && GenLoc(D, /*IncludeOffset=*/true))
return;
VisitNamedDecl(D);
}
void USRGenerator::VisitNonTypeTemplateParmDecl(
const NonTypeTemplateParmDecl *D) {
GenLoc(D, /*IncludeOffset=*/true);
}
void USRGenerator::VisitTemplateTemplateParmDecl(
const TemplateTemplateParmDecl *D) {
GenLoc(D, /*IncludeOffset=*/true);
}
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;
}
auto getCategoryContext = [](const ObjCMethodDecl *D) ->
const ObjCCategoryDecl * {
if (auto *CD = dyn_cast<ObjCCategoryDecl>(D->getDeclContext()))
return CD;
if (auto *ICD = dyn_cast<ObjCCategoryImplDecl>(D->getDeclContext()))
return ICD->getCategoryDecl();
return nullptr;
};
auto *CD = getCategoryContext(D);
VisitObjCContainerDecl(ID, CD);
}
// 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,
const ObjCCategoryDecl *CatD) {
switch (D->getKind()) {
default:
llvm_unreachable("Invalid ObjC container.");
case Decl::ObjCInterface:
case Decl::ObjCImplementation:
GenObjCClass(D->getName(), GetExternalSourceContainer(D),
GetExternalSourceContainer(CatD));
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, /*IncludeOffset=*/true);
}
else
GenObjCCategory(ID->getName(), CD->getName(),
GetExternalSourceContainer(ID),
GetExternalSourceContainer(CD));
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(),
GetExternalSourceContainer(ID),
GetExternalSourceContainer(CD));
break;
}
case Decl::ObjCProtocol: {
const ObjCProtocolDecl *PD = cast<ObjCProtocolDecl>(D);
GenObjCProtocol(PD->getName(), GetExternalSourceContainer(PD));
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(), D->isClassProperty());
}
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 (!isa<EnumDecl>(D) &&
ShouldGenerateLocation(D) && GenLoc(D, /*IncludeOffset=*/isLocal(D)))
return;
GenExtSymbolContainer(D);
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_Class:
case TTK_Struct: Out << "@ST"; 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_Class:
case TTK_Struct: Out << "@SP"; 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_Class:
case TTK_Struct: Out << "@S"; break;
case TTK_Union: Out << "@U"; break;
case TTK_Enum: Out << "@E"; break;
}
}
Out << '@';
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 {
if (D->isEmbeddedInDeclarator() && !D->isFreeStanding()) {
printLoc(Out, D->getLocation(), Context->getSourceManager(), true);
} else {
Buf[off] = 'a';
if (auto *ED = dyn_cast<EnumDecl>(D)) {
// Distinguish USRs of anonymous enums by using their first enumerator.
auto enum_range = ED->enumerators();
if (enum_range.begin() != enum_range.end()) {
Out << '@' << **enum_range.begin();
}
}
}
}
}
// For a class template specialization, mangle the template arguments.
if (const ClassTemplateSpecializationDecl *Spec
= dyn_cast<ClassTemplateSpecializationDecl>(D)) {
const TemplateArgumentList &Args = Spec->getTemplateArgs();
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, /*IncludeOffset=*/isLocal(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, /*IncludeOffset=*/true);
}
void USRGenerator::GenExtSymbolContainer(const NamedDecl *D) {
StringRef Container = GetExternalSourceContainer(D);
if (!Container.empty())
Out << "@M@" << Container;
}
bool USRGenerator::GenLoc(const Decl *D, bool IncludeOffset) {
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();
IgnoreResults =
IgnoreResults || printLoc(Out, D->getBeginLoc(),
Context->getSourceManager(), IncludeOffset);
return IgnoreResults;
}
static void printQualifier(llvm::raw_ostream &Out, ASTContext &Ctx, NestedNameSpecifier *NNS) {
// FIXME: Encode the qualifier, don't just print it.
PrintingPolicy PO(Ctx.getLangOpts());
PO.SuppressTagKeyword = true;
PO.SuppressUnwrittenScope = true;
PO.ConstantArraySizeAsWritten = false;
PO.AnonymousTagLocations = false;
NNS->print(Out, PO);
}
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::UChar:
c = 'c'; break;
case BuiltinType::Char8:
c = 'u'; break; // FIXME: Check this doesn't collide
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_U:
case BuiltinType::Char_S:
c = 'C'; break;
case BuiltinType::SChar:
c = 'r'; 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::Float16:
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::Float128:
c = 'Q'; 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:
#define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
case BuiltinType::Id:
#include "clang/Basic/OpenCLImageTypes.def"
#define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \
case BuiltinType::Id:
#include "clang/Basic/OpenCLExtensionTypes.def"
case BuiltinType::OCLEvent:
case BuiltinType::OCLClkEvent:
case BuiltinType::OCLQueue:
case BuiltinType::OCLReserveID:
case BuiltinType::OCLSampler:
#define SVE_TYPE(Name, Id, SingletonId) \
case BuiltinType::Id:
#include "clang/Basic/AArch64SVEACLETypes.def"
case BuiltinType::ShortAccum:
case BuiltinType::Accum:
case BuiltinType::LongAccum:
case BuiltinType::UShortAccum:
case BuiltinType::UAccum:
case BuiltinType::ULongAccum:
case BuiltinType::ShortFract:
case BuiltinType::Fract:
case BuiltinType::LongFract:
case BuiltinType::UShortFract:
case BuiltinType::UFract:
case BuiltinType::ULongFract:
case BuiltinType::SatShortAccum:
case BuiltinType::SatAccum:
case BuiltinType::SatLongAccum:
case BuiltinType::SatUShortAccum:
case BuiltinType::SatUAccum:
case BuiltinType::SatULongAccum:
case BuiltinType::SatShortFract:
case BuiltinType::SatFract:
case BuiltinType::SatLongFract:
case BuiltinType::SatUShortFract:
case BuiltinType::SatUFract:
case BuiltinType::SatULongFract:
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 ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) {
Out << '*';
T = OPT->getPointeeType();
continue;
}
if (const RValueReferenceType *RT = T->getAs<RValueReferenceType>()) {
Out << "&&";
T = RT->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->getReturnType());
Out << '(';
for (const auto &I : FT->param_types()) {
Out << '#';
VisitType(I);
}
Out << ')';
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 << '$';
VisitTagDecl(TT->getDecl());
return;
}
if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) {
Out << '$';
VisitObjCInterfaceDecl(OIT->getDecl());
return;
}
if (const ObjCObjectType *OIT = T->getAs<ObjCObjectType>()) {
Out << 'Q';
VisitType(OIT->getBaseType());
for (auto *Prot : OIT->getProtocols())
VisitObjCProtocolDecl(Prot);
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;
}
if (const DependentNameType *DNT = T->getAs<DependentNameType>()) {
Out << '^';
printQualifier(Out, Ctx, DNT->getQualifier());
Out << ':' << DNT->getIdentifier()->getName();
return;
}
if (const InjectedClassNameType *InjT = T->getAs<InjectedClassNameType>()) {
T = InjT->getInjectedSpecializationType();
continue;
}
if (const auto *VT = T->getAs<VectorType>()) {
Out << (T->isExtVectorType() ? ']' : '[');
Out << VT->getNumElements();
T = VT->getElementType();
continue;
}
if (const auto *const AT = dyn_cast<ArrayType>(T)) {
Out << '{';
switch (AT->getSizeModifier()) {
case ArrayType::Static:
Out << 's';
break;
case ArrayType::Star:
Out << '*';
break;
case ArrayType::Normal:
Out << 'n';
break;
}
if (const auto *const CAT = dyn_cast<ConstantArrayType>(T))
Out << CAT->getSize();
T = AT->getElementType();
continue;
}
// 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...
LLVM_FALLTHROUGH;
case TemplateArgument::Template:
VisitTemplateName(Arg.getAsTemplateOrTemplatePattern());
break;
case TemplateArgument::Expression:
// FIXME: Visit expressions.
break;
case TemplateArgument::Pack:
Out << 'p' << Arg.pack_size();
for (const auto &P : Arg.pack_elements())
VisitTemplateArgument(P);
break;
case TemplateArgument::Type:
VisitType(Arg.getAsType());
break;
case TemplateArgument::Integral:
Out << 'V';
VisitType(Arg.getIntegralType());
Out << Arg.getAsIntegral();
break;
}
}
void USRGenerator::VisitUnresolvedUsingValueDecl(const UnresolvedUsingValueDecl *D) {
if (ShouldGenerateLocation(D) && GenLoc(D, /*IncludeOffset=*/isLocal(D)))
return;
VisitDeclContext(D->getDeclContext());
Out << "@UUV@";
printQualifier(Out, D->getASTContext(), D->getQualifier());
EmitDeclName(D);
}
void USRGenerator::VisitUnresolvedUsingTypenameDecl(const UnresolvedUsingTypenameDecl *D) {
if (ShouldGenerateLocation(D) && GenLoc(D, /*IncludeOffset=*/isLocal(D)))
return;
VisitDeclContext(D->getDeclContext());
Out << "@UUT@";
printQualifier(Out, D->getASTContext(), D->getQualifier());
Out << D->getName(); // Simple name.
}
//===----------------------------------------------------------------------===//
// USR generation functions.
//===----------------------------------------------------------------------===//
static void combineClassAndCategoryExtContainers(StringRef ClsSymDefinedIn,
StringRef CatSymDefinedIn,
raw_ostream &OS) {
if (ClsSymDefinedIn.empty() && CatSymDefinedIn.empty())
return;
if (CatSymDefinedIn.empty()) {
OS << "@M@" << ClsSymDefinedIn << '@';
return;
}
OS << "@CM@" << CatSymDefinedIn << '@';
if (ClsSymDefinedIn != CatSymDefinedIn) {
OS << ClsSymDefinedIn << '@';
}
}
void clang::index::generateUSRForObjCClass(StringRef Cls, raw_ostream &OS,
StringRef ExtSymDefinedIn,
StringRef CategoryContextExtSymbolDefinedIn) {
combineClassAndCategoryExtContainers(ExtSymDefinedIn,
CategoryContextExtSymbolDefinedIn, OS);
OS << "objc(cs)" << Cls;
}
void clang::index::generateUSRForObjCCategory(StringRef Cls, StringRef Cat,
raw_ostream &OS,
StringRef ClsSymDefinedIn,
StringRef CatSymDefinedIn) {
combineClassAndCategoryExtContainers(ClsSymDefinedIn, CatSymDefinedIn, 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, bool isClassProp,
raw_ostream &OS) {
OS << (isClassProp ? "(cpy)" : "(py)") << Prop;
}
void clang::index::generateUSRForObjCProtocol(StringRef Prot, raw_ostream &OS,
StringRef ExtSymDefinedIn) {
if (!ExtSymDefinedIn.empty())
OS << "@M@" << ExtSymDefinedIn << '@';
OS << "objc(pl)" << Prot;
}
void clang::index::generateUSRForGlobalEnum(StringRef EnumName, raw_ostream &OS,
StringRef ExtSymDefinedIn) {
if (!ExtSymDefinedIn.empty())
OS << "@M@" << ExtSymDefinedIn;
OS << "@E@" << EnumName;
}
void clang::index::generateUSRForEnumConstant(StringRef EnumConstantName,
raw_ostream &OS) {
OS << '@' << EnumConstantName;
}
bool clang::index::generateUSRForDecl(const Decl *D,
SmallVectorImpl<char> &Buf) {
if (!D)
return true;
// We don't ignore decls with invalid source locations. Implicit decls, like
// C++'s operator new function, can have invalid locations but it is fine to
// create USRs that can identify them.
USRGenerator UG(&D->getASTContext(), Buf);
UG.Visit(D);
return UG.ignoreResults();
}
bool clang::index::generateUSRForMacro(const MacroDefinitionRecord *MD,
const SourceManager &SM,
SmallVectorImpl<char> &Buf) {
if (!MD)
return true;
return generateUSRForMacro(MD->getName()->getName(), MD->getLocation(),
SM, Buf);
}
bool clang::index::generateUSRForMacro(StringRef MacroName, SourceLocation Loc,
const SourceManager &SM,
SmallVectorImpl<char> &Buf) {
// Don't generate USRs for things with invalid locations.
if (MacroName.empty() || Loc.isInvalid())
return true;
llvm::raw_svector_ostream Out(Buf);
// Assume that system headers are sane. Don't put source location
// information into the USR if the macro comes from a system header.
bool ShouldGenerateLocation = !SM.isInSystemHeader(Loc);
Out << getUSRSpacePrefix();
if (ShouldGenerateLocation)
printLoc(Out, Loc, SM, /*IncludeOffset=*/true);
Out << "@macro@";
Out << MacroName;
return false;
}
bool clang::index::generateUSRForType(QualType T, ASTContext &Ctx,
SmallVectorImpl<char> &Buf) {
if (T.isNull())
return true;
T = T.getCanonicalType();
USRGenerator UG(&Ctx, Buf);
UG.VisitType(T);
return UG.ignoreResults();
}
bool clang::index::generateFullUSRForModule(const Module *Mod,
raw_ostream &OS) {
if (!Mod->Parent)
return generateFullUSRForTopLevelModuleName(Mod->Name, OS);
if (generateFullUSRForModule(Mod->Parent, OS))
return true;
return generateUSRFragmentForModule(Mod, OS);
}
bool clang::index::generateFullUSRForTopLevelModuleName(StringRef ModName,
raw_ostream &OS) {
OS << getUSRSpacePrefix();
return generateUSRFragmentForModuleName(ModName, OS);
}
bool clang::index::generateUSRFragmentForModule(const Module *Mod,
raw_ostream &OS) {
return generateUSRFragmentForModuleName(Mod->Name, OS);
}
bool clang::index::generateUSRFragmentForModuleName(StringRef ModName,
raw_ostream &OS) {
OS << "@M@" << ModName;
return false;
}
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