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llvm-project/clang/lib/Index/IndexSymbol.cpp

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//===--- IndexSymbol.cpp - Types and functions for indexing symbols -------===//
//
// 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/IndexSymbol.h"
#include "clang/AST/Attr.h"
#include "clang/AST/DeclCXX.h"
#include "clang/AST/DeclObjC.h"
#include "clang/AST/DeclTemplate.h"
#include "clang/AST/PrettyPrinter.h"
#include "clang/Lex/MacroInfo.h"
using namespace clang;
using namespace clang::index;
/// \returns true if \c D is a subclass of 'XCTestCase'.
static bool isUnitTestCase(const ObjCInterfaceDecl *D) {
if (!D)
return false;
while (const ObjCInterfaceDecl *SuperD = D->getSuperClass()) {
if (SuperD->getName() == "XCTestCase")
return true;
D = SuperD;
}
return false;
}
/// \returns true if \c D is in a subclass of 'XCTestCase', returns void, has
/// no parameters, and its name starts with 'test'.
static bool isUnitTest(const ObjCMethodDecl *D) {
if (!D->parameters().empty())
return false;
if (!D->getReturnType()->isVoidType())
return false;
if (!D->getSelector().getNameForSlot(0).startswith("test"))
return false;
return isUnitTestCase(D->getClassInterface());
}
static void checkForIBOutlets(const Decl *D, SymbolPropertySet &PropSet) {
if (D->hasAttr<IBOutletAttr>()) {
PropSet |= (SymbolPropertySet)SymbolProperty::IBAnnotated;
} else if (D->hasAttr<IBOutletCollectionAttr>()) {
PropSet |= (SymbolPropertySet)SymbolProperty::IBAnnotated;
PropSet |= (SymbolPropertySet)SymbolProperty::IBOutletCollection;
}
}
bool index::isFunctionLocalSymbol(const Decl *D) {
assert(D);
if (isa<ParmVarDecl>(D))
return true;
if (isa<ObjCTypeParamDecl>(D))
return true;
if (isa<UsingDirectiveDecl>(D))
return false;
if (!D->getParentFunctionOrMethod())
return false;
if (const NamedDecl *ND = dyn_cast<NamedDecl>(D)) {
switch (ND->getFormalLinkage()) {
case NoLinkage:
case InternalLinkage:
return true;
case VisibleNoLinkage:
case UniqueExternalLinkage:
case ModuleInternalLinkage:
llvm_unreachable("Not a sema linkage");
case ModuleLinkage:
case ExternalLinkage:
return false;
}
}
return true;
}
SymbolInfo index::getSymbolInfo(const Decl *D) {
assert(D);
SymbolInfo Info;
Info.Kind = SymbolKind::Unknown;
Info.SubKind = SymbolSubKind::None;
Info.Properties = SymbolPropertySet();
Info.Lang = SymbolLanguage::C;
if (isFunctionLocalSymbol(D)) {
Info.Properties |= (SymbolPropertySet)SymbolProperty::Local;
}
if (isa<ObjCProtocolDecl>(D->getDeclContext())) {
Info.Properties |= (SymbolPropertySet)SymbolProperty::ProtocolInterface;
}
if (auto *VT = dyn_cast<VarTemplateDecl>(D)) {
Info.Properties |= (SymbolPropertySet)SymbolProperty::Generic;
Info.Lang = SymbolLanguage::CXX;
// All other fields are filled from the templated decl.
D = VT->getTemplatedDecl();
}
if (const TagDecl *TD = dyn_cast<TagDecl>(D)) {
switch (TD->getTagKind()) {
case TTK_Struct:
Info.Kind = SymbolKind::Struct; break;
case TTK_Union:
Info.Kind = SymbolKind::Union; break;
case TTK_Class:
Info.Kind = SymbolKind::Class;
Info.Lang = SymbolLanguage::CXX;
break;
case TTK_Interface:
Info.Kind = SymbolKind::Protocol;
Info.Lang = SymbolLanguage::CXX;
break;
case TTK_Enum:
Info.Kind = SymbolKind::Enum; break;
}
if (const CXXRecordDecl *CXXRec = dyn_cast<CXXRecordDecl>(D)) {
if (!CXXRec->isCLike()) {
Info.Lang = SymbolLanguage::CXX;
if (CXXRec->getDescribedClassTemplate()) {
Info.Properties |= (SymbolPropertySet)SymbolProperty::Generic;
}
}
}
if (isa<ClassTemplatePartialSpecializationDecl>(D)) {
Info.Properties |= (SymbolPropertySet)SymbolProperty::Generic;
Info.Properties |=
(SymbolPropertySet)SymbolProperty::TemplatePartialSpecialization;
} else if (isa<ClassTemplateSpecializationDecl>(D)) {
Info.Properties |= (SymbolPropertySet)SymbolProperty::Generic;
Info.Properties |=
(SymbolPropertySet)SymbolProperty::TemplateSpecialization;
}
} else if (auto *VD = dyn_cast<VarDecl>(D)) {
Info.Kind = SymbolKind::Variable;
if (isa<ParmVarDecl>(D)) {
Info.Kind = SymbolKind::Parameter;
} else if (isa<CXXRecordDecl>(D->getDeclContext())) {
Info.Kind = SymbolKind::StaticProperty;
Info.Lang = SymbolLanguage::CXX;
}
if (isa<VarTemplatePartialSpecializationDecl>(D)) {
Info.Lang = SymbolLanguage::CXX;
Info.Properties |= (SymbolPropertySet)SymbolProperty::Generic;
Info.Properties |=
(SymbolPropertySet)SymbolProperty::TemplatePartialSpecialization;
} else if (isa<VarTemplateSpecializationDecl>(D)) {
Info.Lang = SymbolLanguage::CXX;
Info.Properties |= (SymbolPropertySet)SymbolProperty::Generic;
Info.Properties |=
(SymbolPropertySet)SymbolProperty::TemplateSpecialization;
} else if (VD->getDescribedVarTemplate()) {
Info.Lang = SymbolLanguage::CXX;
Info.Properties |= (SymbolPropertySet)SymbolProperty::Generic;
}
} else {
switch (D->getKind()) {
case Decl::Import:
Info.Kind = SymbolKind::Module;
break;
case Decl::Typedef:
Info.Kind = SymbolKind::TypeAlias; break; // Lang = C
case Decl::Function:
Info.Kind = SymbolKind::Function;
break;
case Decl::Field:
case Decl::IndirectField:
Info.Kind = SymbolKind::Field;
if (const CXXRecordDecl *
CXXRec = dyn_cast<CXXRecordDecl>(D->getDeclContext())) {
if (!CXXRec->isCLike())
Info.Lang = SymbolLanguage::CXX;
}
break;
case Decl::EnumConstant:
Info.Kind = SymbolKind::EnumConstant; break;
case Decl::ObjCInterface:
case Decl::ObjCImplementation: {
Info.Kind = SymbolKind::Class;
Info.Lang = SymbolLanguage::ObjC;
const ObjCInterfaceDecl *ClsD = dyn_cast<ObjCInterfaceDecl>(D);
if (!ClsD)
ClsD = cast<ObjCImplementationDecl>(D)->getClassInterface();
if (isUnitTestCase(ClsD))
Info.Properties |= (SymbolPropertySet)SymbolProperty::UnitTest;
break;
}
case Decl::ObjCProtocol:
Info.Kind = SymbolKind::Protocol;
Info.Lang = SymbolLanguage::ObjC;
break;
case Decl::ObjCCategory:
case Decl::ObjCCategoryImpl: {
Info.Kind = SymbolKind::Extension;
Info.Lang = SymbolLanguage::ObjC;
const ObjCInterfaceDecl *ClsD = nullptr;
if (auto *CatD = dyn_cast<ObjCCategoryDecl>(D))
ClsD = CatD->getClassInterface();
else
ClsD = cast<ObjCCategoryImplDecl>(D)->getClassInterface();
if (isUnitTestCase(ClsD))
Info.Properties |= (SymbolPropertySet)SymbolProperty::UnitTest;
break;
}
case Decl::ObjCMethod: {
const ObjCMethodDecl *MD = cast<ObjCMethodDecl>(D);
Info.Kind = MD->isInstanceMethod() ? SymbolKind::InstanceMethod : SymbolKind::ClassMethod;
if (MD->isPropertyAccessor()) {
if (MD->param_size())
Info.SubKind = SymbolSubKind::AccessorSetter;
else
Info.SubKind = SymbolSubKind::AccessorGetter;
}
Info.Lang = SymbolLanguage::ObjC;
if (isUnitTest(MD))
Info.Properties |= (SymbolPropertySet)SymbolProperty::UnitTest;
if (D->hasAttr<IBActionAttr>())
Info.Properties |= (SymbolPropertySet)SymbolProperty::IBAnnotated;
break;
}
case Decl::ObjCProperty:
Info.Kind = SymbolKind::InstanceProperty;
Info.Lang = SymbolLanguage::ObjC;
checkForIBOutlets(D, Info.Properties);
if (auto *Annot = D->getAttr<AnnotateAttr>()) {
if (Annot->getAnnotation() == "gk_inspectable")
Info.Properties |= (SymbolPropertySet)SymbolProperty::GKInspectable;
}
break;
case Decl::ObjCIvar:
Info.Kind = SymbolKind::Field;
Info.Lang = SymbolLanguage::ObjC;
checkForIBOutlets(D, Info.Properties);
break;
case Decl::Namespace:
Info.Kind = SymbolKind::Namespace;
Info.Lang = SymbolLanguage::CXX;
break;
case Decl::NamespaceAlias:
Info.Kind = SymbolKind::NamespaceAlias;
Info.Lang = SymbolLanguage::CXX;
break;
case Decl::CXXConstructor: {
Info.Kind = SymbolKind::Constructor;
Info.Lang = SymbolLanguage::CXX;
auto *CD = cast<CXXConstructorDecl>(D);
if (CD->isCopyConstructor())
Info.SubKind = SymbolSubKind::CXXCopyConstructor;
else if (CD->isMoveConstructor())
Info.SubKind = SymbolSubKind::CXXMoveConstructor;
break;
}
case Decl::CXXDestructor:
Info.Kind = SymbolKind::Destructor;
Info.Lang = SymbolLanguage::CXX;
break;
case Decl::CXXConversion:
Info.Kind = SymbolKind::ConversionFunction;
Info.Lang = SymbolLanguage::CXX;
break;
case Decl::CXXMethod: {
const CXXMethodDecl *MD = cast<CXXMethodDecl>(D);
if (MD->isStatic())
Info.Kind = SymbolKind::StaticMethod;
else
Info.Kind = SymbolKind::InstanceMethod;
Info.Lang = SymbolLanguage::CXX;
break;
}
case Decl::ClassTemplate:
Info.Kind = SymbolKind::Class;
Info.Properties |= (SymbolPropertySet)SymbolProperty::Generic;
Info.Lang = SymbolLanguage::CXX;
break;
case Decl::FunctionTemplate:
Info.Kind = SymbolKind::Function;
Info.Properties |= (SymbolPropertySet)SymbolProperty::Generic;
Info.Lang = SymbolLanguage::CXX;
if (const CXXMethodDecl *MD = dyn_cast_or_null<CXXMethodDecl>(
cast<FunctionTemplateDecl>(D)->getTemplatedDecl())) {
if (isa<CXXConstructorDecl>(MD))
Info.Kind = SymbolKind::Constructor;
else if (isa<CXXDestructorDecl>(MD))
Info.Kind = SymbolKind::Destructor;
else if (isa<CXXConversionDecl>(MD))
Info.Kind = SymbolKind::ConversionFunction;
else {
if (MD->isStatic())
Info.Kind = SymbolKind::StaticMethod;
else
Info.Kind = SymbolKind::InstanceMethod;
}
}
break;
case Decl::TypeAliasTemplate:
Info.Kind = SymbolKind::TypeAlias;
Info.Lang = SymbolLanguage::CXX;
Info.Properties |= (SymbolPropertySet)SymbolProperty::Generic;
break;
case Decl::TypeAlias:
Info.Kind = SymbolKind::TypeAlias;
Info.Lang = SymbolLanguage::CXX;
break;
case Decl::UnresolvedUsingTypename:
Info.Kind = SymbolKind::Using;
Info.SubKind = SymbolSubKind::UsingTypename;
Info.Lang = SymbolLanguage::CXX;
Info.Properties |= (SymbolPropertySet)SymbolProperty::Generic;
break;
case Decl::UnresolvedUsingValue:
Info.Kind = SymbolKind::Using;
Info.SubKind = SymbolSubKind::UsingValue;
Info.Lang = SymbolLanguage::CXX;
Info.Properties |= (SymbolPropertySet)SymbolProperty::Generic;
break;
case Decl::Using:
Info.Kind = SymbolKind::Using;
Info.Lang = SymbolLanguage::CXX;
break;
case Decl::Binding:
Info.Kind = SymbolKind::Variable;
Info.Lang = SymbolLanguage::CXX;
break;
case Decl::MSProperty:
Info.Kind = SymbolKind::InstanceProperty;
if (const CXXRecordDecl *CXXRec =
dyn_cast<CXXRecordDecl>(D->getDeclContext())) {
if (!CXXRec->isCLike())
Info.Lang = SymbolLanguage::CXX;
}
break;
case Decl::ClassTemplatePartialSpecialization:
case Decl::ClassScopeFunctionSpecialization:
case Decl::ClassTemplateSpecialization:
case Decl::CXXRecord:
case Decl::Enum:
case Decl::Record:
llvm_unreachable("records handled before");
break;
case Decl::VarTemplateSpecialization:
case Decl::VarTemplatePartialSpecialization:
case Decl::ImplicitParam:
case Decl::ParmVar:
case Decl::Var:
case Decl::VarTemplate:
llvm_unreachable("variables handled before");
break;
// Other decls get the 'unknown' kind.
default:
break;
}
}
if (Info.Kind == SymbolKind::Unknown)
return Info;
if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
if (FD->getTemplatedKind() ==
FunctionDecl::TK_FunctionTemplateSpecialization) {
Info.Properties |= (SymbolPropertySet)SymbolProperty::Generic;
Info.Properties |=
(SymbolPropertySet)SymbolProperty::TemplateSpecialization;
}
}
if (Info.Properties & (SymbolPropertySet)SymbolProperty::Generic)
Info.Lang = SymbolLanguage::CXX;
if (auto *attr = D->getExternalSourceSymbolAttr()) {
if (attr->getLanguage() == "Swift")
Info.Lang = SymbolLanguage::Swift;
}
return Info;
}
SymbolInfo index::getSymbolInfoForMacro(const MacroInfo &) {
SymbolInfo Info;
Info.Kind = SymbolKind::Macro;
Info.SubKind = SymbolSubKind::None;
Info.Properties = SymbolPropertySet();
Info.Lang = SymbolLanguage::C;
return Info;
}
bool index::applyForEachSymbolRoleInterruptible(SymbolRoleSet Roles,
llvm::function_ref<bool(SymbolRole)> Fn) {
#define APPLY_FOR_ROLE(Role) \
if (Roles & (unsigned)SymbolRole::Role) \
if (!Fn(SymbolRole::Role)) \
return false;
APPLY_FOR_ROLE(Declaration);
APPLY_FOR_ROLE(Definition);
APPLY_FOR_ROLE(Reference);
APPLY_FOR_ROLE(Read);
APPLY_FOR_ROLE(Write);
APPLY_FOR_ROLE(Call);
APPLY_FOR_ROLE(Dynamic);
APPLY_FOR_ROLE(AddressOf);
APPLY_FOR_ROLE(Implicit);
APPLY_FOR_ROLE(Undefinition);
APPLY_FOR_ROLE(RelationChildOf);
APPLY_FOR_ROLE(RelationBaseOf);
APPLY_FOR_ROLE(RelationOverrideOf);
APPLY_FOR_ROLE(RelationReceivedBy);
APPLY_FOR_ROLE(RelationCalledBy);
APPLY_FOR_ROLE(RelationExtendedBy);
APPLY_FOR_ROLE(RelationAccessorOf);
APPLY_FOR_ROLE(RelationContainedBy);
APPLY_FOR_ROLE(RelationIBTypeOf);
APPLY_FOR_ROLE(RelationSpecializationOf);
APPLY_FOR_ROLE(NameReference);
#undef APPLY_FOR_ROLE
return true;
}
void index::applyForEachSymbolRole(SymbolRoleSet Roles,
llvm::function_ref<void(SymbolRole)> Fn) {
applyForEachSymbolRoleInterruptible(Roles, [&](SymbolRole r) -> bool {
Fn(r);
return true;
});
}
void index::printSymbolRoles(SymbolRoleSet Roles, raw_ostream &OS) {
bool VisitedOnce = false;
applyForEachSymbolRole(Roles, [&](SymbolRole Role) {
if (VisitedOnce)
OS << ',';
else
VisitedOnce = true;
switch (Role) {
case SymbolRole::Declaration: OS << "Decl"; break;
case SymbolRole::Definition: OS << "Def"; break;
case SymbolRole::Reference: OS << "Ref"; break;
case SymbolRole::Read: OS << "Read"; break;
case SymbolRole::Write: OS << "Writ"; break;
case SymbolRole::Call: OS << "Call"; break;
case SymbolRole::Dynamic: OS << "Dyn"; break;
case SymbolRole::AddressOf: OS << "Addr"; break;
case SymbolRole::Implicit: OS << "Impl"; break;
case SymbolRole::Undefinition: OS << "Undef"; break;
case SymbolRole::RelationChildOf: OS << "RelChild"; break;
case SymbolRole::RelationBaseOf: OS << "RelBase"; break;
case SymbolRole::RelationOverrideOf: OS << "RelOver"; break;
case SymbolRole::RelationReceivedBy: OS << "RelRec"; break;
case SymbolRole::RelationCalledBy: OS << "RelCall"; break;
case SymbolRole::RelationExtendedBy: OS << "RelExt"; break;
case SymbolRole::RelationAccessorOf: OS << "RelAcc"; break;
case SymbolRole::RelationContainedBy: OS << "RelCont"; break;
case SymbolRole::RelationIBTypeOf: OS << "RelIBType"; break;
case SymbolRole::RelationSpecializationOf: OS << "RelSpecialization"; break;
case SymbolRole::NameReference: OS << "NameReference"; break;
}
});
}
bool index::printSymbolName(const Decl *D, const LangOptions &LO,
raw_ostream &OS) {
if (auto *ND = dyn_cast<NamedDecl>(D)) {
PrintingPolicy Policy(LO);
// Forward references can have different template argument names. Suppress
// the template argument names in constructors to make their name more
// stable.
Policy.SuppressTemplateArgsInCXXConstructors = true;
DeclarationName DeclName = ND->getDeclName();
if (DeclName.isEmpty())
return true;
DeclName.print(OS, Policy);
return false;
} else {
return true;
}
}
StringRef index::getSymbolKindString(SymbolKind K) {
switch (K) {
case SymbolKind::Unknown: return "<unknown>";
case SymbolKind::Module: return "module";
case SymbolKind::Namespace: return "namespace";
case SymbolKind::NamespaceAlias: return "namespace-alias";
case SymbolKind::Macro: return "macro";
case SymbolKind::Enum: return "enum";
case SymbolKind::Struct: return "struct";
case SymbolKind::Class: return "class";
case SymbolKind::Protocol: return "protocol";
case SymbolKind::Extension: return "extension";
case SymbolKind::Union: return "union";
case SymbolKind::TypeAlias: return "type-alias";
case SymbolKind::Function: return "function";
case SymbolKind::Variable: return "variable";
case SymbolKind::Field: return "field";
case SymbolKind::EnumConstant: return "enumerator";
case SymbolKind::InstanceMethod: return "instance-method";
case SymbolKind::ClassMethod: return "class-method";
case SymbolKind::StaticMethod: return "static-method";
case SymbolKind::InstanceProperty: return "instance-property";
case SymbolKind::ClassProperty: return "class-property";
case SymbolKind::StaticProperty: return "static-property";
case SymbolKind::Constructor: return "constructor";
case SymbolKind::Destructor: return "destructor";
case SymbolKind::ConversionFunction: return "conversion-func";
case SymbolKind::Parameter: return "param";
case SymbolKind::Using: return "using";
}
llvm_unreachable("invalid symbol kind");
}
StringRef index::getSymbolSubKindString(SymbolSubKind K) {
switch (K) {
case SymbolSubKind::None: return "<none>";
case SymbolSubKind::CXXCopyConstructor: return "cxx-copy-ctor";
case SymbolSubKind::CXXMoveConstructor: return "cxx-move-ctor";
case SymbolSubKind::AccessorGetter: return "acc-get";
case SymbolSubKind::AccessorSetter: return "acc-set";
case SymbolSubKind::UsingTypename: return "using-typename";
case SymbolSubKind::UsingValue: return "using-value";
}
llvm_unreachable("invalid symbol subkind");
}
StringRef index::getSymbolLanguageString(SymbolLanguage K) {
switch (K) {
case SymbolLanguage::C: return "C";
case SymbolLanguage::ObjC: return "ObjC";
case SymbolLanguage::CXX: return "C++";
case SymbolLanguage::Swift: return "Swift";
}
llvm_unreachable("invalid symbol language kind");
}
void index::applyForEachSymbolProperty(SymbolPropertySet Props,
llvm::function_ref<void(SymbolProperty)> Fn) {
#define APPLY_FOR_PROPERTY(K) \
if (Props & (SymbolPropertySet)SymbolProperty::K) \
Fn(SymbolProperty::K)
APPLY_FOR_PROPERTY(Generic);
APPLY_FOR_PROPERTY(TemplatePartialSpecialization);
APPLY_FOR_PROPERTY(TemplateSpecialization);
APPLY_FOR_PROPERTY(UnitTest);
APPLY_FOR_PROPERTY(IBAnnotated);
APPLY_FOR_PROPERTY(IBOutletCollection);
APPLY_FOR_PROPERTY(GKInspectable);
APPLY_FOR_PROPERTY(Local);
APPLY_FOR_PROPERTY(ProtocolInterface);
#undef APPLY_FOR_PROPERTY
}
void index::printSymbolProperties(SymbolPropertySet Props, raw_ostream &OS) {
bool VisitedOnce = false;
applyForEachSymbolProperty(Props, [&](SymbolProperty Prop) {
if (VisitedOnce)
OS << ',';
else
VisitedOnce = true;
switch (Prop) {
case SymbolProperty::Generic: OS << "Gen"; break;
case SymbolProperty::TemplatePartialSpecialization: OS << "TPS"; break;
case SymbolProperty::TemplateSpecialization: OS << "TS"; break;
case SymbolProperty::UnitTest: OS << "test"; break;
case SymbolProperty::IBAnnotated: OS << "IB"; break;
case SymbolProperty::IBOutletCollection: OS << "IBColl"; break;
case SymbolProperty::GKInspectable: OS << "GKI"; break;
case SymbolProperty::Local: OS << "local"; break;
case SymbolProperty::ProtocolInterface: OS << "protocol"; break;
}
});
}
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