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llvm-project/clang/lib/AST/DeclPrinter.cpp

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//===--- DeclPrinter.cpp - Printing implementation for Decl ASTs ----------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the Decl::print method, which pretty prints the
// AST back out to C/Objective-C/C++/Objective-C++ code.
//
//===----------------------------------------------------------------------===//
#include "clang/AST/ASTContext.h"
#include "clang/AST/Attr.h"
#include "clang/AST/Decl.h"
#include "clang/AST/DeclCXX.h"
#include "clang/AST/DeclObjC.h"
#include "clang/AST/DeclVisitor.h"
#include "clang/AST/Expr.h"
#include "clang/AST/ExprCXX.h"
#include "clang/AST/PrettyPrinter.h"
#include "clang/Basic/Module.h"
#include "llvm/Support/raw_ostream.h"
using namespace clang;
namespace {
class DeclPrinter : public DeclVisitor<DeclPrinter> {
raw_ostream &Out;
PrintingPolicy Policy;
unsigned Indentation;
bool PrintInstantiation;
raw_ostream& Indent() { return Indent(Indentation); }
raw_ostream& Indent(unsigned Indentation);
void ProcessDeclGroup(SmallVectorImpl<Decl*>& Decls);
void Print(AccessSpecifier AS);
/// Print an Objective-C method type in parentheses.
///
/// \param Quals The Objective-C declaration qualifiers.
/// \param T The type to print.
void PrintObjCMethodType(ASTContext &Ctx, Decl::ObjCDeclQualifier Quals,
QualType T);
void PrintObjCTypeParams(ObjCTypeParamList *Params);
public:
DeclPrinter(raw_ostream &Out, const PrintingPolicy &Policy,
unsigned Indentation = 0, bool PrintInstantiation = false)
: Out(Out), Policy(Policy), Indentation(Indentation),
PrintInstantiation(PrintInstantiation) { }
void VisitDeclContext(DeclContext *DC, bool Indent = true);
void VisitTranslationUnitDecl(TranslationUnitDecl *D);
void VisitTypedefDecl(TypedefDecl *D);
void VisitTypeAliasDecl(TypeAliasDecl *D);
void VisitEnumDecl(EnumDecl *D);
void VisitRecordDecl(RecordDecl *D);
void VisitEnumConstantDecl(EnumConstantDecl *D);
void VisitEmptyDecl(EmptyDecl *D);
void VisitFunctionDecl(FunctionDecl *D);
void VisitFriendDecl(FriendDecl *D);
void VisitFieldDecl(FieldDecl *D);
void VisitVarDecl(VarDecl *D);
void VisitLabelDecl(LabelDecl *D);
void VisitParmVarDecl(ParmVarDecl *D);
void VisitFileScopeAsmDecl(FileScopeAsmDecl *D);
void VisitImportDecl(ImportDecl *D);
void VisitStaticAssertDecl(StaticAssertDecl *D);
void VisitNamespaceDecl(NamespaceDecl *D);
void VisitUsingDirectiveDecl(UsingDirectiveDecl *D);
void VisitNamespaceAliasDecl(NamespaceAliasDecl *D);
void VisitCXXRecordDecl(CXXRecordDecl *D);
void VisitLinkageSpecDecl(LinkageSpecDecl *D);
void VisitTemplateDecl(const TemplateDecl *D);
void VisitFunctionTemplateDecl(FunctionTemplateDecl *D);
void VisitClassTemplateDecl(ClassTemplateDecl *D);
void VisitObjCMethodDecl(ObjCMethodDecl *D);
void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
void VisitObjCProtocolDecl(ObjCProtocolDecl *D);
void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
void VisitObjCCategoryDecl(ObjCCategoryDecl *D);
void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D);
void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
void VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D);
void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D);
void VisitUsingDecl(UsingDecl *D);
void VisitUsingShadowDecl(UsingShadowDecl *D);
void VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D);
void VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D);
void PrintTemplateParameters(const TemplateParameterList *Params,
const TemplateArgumentList *Args = nullptr);
void prettyPrintAttributes(Decl *D);
void prettyPrintPragmas(Decl *D);
void printDeclType(QualType T, StringRef DeclName, bool Pack = false);
};
}
void Decl::print(raw_ostream &Out, unsigned Indentation,
bool PrintInstantiation) const {
print(Out, getASTContext().getPrintingPolicy(), Indentation, PrintInstantiation);
}
void Decl::print(raw_ostream &Out, const PrintingPolicy &Policy,
unsigned Indentation, bool PrintInstantiation) const {
DeclPrinter Printer(Out, Policy, Indentation, PrintInstantiation);
Printer.Visit(const_cast<Decl*>(this));
}
static QualType GetBaseType(QualType T) {
// FIXME: This should be on the Type class!
QualType BaseType = T;
while (!BaseType->isSpecifierType()) {
if (isa<TypedefType>(BaseType))
break;
else if (const PointerType* PTy = BaseType->getAs<PointerType>())
BaseType = PTy->getPointeeType();
else if (const BlockPointerType *BPy = BaseType->getAs<BlockPointerType>())
BaseType = BPy->getPointeeType();
else if (const ArrayType* ATy = dyn_cast<ArrayType>(BaseType))
BaseType = ATy->getElementType();
else if (const FunctionType* FTy = BaseType->getAs<FunctionType>())
BaseType = FTy->getReturnType();
else if (const VectorType *VTy = BaseType->getAs<VectorType>())
BaseType = VTy->getElementType();
else if (const ReferenceType *RTy = BaseType->getAs<ReferenceType>())
BaseType = RTy->getPointeeType();
else
llvm_unreachable("Unknown declarator!");
}
return BaseType;
}
static QualType getDeclType(Decl* D) {
if (TypedefNameDecl* TDD = dyn_cast<TypedefNameDecl>(D))
return TDD->getUnderlyingType();
if (ValueDecl* VD = dyn_cast<ValueDecl>(D))
return VD->getType();
return QualType();
}
void Decl::printGroup(Decl** Begin, unsigned NumDecls,
raw_ostream &Out, const PrintingPolicy &Policy,
unsigned Indentation) {
if (NumDecls == 1) {
(*Begin)->print(Out, Policy, Indentation);
return;
}
Decl** End = Begin + NumDecls;
TagDecl* TD = dyn_cast<TagDecl>(*Begin);
if (TD)
++Begin;
PrintingPolicy SubPolicy(Policy);
if (TD && TD->isCompleteDefinition()) {
TD->print(Out, Policy, Indentation);
Out << " ";
SubPolicy.SuppressTag = true;
}
bool isFirst = true;
for ( ; Begin != End; ++Begin) {
if (isFirst) {
SubPolicy.SuppressSpecifiers = false;
isFirst = false;
} else {
if (!isFirst) Out << ", ";
SubPolicy.SuppressSpecifiers = true;
}
(*Begin)->print(Out, SubPolicy, Indentation);
}
}
LLVM_DUMP_METHOD void DeclContext::dumpDeclContext() const {
// Get the translation unit
const DeclContext *DC = this;
while (!DC->isTranslationUnit())
DC = DC->getParent();
ASTContext &Ctx = cast<TranslationUnitDecl>(DC)->getASTContext();
DeclPrinter Printer(llvm::errs(), Ctx.getPrintingPolicy(), 0);
Printer.VisitDeclContext(const_cast<DeclContext *>(this), /*Indent=*/false);
}
raw_ostream& DeclPrinter::Indent(unsigned Indentation) {
for (unsigned i = 0; i != Indentation; ++i)
Out << " ";
return Out;
}
void DeclPrinter::prettyPrintAttributes(Decl *D) {
if (Policy.PolishForDeclaration)
return;
if (D->hasAttrs()) {
AttrVec &Attrs = D->getAttrs();
for (auto *A : Attrs) {
switch (A->getKind()) {
#define ATTR(X)
#define PRAGMA_SPELLING_ATTR(X) case attr::X:
#include "clang/Basic/AttrList.inc"
break;
default:
A->printPretty(Out, Policy);
break;
}
}
}
}
void DeclPrinter::prettyPrintPragmas(Decl *D) {
if (Policy.PolishForDeclaration)
return;
if (D->hasAttrs()) {
AttrVec &Attrs = D->getAttrs();
for (auto *A : Attrs) {
switch (A->getKind()) {
#define ATTR(X)
#define PRAGMA_SPELLING_ATTR(X) case attr::X:
#include "clang/Basic/AttrList.inc"
A->printPretty(Out, Policy);
Indent();
break;
default:
break;
}
}
}
}
void DeclPrinter::printDeclType(QualType T, StringRef DeclName, bool Pack) {
// Normally, a PackExpansionType is written as T[3]... (for instance, as a
// template argument), but if it is the type of a declaration, the ellipsis
// is placed before the name being declared.
if (auto *PET = T->getAs<PackExpansionType>()) {
Pack = true;
T = PET->getPattern();
}
T.print(Out, Policy, (Pack ? "..." : "") + DeclName);
}
void DeclPrinter::ProcessDeclGroup(SmallVectorImpl<Decl*>& Decls) {
this->Indent();
Decl::printGroup(Decls.data(), Decls.size(), Out, Policy, Indentation);
Out << ";\n";
Decls.clear();
}
void DeclPrinter::Print(AccessSpecifier AS) {
switch(AS) {
case AS_none: llvm_unreachable("No access specifier!");
case AS_public: Out << "public"; break;
case AS_protected: Out << "protected"; break;
case AS_private: Out << "private"; break;
}
}
//----------------------------------------------------------------------------
// Common C declarations
//----------------------------------------------------------------------------
void DeclPrinter::VisitDeclContext(DeclContext *DC, bool Indent) {
if (Policy.TerseOutput)
return;
if (Indent)
Indentation += Policy.Indentation;
SmallVector<Decl*, 2> Decls;
for (DeclContext::decl_iterator D = DC->decls_begin(), DEnd = DC->decls_end();
D != DEnd; ++D) {
// Don't print ObjCIvarDecls, as they are printed when visiting the
// containing ObjCInterfaceDecl.
if (isa<ObjCIvarDecl>(*D))
continue;
// Skip over implicit declarations in pretty-printing mode.
if (D->isImplicit())
continue;
// The next bits of code handles stuff like "struct {int x;} a,b"; we're
// forced to merge the declarations because there's no other way to
// refer to the struct in question. This limited merging is safe without
// a bunch of other checks because it only merges declarations directly
// referring to the tag, not typedefs.
//
// Check whether the current declaration should be grouped with a previous
// unnamed struct.
QualType CurDeclType = getDeclType(*D);
if (!Decls.empty() && !CurDeclType.isNull()) {
QualType BaseType = GetBaseType(CurDeclType);
if (!BaseType.isNull() && isa<ElaboratedType>(BaseType))
BaseType = cast<ElaboratedType>(BaseType)->getNamedType();
if (!BaseType.isNull() && isa<TagType>(BaseType) &&
cast<TagType>(BaseType)->getDecl() == Decls[0]) {
Decls.push_back(*D);
continue;
}
}
// If we have a merged group waiting to be handled, handle it now.
if (!Decls.empty())
ProcessDeclGroup(Decls);
// If the current declaration is an unnamed tag type, save it
// so we can merge it with the subsequent declaration(s) using it.
if (isa<TagDecl>(*D) && !cast<TagDecl>(*D)->getIdentifier()) {
Decls.push_back(*D);
continue;
}
if (isa<AccessSpecDecl>(*D)) {
Indentation -= Policy.Indentation;
this->Indent();
Print(D->getAccess());
Out << ":\n";
Indentation += Policy.Indentation;
continue;
}
this->Indent();
Visit(*D);
// FIXME: Need to be able to tell the DeclPrinter when
const char *Terminator = nullptr;
if (isa<OMPThreadPrivateDecl>(*D))
Terminator = nullptr;
else if (isa<FunctionDecl>(*D) &&
cast<FunctionDecl>(*D)->isThisDeclarationADefinition())
Terminator = nullptr;
else if (isa<ObjCMethodDecl>(*D) && cast<ObjCMethodDecl>(*D)->getBody())
Terminator = nullptr;
else if (isa<NamespaceDecl>(*D) || isa<LinkageSpecDecl>(*D) ||
isa<ObjCImplementationDecl>(*D) ||
isa<ObjCInterfaceDecl>(*D) ||
isa<ObjCProtocolDecl>(*D) ||
isa<ObjCCategoryImplDecl>(*D) ||
isa<ObjCCategoryDecl>(*D))
Terminator = nullptr;
else if (isa<EnumConstantDecl>(*D)) {
DeclContext::decl_iterator Next = D;
++Next;
if (Next != DEnd)
Terminator = ",";
} else
Terminator = ";";
if (Terminator)
Out << Terminator;
Out << "\n";
}
if (!Decls.empty())
ProcessDeclGroup(Decls);
if (Indent)
Indentation -= Policy.Indentation;
}
void DeclPrinter::VisitTranslationUnitDecl(TranslationUnitDecl *D) {
VisitDeclContext(D, false);
}
void DeclPrinter::VisitTypedefDecl(TypedefDecl *D) {
if (!Policy.SuppressSpecifiers) {
Out << "typedef ";
if (D->isModulePrivate())
Out << "__module_private__ ";
}
D->getTypeSourceInfo()->getType().print(Out, Policy, D->getName());
prettyPrintAttributes(D);
}
void DeclPrinter::VisitTypeAliasDecl(TypeAliasDecl *D) {
Out << "using " << *D;
prettyPrintAttributes(D);
Out << " = " << D->getTypeSourceInfo()->getType().getAsString(Policy);
}
void DeclPrinter::VisitEnumDecl(EnumDecl *D) {
if (!Policy.SuppressSpecifiers && D->isModulePrivate())
Out << "__module_private__ ";
Out << "enum ";
if (D->isScoped()) {
if (D->isScopedUsingClassTag())
Out << "class ";
else
Out << "struct ";
}
Out << *D;
if (D->isFixed())
Out << " : " << D->getIntegerType().stream(Policy);
if (D->isCompleteDefinition()) {
Out << " {\n";
VisitDeclContext(D);
Indent() << "}";
}
prettyPrintAttributes(D);
}
void DeclPrinter::VisitRecordDecl(RecordDecl *D) {
if (!Policy.SuppressSpecifiers && D->isModulePrivate())
Out << "__module_private__ ";
Out << D->getKindName();
prettyPrintAttributes(D);
if (D->getIdentifier())
Out << ' ' << *D;
if (D->isCompleteDefinition()) {
Out << " {\n";
VisitDeclContext(D);
Indent() << "}";
}
}
void DeclPrinter::VisitEnumConstantDecl(EnumConstantDecl *D) {
Out << *D;
if (Expr *Init = D->getInitExpr()) {
Out << " = ";
Init->printPretty(Out, nullptr, Policy, Indentation);
}
}
void DeclPrinter::VisitFunctionDecl(FunctionDecl *D) {
if (!D->getDescribedFunctionTemplate() &&
!D->isFunctionTemplateSpecialization())
prettyPrintPragmas(D);
CXXConstructorDecl *CDecl = dyn_cast<CXXConstructorDecl>(D);
CXXConversionDecl *ConversionDecl = dyn_cast<CXXConversionDecl>(D);
if (!Policy.SuppressSpecifiers) {
switch (D->getStorageClass()) {
case SC_None: break;
case SC_Extern: Out << "extern "; break;
case SC_Static: Out << "static "; break;
case SC_PrivateExtern: Out << "__private_extern__ "; break;
case SC_Auto: case SC_Register:
llvm_unreachable("invalid for functions");
}
if (D->isInlineSpecified()) Out << "inline ";
if (D->isVirtualAsWritten()) Out << "virtual ";
if (D->isModulePrivate()) Out << "__module_private__ ";
if (D->isConstexpr() && !D->isExplicitlyDefaulted()) Out << "constexpr ";
if ((CDecl && CDecl->isExplicitSpecified()) ||
(ConversionDecl && ConversionDecl->isExplicit()))
Out << "explicit ";
}
PrintingPolicy SubPolicy(Policy);
SubPolicy.SuppressSpecifiers = false;
std::string Proto = D->getNameInfo().getAsString();
QualType Ty = D->getType();
while (const ParenType *PT = dyn_cast<ParenType>(Ty)) {
Proto = '(' + Proto + ')';
Ty = PT->getInnerType();
}
if (const FunctionType *AFT = Ty->getAs<FunctionType>()) {
const FunctionProtoType *FT = nullptr;
if (D->hasWrittenPrototype())
FT = dyn_cast<FunctionProtoType>(AFT);
Proto += "(";
if (FT) {
llvm::raw_string_ostream POut(Proto);
DeclPrinter ParamPrinter(POut, SubPolicy, Indentation);
for (unsigned i = 0, e = D->getNumParams(); i != e; ++i) {
if (i) POut << ", ";
ParamPrinter.VisitParmVarDecl(D->getParamDecl(i));
}
if (FT->isVariadic()) {
if (D->getNumParams()) POut << ", ";
POut << "...";
}
} else if (D->doesThisDeclarationHaveABody() && !D->hasPrototype()) {
for (unsigned i = 0, e = D->getNumParams(); i != e; ++i) {
if (i)
Proto += ", ";
Proto += D->getParamDecl(i)->getNameAsString();
}
}
Proto += ")";
if (FT) {
if (FT->isConst())
Proto += " const";
if (FT->isVolatile())
Proto += " volatile";
if (FT->isRestrict())
Proto += " restrict";
switch (FT->getRefQualifier()) {
case RQ_None:
break;
case RQ_LValue:
Proto += " &";
break;
case RQ_RValue:
Proto += " &&";
break;
}
}
if (FT && FT->hasDynamicExceptionSpec()) {
Proto += " throw(";
if (FT->getExceptionSpecType() == EST_MSAny)
Proto += "...";
else
for (unsigned I = 0, N = FT->getNumExceptions(); I != N; ++I) {
if (I)
Proto += ", ";
Proto += FT->getExceptionType(I).getAsString(SubPolicy);
}
Proto += ")";
} else if (FT && isNoexceptExceptionSpec(FT->getExceptionSpecType())) {
Proto += " noexcept";
if (FT->getExceptionSpecType() == EST_ComputedNoexcept) {
Proto += "(";
llvm::raw_string_ostream EOut(Proto);
FT->getNoexceptExpr()->printPretty(EOut, nullptr, SubPolicy,
Indentation);
EOut.flush();
Proto += EOut.str();
Proto += ")";
}
}
if (CDecl) {
bool HasInitializerList = false;
for (const auto *BMInitializer : CDecl->inits()) {
if (BMInitializer->isInClassMemberInitializer())
continue;
if (!HasInitializerList) {
Proto += " : ";
Out << Proto;
Proto.clear();
HasInitializerList = true;
} else
Out << ", ";
if (BMInitializer->isAnyMemberInitializer()) {
FieldDecl *FD = BMInitializer->getAnyMember();
Out << *FD;
} else {
Out << QualType(BMInitializer->getBaseClass(), 0).getAsString(Policy);
}
Out << "(";
if (!BMInitializer->getInit()) {
// Nothing to print
} else {
Expr *Init = BMInitializer->getInit();
if (ExprWithCleanups *Tmp = dyn_cast<ExprWithCleanups>(Init))
Init = Tmp->getSubExpr();
Init = Init->IgnoreParens();
Expr *SimpleInit = nullptr;
Expr **Args = nullptr;
unsigned NumArgs = 0;
if (ParenListExpr *ParenList = dyn_cast<ParenListExpr>(Init)) {
Args = ParenList->getExprs();
NumArgs = ParenList->getNumExprs();
} else if (CXXConstructExpr *Construct
= dyn_cast<CXXConstructExpr>(Init)) {
Args = Construct->getArgs();
NumArgs = Construct->getNumArgs();
} else
SimpleInit = Init;
if (SimpleInit)
SimpleInit->printPretty(Out, nullptr, Policy, Indentation);
else {
for (unsigned I = 0; I != NumArgs; ++I) {
assert(Args[I] != nullptr && "Expected non-null Expr");
if (isa<CXXDefaultArgExpr>(Args[I]))
break;
if (I)
Out << ", ";
Args[I]->printPretty(Out, nullptr, Policy, Indentation);
}
}
}
Out << ")";
if (BMInitializer->isPackExpansion())
Out << "...";
}
} else if (!ConversionDecl && !isa<CXXDestructorDecl>(D)) {
if (FT && FT->hasTrailingReturn()) {
Out << "auto " << Proto << " -> ";
Proto.clear();
}
AFT->getReturnType().print(Out, Policy, Proto);
Proto.clear();
}
Out << Proto;
} else {
Ty.print(Out, Policy, Proto);
}
prettyPrintAttributes(D);
if (D->isPure())
Out << " = 0";
else if (D->isDeletedAsWritten())
Out << " = delete";
else if (D->isExplicitlyDefaulted())
Out << " = default";
else if (D->doesThisDeclarationHaveABody() && !Policy.TerseOutput) {
if (!D->hasPrototype() && D->getNumParams()) {
// This is a K&R function definition, so we need to print the
// parameters.
Out << '\n';
DeclPrinter ParamPrinter(Out, SubPolicy, Indentation);
Indentation += Policy.Indentation;
for (unsigned i = 0, e = D->getNumParams(); i != e; ++i) {
Indent();
ParamPrinter.VisitParmVarDecl(D->getParamDecl(i));
Out << ";\n";
}
Indentation -= Policy.Indentation;
} else
Out << ' ';
if (D->getBody())
D->getBody()->printPretty(Out, nullptr, SubPolicy, Indentation);
Out << '\n';
}
}
void DeclPrinter::VisitFriendDecl(FriendDecl *D) {
if (TypeSourceInfo *TSI = D->getFriendType()) {
unsigned NumTPLists = D->getFriendTypeNumTemplateParameterLists();
for (unsigned i = 0; i < NumTPLists; ++i)
PrintTemplateParameters(D->getFriendTypeTemplateParameterList(i));
Out << "friend ";
Out << " " << TSI->getType().getAsString(Policy);
}
else if (FunctionDecl *FD =
dyn_cast<FunctionDecl>(D->getFriendDecl())) {
Out << "friend ";
VisitFunctionDecl(FD);
}
else if (FunctionTemplateDecl *FTD =
dyn_cast<FunctionTemplateDecl>(D->getFriendDecl())) {
Out << "friend ";
VisitFunctionTemplateDecl(FTD);
}
else if (ClassTemplateDecl *CTD =
dyn_cast<ClassTemplateDecl>(D->getFriendDecl())) {
Out << "friend ";
VisitRedeclarableTemplateDecl(CTD);
}
}
void DeclPrinter::VisitFieldDecl(FieldDecl *D) {
// FIXME: add printing of pragma attributes if required.
if (!Policy.SuppressSpecifiers && D->isMutable())
Out << "mutable ";
if (!Policy.SuppressSpecifiers && D->isModulePrivate())
Out << "__module_private__ ";
Out << D->getASTContext().getUnqualifiedObjCPointerType(D->getType()).
stream(Policy, D->getName());
if (D->isBitField()) {
Out << " : ";
D->getBitWidth()->printPretty(Out, nullptr, Policy, Indentation);
}
Expr *Init = D->getInClassInitializer();
if (!Policy.SuppressInitializers && Init) {
if (D->getInClassInitStyle() == ICIS_ListInit)
Out << " ";
else
Out << " = ";
Init->printPretty(Out, nullptr, Policy, Indentation);
}
prettyPrintAttributes(D);
}
void DeclPrinter::VisitLabelDecl(LabelDecl *D) {
Out << *D << ":";
}
void DeclPrinter::VisitVarDecl(VarDecl *D) {
prettyPrintPragmas(D);
if (!Policy.SuppressSpecifiers) {
StorageClass SC = D->getStorageClass();
if (SC != SC_None)
Out << VarDecl::getStorageClassSpecifierString(SC) << " ";
switch (D->getTSCSpec()) {
case TSCS_unspecified:
break;
case TSCS___thread:
Out << "__thread ";
break;
case TSCS__Thread_local:
Out << "_Thread_local ";
break;
case TSCS_thread_local:
Out << "thread_local ";
break;
}
if (D->isModulePrivate())
Out << "__module_private__ ";
}
QualType T = D->getTypeSourceInfo()
? D->getTypeSourceInfo()->getType()
: D->getASTContext().getUnqualifiedObjCPointerType(D->getType());
printDeclType(T, D->getName());
Expr *Init = D->getInit();
if (!Policy.SuppressInitializers && Init) {
bool ImplicitInit = false;
if (CXXConstructExpr *Construct =
dyn_cast<CXXConstructExpr>(Init->IgnoreImplicit())) {
if (D->getInitStyle() == VarDecl::CallInit &&
!Construct->isListInitialization()) {
ImplicitInit = Construct->getNumArgs() == 0 ||
Construct->getArg(0)->isDefaultArgument();
}
}
if (!ImplicitInit) {
if ((D->getInitStyle() == VarDecl::CallInit) && !isa<ParenListExpr>(Init))
Out << "(";
else if (D->getInitStyle() == VarDecl::CInit) {
Out << " = ";
}
PrintingPolicy SubPolicy(Policy);
SubPolicy.SuppressSpecifiers = false;
SubPolicy.SuppressTag = false;
Init->printPretty(Out, nullptr, SubPolicy, Indentation);
if ((D->getInitStyle() == VarDecl::CallInit) && !isa<ParenListExpr>(Init))
Out << ")";
}
}
prettyPrintAttributes(D);
}
void DeclPrinter::VisitParmVarDecl(ParmVarDecl *D) {
VisitVarDecl(D);
}
void DeclPrinter::VisitFileScopeAsmDecl(FileScopeAsmDecl *D) {
Out << "__asm (";
D->getAsmString()->printPretty(Out, nullptr, Policy, Indentation);
Out << ")";
}
void DeclPrinter::VisitImportDecl(ImportDecl *D) {
Out << "@import " << D->getImportedModule()->getFullModuleName()
<< ";\n";
}
void DeclPrinter::VisitStaticAssertDecl(StaticAssertDecl *D) {
Out << "static_assert(";
D->getAssertExpr()->printPretty(Out, nullptr, Policy, Indentation);
if (StringLiteral *SL = D->getMessage()) {
Out << ", ";
SL->printPretty(Out, nullptr, Policy, Indentation);
}
Out << ")";
}
//----------------------------------------------------------------------------
// C++ declarations
//----------------------------------------------------------------------------
void DeclPrinter::VisitNamespaceDecl(NamespaceDecl *D) {
if (D->isInline())
Out << "inline ";
Out << "namespace " << *D << " {\n";
VisitDeclContext(D);
Indent() << "}";
}
void DeclPrinter::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
Out << "using namespace ";
if (D->getQualifier())
D->getQualifier()->print(Out, Policy);
Out << *D->getNominatedNamespaceAsWritten();
}
void DeclPrinter::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
Out << "namespace " << *D << " = ";
if (D->getQualifier())
D->getQualifier()->print(Out, Policy);
Out << *D->getAliasedNamespace();
}
void DeclPrinter::VisitEmptyDecl(EmptyDecl *D) {
prettyPrintAttributes(D);
}
void DeclPrinter::VisitCXXRecordDecl(CXXRecordDecl *D) {
// FIXME: add printing of pragma attributes if required.
if (!Policy.SuppressSpecifiers && D->isModulePrivate())
Out << "__module_private__ ";
Out << D->getKindName();
prettyPrintAttributes(D);
if (D->getIdentifier())
Out << ' ' << *D;
if (D->isCompleteDefinition()) {
// Print the base classes
if (D->getNumBases()) {
Out << " : ";
for (CXXRecordDecl::base_class_iterator Base = D->bases_begin(),
BaseEnd = D->bases_end(); Base != BaseEnd; ++Base) {
if (Base != D->bases_begin())
Out << ", ";
if (Base->isVirtual())
Out << "virtual ";
AccessSpecifier AS = Base->getAccessSpecifierAsWritten();
if (AS != AS_none) {
Print(AS);
Out << " ";
}
Out << Base->getType().getAsString(Policy);
if (Base->isPackExpansion())
Out << "...";
}
}
// Print the class definition
// FIXME: Doesn't print access specifiers, e.g., "public:"
Out << " {\n";
VisitDeclContext(D);
Indent() << "}";
}
}
void DeclPrinter::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
const char *l;
if (D->getLanguage() == LinkageSpecDecl::lang_c)
l = "C";
else {
assert(D->getLanguage() == LinkageSpecDecl::lang_cxx &&
"unknown language in linkage specification");
l = "C++";
}
Out << "extern \"" << l << "\" ";
if (D->hasBraces()) {
Out << "{\n";
VisitDeclContext(D);
Indent() << "}";
} else
Visit(*D->decls_begin());
}
void DeclPrinter::PrintTemplateParameters(const TemplateParameterList *Params,
const TemplateArgumentList *Args) {
assert(Params);
assert(!Args || Params->size() == Args->size());
Out << "template <";
for (unsigned i = 0, e = Params->size(); i != e; ++i) {
if (i != 0)
Out << ", ";
const Decl *Param = Params->getParam(i);
if (const TemplateTypeParmDecl *TTP =
dyn_cast<TemplateTypeParmDecl>(Param)) {
if (TTP->wasDeclaredWithTypename())
Out << "typename ";
else
Out << "class ";
if (TTP->isParameterPack())
Out << "...";
Out << *TTP;
if (Args) {
Out << " = ";
Args->get(i).print(Policy, Out);
} else if (TTP->hasDefaultArgument()) {
Out << " = ";
Out << TTP->getDefaultArgument().getAsString(Policy);
};
} else if (const NonTypeTemplateParmDecl *NTTP =
dyn_cast<NonTypeTemplateParmDecl>(Param)) {
StringRef Name;
if (IdentifierInfo *II = NTTP->getIdentifier())
Name = II->getName();
printDeclType(NTTP->getType(), Name, NTTP->isParameterPack());
if (Args) {
Out << " = ";
Args->get(i).print(Policy, Out);
} else if (NTTP->hasDefaultArgument()) {
Out << " = ";
NTTP->getDefaultArgument()->printPretty(Out, nullptr, Policy,
Indentation);
}
} else if (const TemplateTemplateParmDecl *TTPD =
dyn_cast<TemplateTemplateParmDecl>(Param)) {
VisitTemplateDecl(TTPD);
// FIXME: print the default argument, if present.
}
}
Out << "> ";
}
void DeclPrinter::VisitTemplateDecl(const TemplateDecl *D) {
PrintTemplateParameters(D->getTemplateParameters());
if (const TemplateTemplateParmDecl *TTP =
dyn_cast<TemplateTemplateParmDecl>(D)) {
Out << "class ";
if (TTP->isParameterPack())
Out << "...";
Out << D->getName();
} else {
Visit(D->getTemplatedDecl());
}
}
void DeclPrinter::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
if (PrintInstantiation) {
TemplateParameterList *Params = D->getTemplateParameters();
for (auto *I : D->specializations()) {
prettyPrintPragmas(I);
PrintTemplateParameters(Params, I->getTemplateSpecializationArgs());
Visit(I);
}
}
prettyPrintPragmas(D->getTemplatedDecl());
return VisitRedeclarableTemplateDecl(D);
}
void DeclPrinter::VisitClassTemplateDecl(ClassTemplateDecl *D) {
if (PrintInstantiation) {
TemplateParameterList *Params = D->getTemplateParameters();
for (auto *I : D->specializations()) {
PrintTemplateParameters(Params, &I->getTemplateArgs());
Visit(I);
Out << '\n';
}
}
return VisitRedeclarableTemplateDecl(D);
}
//----------------------------------------------------------------------------
// Objective-C declarations
//----------------------------------------------------------------------------
void DeclPrinter::PrintObjCMethodType(ASTContext &Ctx,
Decl::ObjCDeclQualifier Quals,
QualType T) {
Out << '(';
if (Quals & Decl::ObjCDeclQualifier::OBJC_TQ_In)
Out << "in ";
if (Quals & Decl::ObjCDeclQualifier::OBJC_TQ_Inout)
Out << "inout ";
if (Quals & Decl::ObjCDeclQualifier::OBJC_TQ_Out)
Out << "out ";
if (Quals & Decl::ObjCDeclQualifier::OBJC_TQ_Bycopy)
Out << "bycopy ";
if (Quals & Decl::ObjCDeclQualifier::OBJC_TQ_Byref)
Out << "byref ";
if (Quals & Decl::ObjCDeclQualifier::OBJC_TQ_Oneway)
Out << "oneway ";
if (Quals & Decl::ObjCDeclQualifier::OBJC_TQ_CSNullability) {
if (auto nullability = AttributedType::stripOuterNullability(T))
Out << getNullabilitySpelling(*nullability, true) << ' ';
}
Out << Ctx.getUnqualifiedObjCPointerType(T).getAsString(Policy);
Out << ')';
}
void DeclPrinter::PrintObjCTypeParams(ObjCTypeParamList *Params) {
Out << "<";
unsigned First = true;
for (auto *Param : *Params) {
if (First) {
First = false;
} else {
Out << ", ";
}
switch (Param->getVariance()) {
case ObjCTypeParamVariance::Invariant:
break;
case ObjCTypeParamVariance::Covariant:
Out << "__covariant ";
break;
case ObjCTypeParamVariance::Contravariant:
Out << "__contravariant ";
break;
}
Out << Param->getDeclName().getAsString();
if (Param->hasExplicitBound()) {
Out << " : " << Param->getUnderlyingType().getAsString(Policy);
}
}
Out << ">";
}
void DeclPrinter::VisitObjCMethodDecl(ObjCMethodDecl *OMD) {
if (OMD->isInstanceMethod())
Out << "- ";
else
Out << "+ ";
if (!OMD->getReturnType().isNull()) {
PrintObjCMethodType(OMD->getASTContext(), OMD->getObjCDeclQualifier(),
OMD->getReturnType());
}
std::string name = OMD->getSelector().getAsString();
std::string::size_type pos, lastPos = 0;
for (const auto *PI : OMD->params()) {
// FIXME: selector is missing here!
pos = name.find_first_of(':', lastPos);
Out << " " << name.substr(lastPos, pos - lastPos) << ':';
PrintObjCMethodType(OMD->getASTContext(),
PI->getObjCDeclQualifier(),
PI->getType());
Out << *PI;
lastPos = pos + 1;
}
if (OMD->param_begin() == OMD->param_end())
Out << " " << name;
if (OMD->isVariadic())
Out << ", ...";
prettyPrintAttributes(OMD);
if (OMD->getBody() && !Policy.TerseOutput) {
Out << ' ';
OMD->getBody()->printPretty(Out, nullptr, Policy);
}
else if (Policy.PolishForDeclaration)
Out << ';';
}
void DeclPrinter::VisitObjCImplementationDecl(ObjCImplementationDecl *OID) {
std::string I = OID->getNameAsString();
ObjCInterfaceDecl *SID = OID->getSuperClass();
bool eolnOut = false;
if (SID)
Out << "@implementation " << I << " : " << *SID;
else
Out << "@implementation " << I;
if (OID->ivar_size() > 0) {
Out << "{\n";
eolnOut = true;
Indentation += Policy.Indentation;
for (const auto *I : OID->ivars()) {
Indent() << I->getASTContext().getUnqualifiedObjCPointerType(I->getType()).
getAsString(Policy) << ' ' << *I << ";\n";
}
Indentation -= Policy.Indentation;
Out << "}\n";
}
else if (SID || (OID->decls_begin() != OID->decls_end())) {
Out << "\n";
eolnOut = true;
}
VisitDeclContext(OID, false);
if (!eolnOut)
Out << "\n";
Out << "@end";
}
void DeclPrinter::VisitObjCInterfaceDecl(ObjCInterfaceDecl *OID) {
std::string I = OID->getNameAsString();
ObjCInterfaceDecl *SID = OID->getSuperClass();
if (!OID->isThisDeclarationADefinition()) {
Out << "@class " << I;
if (auto TypeParams = OID->getTypeParamListAsWritten()) {
PrintObjCTypeParams(TypeParams);
}
Out << ";";
return;
}
bool eolnOut = false;
Out << "@interface " << I;
if (auto TypeParams = OID->getTypeParamListAsWritten()) {
PrintObjCTypeParams(TypeParams);
}
if (SID)
Out << " : " << QualType(OID->getSuperClassType(), 0).getAsString(Policy);
// Protocols?
const ObjCList<ObjCProtocolDecl> &Protocols = OID->getReferencedProtocols();
if (!Protocols.empty()) {
for (ObjCList<ObjCProtocolDecl>::iterator I = Protocols.begin(),
E = Protocols.end(); I != E; ++I)
Out << (I == Protocols.begin() ? '<' : ',') << **I;
Out << "> ";
}
if (OID->ivar_size() > 0) {
Out << "{\n";
eolnOut = true;
Indentation += Policy.Indentation;
for (const auto *I : OID->ivars()) {
Indent() << I->getASTContext()
.getUnqualifiedObjCPointerType(I->getType())
.getAsString(Policy) << ' ' << *I << ";\n";
}
Indentation -= Policy.Indentation;
Out << "}\n";
}
else if (SID || (OID->decls_begin() != OID->decls_end())) {
Out << "\n";
eolnOut = true;
}
VisitDeclContext(OID, false);
if (!eolnOut)
Out << "\n";
Out << "@end";
// FIXME: implement the rest...
}
void DeclPrinter::VisitObjCProtocolDecl(ObjCProtocolDecl *PID) {
if (!PID->isThisDeclarationADefinition()) {
Out << "@protocol " << *PID << ";\n";
return;
}
// Protocols?
const ObjCList<ObjCProtocolDecl> &Protocols = PID->getReferencedProtocols();
if (!Protocols.empty()) {
Out << "@protocol " << *PID;
for (ObjCList<ObjCProtocolDecl>::iterator I = Protocols.begin(),
E = Protocols.end(); I != E; ++I)
Out << (I == Protocols.begin() ? '<' : ',') << **I;
Out << ">\n";
} else
Out << "@protocol " << *PID << '\n';
VisitDeclContext(PID, false);
Out << "@end";
}
void DeclPrinter::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *PID) {
Out << "@implementation " << *PID->getClassInterface() << '(' << *PID <<")\n";
VisitDeclContext(PID, false);
Out << "@end";
// FIXME: implement the rest...
}
void DeclPrinter::VisitObjCCategoryDecl(ObjCCategoryDecl *PID) {
Out << "@interface " << *PID->getClassInterface();
if (auto TypeParams = PID->getTypeParamList()) {
PrintObjCTypeParams(TypeParams);
}
Out << "(" << *PID << ")\n";
if (PID->ivar_size() > 0) {
Out << "{\n";
Indentation += Policy.Indentation;
for (const auto *I : PID->ivars())
Indent() << I->getASTContext().getUnqualifiedObjCPointerType(I->getType()).
getAsString(Policy) << ' ' << *I << ";\n";
Indentation -= Policy.Indentation;
Out << "}\n";
}
VisitDeclContext(PID, false);
Out << "@end";
// FIXME: implement the rest...
}
void DeclPrinter::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *AID) {
Out << "@compatibility_alias " << *AID
<< ' ' << *AID->getClassInterface() << ";\n";
}
/// PrintObjCPropertyDecl - print a property declaration.
///
void DeclPrinter::VisitObjCPropertyDecl(ObjCPropertyDecl *PDecl) {
if (PDecl->getPropertyImplementation() == ObjCPropertyDecl::Required)
Out << "@required\n";
else if (PDecl->getPropertyImplementation() == ObjCPropertyDecl::Optional)
Out << "@optional\n";
QualType T = PDecl->getType();
Out << "@property";
if (PDecl->getPropertyAttributes() != ObjCPropertyDecl::OBJC_PR_noattr) {
bool first = true;
Out << " (";
if (PDecl->getPropertyAttributes() &
ObjCPropertyDecl::OBJC_PR_readonly) {
Out << (first ? ' ' : ',') << "readonly";
first = false;
}
if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) {
Out << (first ? ' ' : ',') << "getter = ";
PDecl->getGetterName().print(Out);
first = false;
}
if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) {
Out << (first ? ' ' : ',') << "setter = ";
PDecl->getSetterName().print(Out);
first = false;
}
if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_assign) {
Out << (first ? ' ' : ',') << "assign";
first = false;
}
if (PDecl->getPropertyAttributes() &
ObjCPropertyDecl::OBJC_PR_readwrite) {
Out << (first ? ' ' : ',') << "readwrite";
first = false;
}
if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_retain) {
Out << (first ? ' ' : ',') << "retain";
first = false;
}
if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_strong) {
Out << (first ? ' ' : ',') << "strong";
first = false;
}
if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_copy) {
Out << (first ? ' ' : ',') << "copy";
first = false;
}
if (PDecl->getPropertyAttributes() &
ObjCPropertyDecl::OBJC_PR_nonatomic) {
Out << (first ? ' ' : ',') << "nonatomic";
first = false;
}
if (PDecl->getPropertyAttributes() &
ObjCPropertyDecl::OBJC_PR_atomic) {
Out << (first ? ' ' : ',') << "atomic";
first = false;
}
if (PDecl->getPropertyAttributes() &
ObjCPropertyDecl::OBJC_PR_nullability) {
if (auto nullability = AttributedType::stripOuterNullability(T)) {
if (*nullability == NullabilityKind::Unspecified &&
(PDecl->getPropertyAttributes() &
ObjCPropertyDecl::OBJC_PR_null_resettable)) {
Out << (first ? ' ' : ',') << "null_resettable";
} else {
Out << (first ? ' ' : ',')
<< getNullabilitySpelling(*nullability, true);
}
first = false;
}
}
if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_class) {
Out << (first ? ' ' : ',') << "class";
first = false;
}
(void) first; // Silence dead store warning due to idiomatic code.
Out << " )";
}
Out << ' ' << PDecl->getASTContext().getUnqualifiedObjCPointerType(T).
getAsString(Policy) << ' ' << *PDecl;
if (Policy.PolishForDeclaration)
Out << ';';
}
void DeclPrinter::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *PID) {
if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize)
Out << "@synthesize ";
else
Out << "@dynamic ";
Out << *PID->getPropertyDecl();
if (PID->getPropertyIvarDecl())
Out << '=' << *PID->getPropertyIvarDecl();
}
void DeclPrinter::VisitUsingDecl(UsingDecl *D) {
if (!D->isAccessDeclaration())
Out << "using ";
if (D->hasTypename())
Out << "typename ";
D->getQualifier()->print(Out, Policy);
Out << *D;
}
void
DeclPrinter::VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D) {
Out << "using typename ";
D->getQualifier()->print(Out, Policy);
Out << D->getDeclName();
}
void DeclPrinter::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
if (!D->isAccessDeclaration())
Out << "using ";
D->getQualifier()->print(Out, Policy);
Out << D->getDeclName();
}
void DeclPrinter::VisitUsingShadowDecl(UsingShadowDecl *D) {
// ignore
}
void DeclPrinter::VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D) {
Out << "#pragma omp threadprivate";
if (!D->varlist_empty()) {
for (OMPThreadPrivateDecl::varlist_iterator I = D->varlist_begin(),
E = D->varlist_end();
I != E; ++I) {
Out << (I == D->varlist_begin() ? '(' : ',');
NamedDecl *ND = cast<NamedDecl>(cast<DeclRefExpr>(*I)->getDecl());
ND->printQualifiedName(Out);
}
Out << ")";
}
}
void DeclPrinter::VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D) {
D->getInit()->printPretty(Out, nullptr, Policy, Indentation);
}
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