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//===--- TypeLoc.cpp - Type Source Info Wrapper -----------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the TypeLoc subclasses implementations.
//
//===----------------------------------------------------------------------===//
#include "llvm/Support/raw_ostream.h"
#include "clang/AST/TypeLocVisitor.h"
#include "clang/AST/Expr.h"
#include "llvm/Support/ErrorHandling.h"
using namespace clang;
//===----------------------------------------------------------------------===//
// TypeLoc Implementation
//===----------------------------------------------------------------------===//
namespace {
class TypeLocRanger : public TypeLocVisitor<TypeLocRanger, SourceRange> {
public:
#define ABSTRACT_TYPELOC(CLASS, PARENT)
#define TYPELOC(CLASS, PARENT) \
SourceRange Visit##CLASS##TypeLoc(CLASS##TypeLoc TyLoc) { \
return TyLoc.getLocalSourceRange(); \
}
#include "clang/AST/TypeLocNodes.def"
};
}
SourceRange TypeLoc::getLocalSourceRangeImpl(TypeLoc TL) {
if (TL.isNull()) return SourceRange();
return TypeLocRanger().Visit(TL);
}
namespace {
class TypeSizer : public TypeLocVisitor<TypeSizer, unsigned> {
public:
#define ABSTRACT_TYPELOC(CLASS, PARENT)
#define TYPELOC(CLASS, PARENT) \
unsigned Visit##CLASS##TypeLoc(CLASS##TypeLoc TyLoc) { \
return TyLoc.getFullDataSize(); \
}
#include "clang/AST/TypeLocNodes.def"
};
}
/// \brief Returns the size of the type source info data block.
unsigned TypeLoc::getFullDataSizeForType(QualType Ty) {
if (Ty.isNull()) return 0;
return TypeSizer().Visit(TypeLoc(Ty, 0));
}
namespace {
class NextLoc : public TypeLocVisitor<NextLoc, TypeLoc> {
public:
#define ABSTRACT_TYPELOC(CLASS, PARENT)
#define TYPELOC(CLASS, PARENT) \
TypeLoc Visit##CLASS##TypeLoc(CLASS##TypeLoc TyLoc) { \
return TyLoc.getNextTypeLoc(); \
}
#include "clang/AST/TypeLocNodes.def"
};
}
/// \brief Get the next TypeLoc pointed by this TypeLoc, e.g for "int*" the
/// TypeLoc is a PointerLoc and next TypeLoc is for "int".
TypeLoc TypeLoc::getNextTypeLocImpl(TypeLoc TL) {
return NextLoc().Visit(TL);
}
/// \brief Initializes a type location, and all of its children
/// recursively, as if the entire tree had been written in the
/// given location.
void TypeLoc::initializeImpl(ASTContext &Context, TypeLoc TL,
SourceLocation Loc) {
while (true) {
switch (TL.getTypeLocClass()) {
#define ABSTRACT_TYPELOC(CLASS, PARENT)
#define TYPELOC(CLASS, PARENT) \
case CLASS: { \
CLASS##TypeLoc TLCasted = cast<CLASS##TypeLoc>(TL); \
TLCasted.initializeLocal(Context, Loc); \
TL = TLCasted.getNextTypeLoc(); \
if (!TL) return; \
continue; \
}
#include "clang/AST/TypeLocNodes.def"
}
}
}
SourceLocation TypeLoc::getBeginLoc() const {
TypeLoc Cur = *this;
while (true) {
switch (Cur.getTypeLocClass()) {
// FIXME: Currently QualifiedTypeLoc does not have a source range
// case Qualified:
case Elaborated:
case DependentName:
case DependentTemplateSpecialization:
break;
default:
TypeLoc Next = Cur.getNextTypeLoc();
if (Next.isNull()) break;
Cur = Next;
continue;
}
break;
}
return Cur.getLocalSourceRange().getBegin();
}
SourceLocation TypeLoc::getEndLoc() const {
TypeLoc Cur = *this;
TypeLoc Last;
while (true) {
switch (Cur.getTypeLocClass()) {
default:
if (!Last)
Last = Cur;
return Last.getLocalSourceRange().getEnd();
case Paren:
case ConstantArray:
case DependentSizedArray:
case IncompleteArray:
case VariableArray:
case FunctionProto:
case FunctionNoProto:
Last = Cur;
break;
case Pointer:
case BlockPointer:
case MemberPointer:
case LValueReference:
case RValueReference:
case PackExpansion:
if (!Last)
Last = Cur;
break;
case Qualified:
case Elaborated:
break;
}
Cur = Cur.getNextTypeLoc();
}
}
namespace {
struct TSTChecker : public TypeLocVisitor<TSTChecker, bool> {
// Overload resolution does the real work for us.
static bool isTypeSpec(TypeSpecTypeLoc _) { return true; }
static bool isTypeSpec(TypeLoc _) { return false; }
#define ABSTRACT_TYPELOC(CLASS, PARENT)
#define TYPELOC(CLASS, PARENT) \
bool Visit##CLASS##TypeLoc(CLASS##TypeLoc TyLoc) { \
return isTypeSpec(TyLoc); \
}
#include "clang/AST/TypeLocNodes.def"
};
}
/// \brief Determines if the given type loc corresponds to a
/// TypeSpecTypeLoc. Since there is not actually a TypeSpecType in
/// the type hierarchy, this is made somewhat complicated.
///
/// There are a lot of types that currently use TypeSpecTypeLoc
/// because it's a convenient base class. Ideally we would not accept
/// those here, but ideally we would have better implementations for
/// them.
bool TypeSpecTypeLoc::classof(const TypeLoc *TL) {
if (TL->getType().hasLocalQualifiers()) return false;
return TSTChecker().Visit(*TL);
}
// Reimplemented to account for GNU/C++ extension
// typeof unary-expression
// where there are no parentheses.
SourceRange TypeOfExprTypeLoc::getLocalSourceRange() const {
if (getRParenLoc().isValid())
return SourceRange(getTypeofLoc(), getRParenLoc());
else
return SourceRange(getTypeofLoc(),
getUnderlyingExpr()->getSourceRange().getEnd());
}
TypeSpecifierType BuiltinTypeLoc::getWrittenTypeSpec() const {
if (needsExtraLocalData())
return static_cast<TypeSpecifierType>(getWrittenBuiltinSpecs().Type);
switch (getTypePtr()->getKind()) {
case BuiltinType::Void:
return TST_void;
case BuiltinType::Bool:
return TST_bool;
case BuiltinType::Char_U:
case BuiltinType::Char_S:
return TST_char;
case BuiltinType::Char16:
return TST_char16;
case BuiltinType::Char32:
return TST_char32;
case BuiltinType::WChar_S:
case BuiltinType::WChar_U:
return TST_wchar;
case BuiltinType::UChar:
case BuiltinType::UShort:
case BuiltinType::UInt:
case BuiltinType::ULong:
case BuiltinType::ULongLong:
case BuiltinType::UInt128:
case BuiltinType::SChar:
case BuiltinType::Short:
case BuiltinType::Int:
case BuiltinType::Long:
case BuiltinType::LongLong:
case BuiltinType::Int128:
case BuiltinType::Half:
case BuiltinType::Float:
case BuiltinType::Double:
case BuiltinType::LongDouble:
llvm_unreachable("Builtin type needs extra local data!");
// Fall through, if the impossible happens.
case BuiltinType::NullPtr:
case BuiltinType::Overload:
case BuiltinType::Dependent:
case BuiltinType::BoundMember:
case BuiltinType::UnknownAny:
case BuiltinType::ARCUnbridgedCast:
case BuiltinType::PseudoObject:
case BuiltinType::ObjCId:
case BuiltinType::ObjCClass:
case BuiltinType::ObjCSel:
return TST_unspecified;
}
llvm_unreachable("Invalid BuiltinType Kind!");
}
TypeLoc TypeLoc::IgnoreParensImpl(TypeLoc TL) {
while (ParenTypeLoc* PTL = dyn_cast<ParenTypeLoc>(&TL))
TL = PTL->getInnerLoc();
return TL;
}
void ElaboratedTypeLoc::initializeLocal(ASTContext &Context,
SourceLocation Loc) {
setElaboratedKeywordLoc(Loc);
NestedNameSpecifierLocBuilder Builder;
Builder.MakeTrivial(Context, getTypePtr()->getQualifier(), Loc);
setQualifierLoc(Builder.getWithLocInContext(Context));
}
void DependentNameTypeLoc::initializeLocal(ASTContext &Context,
SourceLocation Loc) {
setElaboratedKeywordLoc(Loc);
NestedNameSpecifierLocBuilder Builder;
Builder.MakeTrivial(Context, getTypePtr()->getQualifier(), Loc);
setQualifierLoc(Builder.getWithLocInContext(Context));
setNameLoc(Loc);
}
void
DependentTemplateSpecializationTypeLoc::initializeLocal(ASTContext &Context,
SourceLocation Loc) {
setElaboratedKeywordLoc(Loc);
if (getTypePtr()->getQualifier()) {
NestedNameSpecifierLocBuilder Builder;
Builder.MakeTrivial(Context, getTypePtr()->getQualifier(), Loc);
setQualifierLoc(Builder.getWithLocInContext(Context));
} else {
setQualifierLoc(NestedNameSpecifierLoc());
}
setTemplateNameLoc(Loc);
setLAngleLoc(Loc);
setRAngleLoc(Loc);
TemplateSpecializationTypeLoc::initializeArgLocs(Context, getNumArgs(),
getTypePtr()->getArgs(),
getArgInfos(), Loc);
}
void TemplateSpecializationTypeLoc::initializeArgLocs(ASTContext &Context,
unsigned NumArgs,
const TemplateArgument *Args,
TemplateArgumentLocInfo *ArgInfos,
SourceLocation Loc) {
for (unsigned i = 0, e = NumArgs; i != e; ++i) {
switch (Args[i].getKind()) {
case TemplateArgument::Null:
case TemplateArgument::Declaration:
case TemplateArgument::Integral:
case TemplateArgument::Pack:
case TemplateArgument::Expression:
ArgInfos[i] = TemplateArgumentLocInfo(Args[i].getAsExpr());
break;
case TemplateArgument::Type:
ArgInfos[i] = TemplateArgumentLocInfo(
Context.getTrivialTypeSourceInfo(Args[i].getAsType(),
Loc));
break;
case TemplateArgument::Template:
case TemplateArgument::TemplateExpansion: {
NestedNameSpecifierLocBuilder Builder;
TemplateName Template = Args[i].getAsTemplate();
if (DependentTemplateName *DTN = Template.getAsDependentTemplateName())
Builder.MakeTrivial(Context, DTN->getQualifier(), Loc);
else if (QualifiedTemplateName *QTN = Template.getAsQualifiedTemplateName())
Builder.MakeTrivial(Context, QTN->getQualifier(), Loc);
ArgInfos[i] = TemplateArgumentLocInfo(
Builder.getWithLocInContext(Context),
Loc,
Args[i].getKind() == TemplateArgument::Template
? SourceLocation()
: Loc);
break;
}
}
}
}