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//===-- DeclCXX.h - Classes for representing C++ declarations -*- 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 C++ Decl subclasses, other than those for
// templates (in DeclTemplate.h) and friends (in DeclFriend.h).
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_AST_DECLCXX_H
#define LLVM_CLANG_AST_DECLCXX_H
#include "clang/AST/Expr.h"
#include "clang/AST/ExprCXX.h"
#include "clang/AST/Decl.h"
#include "clang/AST/TypeLoc.h"
#include "clang/AST/UnresolvedSet.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/PointerIntPair.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/Support/Compiler.h"
namespace clang {
class ClassTemplateDecl;
class ClassTemplateSpecializationDecl;
class CXXBasePath;
class CXXBasePaths;
class CXXConstructorDecl;
class CXXConversionDecl;
class CXXDestructorDecl;
class CXXMethodDecl;
class CXXRecordDecl;
class CXXMemberLookupCriteria;
class CXXFinalOverriderMap;
class CXXIndirectPrimaryBaseSet;
class FriendDecl;
class LambdaExpr;
class UsingDecl;
/// \brief Represents any kind of function declaration, whether it is a
/// concrete function or a function template.
class AnyFunctionDecl {
NamedDecl *Function;
AnyFunctionDecl(NamedDecl *ND) : Function(ND) { }
public:
AnyFunctionDecl(FunctionDecl *FD) : Function(FD) { }
AnyFunctionDecl(FunctionTemplateDecl *FTD);
/// \brief Implicily converts any function or function template into a
/// named declaration.
operator NamedDecl *() const { return Function; }
/// \brief Retrieve the underlying function or function template.
NamedDecl *get() const { return Function; }
static AnyFunctionDecl getFromNamedDecl(NamedDecl *ND) {
return AnyFunctionDecl(ND);
}
};
} // end namespace clang
namespace llvm {
/// Implement simplify_type for AnyFunctionDecl, so that we can dyn_cast from
/// AnyFunctionDecl to any function or function template declaration.
template<> struct simplify_type<const ::clang::AnyFunctionDecl> {
typedef ::clang::NamedDecl* SimpleType;
static SimpleType getSimplifiedValue(const ::clang::AnyFunctionDecl &Val) {
return Val;
}
};
template<> struct simplify_type< ::clang::AnyFunctionDecl>
: public simplify_type<const ::clang::AnyFunctionDecl> {};
// Provide PointerLikeTypeTraits for non-cvr pointers.
template<>
class PointerLikeTypeTraits< ::clang::AnyFunctionDecl> {
public:
static inline void *getAsVoidPointer(::clang::AnyFunctionDecl F) {
return F.get();
}
static inline ::clang::AnyFunctionDecl getFromVoidPointer(void *P) {
return ::clang::AnyFunctionDecl::getFromNamedDecl(
static_cast< ::clang::NamedDecl*>(P));
}
enum { NumLowBitsAvailable = 2 };
};
} // end namespace llvm
namespace clang {
/// @brief Represents an access specifier followed by colon ':'.
///
/// An objects of this class represents sugar for the syntactic occurrence
/// of an access specifier followed by a colon in the list of member
/// specifiers of a C++ class definition.
///
/// Note that they do not represent other uses of access specifiers,
/// such as those occurring in a list of base specifiers.
/// Also note that this class has nothing to do with so-called
/// "access declarations" (C++98 11.3 [class.access.dcl]).
class AccessSpecDecl : public Decl {
virtual void anchor();
/// \brief The location of the ':'.
SourceLocation ColonLoc;
AccessSpecDecl(AccessSpecifier AS, DeclContext *DC,
SourceLocation ASLoc, SourceLocation ColonLoc)
: Decl(AccessSpec, DC, ASLoc), ColonLoc(ColonLoc) {
setAccess(AS);
}
AccessSpecDecl(EmptyShell Empty)
: Decl(AccessSpec, Empty) { }
public:
/// \brief The location of the access specifier.
SourceLocation getAccessSpecifierLoc() const { return getLocation(); }
/// \brief Sets the location of the access specifier.
void setAccessSpecifierLoc(SourceLocation ASLoc) { setLocation(ASLoc); }
/// \brief The location of the colon following the access specifier.
SourceLocation getColonLoc() const { return ColonLoc; }
/// \brief Sets the location of the colon.
void setColonLoc(SourceLocation CLoc) { ColonLoc = CLoc; }
SourceRange getSourceRange() const LLVM_READONLY {
return SourceRange(getAccessSpecifierLoc(), getColonLoc());
}
static AccessSpecDecl *Create(ASTContext &C, AccessSpecifier AS,
DeclContext *DC, SourceLocation ASLoc,
SourceLocation ColonLoc) {
return new (C) AccessSpecDecl(AS, DC, ASLoc, ColonLoc);
}
static AccessSpecDecl *CreateDeserialized(ASTContext &C, unsigned ID);
// Implement isa/cast/dyncast/etc.
static bool classof(const Decl *D) { return classofKind(D->getKind()); }
static bool classof(const AccessSpecDecl *D) { return true; }
static bool classofKind(Kind K) { return K == AccessSpec; }
};
/// \brief Represents a base class of a C++ class.
///
/// Each CXXBaseSpecifier represents a single, direct base class (or
/// struct) of a C++ class (or struct). It specifies the type of that
/// base class, whether it is a virtual or non-virtual base, and what
/// level of access (public, protected, private) is used for the
/// derivation. For example:
///
/// @code
/// class A { };
/// class B { };
/// class C : public virtual A, protected B { };
/// @endcode
///
/// In this code, C will have two CXXBaseSpecifiers, one for "public
/// virtual A" and the other for "protected B".
class CXXBaseSpecifier {
/// Range - The source code range that covers the full base
/// specifier, including the "virtual" (if present) and access
/// specifier (if present).
SourceRange Range;
/// \brief The source location of the ellipsis, if this is a pack
/// expansion.
SourceLocation EllipsisLoc;
/// \brief Whether this is a virtual base class or not.
bool Virtual : 1;
/// BaseOfClass - Whether this is the base of a class (true) or of a
/// struct (false). This determines the mapping from the access
/// specifier as written in the source code to the access specifier
/// used for semantic analysis.
bool BaseOfClass : 1;
/// Access - Access specifier as written in the source code (which
/// may be AS_none). The actual type of data stored here is an
/// AccessSpecifier, but we use "unsigned" here to work around a
/// VC++ bug.
unsigned Access : 2;
/// InheritConstructors - Whether the class contains a using declaration
/// to inherit the named class's constructors.
bool InheritConstructors : 1;
/// BaseTypeInfo - The type of the base class. This will be a class or struct
/// (or a typedef of such). The source code range does not include the
/// "virtual" or access specifier.
TypeSourceInfo *BaseTypeInfo;
public:
CXXBaseSpecifier() { }
CXXBaseSpecifier(SourceRange R, bool V, bool BC, AccessSpecifier A,
TypeSourceInfo *TInfo, SourceLocation EllipsisLoc)
: Range(R), EllipsisLoc(EllipsisLoc), Virtual(V), BaseOfClass(BC),
Access(A), InheritConstructors(false), BaseTypeInfo(TInfo) { }
/// getSourceRange - Retrieves the source range that contains the
/// entire base specifier.
SourceRange getSourceRange() const LLVM_READONLY { return Range; }
SourceLocation getLocStart() const LLVM_READONLY { return Range.getBegin(); }
SourceLocation getLocEnd() const LLVM_READONLY { return Range.getEnd(); }
/// isVirtual - Determines whether the base class is a virtual base
/// class (or not).
bool isVirtual() const { return Virtual; }
/// \brief Determine whether this base class is a base of a class declared
/// with the 'class' keyword (vs. one declared with the 'struct' keyword).
bool isBaseOfClass() const { return BaseOfClass; }
/// \brief Determine whether this base specifier is a pack expansion.
bool isPackExpansion() const { return EllipsisLoc.isValid(); }
/// \brief Determine whether this base class's constructors get inherited.
bool getInheritConstructors() const { return InheritConstructors; }
/// \brief Set that this base class's constructors should be inherited.
void setInheritConstructors(bool Inherit = true) {
InheritConstructors = Inherit;
}
/// \brief For a pack expansion, determine the location of the ellipsis.
SourceLocation getEllipsisLoc() const {
return EllipsisLoc;
}
/// getAccessSpecifier - Returns the access specifier for this base
/// specifier. This is the actual base specifier as used for
/// semantic analysis, so the result can never be AS_none. To
/// retrieve the access specifier as written in the source code, use
/// getAccessSpecifierAsWritten().
AccessSpecifier getAccessSpecifier() const {
if ((AccessSpecifier)Access == AS_none)
return BaseOfClass? AS_private : AS_public;
else
return (AccessSpecifier)Access;
}
/// getAccessSpecifierAsWritten - Retrieves the access specifier as
/// written in the source code (which may mean that no access
/// specifier was explicitly written). Use getAccessSpecifier() to
/// retrieve the access specifier for use in semantic analysis.
AccessSpecifier getAccessSpecifierAsWritten() const {
return (AccessSpecifier)Access;
}
/// getType - Retrieves the type of the base class. This type will
/// always be an unqualified class type.
QualType getType() const { return BaseTypeInfo->getType(); }
/// getTypeLoc - Retrieves the type and source location of the base class.
TypeSourceInfo *getTypeSourceInfo() const { return BaseTypeInfo; }
};
/// CXXRecordDecl - Represents a C++ struct/union/class.
/// FIXME: This class will disappear once we've properly taught RecordDecl
/// to deal with C++-specific things.
class CXXRecordDecl : public RecordDecl {
friend void TagDecl::startDefinition();
struct DefinitionData {
DefinitionData(CXXRecordDecl *D);
/// UserDeclaredConstructor - True when this class has a
/// user-declared constructor.
bool UserDeclaredConstructor : 1;
/// UserDeclaredCopyConstructor - True when this class has a
/// user-declared copy constructor.
bool UserDeclaredCopyConstructor : 1;
/// UserDeclareMoveConstructor - True when this class has a
/// user-declared move constructor.
bool UserDeclaredMoveConstructor : 1;
/// UserDeclaredCopyAssignment - True when this class has a
/// user-declared copy assignment operator.
bool UserDeclaredCopyAssignment : 1;
/// UserDeclareMoveAssignment - True when this class has a
/// user-declared move assignment.
bool UserDeclaredMoveAssignment : 1;
/// UserDeclaredDestructor - True when this class has a
/// user-declared destructor.
bool UserDeclaredDestructor : 1;
/// Aggregate - True when this class is an aggregate.
bool Aggregate : 1;
/// PlainOldData - True when this class is a POD-type.
bool PlainOldData : 1;
/// Empty - true when this class is empty for traits purposes,
/// i.e. has no data members other than 0-width bit-fields, has no
/// virtual function/base, and doesn't inherit from a non-empty
/// class. Doesn't take union-ness into account.
bool Empty : 1;
/// Polymorphic - True when this class is polymorphic, i.e. has at
/// least one virtual member or derives from a polymorphic class.
bool Polymorphic : 1;
/// Abstract - True when this class is abstract, i.e. has at least
/// one pure virtual function, (that can come from a base class).
bool Abstract : 1;
/// IsStandardLayout - True when this class has standard layout.
///
/// C++0x [class]p7. A standard-layout class is a class that:
/// * has no non-static data members of type non-standard-layout class (or
/// array of such types) or reference,
/// * has no virtual functions (10.3) and no virtual base classes (10.1),
/// * has the same access control (Clause 11) for all non-static data
/// members
/// * has no non-standard-layout base classes,
/// * either has no non-static data members in the most derived class and at
/// most one base class with non-static data members, or has no base
/// classes with non-static data members, and
/// * has no base classes of the same type as the first non-static data
/// member.
bool IsStandardLayout : 1;
/// HasNoNonEmptyBases - True when there are no non-empty base classes.
///
/// This is a helper bit of state used to implement IsStandardLayout more
/// efficiently.
bool HasNoNonEmptyBases : 1;
/// HasPrivateFields - True when there are private non-static data members.
bool HasPrivateFields : 1;
/// HasProtectedFields - True when there are protected non-static data
/// members.
bool HasProtectedFields : 1;
/// HasPublicFields - True when there are private non-static data members.
bool HasPublicFields : 1;
/// \brief True if this class (or any subobject) has mutable fields.
bool HasMutableFields : 1;
/// \brief True if there no non-field members declared by the user.
bool HasOnlyCMembers : 1;
/// \brief True if any field has an in-class initializer.
bool HasInClassInitializer : 1;
/// HasTrivialDefaultConstructor - True when, if this class has a default
/// constructor, this default constructor is trivial.
///
/// C++0x [class.ctor]p5
/// A default constructor is trivial if it is not user-provided and if
/// -- its class has no virtual functions and no virtual base classes,
/// and
/// -- no non-static data member of its class has a
/// brace-or-equal-initializer, and
/// -- all the direct base classes of its class have trivial
/// default constructors, and
/// -- for all the nonstatic data members of its class that are of class
/// type (or array thereof), each such class has a trivial
/// default constructor.
bool HasTrivialDefaultConstructor : 1;
/// HasConstexprNonCopyMoveConstructor - True when this class has at least
/// one user-declared constexpr constructor which is neither the copy nor
/// move constructor.
bool HasConstexprNonCopyMoveConstructor : 1;
/// DefaultedDefaultConstructorIsConstexpr - True if a defaulted default
/// constructor for this class would be constexpr.
bool DefaultedDefaultConstructorIsConstexpr : 1;
/// HasConstexprDefaultConstructor - True if this class has a constexpr
/// default constructor (either user-declared or implicitly declared).
bool HasConstexprDefaultConstructor : 1;
/// HasTrivialCopyConstructor - True when this class has a trivial copy
/// constructor.
///
/// C++0x [class.copy]p13:
/// A copy/move constructor for class X is trivial if it is neither
/// user-provided and if
/// -- class X has no virtual functions and no virtual base classes, and
/// -- the constructor selected to copy/move each direct base class
/// subobject is trivial, and
/// -- for each non-static data member of X that is of class type (or an
/// array thereof), the constructor selected to copy/move that member
/// is trivial;
/// otherwise the copy/move constructor is non-trivial.
bool HasTrivialCopyConstructor : 1;
/// HasTrivialMoveConstructor - True when this class has a trivial move
/// constructor.
///
/// C++0x [class.copy]p13:
/// A copy/move constructor for class X is trivial if it is neither
/// user-provided and if
/// -- class X has no virtual functions and no virtual base classes, and
/// -- the constructor selected to copy/move each direct base class
/// subobject is trivial, and
/// -- for each non-static data member of X that is of class type (or an
/// array thereof), the constructor selected to copy/move that member
/// is trivial;
/// otherwise the copy/move constructor is non-trivial.
bool HasTrivialMoveConstructor : 1;
/// HasTrivialCopyAssignment - True when this class has a trivial copy
/// assignment operator.
///
/// C++0x [class.copy]p27:
/// A copy/move assignment operator for class X is trivial if it is
/// neither user-provided nor deleted and if
/// -- class X has no virtual functions and no virtual base classes, and
/// -- the assignment operator selected to copy/move each direct base
/// class subobject is trivial, and
/// -- for each non-static data member of X that is of class type (or an
/// array thereof), the assignment operator selected to copy/move
/// that member is trivial;
/// otherwise the copy/move assignment operator is non-trivial.
bool HasTrivialCopyAssignment : 1;
/// HasTrivialMoveAssignment - True when this class has a trivial move
/// assignment operator.
///
/// C++0x [class.copy]p27:
/// A copy/move assignment operator for class X is trivial if it is
/// neither user-provided nor deleted and if
/// -- class X has no virtual functions and no virtual base classes, and
/// -- the assignment operator selected to copy/move each direct base
/// class subobject is trivial, and
/// -- for each non-static data member of X that is of class type (or an
/// array thereof), the assignment operator selected to copy/move
/// that member is trivial;
/// otherwise the copy/move assignment operator is non-trivial.
bool HasTrivialMoveAssignment : 1;
/// HasTrivialDestructor - True when this class has a trivial destructor.
///
/// C++ [class.dtor]p3. A destructor is trivial if it is an
/// implicitly-declared destructor and if:
/// * all of the direct base classes of its class have trivial destructors
/// and
/// * for all of the non-static data members of its class that are of class
/// type (or array thereof), each such class has a trivial destructor.
bool HasTrivialDestructor : 1;
/// HasIrrelevantDestructor - True when this class has a destructor with no
/// semantic effect.
bool HasIrrelevantDestructor : 1;
/// HasNonLiteralTypeFieldsOrBases - True when this class contains at least
/// one non-static data member or base class of non-literal or volatile
/// type.
bool HasNonLiteralTypeFieldsOrBases : 1;
/// ComputedVisibleConversions - True when visible conversion functions are
/// already computed and are available.
bool ComputedVisibleConversions : 1;
/// \brief Whether we have a C++0x user-provided default constructor (not
/// explicitly deleted or defaulted).
bool UserProvidedDefaultConstructor : 1;
/// \brief Whether we have already declared the default constructor.
bool DeclaredDefaultConstructor : 1;
/// \brief Whether we have already declared the copy constructor.
bool DeclaredCopyConstructor : 1;
/// \brief Whether we have already declared the move constructor.
bool DeclaredMoveConstructor : 1;
/// \brief Whether we have already declared the copy-assignment operator.
bool DeclaredCopyAssignment : 1;
/// \brief Whether we have already declared the move-assignment operator.
bool DeclaredMoveAssignment : 1;
/// \brief Whether we have already declared a destructor within the class.
bool DeclaredDestructor : 1;
/// \brief Whether an implicit move constructor was attempted to be declared
/// but would have been deleted.
bool FailedImplicitMoveConstructor : 1;
/// \brief Whether an implicit move assignment operator was attempted to be
/// declared but would have been deleted.
bool FailedImplicitMoveAssignment : 1;
/// \brief Whether this class describes a C++ lambda.
bool IsLambda : 1;
/// NumBases - The number of base class specifiers in Bases.
unsigned NumBases;
/// NumVBases - The number of virtual base class specifiers in VBases.
unsigned NumVBases;
/// Bases - Base classes of this class.
/// FIXME: This is wasted space for a union.
LazyCXXBaseSpecifiersPtr Bases;
/// VBases - direct and indirect virtual base classes of this class.
LazyCXXBaseSpecifiersPtr VBases;
/// Conversions - Overload set containing the conversion functions
/// of this C++ class (but not its inherited conversion
/// functions). Each of the entries in this overload set is a
/// CXXConversionDecl.
UnresolvedSet<4> Conversions;
/// VisibleConversions - Overload set containing the conversion
/// functions of this C++ class and all those inherited conversion
/// functions that are visible in this class. Each of the entries
/// in this overload set is a CXXConversionDecl or a
/// FunctionTemplateDecl.
UnresolvedSet<4> VisibleConversions;
/// Definition - The declaration which defines this record.
CXXRecordDecl *Definition;
/// FirstFriend - The first friend declaration in this class, or
/// null if there aren't any. This is actually currently stored
/// in reverse order.
FriendDecl *FirstFriend;
/// \brief Retrieve the set of direct base classes.
CXXBaseSpecifier *getBases() const {
if (!Bases.isOffset())
return Bases.get(0);
return getBasesSlowCase();
}
/// \brief Retrieve the set of virtual base classes.
CXXBaseSpecifier *getVBases() const {
if (!VBases.isOffset())
return VBases.get(0);
return getVBasesSlowCase();
}
private:
CXXBaseSpecifier *getBasesSlowCase() const;
CXXBaseSpecifier *getVBasesSlowCase() const;
} *DefinitionData;
/// \brief Describes a C++ closure type (generated by a lambda expression).
struct LambdaDefinitionData : public DefinitionData {
typedef LambdaExpr::Capture Capture;
LambdaDefinitionData(CXXRecordDecl *D, bool Dependent)
: DefinitionData(D), Dependent(Dependent), NumCaptures(0),
NumExplicitCaptures(0), ManglingNumber(0), ContextDecl(0), Captures(0)
{
IsLambda = true;
}
/// \brief Whether this lambda is known to be dependent, even if its
/// context isn't dependent.
///
/// A lambda with a non-dependent context can be dependent if it occurs
/// within the default argument of a function template, because the
/// lambda will have been created with the enclosing context as its
/// declaration context, rather than function. This is an unfortunate
/// artifact of having to parse the default arguments before
unsigned Dependent : 1;
/// \brief The number of captures in this lambda.
unsigned NumCaptures : 16;
/// \brief The number of explicit captures in this lambda.
unsigned NumExplicitCaptures : 15;
/// \brief The number used to indicate this lambda expression for name
/// mangling in the Itanium C++ ABI.
unsigned ManglingNumber;
/// \brief The declaration that provides context for this lambda, if the
/// actual DeclContext does not suffice. This is used for lambdas that
/// occur within default arguments of function parameters within the class
/// or within a data member initializer.
Decl *ContextDecl;
/// \brief The list of captures, both explicit and implicit, for this
/// lambda.
Capture *Captures;
};
struct DefinitionData &data() {
assert(DefinitionData && "queried property of class with no definition");
return *DefinitionData;
}
const struct DefinitionData &data() const {
assert(DefinitionData && "queried property of class with no definition");
return *DefinitionData;
}
struct LambdaDefinitionData &getLambdaData() const {
assert(DefinitionData && "queried property of lambda with no definition");
assert(DefinitionData->IsLambda &&
"queried lambda property of non-lambda class");
return static_cast<LambdaDefinitionData &>(*DefinitionData);
}
/// \brief The template or declaration that this declaration
/// describes or was instantiated from, respectively.
///
/// For non-templates, this value will be NULL. For record
/// declarations that describe a class template, this will be a
/// pointer to a ClassTemplateDecl. For member
/// classes of class template specializations, this will be the
/// MemberSpecializationInfo referring to the member class that was
/// instantiated or specialized.
llvm::PointerUnion<ClassTemplateDecl*, MemberSpecializationInfo*>
TemplateOrInstantiation;
friend class DeclContext;
friend class LambdaExpr;
/// \brief Notify the class that member has been added.
///
/// This routine helps maintain information about the class based on which
/// members have been added. It will be invoked by DeclContext::addDecl()
/// whenever a member is added to this record.
void addedMember(Decl *D);
void markedVirtualFunctionPure();
friend void FunctionDecl::setPure(bool);
void markedConstructorConstexpr(CXXConstructorDecl *CD);
friend void FunctionDecl::setConstexpr(bool);
friend class ASTNodeImporter;
protected:
CXXRecordDecl(Kind K, TagKind TK, DeclContext *DC,
SourceLocation StartLoc, SourceLocation IdLoc,
IdentifierInfo *Id, CXXRecordDecl *PrevDecl);
public:
/// base_class_iterator - Iterator that traverses the base classes
/// of a class.
typedef CXXBaseSpecifier* base_class_iterator;
/// base_class_const_iterator - Iterator that traverses the base
/// classes of a class.
typedef const CXXBaseSpecifier* base_class_const_iterator;
/// reverse_base_class_iterator = Iterator that traverses the base classes
/// of a class in reverse order.
typedef std::reverse_iterator<base_class_iterator>
reverse_base_class_iterator;
/// reverse_base_class_iterator = Iterator that traverses the base classes
/// of a class in reverse order.
typedef std::reverse_iterator<base_class_const_iterator>
reverse_base_class_const_iterator;
virtual CXXRecordDecl *getCanonicalDecl() {
return cast<CXXRecordDecl>(RecordDecl::getCanonicalDecl());
}
virtual const CXXRecordDecl *getCanonicalDecl() const {
return cast<CXXRecordDecl>(RecordDecl::getCanonicalDecl());
}
const CXXRecordDecl *getPreviousDecl() const {
return cast_or_null<CXXRecordDecl>(RecordDecl::getPreviousDecl());
}
CXXRecordDecl *getPreviousDecl() {
return cast_or_null<CXXRecordDecl>(RecordDecl::getPreviousDecl());
}
const CXXRecordDecl *getMostRecentDecl() const {
return cast_or_null<CXXRecordDecl>(RecordDecl::getMostRecentDecl());
}
CXXRecordDecl *getMostRecentDecl() {
return cast_or_null<CXXRecordDecl>(RecordDecl::getMostRecentDecl());
}
CXXRecordDecl *getDefinition() const {
if (!DefinitionData) return 0;
return data().Definition;
}
bool hasDefinition() const { return DefinitionData != 0; }
static CXXRecordDecl *Create(const ASTContext &C, TagKind TK, DeclContext *DC,
SourceLocation StartLoc, SourceLocation IdLoc,
IdentifierInfo *Id, CXXRecordDecl* PrevDecl=0,
bool DelayTypeCreation = false);
static CXXRecordDecl *CreateLambda(const ASTContext &C, DeclContext *DC,
SourceLocation Loc, bool DependentLambda);
static CXXRecordDecl *CreateDeserialized(const ASTContext &C, unsigned ID);
bool isDynamicClass() const {
return data().Polymorphic || data().NumVBases != 0;
}
/// setBases - Sets the base classes of this struct or class.
void setBases(CXXBaseSpecifier const * const *Bases, unsigned NumBases);
/// getNumBases - Retrieves the number of base classes of this
/// class.
unsigned getNumBases() const { return data().NumBases; }
base_class_iterator bases_begin() { return data().getBases(); }
base_class_const_iterator bases_begin() const { return data().getBases(); }
base_class_iterator bases_end() { return bases_begin() + data().NumBases; }
base_class_const_iterator bases_end() const {
return bases_begin() + data().NumBases;
}
reverse_base_class_iterator bases_rbegin() {
return reverse_base_class_iterator(bases_end());
}
reverse_base_class_const_iterator bases_rbegin() const {
return reverse_base_class_const_iterator(bases_end());
}
reverse_base_class_iterator bases_rend() {
return reverse_base_class_iterator(bases_begin());
}
reverse_base_class_const_iterator bases_rend() const {
return reverse_base_class_const_iterator(bases_begin());
}
/// getNumVBases - Retrieves the number of virtual base classes of this
/// class.
unsigned getNumVBases() const { return data().NumVBases; }
base_class_iterator vbases_begin() { return data().getVBases(); }
base_class_const_iterator vbases_begin() const { return data().getVBases(); }
base_class_iterator vbases_end() { return vbases_begin() + data().NumVBases; }
base_class_const_iterator vbases_end() const {
return vbases_begin() + data().NumVBases;
}
reverse_base_class_iterator vbases_rbegin() {
return reverse_base_class_iterator(vbases_end());
}
reverse_base_class_const_iterator vbases_rbegin() const {
return reverse_base_class_const_iterator(vbases_end());
}
reverse_base_class_iterator vbases_rend() {
return reverse_base_class_iterator(vbases_begin());
}
reverse_base_class_const_iterator vbases_rend() const {
return reverse_base_class_const_iterator(vbases_begin());
}
/// \brief Determine whether this class has any dependent base classes.
bool hasAnyDependentBases() const;
/// Iterator access to method members. The method iterator visits
/// all method members of the class, including non-instance methods,
/// special methods, etc.
typedef specific_decl_iterator<CXXMethodDecl> method_iterator;
/// method_begin - Method begin iterator. Iterates in the order the methods
/// were declared.
method_iterator method_begin() const {
return method_iterator(decls_begin());
}
/// method_end - Method end iterator.
method_iterator method_end() const {
return method_iterator(decls_end());
}
/// Iterator access to constructor members.
typedef specific_decl_iterator<CXXConstructorDecl> ctor_iterator;
ctor_iterator ctor_begin() const {
return ctor_iterator(decls_begin());
}
ctor_iterator ctor_end() const {
return ctor_iterator(decls_end());
}
/// An iterator over friend declarations. All of these are defined
/// in DeclFriend.h.
class friend_iterator;
friend_iterator friend_begin() const;
friend_iterator friend_end() const;
void pushFriendDecl(FriendDecl *FD);
/// Determines whether this record has any friends.
bool hasFriends() const {
return data().FirstFriend != 0;
}
/// \brief Determine if we need to declare a default constructor for
/// this class.
///
/// This value is used for lazy creation of default constructors.
bool needsImplicitDefaultConstructor() const {
return !data().UserDeclaredConstructor &&
!data().DeclaredDefaultConstructor;
}
/// hasDeclaredDefaultConstructor - Whether this class's default constructor
/// has been declared (either explicitly or implicitly).
bool hasDeclaredDefaultConstructor() const {
return data().DeclaredDefaultConstructor;
}
/// hasConstCopyConstructor - Determines whether this class has a
/// copy constructor that accepts a const-qualified argument.
bool hasConstCopyConstructor() const;
/// getCopyConstructor - Returns the copy constructor for this class
CXXConstructorDecl *getCopyConstructor(unsigned TypeQuals) const;
/// getMoveConstructor - Returns the move constructor for this class
CXXConstructorDecl *getMoveConstructor() const;
/// \brief Retrieve the copy-assignment operator for this class, if available.
///
/// This routine attempts to find the copy-assignment operator for this
/// class, using a simplistic form of overload resolution.
///
/// \param ArgIsConst Whether the argument to the copy-assignment operator
/// is const-qualified.
///
/// \returns The copy-assignment operator that can be invoked, or NULL if
/// a unique copy-assignment operator could not be found.
CXXMethodDecl *getCopyAssignmentOperator(bool ArgIsConst) const;
/// getMoveAssignmentOperator - Returns the move assignment operator for this
/// class
CXXMethodDecl *getMoveAssignmentOperator() const;
/// hasUserDeclaredConstructor - Whether this class has any
/// user-declared constructors. When true, a default constructor
/// will not be implicitly declared.
bool hasUserDeclaredConstructor() const {
return data().UserDeclaredConstructor;
}
/// hasUserProvidedDefaultconstructor - Whether this class has a
/// user-provided default constructor per C++0x.
bool hasUserProvidedDefaultConstructor() const {
return data().UserProvidedDefaultConstructor;
}
/// hasUserDeclaredCopyConstructor - Whether this class has a
/// user-declared copy constructor. When false, a copy constructor
/// will be implicitly declared.
bool hasUserDeclaredCopyConstructor() const {
return data().UserDeclaredCopyConstructor;
}
/// \brief Determine whether this class has had its copy constructor
/// declared, either via the user or via an implicit declaration.
///
/// This value is used for lazy creation of copy constructors.
bool hasDeclaredCopyConstructor() const {
return data().DeclaredCopyConstructor;
}
/// hasUserDeclaredMoveOperation - Whether this class has a user-
/// declared move constructor or assignment operator. When false, a
/// move constructor and assignment operator may be implicitly declared.
bool hasUserDeclaredMoveOperation() const {
return data().UserDeclaredMoveConstructor ||
data().UserDeclaredMoveAssignment;
}
/// \brief Determine whether this class has had a move constructor
/// declared by the user.
bool hasUserDeclaredMoveConstructor() const {
return data().UserDeclaredMoveConstructor;
}
/// \brief Determine whether this class has had a move constructor
/// declared.
bool hasDeclaredMoveConstructor() const {
return data().DeclaredMoveConstructor;
}
/// \brief Determine whether implicit move constructor generation for this
/// class has failed before.
bool hasFailedImplicitMoveConstructor() const {
return data().FailedImplicitMoveConstructor;
}
/// \brief Set whether implicit move constructor generation for this class
/// has failed before.
void setFailedImplicitMoveConstructor(bool Failed = true) {
data().FailedImplicitMoveConstructor = Failed;
}
/// \brief Determine whether this class should get an implicit move
/// constructor or if any existing special member function inhibits this.
///
/// Covers all bullets of C++0x [class.copy]p9 except the last, that the
/// constructor wouldn't be deleted, which is only looked up from a cached
/// result.
bool needsImplicitMoveConstructor() const {
return !hasFailedImplicitMoveConstructor() &&
!hasDeclaredMoveConstructor() &&
!hasUserDeclaredCopyConstructor() &&
!hasUserDeclaredCopyAssignment() &&
!hasUserDeclaredMoveAssignment() &&
!hasUserDeclaredDestructor();
}
/// hasUserDeclaredCopyAssignment - Whether this class has a
/// user-declared copy assignment operator. When false, a copy
/// assigment operator will be implicitly declared.
bool hasUserDeclaredCopyAssignment() const {
return data().UserDeclaredCopyAssignment;
}
/// \brief Determine whether this class has had its copy assignment operator
/// declared, either via the user or via an implicit declaration.
///
/// This value is used for lazy creation of copy assignment operators.
bool hasDeclaredCopyAssignment() const {
return data().DeclaredCopyAssignment;
}
/// \brief Determine whether this class has had a move assignment
/// declared by the user.
bool hasUserDeclaredMoveAssignment() const {
return data().UserDeclaredMoveAssignment;
}
/// hasDeclaredMoveAssignment - Whether this class has a
/// declared move assignment operator.
bool hasDeclaredMoveAssignment() const {
return data().DeclaredMoveAssignment;
}
/// \brief Determine whether implicit move assignment generation for this
/// class has failed before.
bool hasFailedImplicitMoveAssignment() const {
return data().FailedImplicitMoveAssignment;
}
/// \brief Set whether implicit move assignment generation for this class
/// has failed before.
void setFailedImplicitMoveAssignment(bool Failed = true) {
data().FailedImplicitMoveAssignment = Failed;
}
/// \brief Determine whether this class should get an implicit move
/// assignment operator or if any existing special member function inhibits
/// this.
///
/// Covers all bullets of C++0x [class.copy]p20 except the last, that the
/// constructor wouldn't be deleted.
bool needsImplicitMoveAssignment() const {
return !hasFailedImplicitMoveAssignment() &&
!hasDeclaredMoveAssignment() &&
!hasUserDeclaredCopyConstructor() &&
!hasUserDeclaredCopyAssignment() &&
!hasUserDeclaredMoveConstructor() &&
!hasUserDeclaredDestructor();
}
/// hasUserDeclaredDestructor - Whether this class has a
/// user-declared destructor. When false, a destructor will be
/// implicitly declared.
bool hasUserDeclaredDestructor() const {
return data().UserDeclaredDestructor;
}
/// \brief Determine whether this class has had its destructor declared,
/// either via the user or via an implicit declaration.
///
/// This value is used for lazy creation of destructors.
bool hasDeclaredDestructor() const { return data().DeclaredDestructor; }
/// \brief Determine whether this class describes a lambda function object.
bool isLambda() const { return hasDefinition() && data().IsLambda; }
/// \brief For a closure type, retrieve the mapping from captured
/// variables and this to the non-static data members that store the
/// values or references of the captures.
///
/// \param Captures Will be populated with the mapping from captured
/// variables to the corresponding fields.
///
/// \param ThisCapture Will be set to the field declaration for the
/// 'this' capture.
void getCaptureFields(llvm::DenseMap<const VarDecl *, FieldDecl *> &Captures,
FieldDecl *&ThisCapture) const;
typedef const LambdaExpr::Capture* capture_const_iterator;
capture_const_iterator captures_begin() const {
return isLambda() ? getLambdaData().Captures : NULL;
}
capture_const_iterator captures_end() const {
return isLambda() ? captures_begin() + getLambdaData().NumCaptures : NULL;
}
/// getConversions - Retrieve the overload set containing all of the
/// conversion functions in this class.
UnresolvedSetImpl *getConversionFunctions() {
return &data().Conversions;
}
const UnresolvedSetImpl *getConversionFunctions() const {
return &data().Conversions;
}
typedef UnresolvedSetImpl::iterator conversion_iterator;
conversion_iterator conversion_begin() const {
return getConversionFunctions()->begin();
}
conversion_iterator conversion_end() const {
return getConversionFunctions()->end();
}
/// Removes a conversion function from this class. The conversion
/// function must currently be a member of this class. Furthermore,
/// this class must currently be in the process of being defined.
void removeConversion(const NamedDecl *Old);
/// getVisibleConversionFunctions - get all conversion functions visible
/// in current class; including conversion function templates.
const UnresolvedSetImpl *getVisibleConversionFunctions();
/// isAggregate - Whether this class is an aggregate (C++
/// [dcl.init.aggr]), which is a class with no user-declared
/// constructors, no private or protected non-static data members,
/// no base classes, and no virtual functions (C++ [dcl.init.aggr]p1).
bool isAggregate() const { return data().Aggregate; }
/// hasInClassInitializer - Whether this class has any in-class initializers
/// for non-static data members.
bool hasInClassInitializer() const { return data().HasInClassInitializer; }
/// isPOD - Whether this class is a POD-type (C++ [class]p4), which is a class
/// that is an aggregate that has no non-static non-POD data members, no
/// reference data members, no user-defined copy assignment operator and no
/// user-defined destructor.
bool isPOD() const { return data().PlainOldData; }
/// \brief True if this class is C-like, without C++-specific features, e.g.
/// it contains only public fields, no bases, tag kind is not 'class', etc.
bool isCLike() const;
/// isEmpty - Whether this class is empty (C++0x [meta.unary.prop]), which
/// means it has a virtual function, virtual base, data member (other than
/// 0-width bit-field) or inherits from a non-empty class. Does NOT include
/// a check for union-ness.
bool isEmpty() const { return data().Empty; }
/// isPolymorphic - Whether this class is polymorphic (C++ [class.virtual]),
/// which means that the class contains or inherits a virtual function.
bool isPolymorphic() const { return data().Polymorphic; }
/// isAbstract - Whether this class is abstract (C++ [class.abstract]),
/// which means that the class contains or inherits a pure virtual function.
bool isAbstract() const { return data().Abstract; }
/// isStandardLayout - Whether this class has standard layout
/// (C++ [class]p7)
bool isStandardLayout() const { return data().IsStandardLayout; }
/// \brief Whether this class, or any of its class subobjects, contains a
/// mutable field.
bool hasMutableFields() const { return data().HasMutableFields; }
/// hasTrivialDefaultConstructor - Whether this class has a trivial default
/// constructor (C++11 [class.ctor]p5).
bool hasTrivialDefaultConstructor() const {
return data().HasTrivialDefaultConstructor &&
(!data().UserDeclaredConstructor ||
data().DeclaredDefaultConstructor);
}
/// hasConstexprNonCopyMoveConstructor - Whether this class has at least one
/// constexpr constructor other than the copy or move constructors.
bool hasConstexprNonCopyMoveConstructor() const {
return data().HasConstexprNonCopyMoveConstructor ||
(!hasUserDeclaredConstructor() &&
defaultedDefaultConstructorIsConstexpr());
}
/// defaultedDefaultConstructorIsConstexpr - Whether a defaulted default
/// constructor for this class would be constexpr.
bool defaultedDefaultConstructorIsConstexpr() const {
return data().DefaultedDefaultConstructorIsConstexpr &&
(!isUnion() || hasInClassInitializer());
}
/// hasConstexprDefaultConstructor - Whether this class has a constexpr
/// default constructor.
bool hasConstexprDefaultConstructor() const {
return data().HasConstexprDefaultConstructor ||
(!data().UserDeclaredConstructor &&
defaultedDefaultConstructorIsConstexpr());
}
// hasTrivialCopyConstructor - Whether this class has a trivial copy
// constructor (C++ [class.copy]p6, C++0x [class.copy]p13)
bool hasTrivialCopyConstructor() const {
return data().HasTrivialCopyConstructor;
}
// hasTrivialMoveConstructor - Whether this class has a trivial move
// constructor (C++0x [class.copy]p13)
bool hasTrivialMoveConstructor() const {
return data().HasTrivialMoveConstructor;
}
// hasTrivialCopyAssignment - Whether this class has a trivial copy
// assignment operator (C++ [class.copy]p11, C++0x [class.copy]p27)
bool hasTrivialCopyAssignment() const {
return data().HasTrivialCopyAssignment;
}
// hasTrivialMoveAssignment - Whether this class has a trivial move
// assignment operator (C++0x [class.copy]p27)
bool hasTrivialMoveAssignment() const {
return data().HasTrivialMoveAssignment;
}
// hasTrivialDestructor - Whether this class has a trivial destructor
// (C++ [class.dtor]p3)
bool hasTrivialDestructor() const { return data().HasTrivialDestructor; }
// hasIrrelevantDestructor - Whether this class has a destructor which has no
// semantic effect. Any such destructor will be trivial, public, defaulted
// and not deleted, and will call only irrelevant destructors.
bool hasIrrelevantDestructor() const {
return data().HasIrrelevantDestructor;
}
// hasNonLiteralTypeFieldsOrBases - Whether this class has a non-literal or
// volatile type non-static data member or base class.
bool hasNonLiteralTypeFieldsOrBases() const {
return data().HasNonLiteralTypeFieldsOrBases;
}
// isTriviallyCopyable - Whether this class is considered trivially copyable
// (C++0x [class]p6).
bool isTriviallyCopyable() const;
// isTrivial - Whether this class is considered trivial
//
// C++0x [class]p6
// A trivial class is a class that has a trivial default constructor and
// is trivially copiable.
bool isTrivial() const {
return isTriviallyCopyable() && hasTrivialDefaultConstructor();
}
// isLiteral - Whether this class is a literal type.
//
// C++11 [basic.types]p10
// A class type that has all the following properties:
// -- it has a trivial destructor
// -- every constructor call and full-expression in the
// brace-or-equal-intializers for non-static data members (if any) is
// a constant expression.
// -- it is an aggregate type or has at least one constexpr constructor or
// constructor template that is not a copy or move constructor, and
// -- all of its non-static data members and base classes are of literal
// types
//
// We resolve DR1361 by ignoring the second bullet. We resolve DR1452 by
// treating types with trivial default constructors as literal types.
bool isLiteral() const {
return hasTrivialDestructor() &&
(isAggregate() || hasConstexprNonCopyMoveConstructor() ||
hasTrivialDefaultConstructor()) &&
!hasNonLiteralTypeFieldsOrBases();
}
/// \brief If this record is an instantiation of a member class,
/// retrieves the member class from which it was instantiated.
///
/// This routine will return non-NULL for (non-templated) member
/// classes of class templates. For example, given:
///
/// @code
/// template<typename T>
/// struct X {
/// struct A { };
/// };
/// @endcode
///
/// The declaration for X<int>::A is a (non-templated) CXXRecordDecl
/// whose parent is the class template specialization X<int>. For
/// this declaration, getInstantiatedFromMemberClass() will return
/// the CXXRecordDecl X<T>::A. When a complete definition of
/// X<int>::A is required, it will be instantiated from the
/// declaration returned by getInstantiatedFromMemberClass().
CXXRecordDecl *getInstantiatedFromMemberClass() const;
/// \brief If this class is an instantiation of a member class of a
/// class template specialization, retrieves the member specialization
/// information.
MemberSpecializationInfo *getMemberSpecializationInfo() const;
/// \brief Specify that this record is an instantiation of the
/// member class RD.
void setInstantiationOfMemberClass(CXXRecordDecl *RD,
TemplateSpecializationKind TSK);
/// \brief Retrieves the class template that is described by this
/// class declaration.
///
/// Every class template is represented as a ClassTemplateDecl and a
/// CXXRecordDecl. The former contains template properties (such as
/// the template parameter lists) while the latter contains the
/// actual description of the template's
/// contents. ClassTemplateDecl::getTemplatedDecl() retrieves the
/// CXXRecordDecl that from a ClassTemplateDecl, while
/// getDescribedClassTemplate() retrieves the ClassTemplateDecl from
/// a CXXRecordDecl.
ClassTemplateDecl *getDescribedClassTemplate() const {
return TemplateOrInstantiation.dyn_cast<ClassTemplateDecl*>();
}
void setDescribedClassTemplate(ClassTemplateDecl *Template) {
TemplateOrInstantiation = Template;
}
/// \brief Determine whether this particular class is a specialization or
/// instantiation of a class template or member class of a class template,
/// and how it was instantiated or specialized.
TemplateSpecializationKind getTemplateSpecializationKind() const;
/// \brief Set the kind of specialization or template instantiation this is.
void setTemplateSpecializationKind(TemplateSpecializationKind TSK);
/// getDestructor - Returns the destructor decl for this class.
CXXDestructorDecl *getDestructor() const;
/// isLocalClass - If the class is a local class [class.local], returns
/// the enclosing function declaration.
const FunctionDecl *isLocalClass() const {
if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(getDeclContext()))
return RD->isLocalClass();
return dyn_cast<FunctionDecl>(getDeclContext());
}
/// \brief Determine whether this class is derived from the class \p Base.
///
/// This routine only determines whether this class is derived from \p Base,
/// but does not account for factors that may make a Derived -> Base class
/// ill-formed, such as private/protected inheritance or multiple, ambiguous
/// base class subobjects.
///
/// \param Base the base class we are searching for.
///
/// \returns true if this class is derived from Base, false otherwise.
bool isDerivedFrom(const CXXRecordDecl *Base) const;
/// \brief Determine whether this class is derived from the type \p Base.
///
/// This routine only determines whether this class is derived from \p Base,
/// but does not account for factors that may make a Derived -> Base class
/// ill-formed, such as private/protected inheritance or multiple, ambiguous
/// base class subobjects.
///
/// \param Base the base class we are searching for.
///
/// \param Paths will contain the paths taken from the current class to the
/// given \p Base class.
///
/// \returns true if this class is derived from Base, false otherwise.
///
/// \todo add a separate paramaeter to configure IsDerivedFrom, rather than
/// tangling input and output in \p Paths
bool isDerivedFrom(const CXXRecordDecl *Base, CXXBasePaths &Paths) const;
/// \brief Determine whether this class is virtually derived from
/// the class \p Base.
///
/// This routine only determines whether this class is virtually
/// derived from \p Base, but does not account for factors that may
/// make a Derived -> Base class ill-formed, such as
/// private/protected inheritance or multiple, ambiguous base class
/// subobjects.
///
/// \param Base the base class we are searching for.
///
/// \returns true if this class is virtually derived from Base,
/// false otherwise.
bool isVirtuallyDerivedFrom(const CXXRecordDecl *Base) const;
/// \brief Determine whether this class is provably not derived from
/// the type \p Base.
bool isProvablyNotDerivedFrom(const CXXRecordDecl *Base) const;
/// \brief Function type used by forallBases() as a callback.
///
/// \param BaseDefinition the definition of the base class
///
/// \returns true if this base matched the search criteria
typedef bool ForallBasesCallback(const CXXRecordDecl *BaseDefinition,
void *UserData);
/// \brief Determines if the given callback holds for all the direct
/// or indirect base classes of this type.
///
/// The class itself does not count as a base class. This routine
/// returns false if the class has non-computable base classes.
///
/// \param AllowShortCircuit if false, forces the callback to be called
/// for every base class, even if a dependent or non-matching base was
/// found.
bool forallBases(ForallBasesCallback *BaseMatches, void *UserData,
bool AllowShortCircuit = true) const;
/// \brief Function type used by lookupInBases() to determine whether a
/// specific base class subobject matches the lookup criteria.
///
/// \param Specifier the base-class specifier that describes the inheritance
/// from the base class we are trying to match.
///
/// \param Path the current path, from the most-derived class down to the
/// base named by the \p Specifier.
///
/// \param UserData a single pointer to user-specified data, provided to
/// lookupInBases().
///
/// \returns true if this base matched the search criteria, false otherwise.
typedef bool BaseMatchesCallback(const CXXBaseSpecifier *Specifier,
CXXBasePath &Path,
void *UserData);
/// \brief Look for entities within the base classes of this C++ class,
/// transitively searching all base class subobjects.
///
/// This routine uses the callback function \p BaseMatches to find base
/// classes meeting some search criteria, walking all base class subobjects
/// and populating the given \p Paths structure with the paths through the
/// inheritance hierarchy that resulted in a match. On a successful search,
/// the \p Paths structure can be queried to retrieve the matching paths and
/// to determine if there were any ambiguities.
///
/// \param BaseMatches callback function used to determine whether a given
/// base matches the user-defined search criteria.
///
/// \param UserData user data pointer that will be provided to \p BaseMatches.
///
/// \param Paths used to record the paths from this class to its base class
/// subobjects that match the search criteria.
///
/// \returns true if there exists any path from this class to a base class
/// subobject that matches the search criteria.
bool lookupInBases(BaseMatchesCallback *BaseMatches, void *UserData,
CXXBasePaths &Paths) const;
/// \brief Base-class lookup callback that determines whether the given
/// base class specifier refers to a specific class declaration.
///
/// This callback can be used with \c lookupInBases() to determine whether
/// a given derived class has is a base class subobject of a particular type.
/// The user data pointer should refer to the canonical CXXRecordDecl of the
/// base class that we are searching for.
static bool FindBaseClass(const CXXBaseSpecifier *Specifier,
CXXBasePath &Path, void *BaseRecord);
/// \brief Base-class lookup callback that determines whether the
/// given base class specifier refers to a specific class
/// declaration and describes virtual derivation.
///
/// This callback can be used with \c lookupInBases() to determine
/// whether a given derived class has is a virtual base class
/// subobject of a particular type. The user data pointer should
/// refer to the canonical CXXRecordDecl of the base class that we
/// are searching for.
static bool FindVirtualBaseClass(const CXXBaseSpecifier *Specifier,
CXXBasePath &Path, void *BaseRecord);
/// \brief Base-class lookup callback that determines whether there exists
/// a tag with the given name.
///
/// This callback can be used with \c lookupInBases() to find tag members
/// of the given name within a C++ class hierarchy. The user data pointer
/// is an opaque \c DeclarationName pointer.
static bool FindTagMember(const CXXBaseSpecifier *Specifier,
CXXBasePath &Path, void *Name);
/// \brief Base-class lookup callback that determines whether there exists
/// a member with the given name.
///
/// This callback can be used with \c lookupInBases() to find members
/// of the given name within a C++ class hierarchy. The user data pointer
/// is an opaque \c DeclarationName pointer.
static bool FindOrdinaryMember(const CXXBaseSpecifier *Specifier,
CXXBasePath &Path, void *Name);
/// \brief Base-class lookup callback that determines whether there exists
/// a member with the given name that can be used in a nested-name-specifier.
///
/// This callback can be used with \c lookupInBases() to find membes of
/// the given name within a C++ class hierarchy that can occur within
/// nested-name-specifiers.
static bool FindNestedNameSpecifierMember(const CXXBaseSpecifier *Specifier,
CXXBasePath &Path,
void *UserData);
/// \brief Retrieve the final overriders for each virtual member
/// function in the class hierarchy where this class is the
/// most-derived class in the class hierarchy.
void getFinalOverriders(CXXFinalOverriderMap &FinaOverriders) const;
/// \brief Get the indirect primary bases for this class.
void getIndirectPrimaryBases(CXXIndirectPrimaryBaseSet& Bases) const;
/// viewInheritance - Renders and displays an inheritance diagram
/// for this C++ class and all of its base classes (transitively) using
/// GraphViz.
void viewInheritance(ASTContext& Context) const;
/// MergeAccess - Calculates the access of a decl that is reached
/// along a path.
static AccessSpecifier MergeAccess(AccessSpecifier PathAccess,
AccessSpecifier DeclAccess) {
assert(DeclAccess != AS_none);
if (DeclAccess == AS_private) return AS_none;
return (PathAccess > DeclAccess ? PathAccess : DeclAccess);
}
/// \brief Indicates that the definition of this class is now complete.
virtual void completeDefinition();
/// \brief Indicates that the definition of this class is now complete,
/// and provides a final overrider map to help determine
///
/// \param FinalOverriders The final overrider map for this class, which can
/// be provided as an optimization for abstract-class checking. If NULL,
/// final overriders will be computed if they are needed to complete the
/// definition.
void completeDefinition(CXXFinalOverriderMap *FinalOverriders);
/// \brief Determine whether this class may end up being abstract, even though
/// it is not yet known to be abstract.
///
/// \returns true if this class is not known to be abstract but has any
/// base classes that are abstract. In this case, \c completeDefinition()
/// will need to compute final overriders to determine whether the class is
/// actually abstract.
bool mayBeAbstract() const;
/// \brief If this is the closure type of a lambda expression, retrieve the
/// number to be used for name mangling in the Itanium C++ ABI.
///
/// Zero indicates that this closure type has internal linkage, so the
/// mangling number does not matter, while a non-zero value indicates which
/// lambda expression this is in this particular context.
unsigned getLambdaManglingNumber() const {
assert(isLambda() && "Not a lambda closure type!");
return getLambdaData().ManglingNumber;
}
/// \brief Retrieve the declaration that provides additional context for a
/// lambda, when the normal declaration context is not specific enough.
///
/// Certain contexts (default arguments of in-class function parameters and
/// the initializers of data members) have separate name mangling rules for
/// lambdas within the Itanium C++ ABI. For these cases, this routine provides
/// the declaration in which the lambda occurs, e.g., the function parameter
/// or the non-static data member. Otherwise, it returns NULL to imply that
/// the declaration context suffices.
Decl *getLambdaContextDecl() const {
assert(isLambda() && "Not a lambda closure type!");
return getLambdaData().ContextDecl;
}
/// \brief Set the mangling number and context declaration for a lambda
/// class.
void setLambdaMangling(unsigned ManglingNumber, Decl *ContextDecl) {
getLambdaData().ManglingNumber = ManglingNumber;
getLambdaData().ContextDecl = ContextDecl;
}
/// \brief Determine whether this lambda expression was known to be dependent
/// at the time it was created, even if its context does not appear to be
/// dependent.
///
/// This flag is a workaround for an issue with parsing, where default
/// arguments are parsed before their enclosing function declarations have
/// been created. This means that any lambda expressions within those
/// default arguments will have as their DeclContext the context enclosing
/// the function declaration, which may be non-dependent even when the
/// function declaration itself is dependent. This flag indicates when we
/// know that the lambda is dependent despite that.
bool isDependentLambda() const {
return isLambda() && getLambdaData().Dependent;
}
static bool classof(const Decl *D) { return classofKind(D->getKind()); }
static bool classofKind(Kind K) {
return K >= firstCXXRecord && K <= lastCXXRecord;
}
static bool classof(const CXXRecordDecl *D) { return true; }
static bool classof(const ClassTemplateSpecializationDecl *D) {
return true;
}
friend class ASTDeclReader;
friend class ASTDeclWriter;
friend class ASTReader;
friend class ASTWriter;
};
/// CXXMethodDecl - Represents a static or instance method of a
/// struct/union/class.
class CXXMethodDecl : public FunctionDecl {
virtual void anchor();
protected:
CXXMethodDecl(Kind DK, CXXRecordDecl *RD, SourceLocation StartLoc,
const DeclarationNameInfo &NameInfo,
QualType T, TypeSourceInfo *TInfo,
bool isStatic, StorageClass SCAsWritten, bool isInline,
bool isConstexpr, SourceLocation EndLocation)
: FunctionDecl(DK, RD, StartLoc, NameInfo, T, TInfo,
(isStatic ? SC_Static : SC_None),
SCAsWritten, isInline, isConstexpr) {
if (EndLocation.isValid())
setRangeEnd(EndLocation);
}
public:
static CXXMethodDecl *Create(ASTContext &C, CXXRecordDecl *RD,
SourceLocation StartLoc,
const DeclarationNameInfo &NameInfo,
QualType T, TypeSourceInfo *TInfo,
bool isStatic,
StorageClass SCAsWritten,
bool isInline,
bool isConstexpr,
SourceLocation EndLocation);
static CXXMethodDecl *CreateDeserialized(ASTContext &C, unsigned ID);
bool isStatic() const { return getStorageClass() == SC_Static; }
bool isInstance() const { return !isStatic(); }
bool isConst() { return getType()->castAs<FunctionType>()->isConst(); }
bool isVolatile() { return getType()->castAs<FunctionType>()->isVolatile(); }
bool isVirtual() const {
CXXMethodDecl *CD =
cast<CXXMethodDecl>(const_cast<CXXMethodDecl*>(this)->getCanonicalDecl());
if (CD->isVirtualAsWritten())
return true;
return (CD->begin_overridden_methods() != CD->end_overridden_methods());
}
/// \brief Determine whether this is a usual deallocation function
/// (C++ [basic.stc.dynamic.deallocation]p2), which is an overloaded
/// delete or delete[] operator with a particular signature.
bool isUsualDeallocationFunction() const;
/// \brief Determine whether this is a copy-assignment operator, regardless
/// of whether it was declared implicitly or explicitly.
bool isCopyAssignmentOperator() const;
/// \brief Determine whether this is a move assignment operator.
bool isMoveAssignmentOperator() const;
const CXXMethodDecl *getCanonicalDecl() const {
return cast<CXXMethodDecl>(FunctionDecl::getCanonicalDecl());
}
CXXMethodDecl *getCanonicalDecl() {
return cast<CXXMethodDecl>(FunctionDecl::getCanonicalDecl());
}
/// isUserProvided - True if this method is user-declared and was not
/// deleted or defaulted on its first declaration.
bool isUserProvided() const {
return !(isDeleted() || getCanonicalDecl()->isDefaulted());
}
///
void addOverriddenMethod(const CXXMethodDecl *MD);
typedef const CXXMethodDecl *const* method_iterator;
method_iterator begin_overridden_methods() const;
method_iterator end_overridden_methods() const;
unsigned size_overridden_methods() const;
/// getParent - Returns the parent of this method declaration, which
/// is the class in which this method is defined.
const CXXRecordDecl *getParent() const {
return cast<CXXRecordDecl>(FunctionDecl::getParent());
}
/// getParent - Returns the parent of this method declaration, which
/// is the class in which this method is defined.
CXXRecordDecl *getParent() {
return const_cast<CXXRecordDecl *>(
cast<CXXRecordDecl>(FunctionDecl::getParent()));
}
/// getThisType - Returns the type of 'this' pointer.
/// Should only be called for instance methods.
QualType getThisType(ASTContext &C) const;
unsigned getTypeQualifiers() const {
return getType()->getAs<FunctionProtoType>()->getTypeQuals();
}
/// \brief Retrieve the ref-qualifier associated with this method.
///
/// In the following example, \c f() has an lvalue ref-qualifier, \c g()
/// has an rvalue ref-qualifier, and \c h() has no ref-qualifier.
/// @code
/// struct X {
/// void f() &;
/// void g() &&;
/// void h();
/// };
/// @endcode
RefQualifierKind getRefQualifier() const {
return getType()->getAs<FunctionProtoType>()->getRefQualifier();
}
bool hasInlineBody() const;
/// \brief Determine whether this is a lambda closure type's static member
/// function that is used for the result of the lambda's conversion to
/// function pointer (for a lambda with no captures).
///
/// The function itself, if used, will have a placeholder body that will be
/// supplied by IR generation to either forward to the function call operator
/// or clone the function call operator.
bool isLambdaStaticInvoker() const;
/// \brief Find the method in RD that corresponds to this one.
///
/// Find if RD or one of the classes it inherits from override this method.
/// If so, return it. RD is assumed to be a subclass of the class defining
/// this method (or be the class itself), unless MayBeBase is set to true.
CXXMethodDecl *
getCorrespondingMethodInClass(const CXXRecordDecl *RD,
bool MayBeBase = false);
const CXXMethodDecl *
getCorrespondingMethodInClass(const CXXRecordDecl *RD,
bool MayBeBase = false) const {
return const_cast<CXXMethodDecl *>(this)
->getCorrespondingMethodInClass(RD, MayBeBase);
}
// Implement isa/cast/dyncast/etc.
static bool classof(const Decl *D) { return classofKind(D->getKind()); }
static bool classof(const CXXMethodDecl *D) { return true; }
static bool classofKind(Kind K) {
return K >= firstCXXMethod && K <= lastCXXMethod;
}
};
/// CXXCtorInitializer - Represents a C++ base or member
/// initializer, which is part of a constructor initializer that
/// initializes one non-static member variable or one base class. For
/// example, in the following, both 'A(a)' and 'f(3.14159)' are member
/// initializers:
///
/// @code
/// class A { };
/// class B : public A {
/// float f;
/// public:
/// B(A& a) : A(a), f(3.14159) { }
/// };
/// @endcode
class CXXCtorInitializer {
/// \brief Either the base class name/delegating constructor type (stored as
/// a TypeSourceInfo*), an normal field (FieldDecl), or an anonymous field
/// (IndirectFieldDecl*) being initialized.
llvm::PointerUnion3<TypeSourceInfo *, FieldDecl *, IndirectFieldDecl *>
Initializee;
/// \brief The source location for the field name or, for a base initializer
/// pack expansion, the location of the ellipsis. In the case of a delegating
/// constructor, it will still include the type's source location as the
/// Initializee points to the CXXConstructorDecl (to allow loop detection).
SourceLocation MemberOrEllipsisLocation;
/// \brief The argument used to initialize the base or member, which may
/// end up constructing an object (when multiple arguments are involved).
/// If 0, this is a field initializer, and the in-class member initializer
/// will be used.
Stmt *Init;
/// LParenLoc - Location of the left paren of the ctor-initializer.
SourceLocation LParenLoc;
/// RParenLoc - Location of the right paren of the ctor-initializer.
SourceLocation RParenLoc;
/// \brief If the initializee is a type, whether that type makes this
/// a delegating initialization.
bool IsDelegating : 1;
/// IsVirtual - If the initializer is a base initializer, this keeps track
/// of whether the base is virtual or not.
bool IsVirtual : 1;
/// IsWritten - Whether or not the initializer is explicitly written
/// in the sources.
bool IsWritten : 1;
/// SourceOrderOrNumArrayIndices - If IsWritten is true, then this
/// number keeps track of the textual order of this initializer in the
/// original sources, counting from 0; otherwise, if IsWritten is false,
/// it stores the number of array index variables stored after this
/// object in memory.
unsigned SourceOrderOrNumArrayIndices : 13;
CXXCtorInitializer(ASTContext &Context, FieldDecl *Member,
SourceLocation MemberLoc, SourceLocation L, Expr *Init,
SourceLocation R, VarDecl **Indices, unsigned NumIndices);
public:
/// CXXCtorInitializer - Creates a new base-class initializer.
explicit
CXXCtorInitializer(ASTContext &Context, TypeSourceInfo *TInfo, bool IsVirtual,
SourceLocation L, Expr *Init, SourceLocation R,
SourceLocation EllipsisLoc);
/// CXXCtorInitializer - Creates a new member initializer.
explicit
CXXCtorInitializer(ASTContext &Context, FieldDecl *Member,
SourceLocation MemberLoc, SourceLocation L, Expr *Init,
SourceLocation R);
/// CXXCtorInitializer - Creates a new anonymous field initializer.
explicit
CXXCtorInitializer(ASTContext &Context, IndirectFieldDecl *Member,
SourceLocation MemberLoc, SourceLocation L, Expr *Init,
SourceLocation R);
/// CXXCtorInitializer - Creates a new delegating Initializer.
explicit
CXXCtorInitializer(ASTContext &Context, TypeSourceInfo *TInfo,
SourceLocation L, Expr *Init, SourceLocation R);
/// \brief Creates a new member initializer that optionally contains
/// array indices used to describe an elementwise initialization.
static CXXCtorInitializer *Create(ASTContext &Context, FieldDecl *Member,
SourceLocation MemberLoc, SourceLocation L,
Expr *Init, SourceLocation R,
VarDecl **Indices, unsigned NumIndices);
/// isBaseInitializer - Returns true when this initializer is
/// initializing a base class.
bool isBaseInitializer() const {
return Initializee.is<TypeSourceInfo*>() && !IsDelegating;
}
/// isMemberInitializer - Returns true when this initializer is
/// initializing a non-static data member.
bool isMemberInitializer() const { return Initializee.is<FieldDecl*>(); }
bool isAnyMemberInitializer() const {
return isMemberInitializer() || isIndirectMemberInitializer();
}
bool isIndirectMemberInitializer() const {
return Initializee.is<IndirectFieldDecl*>();
}
/// isInClassMemberInitializer - Returns true when this initializer is an
/// implicit ctor initializer generated for a field with an initializer
/// defined on the member declaration.
bool isInClassMemberInitializer() const {
return !Init;
}
/// isDelegatingInitializer - Returns true when this initializer is creating
/// a delegating constructor.
bool isDelegatingInitializer() const {
return Initializee.is<TypeSourceInfo*>() && IsDelegating;
}
/// \brief Determine whether this initializer is a pack expansion.
bool isPackExpansion() const {
return isBaseInitializer() && MemberOrEllipsisLocation.isValid();
}
// \brief For a pack expansion, returns the location of the ellipsis.
SourceLocation getEllipsisLoc() const {
assert(isPackExpansion() && "Initializer is not a pack expansion");
return MemberOrEllipsisLocation;
}
/// If this is a base class initializer, returns the type of the
/// base class with location information. Otherwise, returns an NULL
/// type location.
TypeLoc getBaseClassLoc() const;
/// If this is a base class initializer, returns the type of the base class.
/// Otherwise, returns NULL.
const Type *getBaseClass() const;
/// Returns whether the base is virtual or not.
bool isBaseVirtual() const {
assert(isBaseInitializer() && "Must call this on base initializer!");
return IsVirtual;
}
/// \brief Returns the declarator information for a base class or delegating
/// initializer.
TypeSourceInfo *getTypeSourceInfo() const {
return Initializee.dyn_cast<TypeSourceInfo *>();
}
/// getMember - If this is a member initializer, returns the
/// declaration of the non-static data member being
/// initialized. Otherwise, returns NULL.
FieldDecl *getMember() const {
if (isMemberInitializer())
return Initializee.get<FieldDecl*>();
return 0;
}
FieldDecl *getAnyMember() const {
if (isMemberInitializer())
return Initializee.get<FieldDecl*>();
if (isIndirectMemberInitializer())
return Initializee.get<IndirectFieldDecl*>()->getAnonField();
return 0;
}
IndirectFieldDecl *getIndirectMember() const {
if (isIndirectMemberInitializer())
return Initializee.get<IndirectFieldDecl*>();
return 0;
}
SourceLocation getMemberLocation() const {
return MemberOrEllipsisLocation;
}
/// \brief Determine the source location of the initializer.
SourceLocation getSourceLocation() const;
/// \brief Determine the source range covering the entire initializer.
SourceRange getSourceRange() const LLVM_READONLY;
/// isWritten - Returns true if this initializer is explicitly written
/// in the source code.
bool isWritten() const { return IsWritten; }
/// \brief Return the source position of the initializer, counting from 0.
/// If the initializer was implicit, -1 is returned.
int getSourceOrder() const {
return IsWritten ? static_cast<int>(SourceOrderOrNumArrayIndices) : -1;
}
/// \brief Set the source order of this initializer. This method can only
/// be called once for each initializer; it cannot be called on an
/// initializer having a positive number of (implicit) array indices.
void setSourceOrder(int pos) {
assert(!IsWritten &&
"calling twice setSourceOrder() on the same initializer");
assert(SourceOrderOrNumArrayIndices == 0 &&
"setSourceOrder() used when there are implicit array indices");
assert(pos >= 0 &&
"setSourceOrder() used to make an initializer implicit");
IsWritten = true;
SourceOrderOrNumArrayIndices = static_cast<unsigned>(pos);
}
SourceLocation getLParenLoc() const { return LParenLoc; }
SourceLocation getRParenLoc() const { return RParenLoc; }
/// \brief Determine the number of implicit array indices used while
/// described an array member initialization.
unsigned getNumArrayIndices() const {
return IsWritten ? 0 : SourceOrderOrNumArrayIndices;
}
/// \brief Retrieve a particular array index variable used to
/// describe an array member initialization.
VarDecl *getArrayIndex(unsigned I) {
assert(I < getNumArrayIndices() && "Out of bounds member array index");
return reinterpret_cast<VarDecl **>(this + 1)[I];
}
const VarDecl *getArrayIndex(unsigned I) const {
assert(I < getNumArrayIndices() && "Out of bounds member array index");
return reinterpret_cast<const VarDecl * const *>(this + 1)[I];
}
void setArrayIndex(unsigned I, VarDecl *Index) {
assert(I < getNumArrayIndices() && "Out of bounds member array index");
reinterpret_cast<VarDecl **>(this + 1)[I] = Index;
}
ArrayRef<VarDecl *> getArrayIndexes() {
assert(getNumArrayIndices() != 0 && "Getting indexes for non-array init");
return ArrayRef<VarDecl *>(reinterpret_cast<VarDecl **>(this + 1),
getNumArrayIndices());
}
/// \brief Get the initializer. This is 0 if this is an in-class initializer
/// for a non-static data member which has not yet been parsed.
Expr *getInit() const {
if (!Init)
return getAnyMember()->getInClassInitializer();
return static_cast<Expr*>(Init);
}
};
/// CXXConstructorDecl - Represents a C++ constructor within a
/// class. For example:
///
/// @code
/// class X {
/// public:
/// explicit X(int); // represented by a CXXConstructorDecl.
/// };
/// @endcode
class CXXConstructorDecl : public CXXMethodDecl {
virtual void anchor();
/// IsExplicitSpecified - Whether this constructor declaration has the
/// 'explicit' keyword specified.
bool IsExplicitSpecified : 1;
/// ImplicitlyDefined - Whether this constructor was implicitly
/// defined by the compiler. When false, the constructor was defined
/// by the user. In C++03, this flag will have the same value as
/// Implicit. In C++0x, however, a constructor that is
/// explicitly defaulted (i.e., defined with " = default") will have
/// @c !Implicit && ImplicitlyDefined.
bool ImplicitlyDefined : 1;
/// Support for base and member initializers.
/// CtorInitializers - The arguments used to initialize the base
/// or member.
CXXCtorInitializer **CtorInitializers;
unsigned NumCtorInitializers;
CXXConstructorDecl(CXXRecordDecl *RD, SourceLocation StartLoc,
const DeclarationNameInfo &NameInfo,
QualType T, TypeSourceInfo *TInfo,
bool isExplicitSpecified, bool isInline,
bool isImplicitlyDeclared, bool isConstexpr)
: CXXMethodDecl(CXXConstructor, RD, StartLoc, NameInfo, T, TInfo, false,
SC_None, isInline, isConstexpr, SourceLocation()),
IsExplicitSpecified(isExplicitSpecified), ImplicitlyDefined(false),
CtorInitializers(0), NumCtorInitializers(0) {
setImplicit(isImplicitlyDeclared);
}
public:
static CXXConstructorDecl *CreateDeserialized(ASTContext &C, unsigned ID);
static CXXConstructorDecl *Create(ASTContext &C, CXXRecordDecl *RD,
SourceLocation StartLoc,
const DeclarationNameInfo &NameInfo,
QualType T, TypeSourceInfo *TInfo,
bool isExplicit,
bool isInline, bool isImplicitlyDeclared,
bool isConstexpr);
/// isExplicitSpecified - Whether this constructor declaration has the
/// 'explicit' keyword specified.
bool isExplicitSpecified() const { return IsExplicitSpecified; }
/// isExplicit - Whether this constructor was marked "explicit" or not.
bool isExplicit() const {
return cast<CXXConstructorDecl>(getFirstDeclaration())
->isExplicitSpecified();
}
/// isImplicitlyDefined - Whether this constructor was implicitly
/// defined. If false, then this constructor was defined by the
/// user. This operation can only be invoked if the constructor has
/// already been defined.
bool isImplicitlyDefined() const {
assert(isThisDeclarationADefinition() &&
"Can only get the implicit-definition flag once the "
"constructor has been defined");
return ImplicitlyDefined;
}
/// setImplicitlyDefined - Set whether this constructor was
/// implicitly defined or not.
void setImplicitlyDefined(bool ID) {
assert(isThisDeclarationADefinition() &&
"Can only set the implicit-definition flag once the constructor "
"has been defined");
ImplicitlyDefined = ID;
}
/// init_iterator - Iterates through the member/base initializer list.
typedef CXXCtorInitializer **init_iterator;
/// init_const_iterator - Iterates through the memberbase initializer list.
typedef CXXCtorInitializer * const * init_const_iterator;
/// init_begin() - Retrieve an iterator to the first initializer.
init_iterator init_begin() { return CtorInitializers; }
/// begin() - Retrieve an iterator to the first initializer.
init_const_iterator init_begin() const { return CtorInitializers; }
/// init_end() - Retrieve an iterator past the last initializer.
init_iterator init_end() {
return CtorInitializers + NumCtorInitializers;
}
/// end() - Retrieve an iterator past the last initializer.
init_const_iterator init_end() const {
return CtorInitializers + NumCtorInitializers;
}
typedef std::reverse_iterator<init_iterator> init_reverse_iterator;
typedef std::reverse_iterator<init_const_iterator>
init_const_reverse_iterator;
init_reverse_iterator init_rbegin() {
return init_reverse_iterator(init_end());
}
init_const_reverse_iterator init_rbegin() const {
return init_const_reverse_iterator(init_end());
}
init_reverse_iterator init_rend() {
return init_reverse_iterator(init_begin());
}
init_const_reverse_iterator init_rend() const {
return init_const_reverse_iterator(init_begin());
}
/// getNumArgs - Determine the number of arguments used to
/// initialize the member or base.
unsigned getNumCtorInitializers() const {
return NumCtorInitializers;
}
void setNumCtorInitializers(unsigned numCtorInitializers) {
NumCtorInitializers = numCtorInitializers;
}
void setCtorInitializers(CXXCtorInitializer ** initializers) {
CtorInitializers = initializers;
}
/// isDelegatingConstructor - Whether this constructor is a
/// delegating constructor
bool isDelegatingConstructor() const {
return (getNumCtorInitializers() == 1) &&
CtorInitializers[0]->isDelegatingInitializer();
}
/// getTargetConstructor - When this constructor delegates to
/// another, retrieve the target
CXXConstructorDecl *getTargetConstructor() const;
/// isDefaultConstructor - Whether this constructor is a default
/// constructor (C++ [class.ctor]p5), which can be used to
/// default-initialize a class of this type.
bool isDefaultConstructor() const;
/// isCopyConstructor - Whether this constructor is a copy
/// constructor (C++ [class.copy]p2, which can be used to copy the
/// class. @p TypeQuals will be set to the qualifiers on the
/// argument type. For example, @p TypeQuals would be set to @c
/// QualType::Const for the following copy constructor:
///
/// @code
/// class X {
/// public:
/// X(const X&);
/// };
/// @endcode
bool isCopyConstructor(unsigned &TypeQuals) const;
/// isCopyConstructor - Whether this constructor is a copy
/// constructor (C++ [class.copy]p2, which can be used to copy the
/// class.
bool isCopyConstructor() const {
unsigned TypeQuals = 0;
return isCopyConstructor(TypeQuals);
}
/// \brief Determine whether this constructor is a move constructor
/// (C++0x [class.copy]p3), which can be used to move values of the class.
///
/// \param TypeQuals If this constructor is a move constructor, will be set
/// to the type qualifiers on the referent of the first parameter's type.
bool isMoveConstructor(unsigned &TypeQuals) const;
/// \brief Determine whether this constructor is a move constructor
/// (C++0x [class.copy]p3), which can be used to move values of the class.
bool isMoveConstructor() const {
unsigned TypeQuals = 0;
return isMoveConstructor(TypeQuals);
}
/// \brief Determine whether this is a copy or move constructor.
///
/// \param TypeQuals Will be set to the type qualifiers on the reference
/// parameter, if in fact this is a copy or move constructor.
bool isCopyOrMoveConstructor(unsigned &TypeQuals) const;
/// \brief Determine whether this a copy or move constructor.
bool isCopyOrMoveConstructor() const {
unsigned Quals;
return isCopyOrMoveConstructor(Quals);
}
/// isConvertingConstructor - Whether this constructor is a
/// converting constructor (C++ [class.conv.ctor]), which can be
/// used for user-defined conversions.
bool isConvertingConstructor(bool AllowExplicit) const;
/// \brief Determine whether this is a member template specialization that
/// would copy the object to itself. Such constructors are never used to copy
/// an object.
bool isSpecializationCopyingObject() const;
/// \brief Get the constructor that this inheriting constructor is based on.
const CXXConstructorDecl *getInheritedConstructor() const;
/// \brief Set the constructor that this inheriting constructor is based on.
void setInheritedConstructor(const CXXConstructorDecl *BaseCtor);
const CXXConstructorDecl *getCanonicalDecl() const {
return cast<CXXConstructorDecl>(FunctionDecl::getCanonicalDecl());
}
CXXConstructorDecl *getCanonicalDecl() {
return cast<CXXConstructorDecl>(FunctionDecl::getCanonicalDecl());
}
// Implement isa/cast/dyncast/etc.
static bool classof(const Decl *D) { return classofKind(D->getKind()); }
static bool classof(const CXXConstructorDecl *D) { return true; }
static bool classofKind(Kind K) { return K == CXXConstructor; }
friend class ASTDeclReader;
friend class ASTDeclWriter;
};
/// CXXDestructorDecl - Represents a C++ destructor within a
/// class. For example:
///
/// @code
/// class X {
/// public:
/// ~X(); // represented by a CXXDestructorDecl.
/// };
/// @endcode
class CXXDestructorDecl : public CXXMethodDecl {
virtual void anchor();
/// ImplicitlyDefined - Whether this destructor was implicitly
/// defined by the compiler. When false, the destructor was defined
/// by the user. In C++03, this flag will have the same value as
/// Implicit. In C++0x, however, a destructor that is
/// explicitly defaulted (i.e., defined with " = default") will have
/// @c !Implicit && ImplicitlyDefined.
bool ImplicitlyDefined : 1;
FunctionDecl *OperatorDelete;
CXXDestructorDecl(CXXRecordDecl *RD, SourceLocation StartLoc,
const DeclarationNameInfo &NameInfo,
QualType T, TypeSourceInfo *TInfo,
bool isInline, bool isImplicitlyDeclared)
: CXXMethodDecl(CXXDestructor, RD, StartLoc, NameInfo, T, TInfo, false,
SC_None, isInline, /*isConstexpr=*/false, SourceLocation()),
ImplicitlyDefined(false), OperatorDelete(0) {
setImplicit(isImplicitlyDeclared);
}
public:
static CXXDestructorDecl *Create(ASTContext &C, CXXRecordDecl *RD,
SourceLocation StartLoc,
const DeclarationNameInfo &NameInfo,
QualType T, TypeSourceInfo* TInfo,
bool isInline,
bool isImplicitlyDeclared);
static CXXDestructorDecl *CreateDeserialized(ASTContext & C, unsigned ID);
/// isImplicitlyDefined - Whether this destructor was implicitly
/// defined. If false, then this destructor was defined by the
/// user. This operation can only be invoked if the destructor has
/// already been defined.
bool isImplicitlyDefined() const {
assert(isThisDeclarationADefinition() &&
"Can only get the implicit-definition flag once the destructor has "
"been defined");
return ImplicitlyDefined;
}
/// setImplicitlyDefined - Set whether this destructor was
/// implicitly defined or not.
void setImplicitlyDefined(bool ID) {
assert(isThisDeclarationADefinition() &&
"Can only set the implicit-definition flag once the destructor has "
"been defined");
ImplicitlyDefined = ID;
}
void setOperatorDelete(FunctionDecl *OD) { OperatorDelete = OD; }
const FunctionDecl *getOperatorDelete() const { return OperatorDelete; }
// Implement isa/cast/dyncast/etc.
static bool classof(const Decl *D) { return classofKind(D->getKind()); }
static bool classof(const CXXDestructorDecl *D) { return true; }
static bool classofKind(Kind K) { return K == CXXDestructor; }
friend class ASTDeclReader;
friend class ASTDeclWriter;
};
/// CXXConversionDecl - Represents a C++ conversion function within a
/// class. For example:
///
/// @code
/// class X {
/// public:
/// operator bool();
/// };
/// @endcode
class CXXConversionDecl : public CXXMethodDecl {
virtual void anchor();
/// IsExplicitSpecified - Whether this conversion function declaration is
/// marked "explicit", meaning that it can only be applied when the user
/// explicitly wrote a cast. This is a C++0x feature.
bool IsExplicitSpecified : 1;
CXXConversionDecl(CXXRecordDecl *RD, SourceLocation StartLoc,
const DeclarationNameInfo &NameInfo,
QualType T, TypeSourceInfo *TInfo,
bool isInline, bool isExplicitSpecified,
bool isConstexpr, SourceLocation EndLocation)
: CXXMethodDecl(CXXConversion, RD, StartLoc, NameInfo, T, TInfo, false,
SC_None, isInline, isConstexpr, EndLocation),
IsExplicitSpecified(isExplicitSpecified) { }
public:
static CXXConversionDecl *Create(ASTContext &C, CXXRecordDecl *RD,
SourceLocation StartLoc,
const DeclarationNameInfo &NameInfo,
QualType T, TypeSourceInfo *TInfo,
bool isInline, bool isExplicit,
bool isConstexpr,
SourceLocation EndLocation);
static CXXConversionDecl *CreateDeserialized(ASTContext &C, unsigned ID);
/// IsExplicitSpecified - Whether this conversion function declaration is
/// marked "explicit", meaning that it can only be applied when the user
/// explicitly wrote a cast. This is a C++0x feature.
bool isExplicitSpecified() const { return IsExplicitSpecified; }
/// isExplicit - Whether this is an explicit conversion operator
/// (C++0x only). Explicit conversion operators are only considered
/// when the user has explicitly written a cast.
bool isExplicit() const {
return cast<CXXConversionDecl>(getFirstDeclaration())
->isExplicitSpecified();
}
/// getConversionType - Returns the type that this conversion
/// function is converting to.
QualType getConversionType() const {
return getType()->getAs<FunctionType>()->getResultType();
}
/// \brief Determine whether this conversion function is a conversion from
/// a lambda closure type to a block pointer.
bool isLambdaToBlockPointerConversion() const;
// Implement isa/cast/dyncast/etc.
static bool classof(const Decl *D) { return classofKind(D->getKind()); }
static bool classof(const CXXConversionDecl *D) { return true; }
static bool classofKind(Kind K) { return K == CXXConversion; }
friend class ASTDeclReader;
friend class ASTDeclWriter;
};
/// LinkageSpecDecl - This represents a linkage specification. For example:
/// extern "C" void foo();
///
class LinkageSpecDecl : public Decl, public DeclContext {
virtual void anchor();
public:
/// LanguageIDs - Used to represent the language in a linkage
/// specification. The values are part of the serialization abi for
/// ASTs and cannot be changed without altering that abi. To help
/// ensure a stable abi for this, we choose the DW_LANG_ encodings
/// from the dwarf standard.
enum LanguageIDs {
lang_c = /* DW_LANG_C */ 0x0002,
lang_cxx = /* DW_LANG_C_plus_plus */ 0x0004
};
private:
/// Language - The language for this linkage specification.
LanguageIDs Language;
/// ExternLoc - The source location for the extern keyword.
SourceLocation ExternLoc;
/// RBraceLoc - The source location for the right brace (if valid).
SourceLocation RBraceLoc;
LinkageSpecDecl(DeclContext *DC, SourceLocation ExternLoc,
SourceLocation LangLoc, LanguageIDs lang,
SourceLocation RBLoc)
: Decl(LinkageSpec, DC, LangLoc), DeclContext(LinkageSpec),
Language(lang), ExternLoc(ExternLoc), RBraceLoc(RBLoc) { }
public:
static LinkageSpecDecl *Create(ASTContext &C, DeclContext *DC,
SourceLocation ExternLoc,
SourceLocation LangLoc, LanguageIDs Lang,
SourceLocation RBraceLoc = SourceLocation());
static LinkageSpecDecl *CreateDeserialized(ASTContext &C, unsigned ID);
/// \brief Return the language specified by this linkage specification.
LanguageIDs getLanguage() const { return Language; }
/// \brief Set the language specified by this linkage specification.
void setLanguage(LanguageIDs L) { Language = L; }
/// \brief Determines whether this linkage specification had braces in
/// its syntactic form.
bool hasBraces() const { return RBraceLoc.isValid(); }
SourceLocation getExternLoc() const { return ExternLoc; }
SourceLocation getRBraceLoc() const { return RBraceLoc; }
void setExternLoc(SourceLocation L) { ExternLoc = L; }
void setRBraceLoc(SourceLocation L) { RBraceLoc = L; }
SourceLocation getLocEnd() const LLVM_READONLY {
if (hasBraces())
return getRBraceLoc();
// No braces: get the end location of the (only) declaration in context
// (if present).
return decls_empty() ? getLocation() : decls_begin()->getLocEnd();
}
SourceRange getSourceRange() const LLVM_READONLY {
return SourceRange(ExternLoc, getLocEnd());
}
static bool classof(const Decl *D) { return classofKind(D->getKind()); }
static bool classof(const LinkageSpecDecl *D) { return true; }
static bool classofKind(Kind K) { return K == LinkageSpec; }
static DeclContext *castToDeclContext(const LinkageSpecDecl *D) {
return static_cast<DeclContext *>(const_cast<LinkageSpecDecl*>(D));
}
static LinkageSpecDecl *castFromDeclContext(const DeclContext *DC) {
return static_cast<LinkageSpecDecl *>(const_cast<DeclContext*>(DC));
}
};
/// UsingDirectiveDecl - Represents C++ using-directive. For example:
///
/// using namespace std;
///
// NB: UsingDirectiveDecl should be Decl not NamedDecl, but we provide
// artificial names for all using-directives in order to store
// them in DeclContext effectively.
class UsingDirectiveDecl : public NamedDecl {
virtual void anchor();
/// \brief The location of the "using" keyword.
SourceLocation UsingLoc;
/// SourceLocation - Location of 'namespace' token.
SourceLocation NamespaceLoc;
/// \brief The nested-name-specifier that precedes the namespace.
NestedNameSpecifierLoc QualifierLoc;
/// NominatedNamespace - Namespace nominated by using-directive.
NamedDecl *NominatedNamespace;
/// Enclosing context containing both using-directive and nominated
/// namespace.
DeclContext *CommonAncestor;
/// getUsingDirectiveName - Returns special DeclarationName used by
/// using-directives. This is only used by DeclContext for storing
/// UsingDirectiveDecls in its lookup structure.
static DeclarationName getName() {
return DeclarationName::getUsingDirectiveName();
}
UsingDirectiveDecl(DeclContext *DC, SourceLocation UsingLoc,
SourceLocation NamespcLoc,
NestedNameSpecifierLoc QualifierLoc,
SourceLocation IdentLoc,
NamedDecl *Nominated,
DeclContext *CommonAncestor)
: NamedDecl(UsingDirective, DC, IdentLoc, getName()), UsingLoc(UsingLoc),
NamespaceLoc(NamespcLoc), QualifierLoc(QualifierLoc),
NominatedNamespace(Nominated), CommonAncestor(CommonAncestor) { }
public:
/// \brief Retrieve the nested-name-specifier that qualifies the
/// name of the namespace, with source-location information.
NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; }
/// \brief Retrieve the nested-name-specifier that qualifies the
/// name of the namespace.
NestedNameSpecifier *getQualifier() const {
return QualifierLoc.getNestedNameSpecifier();
}
NamedDecl *getNominatedNamespaceAsWritten() { return NominatedNamespace; }
const NamedDecl *getNominatedNamespaceAsWritten() const {
return NominatedNamespace;
}
/// getNominatedNamespace - Returns namespace nominated by using-directive.
NamespaceDecl *getNominatedNamespace();
const NamespaceDecl *getNominatedNamespace() const {
return const_cast<UsingDirectiveDecl*>(this)->getNominatedNamespace();
}
/// \brief Returns the common ancestor context of this using-directive and
/// its nominated namespace.
DeclContext *getCommonAncestor() { return CommonAncestor; }
const DeclContext *getCommonAncestor() const { return CommonAncestor; }
/// \brief Return the location of the "using" keyword.
SourceLocation getUsingLoc() const { return UsingLoc; }
// FIXME: Could omit 'Key' in name.
/// getNamespaceKeyLocation - Returns location of namespace keyword.
SourceLocation getNamespaceKeyLocation() const { return NamespaceLoc; }
/// getIdentLocation - Returns location of identifier.
SourceLocation getIdentLocation() const { return getLocation(); }
static UsingDirectiveDecl *Create(ASTContext &C, DeclContext *DC,
SourceLocation UsingLoc,
SourceLocation NamespaceLoc,
NestedNameSpecifierLoc QualifierLoc,
SourceLocation IdentLoc,
NamedDecl *Nominated,
DeclContext *CommonAncestor);
static UsingDirectiveDecl *CreateDeserialized(ASTContext &C, unsigned ID);
SourceRange getSourceRange() const LLVM_READONLY {
return SourceRange(UsingLoc, getLocation());
}
static bool classof(const Decl *D) { return classofKind(D->getKind()); }
static bool classof(const UsingDirectiveDecl *D) { return true; }
static bool classofKind(Kind K) { return K == UsingDirective; }
// Friend for getUsingDirectiveName.
friend class DeclContext;
friend class ASTDeclReader;
};
/// \brief Represents a C++ namespace alias.
///
/// For example:
///
/// @code
/// namespace Foo = Bar;
/// @endcode
class NamespaceAliasDecl : public NamedDecl {
virtual void anchor();
/// \brief The location of the "namespace" keyword.
SourceLocation NamespaceLoc;
/// IdentLoc - Location of namespace identifier. Accessed by TargetNameLoc.
SourceLocation IdentLoc;
/// \brief The nested-name-specifier that precedes the namespace.
NestedNameSpecifierLoc QualifierLoc;
/// Namespace - The Decl that this alias points to. Can either be a
/// NamespaceDecl or a NamespaceAliasDecl.
NamedDecl *Namespace;
NamespaceAliasDecl(DeclContext *DC, SourceLocation NamespaceLoc,
SourceLocation AliasLoc, IdentifierInfo *Alias,
NestedNameSpecifierLoc QualifierLoc,
SourceLocation IdentLoc, NamedDecl *Namespace)
: NamedDecl(NamespaceAlias, DC, AliasLoc, Alias),
NamespaceLoc(NamespaceLoc), IdentLoc(IdentLoc),
QualifierLoc(QualifierLoc), Namespace(Namespace) { }
friend class ASTDeclReader;
public:
/// \brief Retrieve the nested-name-specifier that qualifies the
/// name of the namespace, with source-location information.
NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; }
/// \brief Retrieve the nested-name-specifier that qualifies the
/// name of the namespace.
NestedNameSpecifier *getQualifier() const {
return QualifierLoc.getNestedNameSpecifier();
}
/// \brief Retrieve the namespace declaration aliased by this directive.
NamespaceDecl *getNamespace() {
if (NamespaceAliasDecl *AD = dyn_cast<NamespaceAliasDecl>(Namespace))
return AD->getNamespace();
return cast<NamespaceDecl>(Namespace);
}
const NamespaceDecl *getNamespace() const {
return const_cast<NamespaceAliasDecl*>(this)->getNamespace();
}
/// Returns the location of the alias name, i.e. 'foo' in
/// "namespace foo = ns::bar;".
SourceLocation getAliasLoc() const { return getLocation(); }
/// Returns the location of the 'namespace' keyword.
SourceLocation getNamespaceLoc() const { return NamespaceLoc; }
/// Returns the location of the identifier in the named namespace.
SourceLocation getTargetNameLoc() const { return IdentLoc; }
/// \brief Retrieve the namespace that this alias refers to, which
/// may either be a NamespaceDecl or a NamespaceAliasDecl.
NamedDecl *getAliasedNamespace() const { return Namespace; }
static NamespaceAliasDecl *Create(ASTContext &C, DeclContext *DC,
SourceLocation NamespaceLoc,
SourceLocation AliasLoc,
IdentifierInfo *Alias,
NestedNameSpecifierLoc QualifierLoc,
SourceLocation IdentLoc,
NamedDecl *Namespace);
static NamespaceAliasDecl *CreateDeserialized(ASTContext &C, unsigned ID);
virtual SourceRange getSourceRange() const LLVM_READONLY {
return SourceRange(NamespaceLoc, IdentLoc);
}
static bool classof(const Decl *D) { return classofKind(D->getKind()); }
static bool classof(const NamespaceAliasDecl *D) { return true; }
static bool classofKind(Kind K) { return K == NamespaceAlias; }
};
/// \brief Represents a shadow declaration introduced into a scope by a
/// (resolved) using declaration.
///
/// For example,
/// @code
/// namespace A {
/// void foo();
/// }
/// namespace B {
/// using A::foo; // <- a UsingDecl
/// // Also creates a UsingShadowDecl for A::foo() in B
/// }
/// @endcode
class UsingShadowDecl : public NamedDecl {
virtual void anchor();
/// The referenced declaration.
NamedDecl *Underlying;
/// \brief The using declaration which introduced this decl or the next using
/// shadow declaration contained in the aforementioned using declaration.
NamedDecl *UsingOrNextShadow;
friend class UsingDecl;
UsingShadowDecl(DeclContext *DC, SourceLocation Loc, UsingDecl *Using,
NamedDecl *Target)
: NamedDecl(UsingShadow, DC, Loc, DeclarationName()),
Underlying(Target),
UsingOrNextShadow(reinterpret_cast<NamedDecl *>(Using)) {
if (Target) {
setDeclName(Target->getDeclName());
IdentifierNamespace = Target->getIdentifierNamespace();
}
setImplicit();
}
public:
static UsingShadowDecl *Create(ASTContext &C, DeclContext *DC,
SourceLocation Loc, UsingDecl *Using,
NamedDecl *Target) {
return new (C) UsingShadowDecl(DC, Loc, Using, Target);
}
static UsingShadowDecl *CreateDeserialized(ASTContext &C, unsigned ID);
/// \brief Gets the underlying declaration which has been brought into the
/// local scope.
NamedDecl *getTargetDecl() const { return Underlying; }
/// \brief Sets the underlying declaration which has been brought into the
/// local scope.
void setTargetDecl(NamedDecl* ND) {
assert(ND && "Target decl is null!");
Underlying = ND;
IdentifierNamespace = ND->getIdentifierNamespace();
}
/// \brief Gets the using declaration to which this declaration is tied.
UsingDecl *getUsingDecl() const;
/// \brief The next using shadow declaration contained in the shadow decl
/// chain of the using declaration which introduced this decl.
UsingShadowDecl *getNextUsingShadowDecl() const {
return dyn_cast_or_null<UsingShadowDecl>(UsingOrNextShadow);
}
static bool classof(const Decl *D) { return classofKind(D->getKind()); }
static bool classof(const UsingShadowDecl *D) { return true; }
static bool classofKind(Kind K) { return K == Decl::UsingShadow; }
friend class ASTDeclReader;
friend class ASTDeclWriter;
};
/// \brief Represents a C++ using-declaration.
///
/// For example:
/// @code
/// using someNameSpace::someIdentifier;
/// @endcode
class UsingDecl : public NamedDecl {
virtual void anchor();
/// \brief The source location of the "using" location itself.
SourceLocation UsingLocation;
/// \brief The nested-name-specifier that precedes the name.
NestedNameSpecifierLoc QualifierLoc;
/// DNLoc - Provides source/type location info for the
/// declaration name embedded in the ValueDecl base class.
DeclarationNameLoc DNLoc;
/// \brief The first shadow declaration of the shadow decl chain associated
/// with this using declaration.
///
/// The bool member of the pair store whether this decl has the \c typename
/// keyword.
llvm::PointerIntPair<UsingShadowDecl *, 1, bool> FirstUsingShadow;
UsingDecl(DeclContext *DC, SourceLocation UL,
NestedNameSpecifierLoc QualifierLoc,
const DeclarationNameInfo &NameInfo, bool IsTypeNameArg)
: NamedDecl(Using, DC, NameInfo.getLoc(), NameInfo.getName()),
UsingLocation(UL), QualifierLoc(QualifierLoc),
DNLoc(NameInfo.getInfo()), FirstUsingShadow(0, IsTypeNameArg) {
}
public:
/// \brief Returns the source location of the "using" keyword.
SourceLocation getUsingLocation() const { return UsingLocation; }
/// \brief Set the source location of the 'using' keyword.
void setUsingLocation(SourceLocation L) { UsingLocation = L; }
/// \brief Retrieve the nested-name-specifier that qualifies the name,
/// with source-location information.
NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; }
/// \brief Retrieve the nested-name-specifier that qualifies the name.
NestedNameSpecifier *getQualifier() const {
return QualifierLoc.getNestedNameSpecifier();
}
DeclarationNameInfo getNameInfo() const {
return DeclarationNameInfo(getDeclName(), getLocation(), DNLoc);
}
/// \brief Return true if the using declaration has 'typename'.
bool isTypeName() const { return FirstUsingShadow.getInt(); }
/// \brief Sets whether the using declaration has 'typename'.
void setTypeName(bool TN) { FirstUsingShadow.setInt(TN); }
/// \brief Iterates through the using shadow declarations assosiated with
/// this using declaration.
class shadow_iterator {
/// \brief The current using shadow declaration.
UsingShadowDecl *Current;
public:
typedef UsingShadowDecl* value_type;
typedef UsingShadowDecl* reference;
typedef UsingShadowDecl* pointer;
typedef std::forward_iterator_tag iterator_category;
typedef std::ptrdiff_t difference_type;
shadow_iterator() : Current(0) { }
explicit shadow_iterator(UsingShadowDecl *C) : Current(C) { }
reference operator*() const { return Current; }
pointer operator->() const { return Current; }
shadow_iterator& operator++() {
Current = Current->getNextUsingShadowDecl();
return *this;
}
shadow_iterator operator++(int) {
shadow_iterator tmp(*this);
++(*this);
return tmp;
}
friend bool operator==(shadow_iterator x, shadow_iterator y) {
return x.Current == y.Current;
}
friend bool operator!=(shadow_iterator x, shadow_iterator y) {
return x.Current != y.Current;
}
};
shadow_iterator shadow_begin() const {
return shadow_iterator(FirstUsingShadow.getPointer());
}
shadow_iterator shadow_end() const { return shadow_iterator(); }
/// \brief Return the number of shadowed declarations associated with this
/// using declaration.
unsigned shadow_size() const {
return std::distance(shadow_begin(), shadow_end());
}
void addShadowDecl(UsingShadowDecl *S);
void removeShadowDecl(UsingShadowDecl *S);
static UsingDecl *Create(ASTContext &C, DeclContext *DC,
SourceLocation UsingL,
NestedNameSpecifierLoc QualifierLoc,
const DeclarationNameInfo &NameInfo,
bool IsTypeNameArg);
static UsingDecl *CreateDeserialized(ASTContext &C, unsigned ID);
SourceRange getSourceRange() const LLVM_READONLY {
return SourceRange(UsingLocation, getNameInfo().getEndLoc());
}
static bool classof(const Decl *D) { return classofKind(D->getKind()); }
static bool classof(const UsingDecl *D) { return true; }
static bool classofKind(Kind K) { return K == Using; }
friend class ASTDeclReader;
friend class ASTDeclWriter;
};
/// \brief Represents a dependent using declaration which was not marked with