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llvm-project/clang/lib/AST/DeclCXX.cpp
John McCall 578a1f8c6d If a non-template constructor instantiated to X(X), 
ignore it during overload resolution when initializing
X from a value of type cv X.

Previously, our rule here only ignored specializations
of constructor templates.  That's probably because the
standard says that constructors are outright ill-formed
if their first parameter is literally X and they're
callable with one argument.  However, Clang only
enforces that prohibition against non-implicit
instantiations; I'm not sure why, but it seems to be
deliberate.  Given that, the most sensible thing to
do is to just ignore the "illegal" constructor
regardless of where it came from.

Also, stop ignoring such constructors silently:
print a note explaining why they're being ignored.

Fixes <rdar://19199836>.

llvm-svn: 224205
2014-12-14 01:46:53 +00:00

2207 lines
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//===--- DeclCXX.cpp - C++ Declaration AST Node Implementation ------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the C++ related Decl classes.
//
//===----------------------------------------------------------------------===//
#include "clang/AST/DeclCXX.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/ASTLambda.h"
#include "clang/AST/ASTMutationListener.h"
#include "clang/AST/CXXInheritance.h"
#include "clang/AST/DeclTemplate.h"
#include "clang/AST/Expr.h"
#include "clang/AST/ExprCXX.h"
#include "clang/AST/TypeLoc.h"
#include "clang/Basic/IdentifierTable.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallPtrSet.h"
using namespace clang;
//===----------------------------------------------------------------------===//
// Decl Allocation/Deallocation Method Implementations
//===----------------------------------------------------------------------===//
void AccessSpecDecl::anchor() { }
AccessSpecDecl *AccessSpecDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) AccessSpecDecl(EmptyShell());
}
void LazyASTUnresolvedSet::getFromExternalSource(ASTContext &C) const {
ExternalASTSource *Source = C.getExternalSource();
assert(Impl.Decls.isLazy() && "getFromExternalSource for non-lazy set");
assert(Source && "getFromExternalSource with no external source");
for (ASTUnresolvedSet::iterator I = Impl.begin(); I != Impl.end(); ++I)
I.setDecl(cast<NamedDecl>(Source->GetExternalDecl(
reinterpret_cast<uintptr_t>(I.getDecl()) >> 2)));
Impl.Decls.setLazy(false);
}
CXXRecordDecl::DefinitionData::DefinitionData(CXXRecordDecl *D)
: UserDeclaredConstructor(false), UserDeclaredSpecialMembers(0),
Aggregate(true), PlainOldData(true), Empty(true), Polymorphic(false),
Abstract(false), IsStandardLayout(true), HasNoNonEmptyBases(true),
HasPrivateFields(false), HasProtectedFields(false), HasPublicFields(false),
HasMutableFields(false), HasVariantMembers(false), HasOnlyCMembers(true),
HasInClassInitializer(false), HasUninitializedReferenceMember(false),
NeedOverloadResolutionForMoveConstructor(false),
NeedOverloadResolutionForMoveAssignment(false),
NeedOverloadResolutionForDestructor(false),
DefaultedMoveConstructorIsDeleted(false),
DefaultedMoveAssignmentIsDeleted(false),
DefaultedDestructorIsDeleted(false),
HasTrivialSpecialMembers(SMF_All),
DeclaredNonTrivialSpecialMembers(0),
HasIrrelevantDestructor(true),
HasConstexprNonCopyMoveConstructor(false),
DefaultedDefaultConstructorIsConstexpr(true),
HasConstexprDefaultConstructor(false),
HasNonLiteralTypeFieldsOrBases(false), ComputedVisibleConversions(false),
UserProvidedDefaultConstructor(false), DeclaredSpecialMembers(0),
ImplicitCopyConstructorHasConstParam(true),
ImplicitCopyAssignmentHasConstParam(true),
HasDeclaredCopyConstructorWithConstParam(false),
HasDeclaredCopyAssignmentWithConstParam(false),
IsLambda(false), IsParsingBaseSpecifiers(false), NumBases(0), NumVBases(0),
Bases(), VBases(),
Definition(D), FirstFriend() {
}
CXXBaseSpecifier *CXXRecordDecl::DefinitionData::getBasesSlowCase() const {
return Bases.get(Definition->getASTContext().getExternalSource());
}
CXXBaseSpecifier *CXXRecordDecl::DefinitionData::getVBasesSlowCase() const {
return VBases.get(Definition->getASTContext().getExternalSource());
}
CXXRecordDecl::CXXRecordDecl(Kind K, TagKind TK, const ASTContext &C,
DeclContext *DC, SourceLocation StartLoc,
SourceLocation IdLoc, IdentifierInfo *Id,
CXXRecordDecl *PrevDecl)
: RecordDecl(K, TK, C, DC, StartLoc, IdLoc, Id, PrevDecl),
DefinitionData(PrevDecl ? PrevDecl->DefinitionData
: DefinitionDataPtr(this)),
TemplateOrInstantiation() {}
CXXRecordDecl *CXXRecordDecl::Create(const ASTContext &C, TagKind TK,
DeclContext *DC, SourceLocation StartLoc,
SourceLocation IdLoc, IdentifierInfo *Id,
CXXRecordDecl* PrevDecl,
bool DelayTypeCreation) {
CXXRecordDecl *R = new (C, DC) CXXRecordDecl(CXXRecord, TK, C, DC, StartLoc,
IdLoc, Id, PrevDecl);
R->MayHaveOutOfDateDef = C.getLangOpts().Modules;
// FIXME: DelayTypeCreation seems like such a hack
if (!DelayTypeCreation)
C.getTypeDeclType(R, PrevDecl);
return R;
}
CXXRecordDecl *
CXXRecordDecl::CreateLambda(const ASTContext &C, DeclContext *DC,
TypeSourceInfo *Info, SourceLocation Loc,
bool Dependent, bool IsGeneric,
LambdaCaptureDefault CaptureDefault) {
CXXRecordDecl *R =
new (C, DC) CXXRecordDecl(CXXRecord, TTK_Class, C, DC, Loc, Loc,
nullptr, nullptr);
R->IsBeingDefined = true;
R->DefinitionData =
new (C) struct LambdaDefinitionData(R, Info, Dependent, IsGeneric,
CaptureDefault);
R->MayHaveOutOfDateDef = false;
R->setImplicit(true);
C.getTypeDeclType(R, /*PrevDecl=*/nullptr);
return R;
}
CXXRecordDecl *
CXXRecordDecl::CreateDeserialized(const ASTContext &C, unsigned ID) {
CXXRecordDecl *R = new (C, ID) CXXRecordDecl(
CXXRecord, TTK_Struct, C, nullptr, SourceLocation(), SourceLocation(),
nullptr, nullptr);
R->MayHaveOutOfDateDef = false;
return R;
}
void
CXXRecordDecl::setBases(CXXBaseSpecifier const * const *Bases,
unsigned NumBases) {
ASTContext &C = getASTContext();
if (!data().Bases.isOffset() && data().NumBases > 0)
C.Deallocate(data().getBases());
if (NumBases) {
// C++ [dcl.init.aggr]p1:
// An aggregate is [...] a class with [...] no base classes [...].
data().Aggregate = false;
// C++ [class]p4:
// A POD-struct is an aggregate class...
data().PlainOldData = false;
}
// The set of seen virtual base types.
llvm::SmallPtrSet<CanQualType, 8> SeenVBaseTypes;
// The virtual bases of this class.
SmallVector<const CXXBaseSpecifier *, 8> VBases;
data().Bases = new(C) CXXBaseSpecifier [NumBases];
data().NumBases = NumBases;
for (unsigned i = 0; i < NumBases; ++i) {
data().getBases()[i] = *Bases[i];
// Keep track of inherited vbases for this base class.
const CXXBaseSpecifier *Base = Bases[i];
QualType BaseType = Base->getType();
// Skip dependent types; we can't do any checking on them now.
if (BaseType->isDependentType())
continue;
CXXRecordDecl *BaseClassDecl
= cast<CXXRecordDecl>(BaseType->getAs<RecordType>()->getDecl());
// A class with a non-empty base class is not empty.
// FIXME: Standard ref?
if (!BaseClassDecl->isEmpty()) {
if (!data().Empty) {
// C++0x [class]p7:
// A standard-layout class is a class that:
// [...]
// -- 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
// If this is the second non-empty base, then neither of these two
// clauses can be true.
data().IsStandardLayout = false;
}
data().Empty = false;
data().HasNoNonEmptyBases = false;
}
// C++ [class.virtual]p1:
// A class that declares or inherits a virtual function is called a
// polymorphic class.
if (BaseClassDecl->isPolymorphic())
data().Polymorphic = true;
// C++0x [class]p7:
// A standard-layout class is a class that: [...]
// -- has no non-standard-layout base classes
if (!BaseClassDecl->isStandardLayout())
data().IsStandardLayout = false;
// Record if this base is the first non-literal field or base.
if (!hasNonLiteralTypeFieldsOrBases() && !BaseType->isLiteralType(C))
data().HasNonLiteralTypeFieldsOrBases = true;
// Now go through all virtual bases of this base and add them.
for (const auto &VBase : BaseClassDecl->vbases()) {
// Add this base if it's not already in the list.
if (SeenVBaseTypes.insert(C.getCanonicalType(VBase.getType())).second) {
VBases.push_back(&VBase);
// C++11 [class.copy]p8:
// The implicitly-declared copy constructor for a class X will have
// the form 'X::X(const X&)' if each [...] virtual base class B of X
// has a copy constructor whose first parameter is of type
// 'const B&' or 'const volatile B&' [...]
if (CXXRecordDecl *VBaseDecl = VBase.getType()->getAsCXXRecordDecl())
if (!VBaseDecl->hasCopyConstructorWithConstParam())
data().ImplicitCopyConstructorHasConstParam = false;
}
}
if (Base->isVirtual()) {
// Add this base if it's not already in the list.
if (SeenVBaseTypes.insert(C.getCanonicalType(BaseType)).second)
VBases.push_back(Base);
// C++0x [meta.unary.prop] is_empty:
// T is a class type, but not a union type, with ... no virtual base
// classes
data().Empty = false;
// C++11 [class.ctor]p5, C++11 [class.copy]p12, C++11 [class.copy]p25:
// A [default constructor, copy/move constructor, or copy/move assignment
// operator for a class X] is trivial [...] if:
// -- class X has [...] no virtual base classes
data().HasTrivialSpecialMembers &= SMF_Destructor;
// C++0x [class]p7:
// A standard-layout class is a class that: [...]
// -- has [...] no virtual base classes
data().IsStandardLayout = false;
// C++11 [dcl.constexpr]p4:
// In the definition of a constexpr constructor [...]
// -- the class shall not have any virtual base classes
data().DefaultedDefaultConstructorIsConstexpr = false;
} else {
// C++ [class.ctor]p5:
// A default constructor is trivial [...] if:
// -- all the direct base classes of its class have trivial default
// constructors.
if (!BaseClassDecl->hasTrivialDefaultConstructor())
data().HasTrivialSpecialMembers &= ~SMF_DefaultConstructor;
// C++0x [class.copy]p13:
// A copy/move constructor for class X is trivial if [...]
// [...]
// -- the constructor selected to copy/move each direct base class
// subobject is trivial, and
if (!BaseClassDecl->hasTrivialCopyConstructor())
data().HasTrivialSpecialMembers &= ~SMF_CopyConstructor;
// If the base class doesn't have a simple move constructor, we'll eagerly
// declare it and perform overload resolution to determine which function
// it actually calls. If it does have a simple move constructor, this
// check is correct.
if (!BaseClassDecl->hasTrivialMoveConstructor())
data().HasTrivialSpecialMembers &= ~SMF_MoveConstructor;
// C++0x [class.copy]p27:
// A copy/move assignment operator for class X is trivial if [...]
// [...]
// -- the assignment operator selected to copy/move each direct base
// class subobject is trivial, and
if (!BaseClassDecl->hasTrivialCopyAssignment())
data().HasTrivialSpecialMembers &= ~SMF_CopyAssignment;
// If the base class doesn't have a simple move assignment, we'll eagerly
// declare it and perform overload resolution to determine which function
// it actually calls. If it does have a simple move assignment, this
// check is correct.
if (!BaseClassDecl->hasTrivialMoveAssignment())
data().HasTrivialSpecialMembers &= ~SMF_MoveAssignment;
// C++11 [class.ctor]p6:
// If that user-written default constructor would satisfy the
// requirements of a constexpr constructor, the implicitly-defined
// default constructor is constexpr.
if (!BaseClassDecl->hasConstexprDefaultConstructor())
data().DefaultedDefaultConstructorIsConstexpr = false;
}
// C++ [class.ctor]p3:
// A destructor is trivial if all the direct base classes of its class
// have trivial destructors.
if (!BaseClassDecl->hasTrivialDestructor())
data().HasTrivialSpecialMembers &= ~SMF_Destructor;
if (!BaseClassDecl->hasIrrelevantDestructor())
data().HasIrrelevantDestructor = false;
// C++11 [class.copy]p18:
// The implicitly-declared copy assignment oeprator for a class X will
// have the form 'X& X::operator=(const X&)' if each direct base class B
// of X has a copy assignment operator whose parameter is of type 'const
// B&', 'const volatile B&', or 'B' [...]
if (!BaseClassDecl->hasCopyAssignmentWithConstParam())
data().ImplicitCopyAssignmentHasConstParam = false;
// C++11 [class.copy]p8:
// The implicitly-declared copy constructor for a class X will have
// the form 'X::X(const X&)' if each direct [...] base class B of X
// has a copy constructor whose first parameter is of type
// 'const B&' or 'const volatile B&' [...]
if (!BaseClassDecl->hasCopyConstructorWithConstParam())
data().ImplicitCopyConstructorHasConstParam = false;
// A class has an Objective-C object member if... or any of its bases
// has an Objective-C object member.
if (BaseClassDecl->hasObjectMember())
setHasObjectMember(true);
if (BaseClassDecl->hasVolatileMember())
setHasVolatileMember(true);
// Keep track of the presence of mutable fields.
if (BaseClassDecl->hasMutableFields())
data().HasMutableFields = true;
if (BaseClassDecl->hasUninitializedReferenceMember())
data().HasUninitializedReferenceMember = true;
addedClassSubobject(BaseClassDecl);
}
if (VBases.empty()) {
data().IsParsingBaseSpecifiers = false;
return;
}
// Create base specifier for any direct or indirect virtual bases.
data().VBases = new (C) CXXBaseSpecifier[VBases.size()];
data().NumVBases = VBases.size();
for (int I = 0, E = VBases.size(); I != E; ++I) {
QualType Type = VBases[I]->getType();
if (!Type->isDependentType())
addedClassSubobject(Type->getAsCXXRecordDecl());
data().getVBases()[I] = *VBases[I];
}
data().IsParsingBaseSpecifiers = false;
}
void CXXRecordDecl::addedClassSubobject(CXXRecordDecl *Subobj) {
// C++11 [class.copy]p11:
// A defaulted copy/move constructor for a class X is defined as
// deleted if X has:
// -- a direct or virtual base class B that cannot be copied/moved [...]
// -- a non-static data member of class type M (or array thereof)
// that cannot be copied or moved [...]
if (!Subobj->hasSimpleMoveConstructor())
data().NeedOverloadResolutionForMoveConstructor = true;
// C++11 [class.copy]p23:
// A defaulted copy/move assignment operator for a class X is defined as
// deleted if X has:
// -- a direct or virtual base class B that cannot be copied/moved [...]
// -- a non-static data member of class type M (or array thereof)
// that cannot be copied or moved [...]
if (!Subobj->hasSimpleMoveAssignment())
data().NeedOverloadResolutionForMoveAssignment = true;
// C++11 [class.ctor]p5, C++11 [class.copy]p11, C++11 [class.dtor]p5:
// A defaulted [ctor or dtor] for a class X is defined as
// deleted if X has:
// -- any direct or virtual base class [...] has a type with a destructor
// that is deleted or inaccessible from the defaulted [ctor or dtor].
// -- any non-static data member has a type with a destructor
// that is deleted or inaccessible from the defaulted [ctor or dtor].
if (!Subobj->hasSimpleDestructor()) {
data().NeedOverloadResolutionForMoveConstructor = true;
data().NeedOverloadResolutionForDestructor = true;
}
}
/// Callback function for CXXRecordDecl::forallBases that acknowledges
/// that it saw a base class.
static bool SawBase(const CXXRecordDecl *, void *) {
return true;
}
bool CXXRecordDecl::hasAnyDependentBases() const {
if (!isDependentContext())
return false;
return !forallBases(SawBase, nullptr);
}
bool CXXRecordDecl::isTriviallyCopyable() const {
// C++0x [class]p5:
// A trivially copyable class is a class that:
// -- has no non-trivial copy constructors,
if (hasNonTrivialCopyConstructor()) return false;
// -- has no non-trivial move constructors,
if (hasNonTrivialMoveConstructor()) return false;
// -- has no non-trivial copy assignment operators,
if (hasNonTrivialCopyAssignment()) return false;
// -- has no non-trivial move assignment operators, and
if (hasNonTrivialMoveAssignment()) return false;
// -- has a trivial destructor.
if (!hasTrivialDestructor()) return false;
return true;
}
void CXXRecordDecl::markedVirtualFunctionPure() {
// C++ [class.abstract]p2:
// A class is abstract if it has at least one pure virtual function.
data().Abstract = true;
}
void CXXRecordDecl::addedMember(Decl *D) {
if (!D->isImplicit() &&
!isa<FieldDecl>(D) &&
!isa<IndirectFieldDecl>(D) &&
(!isa<TagDecl>(D) || cast<TagDecl>(D)->getTagKind() == TTK_Class ||
cast<TagDecl>(D)->getTagKind() == TTK_Interface))
data().HasOnlyCMembers = false;
// Ignore friends and invalid declarations.
if (D->getFriendObjectKind() || D->isInvalidDecl())
return;
FunctionTemplateDecl *FunTmpl = dyn_cast<FunctionTemplateDecl>(D);
if (FunTmpl)
D = FunTmpl->getTemplatedDecl();
if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) {
if (Method->isVirtual()) {
// C++ [dcl.init.aggr]p1:
// An aggregate is an array or a class with [...] no virtual functions.
data().Aggregate = false;
// C++ [class]p4:
// A POD-struct is an aggregate class...
data().PlainOldData = false;
// Virtual functions make the class non-empty.
// FIXME: Standard ref?
data().Empty = false;
// C++ [class.virtual]p1:
// A class that declares or inherits a virtual function is called a
// polymorphic class.
data().Polymorphic = true;
// C++11 [class.ctor]p5, C++11 [class.copy]p12, C++11 [class.copy]p25:
// A [default constructor, copy/move constructor, or copy/move
// assignment operator for a class X] is trivial [...] if:
// -- class X has no virtual functions [...]
data().HasTrivialSpecialMembers &= SMF_Destructor;
// C++0x [class]p7:
// A standard-layout class is a class that: [...]
// -- has no virtual functions
data().IsStandardLayout = false;
}
}
// Notify the listener if an implicit member was added after the definition
// was completed.
if (!isBeingDefined() && D->isImplicit())
if (ASTMutationListener *L = getASTMutationListener())
L->AddedCXXImplicitMember(data().Definition, D);
// The kind of special member this declaration is, if any.
unsigned SMKind = 0;
// Handle constructors.
if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(D)) {
if (!Constructor->isImplicit()) {
// Note that we have a user-declared constructor.
data().UserDeclaredConstructor = true;
// C++ [class]p4:
// A POD-struct is an aggregate class [...]
// Since the POD bit is meant to be C++03 POD-ness, clear it even if the
// type is technically an aggregate in C++0x since it wouldn't be in 03.
data().PlainOldData = false;
}
// Technically, "user-provided" is only defined for special member
// functions, but the intent of the standard is clearly that it should apply
// to all functions.
bool UserProvided = Constructor->isUserProvided();
if (Constructor->isDefaultConstructor()) {
SMKind |= SMF_DefaultConstructor;
if (UserProvided)
data().UserProvidedDefaultConstructor = true;
if (Constructor->isConstexpr())
data().HasConstexprDefaultConstructor = true;
}
if (!FunTmpl) {
unsigned Quals;
if (Constructor->isCopyConstructor(Quals)) {
SMKind |= SMF_CopyConstructor;
if (Quals & Qualifiers::Const)
data().HasDeclaredCopyConstructorWithConstParam = true;
} else if (Constructor->isMoveConstructor())
SMKind |= SMF_MoveConstructor;
}
// Record if we see any constexpr constructors which are neither copy
// nor move constructors.
if (Constructor->isConstexpr() && !Constructor->isCopyOrMoveConstructor())
data().HasConstexprNonCopyMoveConstructor = true;
// C++ [dcl.init.aggr]p1:
// An aggregate is an array or a class with no user-declared
// constructors [...].
// C++11 [dcl.init.aggr]p1:
// An aggregate is an array or a class with no user-provided
// constructors [...].
if (getASTContext().getLangOpts().CPlusPlus11
? UserProvided : !Constructor->isImplicit())
data().Aggregate = false;
}
// Handle destructors.
if (CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(D)) {
SMKind |= SMF_Destructor;
if (DD->isUserProvided())
data().HasIrrelevantDestructor = false;
// If the destructor is explicitly defaulted and not trivial or not public
// or if the destructor is deleted, we clear HasIrrelevantDestructor in
// finishedDefaultedOrDeletedMember.
// C++11 [class.dtor]p5:
// A destructor is trivial if [...] the destructor is not virtual.
if (DD->isVirtual())
data().HasTrivialSpecialMembers &= ~SMF_Destructor;
}
// Handle member functions.
if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) {
if (Method->isCopyAssignmentOperator()) {
SMKind |= SMF_CopyAssignment;
const ReferenceType *ParamTy =
Method->getParamDecl(0)->getType()->getAs<ReferenceType>();
if (!ParamTy || ParamTy->getPointeeType().isConstQualified())
data().HasDeclaredCopyAssignmentWithConstParam = true;
}
if (Method->isMoveAssignmentOperator())
SMKind |= SMF_MoveAssignment;
// Keep the list of conversion functions up-to-date.
if (CXXConversionDecl *Conversion = dyn_cast<CXXConversionDecl>(D)) {
// FIXME: We use the 'unsafe' accessor for the access specifier here,
// because Sema may not have set it yet. That's really just a misdesign
// in Sema. However, LLDB *will* have set the access specifier correctly,
// and adds declarations after the class is technically completed,
// so completeDefinition()'s overriding of the access specifiers doesn't
// work.
AccessSpecifier AS = Conversion->getAccessUnsafe();
if (Conversion->getPrimaryTemplate()) {
// We don't record specializations.
} else {
ASTContext &Ctx = getASTContext();
ASTUnresolvedSet &Conversions = data().Conversions.get(Ctx);
NamedDecl *Primary =
FunTmpl ? cast<NamedDecl>(FunTmpl) : cast<NamedDecl>(Conversion);
if (Primary->getPreviousDecl())
Conversions.replace(cast<NamedDecl>(Primary->getPreviousDecl()),
Primary, AS);
else
Conversions.addDecl(Ctx, Primary, AS);
}
}
if (SMKind) {
// If this is the first declaration of a special member, we no longer have
// an implicit trivial special member.
data().HasTrivialSpecialMembers &=
data().DeclaredSpecialMembers | ~SMKind;
if (!Method->isImplicit() && !Method->isUserProvided()) {
// This method is user-declared but not user-provided. We can't work out
// whether it's trivial yet (not until we get to the end of the class).
// We'll handle this method in finishedDefaultedOrDeletedMember.
} else if (Method->isTrivial())
data().HasTrivialSpecialMembers |= SMKind;
else
data().DeclaredNonTrivialSpecialMembers |= SMKind;
// Note when we have declared a declared special member, and suppress the
// implicit declaration of this special member.
data().DeclaredSpecialMembers |= SMKind;
if (!Method->isImplicit()) {
data().UserDeclaredSpecialMembers |= SMKind;
// C++03 [class]p4:
// A POD-struct is an aggregate class that has [...] no user-defined
// copy assignment operator and no user-defined destructor.
//
// Since the POD bit is meant to be C++03 POD-ness, and in C++03,
// aggregates could not have any constructors, clear it even for an
// explicitly defaulted or deleted constructor.
// type is technically an aggregate in C++0x since it wouldn't be in 03.
//
// Also, a user-declared move assignment operator makes a class non-POD.
// This is an extension in C++03.
data().PlainOldData = false;
}
}
return;
}
// Handle non-static data members.
if (FieldDecl *Field = dyn_cast<FieldDecl>(D)) {
// C++ [class.bit]p2:
// A declaration for a bit-field that omits the identifier declares an
// unnamed bit-field. Unnamed bit-fields are not members and cannot be
// initialized.
if (Field->isUnnamedBitfield())
return;
// C++ [dcl.init.aggr]p1:
// An aggregate is an array or a class (clause 9) with [...] no
// private or protected non-static data members (clause 11).
//
// A POD must be an aggregate.
if (D->getAccess() == AS_private || D->getAccess() == AS_protected) {
data().Aggregate = false;
data().PlainOldData = false;
}
// C++0x [class]p7:
// A standard-layout class is a class that:
// [...]
// -- has the same access control for all non-static data members,
switch (D->getAccess()) {
case AS_private: data().HasPrivateFields = true; break;
case AS_protected: data().HasProtectedFields = true; break;
case AS_public: data().HasPublicFields = true; break;
case AS_none: llvm_unreachable("Invalid access specifier");
};
if ((data().HasPrivateFields + data().HasProtectedFields +
data().HasPublicFields) > 1)
data().IsStandardLayout = false;
// Keep track of the presence of mutable fields.
if (Field->isMutable())
data().HasMutableFields = true;
// C++11 [class.union]p8, DR1460:
// If X is a union, a non-static data member of X that is not an anonymous
// union is a variant member of X.
if (isUnion() && !Field->isAnonymousStructOrUnion())
data().HasVariantMembers = true;
// C++0x [class]p9:
// A POD struct is a class that is both a trivial class and a
// standard-layout class, and has no non-static data members of type
// non-POD struct, non-POD union (or array of such types).
//
// Automatic Reference Counting: the presence of a member of Objective-C pointer type
// that does not explicitly have no lifetime makes the class a non-POD.
ASTContext &Context = getASTContext();
QualType T = Context.getBaseElementType(Field->getType());
if (T->isObjCRetainableType() || T.isObjCGCStrong()) {
if (!Context.getLangOpts().ObjCAutoRefCount) {
setHasObjectMember(true);
} else if (T.getObjCLifetime() != Qualifiers::OCL_ExplicitNone) {
// Objective-C Automatic Reference Counting:
// If a class has a non-static data member of Objective-C pointer
// type (or array thereof), it is a non-POD type and its
// default constructor (if any), copy constructor, move constructor,
// copy assignment operator, move assignment operator, and destructor are
// non-trivial.
setHasObjectMember(true);
struct DefinitionData &Data = data();
Data.PlainOldData = false;
Data.HasTrivialSpecialMembers = 0;
Data.HasIrrelevantDestructor = false;
}
} else if (!T.isCXX98PODType(Context))
data().PlainOldData = false;
if (T->isReferenceType()) {
if (!Field->hasInClassInitializer())
data().HasUninitializedReferenceMember = true;
// C++0x [class]p7:
// A standard-layout class is a class that:
// -- has no non-static data members of type [...] reference,
data().IsStandardLayout = false;
}
// Record if this field is the first non-literal or volatile field or base.
if (!T->isLiteralType(Context) || T.isVolatileQualified())
data().HasNonLiteralTypeFieldsOrBases = true;
if (Field->hasInClassInitializer() ||
(Field->isAnonymousStructOrUnion() &&
Field->getType()->getAsCXXRecordDecl()->hasInClassInitializer())) {
data().HasInClassInitializer = true;
// C++11 [class]p5:
// A default constructor is trivial if [...] no non-static data member
// of its class has a brace-or-equal-initializer.
data().HasTrivialSpecialMembers &= ~SMF_DefaultConstructor;
// C++11 [dcl.init.aggr]p1:
// An aggregate is a [...] class with [...] no
// brace-or-equal-initializers for non-static data members.
//
// This rule was removed in C++1y.
if (!getASTContext().getLangOpts().CPlusPlus14)
data().Aggregate = false;
// C++11 [class]p10:
// A POD struct is [...] a trivial class.
data().PlainOldData = false;
}
// C++11 [class.copy]p23:
// A defaulted copy/move assignment operator for a class X is defined
// as deleted if X has:
// -- a non-static data member of reference type
if (T->isReferenceType())
data().DefaultedMoveAssignmentIsDeleted = true;
if (const RecordType *RecordTy = T->getAs<RecordType>()) {
CXXRecordDecl* FieldRec = cast<CXXRecordDecl>(RecordTy->getDecl());
if (FieldRec->getDefinition()) {
addedClassSubobject(FieldRec);
// We may need to perform overload resolution to determine whether a
// field can be moved if it's const or volatile qualified.
if (T.getCVRQualifiers() & (Qualifiers::Const | Qualifiers::Volatile)) {
data().NeedOverloadResolutionForMoveConstructor = true;
data().NeedOverloadResolutionForMoveAssignment = true;
}
// C++11 [class.ctor]p5, C++11 [class.copy]p11:
// A defaulted [special member] for a class X is defined as
// deleted if:
// -- X is a union-like class that has a variant member with a
// non-trivial [corresponding special member]
if (isUnion()) {
if (FieldRec->hasNonTrivialMoveConstructor())
data().DefaultedMoveConstructorIsDeleted = true;
if (FieldRec->hasNonTrivialMoveAssignment())
data().DefaultedMoveAssignmentIsDeleted = true;
if (FieldRec->hasNonTrivialDestructor())
data().DefaultedDestructorIsDeleted = true;
}
// C++0x [class.ctor]p5:
// A default constructor is trivial [...] if:
// -- for all the non-static data members of its class that are of
// class type (or array thereof), each such class has a trivial
// default constructor.
if (!FieldRec->hasTrivialDefaultConstructor())
data().HasTrivialSpecialMembers &= ~SMF_DefaultConstructor;
// C++0x [class.copy]p13:
// A copy/move constructor for class X is trivial if [...]
// [...]
// -- 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;
if (!FieldRec->hasTrivialCopyConstructor())
data().HasTrivialSpecialMembers &= ~SMF_CopyConstructor;
// If the field doesn't have a simple move constructor, we'll eagerly
// declare the move constructor for this class and we'll decide whether
// it's trivial then.
if (!FieldRec->hasTrivialMoveConstructor())
data().HasTrivialSpecialMembers &= ~SMF_MoveConstructor;
// C++0x [class.copy]p27:
// A copy/move assignment operator for class X is trivial if [...]
// [...]
// -- 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;
if (!FieldRec->hasTrivialCopyAssignment())
data().HasTrivialSpecialMembers &= ~SMF_CopyAssignment;
// If the field doesn't have a simple move assignment, we'll eagerly
// declare the move assignment for this class and we'll decide whether
// it's trivial then.
if (!FieldRec->hasTrivialMoveAssignment())
data().HasTrivialSpecialMembers &= ~SMF_MoveAssignment;
if (!FieldRec->hasTrivialDestructor())
data().HasTrivialSpecialMembers &= ~SMF_Destructor;
if (!FieldRec->hasIrrelevantDestructor())
data().HasIrrelevantDestructor = false;
if (FieldRec->hasObjectMember())
setHasObjectMember(true);
if (FieldRec->hasVolatileMember())
setHasVolatileMember(true);
// 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) [...]
if (!FieldRec->isStandardLayout())
data().IsStandardLayout = false;
// C++0x [class]p7:
// A standard-layout class is a class that:
// [...]
// -- has no base classes of the same type as the first non-static
// data member.
// We don't want to expend bits in the state of the record decl
// tracking whether this is the first non-static data member so we
// cheat a bit and use some of the existing state: the empty bit.
// Virtual bases and virtual methods make a class non-empty, but they
// also make it non-standard-layout so we needn't check here.
// A non-empty base class may leave the class standard-layout, but not
// if we have arrived here, and have at least one non-static data
// member. If IsStandardLayout remains true, then the first non-static
// data member must come through here with Empty still true, and Empty
// will subsequently be set to false below.
if (data().IsStandardLayout && data().Empty) {
for (const auto &BI : bases()) {
if (Context.hasSameUnqualifiedType(BI.getType(), T)) {
data().IsStandardLayout = false;
break;
}
}
}
// Keep track of the presence of mutable fields.
if (FieldRec->hasMutableFields())
data().HasMutableFields = true;
// C++11 [class.copy]p13:
// If the implicitly-defined constructor would satisfy the
// requirements of a constexpr constructor, the implicitly-defined
// constructor is constexpr.
// C++11 [dcl.constexpr]p4:
// -- every constructor involved in initializing non-static data
// members [...] shall be a constexpr constructor
if (!Field->hasInClassInitializer() &&
!FieldRec->hasConstexprDefaultConstructor() && !isUnion())
// The standard requires any in-class initializer to be a constant
// expression. We consider this to be a defect.
data().DefaultedDefaultConstructorIsConstexpr = false;
// C++11 [class.copy]p8:
// The implicitly-declared copy constructor for a class X will have
// the form 'X::X(const X&)' if [...] for all the non-static data
// members of X that are of a class type M (or array thereof), each
// such class type has a copy constructor whose first parameter is
// of type 'const M&' or 'const volatile M&'.
if (!FieldRec->hasCopyConstructorWithConstParam())
data().ImplicitCopyConstructorHasConstParam = false;
// C++11 [class.copy]p18:
// The implicitly-declared copy assignment oeprator for a class X will
// have the form 'X& X::operator=(const X&)' if [...] for all the
// non-static data members of X that are of a class type M (or array
// thereof), each such class type has a copy assignment operator whose
// parameter is of type 'const M&', 'const volatile M&' or 'M'.
if (!FieldRec->hasCopyAssignmentWithConstParam())
data().ImplicitCopyAssignmentHasConstParam = false;
if (FieldRec->hasUninitializedReferenceMember() &&
!Field->hasInClassInitializer())
data().HasUninitializedReferenceMember = true;
// C++11 [class.union]p8, DR1460:
// a non-static data member of an anonymous union that is a member of
// X is also a variant member of X.
if (FieldRec->hasVariantMembers() &&
Field->isAnonymousStructOrUnion())
data().HasVariantMembers = true;
}
} else {
// Base element type of field is a non-class type.
if (!T->isLiteralType(Context) ||
(!Field->hasInClassInitializer() && !isUnion()))
data().DefaultedDefaultConstructorIsConstexpr = false;
// C++11 [class.copy]p23:
// A defaulted copy/move assignment operator for a class X is defined
// as deleted if X has:
// -- a non-static data member of const non-class type (or array
// thereof)
if (T.isConstQualified())
data().DefaultedMoveAssignmentIsDeleted = true;
}
// C++0x [class]p7:
// A standard-layout class is a class that:
// [...]
// -- 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
// At this point we know that we have a non-static data member, so the last
// clause holds.
if (!data().HasNoNonEmptyBases)
data().IsStandardLayout = false;
// If this is not a zero-length bit-field, then the class is not empty.
if (data().Empty) {
if (!Field->isBitField() ||
(!Field->getBitWidth()->isTypeDependent() &&
!Field->getBitWidth()->isValueDependent() &&
Field->getBitWidthValue(Context) != 0))
data().Empty = false;
}
}
// Handle using declarations of conversion functions.
if (UsingShadowDecl *Shadow = dyn_cast<UsingShadowDecl>(D)) {
if (Shadow->getDeclName().getNameKind()
== DeclarationName::CXXConversionFunctionName) {
ASTContext &Ctx = getASTContext();
data().Conversions.get(Ctx).addDecl(Ctx, Shadow, Shadow->getAccess());
}
}
}
void CXXRecordDecl::finishedDefaultedOrDeletedMember(CXXMethodDecl *D) {
assert(!D->isImplicit() && !D->isUserProvided());
// The kind of special member this declaration is, if any.
unsigned SMKind = 0;
if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(D)) {
if (Constructor->isDefaultConstructor()) {
SMKind |= SMF_DefaultConstructor;
if (Constructor->isConstexpr())
data().HasConstexprDefaultConstructor = true;
}
if (Constructor->isCopyConstructor())
SMKind |= SMF_CopyConstructor;
else if (Constructor->isMoveConstructor())
SMKind |= SMF_MoveConstructor;
else if (Constructor->isConstexpr())
// We may now know that the constructor is constexpr.
data().HasConstexprNonCopyMoveConstructor = true;
} else if (isa<CXXDestructorDecl>(D)) {
SMKind |= SMF_Destructor;
if (!D->isTrivial() || D->getAccess() != AS_public || D->isDeleted())
data().HasIrrelevantDestructor = false;
} else if (D->isCopyAssignmentOperator())
SMKind |= SMF_CopyAssignment;
else if (D->isMoveAssignmentOperator())
SMKind |= SMF_MoveAssignment;
// Update which trivial / non-trivial special members we have.
// addedMember will have skipped this step for this member.
if (D->isTrivial())
data().HasTrivialSpecialMembers |= SMKind;
else
data().DeclaredNonTrivialSpecialMembers |= SMKind;
}
bool CXXRecordDecl::isCLike() const {
if (getTagKind() == TTK_Class || getTagKind() == TTK_Interface ||
!TemplateOrInstantiation.isNull())
return false;
if (!hasDefinition())
return true;
return isPOD() && data().HasOnlyCMembers;
}
bool CXXRecordDecl::isGenericLambda() const {
if (!isLambda()) return false;
return getLambdaData().IsGenericLambda;
}
CXXMethodDecl* CXXRecordDecl::getLambdaCallOperator() const {
if (!isLambda()) return nullptr;
DeclarationName Name =
getASTContext().DeclarationNames.getCXXOperatorName(OO_Call);
DeclContext::lookup_const_result Calls = lookup(Name);
assert(!Calls.empty() && "Missing lambda call operator!");
assert(Calls.size() == 1 && "More than one lambda call operator!");
NamedDecl *CallOp = Calls.front();
if (FunctionTemplateDecl *CallOpTmpl =
dyn_cast<FunctionTemplateDecl>(CallOp))
return cast<CXXMethodDecl>(CallOpTmpl->getTemplatedDecl());
return cast<CXXMethodDecl>(CallOp);
}
CXXMethodDecl* CXXRecordDecl::getLambdaStaticInvoker() const {
if (!isLambda()) return nullptr;
DeclarationName Name =
&getASTContext().Idents.get(getLambdaStaticInvokerName());
DeclContext::lookup_const_result Invoker = lookup(Name);
if (Invoker.empty()) return nullptr;
assert(Invoker.size() == 1 && "More than one static invoker operator!");
NamedDecl *InvokerFun = Invoker.front();
if (FunctionTemplateDecl *InvokerTemplate =
dyn_cast<FunctionTemplateDecl>(InvokerFun))
return cast<CXXMethodDecl>(InvokerTemplate->getTemplatedDecl());
return cast<CXXMethodDecl>(InvokerFun);
}
void CXXRecordDecl::getCaptureFields(
llvm::DenseMap<const VarDecl *, FieldDecl *> &Captures,
FieldDecl *&ThisCapture) const {
Captures.clear();
ThisCapture = nullptr;
LambdaDefinitionData &Lambda = getLambdaData();
RecordDecl::field_iterator Field = field_begin();
for (const LambdaCapture *C = Lambda.Captures, *CEnd = C + Lambda.NumCaptures;
C != CEnd; ++C, ++Field) {
if (C->capturesThis())
ThisCapture = *Field;
else if (C->capturesVariable())
Captures[C->getCapturedVar()] = *Field;
}
assert(Field == field_end());
}
TemplateParameterList *
CXXRecordDecl::getGenericLambdaTemplateParameterList() const {
if (!isLambda()) return nullptr;
CXXMethodDecl *CallOp = getLambdaCallOperator();
if (FunctionTemplateDecl *Tmpl = CallOp->getDescribedFunctionTemplate())
return Tmpl->getTemplateParameters();
return nullptr;
}
static CanQualType GetConversionType(ASTContext &Context, NamedDecl *Conv) {
QualType T =
cast<CXXConversionDecl>(Conv->getUnderlyingDecl()->getAsFunction())
->getConversionType();
return Context.getCanonicalType(T);
}
/// Collect the visible conversions of a base class.
///
/// \param Record a base class of the class we're considering
/// \param InVirtual whether this base class is a virtual base (or a base
/// of a virtual base)
/// \param Access the access along the inheritance path to this base
/// \param ParentHiddenTypes the conversions provided by the inheritors
/// of this base
/// \param Output the set to which to add conversions from non-virtual bases
/// \param VOutput the set to which to add conversions from virtual bases
/// \param HiddenVBaseCs the set of conversions which were hidden in a
/// virtual base along some inheritance path
static void CollectVisibleConversions(ASTContext &Context,
CXXRecordDecl *Record,
bool InVirtual,
AccessSpecifier Access,
const llvm::SmallPtrSet<CanQualType, 8> &ParentHiddenTypes,
ASTUnresolvedSet &Output,
UnresolvedSetImpl &VOutput,
llvm::SmallPtrSet<NamedDecl*, 8> &HiddenVBaseCs) {
// The set of types which have conversions in this class or its
// subclasses. As an optimization, we don't copy the derived set
// unless it might change.
const llvm::SmallPtrSet<CanQualType, 8> *HiddenTypes = &ParentHiddenTypes;
llvm::SmallPtrSet<CanQualType, 8> HiddenTypesBuffer;
// Collect the direct conversions and figure out which conversions
// will be hidden in the subclasses.
CXXRecordDecl::conversion_iterator ConvI = Record->conversion_begin();
CXXRecordDecl::conversion_iterator ConvE = Record->conversion_end();
if (ConvI != ConvE) {
HiddenTypesBuffer = ParentHiddenTypes;
HiddenTypes = &HiddenTypesBuffer;
for (CXXRecordDecl::conversion_iterator I = ConvI; I != ConvE; ++I) {
CanQualType ConvType(GetConversionType(Context, I.getDecl()));
bool Hidden = ParentHiddenTypes.count(ConvType);
if (!Hidden)
HiddenTypesBuffer.insert(ConvType);
// If this conversion is hidden and we're in a virtual base,
// remember that it's hidden along some inheritance path.
if (Hidden && InVirtual)
HiddenVBaseCs.insert(cast<NamedDecl>(I.getDecl()->getCanonicalDecl()));
// If this conversion isn't hidden, add it to the appropriate output.
else if (!Hidden) {
AccessSpecifier IAccess
= CXXRecordDecl::MergeAccess(Access, I.getAccess());
if (InVirtual)
VOutput.addDecl(I.getDecl(), IAccess);
else
Output.addDecl(Context, I.getDecl(), IAccess);
}
}
}
// Collect information recursively from any base classes.
for (const auto &I : Record->bases()) {
const RecordType *RT = I.getType()->getAs<RecordType>();
if (!RT) continue;
AccessSpecifier BaseAccess
= CXXRecordDecl::MergeAccess(Access, I.getAccessSpecifier());
bool BaseInVirtual = InVirtual || I.isVirtual();
CXXRecordDecl *Base = cast<CXXRecordDecl>(RT->getDecl());
CollectVisibleConversions(Context, Base, BaseInVirtual, BaseAccess,
*HiddenTypes, Output, VOutput, HiddenVBaseCs);
}
}
/// Collect the visible conversions of a class.
///
/// This would be extremely straightforward if it weren't for virtual
/// bases. It might be worth special-casing that, really.
static void CollectVisibleConversions(ASTContext &Context,
CXXRecordDecl *Record,
ASTUnresolvedSet &Output) {
// The collection of all conversions in virtual bases that we've
// found. These will be added to the output as long as they don't
// appear in the hidden-conversions set.
UnresolvedSet<8> VBaseCs;
// The set of conversions in virtual bases that we've determined to
// be hidden.
llvm::SmallPtrSet<NamedDecl*, 8> HiddenVBaseCs;
// The set of types hidden by classes derived from this one.
llvm::SmallPtrSet<CanQualType, 8> HiddenTypes;
// Go ahead and collect the direct conversions and add them to the
// hidden-types set.
CXXRecordDecl::conversion_iterator ConvI = Record->conversion_begin();
CXXRecordDecl::conversion_iterator ConvE = Record->conversion_end();
Output.append(Context, ConvI, ConvE);
for (; ConvI != ConvE; ++ConvI)
HiddenTypes.insert(GetConversionType(Context, ConvI.getDecl()));
// Recursively collect conversions from base classes.
for (const auto &I : Record->bases()) {
const RecordType *RT = I.getType()->getAs<RecordType>();
if (!RT) continue;
CollectVisibleConversions(Context, cast<CXXRecordDecl>(RT->getDecl()),
I.isVirtual(), I.getAccessSpecifier(),
HiddenTypes, Output, VBaseCs, HiddenVBaseCs);
}
// Add any unhidden conversions provided by virtual bases.
for (UnresolvedSetIterator I = VBaseCs.begin(), E = VBaseCs.end();
I != E; ++I) {
if (!HiddenVBaseCs.count(cast<NamedDecl>(I.getDecl()->getCanonicalDecl())))
Output.addDecl(Context, I.getDecl(), I.getAccess());
}
}
/// getVisibleConversionFunctions - get all conversion functions visible
/// in current class; including conversion function templates.
std::pair<CXXRecordDecl::conversion_iterator,CXXRecordDecl::conversion_iterator>
CXXRecordDecl::getVisibleConversionFunctions() {
ASTContext &Ctx = getASTContext();
ASTUnresolvedSet *Set;
if (bases_begin() == bases_end()) {
// If root class, all conversions are visible.
Set = &data().Conversions.get(Ctx);
} else {
Set = &data().VisibleConversions.get(Ctx);
// If visible conversion list is not evaluated, evaluate it.
if (!data().ComputedVisibleConversions) {
CollectVisibleConversions(Ctx, this, *Set);
data().ComputedVisibleConversions = true;
}
}
return std::make_pair(Set->begin(), Set->end());
}
void CXXRecordDecl::removeConversion(const NamedDecl *ConvDecl) {
// This operation is O(N) but extremely rare. Sema only uses it to
// remove UsingShadowDecls in a class that were followed by a direct
// declaration, e.g.:
// class A : B {
// using B::operator int;
// operator int();
// };
// This is uncommon by itself and even more uncommon in conjunction
// with sufficiently large numbers of directly-declared conversions
// that asymptotic behavior matters.
ASTUnresolvedSet &Convs = data().Conversions.get(getASTContext());
for (unsigned I = 0, E = Convs.size(); I != E; ++I) {
if (Convs[I].getDecl() == ConvDecl) {
Convs.erase(I);
assert(std::find(Convs.begin(), Convs.end(), ConvDecl) == Convs.end()
&& "conversion was found multiple times in unresolved set");
return;
}
}
llvm_unreachable("conversion not found in set!");
}
CXXRecordDecl *CXXRecordDecl::getInstantiatedFromMemberClass() const {
if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo())
return cast<CXXRecordDecl>(MSInfo->getInstantiatedFrom());
return nullptr;
}
void
CXXRecordDecl::setInstantiationOfMemberClass(CXXRecordDecl *RD,
TemplateSpecializationKind TSK) {
assert(TemplateOrInstantiation.isNull() &&
"Previous template or instantiation?");
assert(!isa<ClassTemplatePartialSpecializationDecl>(this));
TemplateOrInstantiation
= new (getASTContext()) MemberSpecializationInfo(RD, TSK);
}
TemplateSpecializationKind CXXRecordDecl::getTemplateSpecializationKind() const{
if (const ClassTemplateSpecializationDecl *Spec
= dyn_cast<ClassTemplateSpecializationDecl>(this))
return Spec->getSpecializationKind();
if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo())
return MSInfo->getTemplateSpecializationKind();
return TSK_Undeclared;
}
void
CXXRecordDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK) {
if (ClassTemplateSpecializationDecl *Spec
= dyn_cast<ClassTemplateSpecializationDecl>(this)) {
Spec->setSpecializationKind(TSK);
return;
}
if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo()) {
MSInfo->setTemplateSpecializationKind(TSK);
return;
}
llvm_unreachable("Not a class template or member class specialization");
}
const CXXRecordDecl *CXXRecordDecl::getTemplateInstantiationPattern() const {
// If it's a class template specialization, find the template or partial
// specialization from which it was instantiated.
if (auto *TD = dyn_cast<ClassTemplateSpecializationDecl>(this)) {
auto From = TD->getInstantiatedFrom();
if (auto *CTD = From.dyn_cast<ClassTemplateDecl *>()) {
while (auto *NewCTD = CTD->getInstantiatedFromMemberTemplate()) {
if (NewCTD->isMemberSpecialization())
break;
CTD = NewCTD;
}
return CTD->getTemplatedDecl();
}
if (auto *CTPSD =
From.dyn_cast<ClassTemplatePartialSpecializationDecl *>()) {
while (auto *NewCTPSD = CTPSD->getInstantiatedFromMember()) {
if (NewCTPSD->isMemberSpecialization())
break;
CTPSD = NewCTPSD;
}
return CTPSD;
}
}
if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo()) {
if (isTemplateInstantiation(MSInfo->getTemplateSpecializationKind())) {
const CXXRecordDecl *RD = this;
while (auto *NewRD = RD->getInstantiatedFromMemberClass())
RD = NewRD;
return RD;
}
}
assert(!isTemplateInstantiation(this->getTemplateSpecializationKind()) &&
"couldn't find pattern for class template instantiation");
return nullptr;
}
CXXDestructorDecl *CXXRecordDecl::getDestructor() const {
ASTContext &Context = getASTContext();
QualType ClassType = Context.getTypeDeclType(this);
DeclarationName Name
= Context.DeclarationNames.getCXXDestructorName(
Context.getCanonicalType(ClassType));
DeclContext::lookup_const_result R = lookup(Name);
if (R.empty())
return nullptr;
CXXDestructorDecl *Dtor = cast<CXXDestructorDecl>(R.front());
return Dtor;
}
void CXXRecordDecl::completeDefinition() {
completeDefinition(nullptr);
}
void CXXRecordDecl::completeDefinition(CXXFinalOverriderMap *FinalOverriders) {
RecordDecl::completeDefinition();
// If the class may be abstract (but hasn't been marked as such), check for
// any pure final overriders.
if (mayBeAbstract()) {
CXXFinalOverriderMap MyFinalOverriders;
if (!FinalOverriders) {
getFinalOverriders(MyFinalOverriders);
FinalOverriders = &MyFinalOverriders;
}
bool Done = false;
for (CXXFinalOverriderMap::iterator M = FinalOverriders->begin(),
MEnd = FinalOverriders->end();
M != MEnd && !Done; ++M) {
for (OverridingMethods::iterator SO = M->second.begin(),
SOEnd = M->second.end();
SO != SOEnd && !Done; ++SO) {
assert(SO->second.size() > 0 &&
"All virtual functions have overridding virtual functions");
// C++ [class.abstract]p4:
// A class is abstract if it contains or inherits at least one
// pure virtual function for which the final overrider is pure
// virtual.
if (SO->second.front().Method->isPure()) {
data().Abstract = true;
Done = true;
break;
}
}
}
}
// Set access bits correctly on the directly-declared conversions.
for (conversion_iterator I = conversion_begin(), E = conversion_end();
I != E; ++I)
I.setAccess((*I)->getAccess());
}
bool CXXRecordDecl::mayBeAbstract() const {
if (data().Abstract || isInvalidDecl() || !data().Polymorphic ||
isDependentContext())
return false;
for (const auto &B : bases()) {
CXXRecordDecl *BaseDecl
= cast<CXXRecordDecl>(B.getType()->getAs<RecordType>()->getDecl());
if (BaseDecl->isAbstract())
return true;
}
return false;
}
void CXXMethodDecl::anchor() { }
bool CXXMethodDecl::isStatic() const {
const CXXMethodDecl *MD = getCanonicalDecl();
if (MD->getStorageClass() == SC_Static)
return true;
OverloadedOperatorKind OOK = getDeclName().getCXXOverloadedOperator();
return isStaticOverloadedOperator(OOK);
}
static bool recursivelyOverrides(const CXXMethodDecl *DerivedMD,
const CXXMethodDecl *BaseMD) {
for (CXXMethodDecl::method_iterator I = DerivedMD->begin_overridden_methods(),
E = DerivedMD->end_overridden_methods(); I != E; ++I) {
const CXXMethodDecl *MD = *I;
if (MD->getCanonicalDecl() == BaseMD->getCanonicalDecl())
return true;
if (recursivelyOverrides(MD, BaseMD))
return true;
}
return false;
}
CXXMethodDecl *
CXXMethodDecl::getCorrespondingMethodInClass(const CXXRecordDecl *RD,
bool MayBeBase) {
if (this->getParent()->getCanonicalDecl() == RD->getCanonicalDecl())
return this;
// Lookup doesn't work for destructors, so handle them separately.
if (isa<CXXDestructorDecl>(this)) {
CXXMethodDecl *MD = RD->getDestructor();
if (MD) {
if (recursivelyOverrides(MD, this))
return MD;
if (MayBeBase && recursivelyOverrides(this, MD))
return MD;
}
return nullptr;
}
lookup_const_result Candidates = RD->lookup(getDeclName());
for (NamedDecl * const * I = Candidates.begin(); I != Candidates.end(); ++I) {
CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(*I);
if (!MD)
continue;
if (recursivelyOverrides(MD, this))
return MD;
if (MayBeBase && recursivelyOverrides(this, MD))
return MD;
}
for (const auto &I : RD->bases()) {
const RecordType *RT = I.getType()->getAs<RecordType>();
if (!RT)
continue;
const CXXRecordDecl *Base = cast<CXXRecordDecl>(RT->getDecl());
CXXMethodDecl *T = this->getCorrespondingMethodInClass(Base);
if (T)
return T;
}
return nullptr;
}
CXXMethodDecl *
CXXMethodDecl::Create(ASTContext &C, CXXRecordDecl *RD,
SourceLocation StartLoc,
const DeclarationNameInfo &NameInfo,
QualType T, TypeSourceInfo *TInfo,
StorageClass SC, bool isInline,
bool isConstexpr, SourceLocation EndLocation) {
return new (C, RD) CXXMethodDecl(CXXMethod, C, RD, StartLoc, NameInfo,
T, TInfo, SC, isInline, isConstexpr,
EndLocation);
}
CXXMethodDecl *CXXMethodDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) CXXMethodDecl(CXXMethod, C, nullptr, SourceLocation(),
DeclarationNameInfo(), QualType(), nullptr,
SC_None, false, false, SourceLocation());
}
bool CXXMethodDecl::isUsualDeallocationFunction() const {
if (getOverloadedOperator() != OO_Delete &&
getOverloadedOperator() != OO_Array_Delete)
return false;
// C++ [basic.stc.dynamic.deallocation]p2:
// A template instance is never a usual deallocation function,
// regardless of its signature.
if (getPrimaryTemplate())
return false;
// C++ [basic.stc.dynamic.deallocation]p2:
// If a class T has a member deallocation function named operator delete
// with exactly one parameter, then that function is a usual (non-placement)
// deallocation function. [...]
if (getNumParams() == 1)
return true;
// C++ [basic.stc.dynamic.deallocation]p2:
// [...] If class T does not declare such an operator delete but does
// declare a member deallocation function named operator delete with
// exactly two parameters, the second of which has type std::size_t (18.1),
// then this function is a usual deallocation function.
ASTContext &Context = getASTContext();
if (getNumParams() != 2 ||
!Context.hasSameUnqualifiedType(getParamDecl(1)->getType(),
Context.getSizeType()))
return false;
// This function is a usual deallocation function if there are no
// single-parameter deallocation functions of the same kind.
DeclContext::lookup_const_result R = getDeclContext()->lookup(getDeclName());
for (DeclContext::lookup_const_result::iterator I = R.begin(), E = R.end();
I != E; ++I) {
if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(*I))
if (FD->getNumParams() == 1)
return false;
}
return true;
}
bool CXXMethodDecl::isCopyAssignmentOperator() const {
// C++0x [class.copy]p17:
// A user-declared copy assignment operator X::operator= is a non-static
// non-template member function of class X with exactly one parameter of
// type X, X&, const X&, volatile X& or const volatile X&.
if (/*operator=*/getOverloadedOperator() != OO_Equal ||
/*non-static*/ isStatic() ||
/*non-template*/getPrimaryTemplate() || getDescribedFunctionTemplate() ||
getNumParams() != 1)
return false;
QualType ParamType = getParamDecl(0)->getType();
if (const LValueReferenceType *Ref = ParamType->getAs<LValueReferenceType>())
ParamType = Ref->getPointeeType();
ASTContext &Context = getASTContext();
QualType ClassType
= Context.getCanonicalType(Context.getTypeDeclType(getParent()));
return Context.hasSameUnqualifiedType(ClassType, ParamType);
}
bool CXXMethodDecl::isMoveAssignmentOperator() const {
// C++0x [class.copy]p19:
// A user-declared move assignment operator X::operator= is a non-static
// non-template member function of class X with exactly one parameter of type
// X&&, const X&&, volatile X&&, or const volatile X&&.
if (getOverloadedOperator() != OO_Equal || isStatic() ||
getPrimaryTemplate() || getDescribedFunctionTemplate() ||
getNumParams() != 1)
return false;
QualType ParamType = getParamDecl(0)->getType();
if (!isa<RValueReferenceType>(ParamType))
return false;
ParamType = ParamType->getPointeeType();
ASTContext &Context = getASTContext();
QualType ClassType
= Context.getCanonicalType(Context.getTypeDeclType(getParent()));
return Context.hasSameUnqualifiedType(ClassType, ParamType);
}
void CXXMethodDecl::addOverriddenMethod(const CXXMethodDecl *MD) {
assert(MD->isCanonicalDecl() && "Method is not canonical!");
assert(!MD->getParent()->isDependentContext() &&
"Can't add an overridden method to a class template!");
assert(MD->isVirtual() && "Method is not virtual!");
getASTContext().addOverriddenMethod(this, MD);
}
CXXMethodDecl::method_iterator CXXMethodDecl::begin_overridden_methods() const {
if (isa<CXXConstructorDecl>(this)) return nullptr;
return getASTContext().overridden_methods_begin(this);
}
CXXMethodDecl::method_iterator CXXMethodDecl::end_overridden_methods() const {
if (isa<CXXConstructorDecl>(this)) return nullptr;
return getASTContext().overridden_methods_end(this);
}
unsigned CXXMethodDecl::size_overridden_methods() const {
if (isa<CXXConstructorDecl>(this)) return 0;
return getASTContext().overridden_methods_size(this);
}
QualType CXXMethodDecl::getThisType(ASTContext &C) const {
// C++ 9.3.2p1: The type of this in a member function of a class X is X*.
// If the member function is declared const, the type of this is const X*,
// if the member function is declared volatile, the type of this is
// volatile X*, and if the member function is declared const volatile,
// the type of this is const volatile X*.
assert(isInstance() && "No 'this' for static methods!");
QualType ClassTy = C.getTypeDeclType(getParent());
ClassTy = C.getQualifiedType(ClassTy,
Qualifiers::fromCVRMask(getTypeQualifiers()));
return C.getPointerType(ClassTy);
}
bool CXXMethodDecl::hasInlineBody() const {
// If this function is a template instantiation, look at the template from
// which it was instantiated.
const FunctionDecl *CheckFn = getTemplateInstantiationPattern();
if (!CheckFn)
CheckFn = this;
const FunctionDecl *fn;
return CheckFn->hasBody(fn) && !fn->isOutOfLine();
}
bool CXXMethodDecl::isLambdaStaticInvoker() const {
const CXXRecordDecl *P = getParent();
if (P->isLambda()) {
if (const CXXMethodDecl *StaticInvoker = P->getLambdaStaticInvoker()) {
if (StaticInvoker == this) return true;
if (P->isGenericLambda() && this->isFunctionTemplateSpecialization())
return StaticInvoker == this->getPrimaryTemplate()->getTemplatedDecl();
}
}
return false;
}
CXXCtorInitializer::CXXCtorInitializer(ASTContext &Context,
TypeSourceInfo *TInfo, bool IsVirtual,
SourceLocation L, Expr *Init,
SourceLocation R,
SourceLocation EllipsisLoc)
: Initializee(TInfo), MemberOrEllipsisLocation(EllipsisLoc), Init(Init),
LParenLoc(L), RParenLoc(R), IsDelegating(false), IsVirtual(IsVirtual),
IsWritten(false), SourceOrderOrNumArrayIndices(0)
{
}
CXXCtorInitializer::CXXCtorInitializer(ASTContext &Context,
FieldDecl *Member,
SourceLocation MemberLoc,
SourceLocation L, Expr *Init,
SourceLocation R)
: Initializee(Member), MemberOrEllipsisLocation(MemberLoc), Init(Init),
LParenLoc(L), RParenLoc(R), IsDelegating(false), IsVirtual(false),
IsWritten(false), SourceOrderOrNumArrayIndices(0)
{
}
CXXCtorInitializer::CXXCtorInitializer(ASTContext &Context,
IndirectFieldDecl *Member,
SourceLocation MemberLoc,
SourceLocation L, Expr *Init,
SourceLocation R)
: Initializee(Member), MemberOrEllipsisLocation(MemberLoc), Init(Init),
LParenLoc(L), RParenLoc(R), IsDelegating(false), IsVirtual(false),
IsWritten(false), SourceOrderOrNumArrayIndices(0)
{
}
CXXCtorInitializer::CXXCtorInitializer(ASTContext &Context,
TypeSourceInfo *TInfo,
SourceLocation L, Expr *Init,
SourceLocation R)
: Initializee(TInfo), MemberOrEllipsisLocation(), Init(Init),
LParenLoc(L), RParenLoc(R), IsDelegating(true), IsVirtual(false),
IsWritten(false), SourceOrderOrNumArrayIndices(0)
{
}
CXXCtorInitializer::CXXCtorInitializer(ASTContext &Context,
FieldDecl *Member,
SourceLocation MemberLoc,
SourceLocation L, Expr *Init,
SourceLocation R,
VarDecl **Indices,
unsigned NumIndices)
: Initializee(Member), MemberOrEllipsisLocation(MemberLoc), Init(Init),
LParenLoc(L), RParenLoc(R), IsDelegating(false), IsVirtual(false),
IsWritten(false), SourceOrderOrNumArrayIndices(NumIndices)
{
VarDecl **MyIndices = reinterpret_cast<VarDecl **> (this + 1);
memcpy(MyIndices, Indices, NumIndices * sizeof(VarDecl *));
}
CXXCtorInitializer *CXXCtorInitializer::Create(ASTContext &Context,
FieldDecl *Member,
SourceLocation MemberLoc,
SourceLocation L, Expr *Init,
SourceLocation R,
VarDecl **Indices,
unsigned NumIndices) {
void *Mem = Context.Allocate(sizeof(CXXCtorInitializer) +
sizeof(VarDecl *) * NumIndices,
llvm::alignOf<CXXCtorInitializer>());
return new (Mem) CXXCtorInitializer(Context, Member, MemberLoc, L, Init, R,
Indices, NumIndices);
}
TypeLoc CXXCtorInitializer::getBaseClassLoc() const {
if (isBaseInitializer())
return Initializee.get<TypeSourceInfo*>()->getTypeLoc();
else
return TypeLoc();
}
const Type *CXXCtorInitializer::getBaseClass() const {
if (isBaseInitializer())
return Initializee.get<TypeSourceInfo*>()->getType().getTypePtr();
else
return nullptr;
}
SourceLocation CXXCtorInitializer::getSourceLocation() const {
if (isAnyMemberInitializer())
return getMemberLocation();
if (isInClassMemberInitializer())
return getAnyMember()->getLocation();
if (TypeSourceInfo *TSInfo = Initializee.get<TypeSourceInfo*>())
return TSInfo->getTypeLoc().getLocalSourceRange().getBegin();
return SourceLocation();
}
SourceRange CXXCtorInitializer::getSourceRange() const {
if (isInClassMemberInitializer()) {
FieldDecl *D = getAnyMember();
if (Expr *I = D->getInClassInitializer())
return I->getSourceRange();
return SourceRange();
}
return SourceRange(getSourceLocation(), getRParenLoc());
}
void CXXConstructorDecl::anchor() { }
CXXConstructorDecl *
CXXConstructorDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) CXXConstructorDecl(C, nullptr, SourceLocation(),
DeclarationNameInfo(), QualType(),
nullptr, false, false, false, false);
}
CXXConstructorDecl *
CXXConstructorDecl::Create(ASTContext &C, CXXRecordDecl *RD,
SourceLocation StartLoc,
const DeclarationNameInfo &NameInfo,
QualType T, TypeSourceInfo *TInfo,
bool isExplicit, bool isInline,
bool isImplicitlyDeclared, bool isConstexpr) {
assert(NameInfo.getName().getNameKind()
== DeclarationName::CXXConstructorName &&
"Name must refer to a constructor");
return new (C, RD) CXXConstructorDecl(C, RD, StartLoc, NameInfo, T, TInfo,
isExplicit, isInline,
isImplicitlyDeclared, isConstexpr);
}
CXXConstructorDecl *CXXConstructorDecl::getTargetConstructor() const {
assert(isDelegatingConstructor() && "Not a delegating constructor!");
Expr *E = (*init_begin())->getInit()->IgnoreImplicit();
if (CXXConstructExpr *Construct = dyn_cast<CXXConstructExpr>(E))
return Construct->getConstructor();
return nullptr;
}
bool CXXConstructorDecl::isDefaultConstructor() const {
// C++ [class.ctor]p5:
// A default constructor for a class X is a constructor of class
// X that can be called without an argument.
return (getNumParams() == 0) ||
(getNumParams() > 0 && getParamDecl(0)->hasDefaultArg());
}
bool
CXXConstructorDecl::isCopyConstructor(unsigned &TypeQuals) const {
return isCopyOrMoveConstructor(TypeQuals) &&
getParamDecl(0)->getType()->isLValueReferenceType();
}
bool CXXConstructorDecl::isMoveConstructor(unsigned &TypeQuals) const {
return isCopyOrMoveConstructor(TypeQuals) &&
getParamDecl(0)->getType()->isRValueReferenceType();
}
/// \brief Determine whether this is a copy or move constructor.
bool CXXConstructorDecl::isCopyOrMoveConstructor(unsigned &TypeQuals) const {
// C++ [class.copy]p2:
// A non-template constructor for class X is a copy constructor
// if its first parameter is of type X&, const X&, volatile X& or
// const volatile X&, and either there are no other parameters
// or else all other parameters have default arguments (8.3.6).
// C++0x [class.copy]p3:
// A non-template constructor for class X is a move constructor if its
// first parameter is of type X&&, const X&&, volatile X&&, or
// const volatile X&&, and either there are no other parameters or else
// all other parameters have default arguments.
if ((getNumParams() < 1) ||
(getNumParams() > 1 && !getParamDecl(1)->hasDefaultArg()) ||
(getPrimaryTemplate() != nullptr) ||
(getDescribedFunctionTemplate() != nullptr))
return false;
const ParmVarDecl *Param = getParamDecl(0);
// Do we have a reference type?
const ReferenceType *ParamRefType = Param->getType()->getAs<ReferenceType>();
if (!ParamRefType)
return false;
// Is it a reference to our class type?
ASTContext &Context = getASTContext();
CanQualType PointeeType
= Context.getCanonicalType(ParamRefType->getPointeeType());
CanQualType ClassTy
= Context.getCanonicalType(Context.getTagDeclType(getParent()));
if (PointeeType.getUnqualifiedType() != ClassTy)
return false;
// FIXME: other qualifiers?
// We have a copy or move constructor.
TypeQuals = PointeeType.getCVRQualifiers();
return true;
}
bool CXXConstructorDecl::isConvertingConstructor(bool AllowExplicit) const {
// C++ [class.conv.ctor]p1:
// A constructor declared without the function-specifier explicit
// that can be called with a single parameter specifies a
// conversion from the type of its first parameter to the type of
// its class. Such a constructor is called a converting
// constructor.
if (isExplicit() && !AllowExplicit)
return false;
return (getNumParams() == 0 &&
getType()->getAs<FunctionProtoType>()->isVariadic()) ||
(getNumParams() == 1) ||
(getNumParams() > 1 &&
(getParamDecl(1)->hasDefaultArg() ||
getParamDecl(1)->isParameterPack()));
}
bool CXXConstructorDecl::isSpecializationCopyingObject() const {
if ((getNumParams() < 1) ||
(getNumParams() > 1 && !getParamDecl(1)->hasDefaultArg()) ||
(getDescribedFunctionTemplate() != nullptr))
return false;
const ParmVarDecl *Param = getParamDecl(0);
ASTContext &Context = getASTContext();
CanQualType ParamType = Context.getCanonicalType(Param->getType());
// Is it the same as our our class type?
CanQualType ClassTy
= Context.getCanonicalType(Context.getTagDeclType(getParent()));
if (ParamType.getUnqualifiedType() != ClassTy)
return false;
return true;
}
const CXXConstructorDecl *CXXConstructorDecl::getInheritedConstructor() const {
// Hack: we store the inherited constructor in the overridden method table
method_iterator It = getASTContext().overridden_methods_begin(this);
if (It == getASTContext().overridden_methods_end(this))
return nullptr;
return cast<CXXConstructorDecl>(*It);
}
void
CXXConstructorDecl::setInheritedConstructor(const CXXConstructorDecl *BaseCtor){
// Hack: we store the inherited constructor in the overridden method table
assert(getASTContext().overridden_methods_size(this) == 0 &&
"Base ctor already set.");
getASTContext().addOverriddenMethod(this, BaseCtor);
}
void CXXDestructorDecl::anchor() { }
CXXDestructorDecl *
CXXDestructorDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID)
CXXDestructorDecl(C, nullptr, SourceLocation(), DeclarationNameInfo(),
QualType(), nullptr, false, false);
}
CXXDestructorDecl *
CXXDestructorDecl::Create(ASTContext &C, CXXRecordDecl *RD,
SourceLocation StartLoc,
const DeclarationNameInfo &NameInfo,
QualType T, TypeSourceInfo *TInfo,
bool isInline, bool isImplicitlyDeclared) {
assert(NameInfo.getName().getNameKind()
== DeclarationName::CXXDestructorName &&
"Name must refer to a destructor");
return new (C, RD) CXXDestructorDecl(C, RD, StartLoc, NameInfo, T, TInfo,
isInline, isImplicitlyDeclared);
}
void CXXConversionDecl::anchor() { }
CXXConversionDecl *
CXXConversionDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) CXXConversionDecl(C, nullptr, SourceLocation(),
DeclarationNameInfo(), QualType(),
nullptr, false, false, false,
SourceLocation());
}
CXXConversionDecl *
CXXConversionDecl::Create(ASTContext &C, CXXRecordDecl *RD,
SourceLocation StartLoc,
const DeclarationNameInfo &NameInfo,
QualType T, TypeSourceInfo *TInfo,
bool isInline, bool isExplicit,
bool isConstexpr, SourceLocation EndLocation) {
assert(NameInfo.getName().getNameKind()
== DeclarationName::CXXConversionFunctionName &&
"Name must refer to a conversion function");
return new (C, RD) CXXConversionDecl(C, RD, StartLoc, NameInfo, T, TInfo,
isInline, isExplicit, isConstexpr,
EndLocation);
}
bool CXXConversionDecl::isLambdaToBlockPointerConversion() const {
return isImplicit() && getParent()->isLambda() &&
getConversionType()->isBlockPointerType();
}
void LinkageSpecDecl::anchor() { }
LinkageSpecDecl *LinkageSpecDecl::Create(ASTContext &C,
DeclContext *DC,
SourceLocation ExternLoc,
SourceLocation LangLoc,
LanguageIDs Lang,
bool HasBraces) {
return new (C, DC) LinkageSpecDecl(DC, ExternLoc, LangLoc, Lang, HasBraces);
}
LinkageSpecDecl *LinkageSpecDecl::CreateDeserialized(ASTContext &C,
unsigned ID) {
return new (C, ID) LinkageSpecDecl(nullptr, SourceLocation(),
SourceLocation(), lang_c, false);
}
void UsingDirectiveDecl::anchor() { }
UsingDirectiveDecl *UsingDirectiveDecl::Create(ASTContext &C, DeclContext *DC,
SourceLocation L,
SourceLocation NamespaceLoc,
NestedNameSpecifierLoc QualifierLoc,
SourceLocation IdentLoc,
NamedDecl *Used,
DeclContext *CommonAncestor) {
if (NamespaceDecl *NS = dyn_cast_or_null<NamespaceDecl>(Used))
Used = NS->getOriginalNamespace();
return new (C, DC) UsingDirectiveDecl(DC, L, NamespaceLoc, QualifierLoc,
IdentLoc, Used, CommonAncestor);
}
UsingDirectiveDecl *UsingDirectiveDecl::CreateDeserialized(ASTContext &C,
unsigned ID) {
return new (C, ID) UsingDirectiveDecl(nullptr, SourceLocation(),
SourceLocation(),
NestedNameSpecifierLoc(),
SourceLocation(), nullptr, nullptr);
}
NamespaceDecl *UsingDirectiveDecl::getNominatedNamespace() {
if (NamespaceAliasDecl *NA =
dyn_cast_or_null<NamespaceAliasDecl>(NominatedNamespace))
return NA->getNamespace();
return cast_or_null<NamespaceDecl>(NominatedNamespace);
}
NamespaceDecl::NamespaceDecl(ASTContext &C, DeclContext *DC, bool Inline,
SourceLocation StartLoc, SourceLocation IdLoc,
IdentifierInfo *Id, NamespaceDecl *PrevDecl)
: NamedDecl(Namespace, DC, IdLoc, Id), DeclContext(Namespace),
redeclarable_base(C), LocStart(StartLoc), RBraceLoc(),
AnonOrFirstNamespaceAndInline(nullptr, Inline) {
setPreviousDecl(PrevDecl);
if (PrevDecl)
AnonOrFirstNamespaceAndInline.setPointer(PrevDecl->getOriginalNamespace());
}
NamespaceDecl *NamespaceDecl::Create(ASTContext &C, DeclContext *DC,
bool Inline, SourceLocation StartLoc,
SourceLocation IdLoc, IdentifierInfo *Id,
NamespaceDecl *PrevDecl) {
return new (C, DC) NamespaceDecl(C, DC, Inline, StartLoc, IdLoc, Id,
PrevDecl);
}
NamespaceDecl *NamespaceDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) NamespaceDecl(C, nullptr, false, SourceLocation(),
SourceLocation(), nullptr, nullptr);
}
NamespaceDecl *NamespaceDecl::getNextRedeclarationImpl() {
return getNextRedeclaration();
}
NamespaceDecl *NamespaceDecl::getPreviousDeclImpl() {
return getPreviousDecl();
}
NamespaceDecl *NamespaceDecl::getMostRecentDeclImpl() {
return getMostRecentDecl();
}
void NamespaceAliasDecl::anchor() { }
NamespaceAliasDecl *NamespaceAliasDecl::getNextRedeclarationImpl() {
return getNextRedeclaration();
}
NamespaceAliasDecl *NamespaceAliasDecl::getPreviousDeclImpl() {
return getPreviousDecl();
}
NamespaceAliasDecl *NamespaceAliasDecl::getMostRecentDeclImpl() {
return getMostRecentDecl();
}
NamespaceAliasDecl *NamespaceAliasDecl::Create(ASTContext &C, DeclContext *DC,
SourceLocation UsingLoc,
SourceLocation AliasLoc,
IdentifierInfo *Alias,
NestedNameSpecifierLoc QualifierLoc,
SourceLocation IdentLoc,
NamedDecl *Namespace) {
// FIXME: Preserve the aliased namespace as written.
if (NamespaceDecl *NS = dyn_cast_or_null<NamespaceDecl>(Namespace))
Namespace = NS->getOriginalNamespace();
return new (C, DC) NamespaceAliasDecl(C, DC, UsingLoc, AliasLoc, Alias,
QualifierLoc, IdentLoc, Namespace);
}
NamespaceAliasDecl *
NamespaceAliasDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) NamespaceAliasDecl(C, nullptr, SourceLocation(),
SourceLocation(), nullptr,
NestedNameSpecifierLoc(),
SourceLocation(), nullptr);
}
void UsingShadowDecl::anchor() { }
UsingShadowDecl *
UsingShadowDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) UsingShadowDecl(C, nullptr, SourceLocation(),
nullptr, nullptr);
}
UsingDecl *UsingShadowDecl::getUsingDecl() const {
const UsingShadowDecl *Shadow = this;
while (const UsingShadowDecl *NextShadow =
dyn_cast<UsingShadowDecl>(Shadow->UsingOrNextShadow))
Shadow = NextShadow;
return cast<UsingDecl>(Shadow->UsingOrNextShadow);
}
void UsingDecl::anchor() { }
void UsingDecl::addShadowDecl(UsingShadowDecl *S) {
assert(std::find(shadow_begin(), shadow_end(), S) == shadow_end() &&
"declaration already in set");
assert(S->getUsingDecl() == this);
if (FirstUsingShadow.getPointer())
S->UsingOrNextShadow = FirstUsingShadow.getPointer();
FirstUsingShadow.setPointer(S);
}
void UsingDecl::removeShadowDecl(UsingShadowDecl *S) {
assert(std::find(shadow_begin(), shadow_end(), S) != shadow_end() &&
"declaration not in set");
assert(S->getUsingDecl() == this);
// Remove S from the shadow decl chain. This is O(n) but hopefully rare.
if (FirstUsingShadow.getPointer() == S) {
FirstUsingShadow.setPointer(
dyn_cast<UsingShadowDecl>(S->UsingOrNextShadow));
S->UsingOrNextShadow = this;
return;
}
UsingShadowDecl *Prev = FirstUsingShadow.getPointer();
while (Prev->UsingOrNextShadow != S)
Prev = cast<UsingShadowDecl>(Prev->UsingOrNextShadow);
Prev->UsingOrNextShadow = S->UsingOrNextShadow;
S->UsingOrNextShadow = this;
}
UsingDecl *UsingDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation UL,
NestedNameSpecifierLoc QualifierLoc,
const DeclarationNameInfo &NameInfo,
bool HasTypename) {
return new (C, DC) UsingDecl(DC, UL, QualifierLoc, NameInfo, HasTypename);
}
UsingDecl *UsingDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) UsingDecl(nullptr, SourceLocation(),
NestedNameSpecifierLoc(), DeclarationNameInfo(),
false);
}
SourceRange UsingDecl::getSourceRange() const {
SourceLocation Begin = isAccessDeclaration()
? getQualifierLoc().getBeginLoc() : UsingLocation;
return SourceRange(Begin, getNameInfo().getEndLoc());
}
void UnresolvedUsingValueDecl::anchor() { }
UnresolvedUsingValueDecl *
UnresolvedUsingValueDecl::Create(ASTContext &C, DeclContext *DC,
SourceLocation UsingLoc,
NestedNameSpecifierLoc QualifierLoc,
const DeclarationNameInfo &NameInfo) {
return new (C, DC) UnresolvedUsingValueDecl(DC, C.DependentTy, UsingLoc,
QualifierLoc, NameInfo);
}
UnresolvedUsingValueDecl *
UnresolvedUsingValueDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) UnresolvedUsingValueDecl(nullptr, QualType(),
SourceLocation(),
NestedNameSpecifierLoc(),
DeclarationNameInfo());
}
SourceRange UnresolvedUsingValueDecl::getSourceRange() const {
SourceLocation Begin = isAccessDeclaration()
? getQualifierLoc().getBeginLoc() : UsingLocation;
return SourceRange(Begin, getNameInfo().getEndLoc());
}
void UnresolvedUsingTypenameDecl::anchor() { }
UnresolvedUsingTypenameDecl *
UnresolvedUsingTypenameDecl::Create(ASTContext &C, DeclContext *DC,
SourceLocation UsingLoc,
SourceLocation TypenameLoc,
NestedNameSpecifierLoc QualifierLoc,
SourceLocation TargetNameLoc,
DeclarationName TargetName) {
return new (C, DC) UnresolvedUsingTypenameDecl(
DC, UsingLoc, TypenameLoc, QualifierLoc, TargetNameLoc,
TargetName.getAsIdentifierInfo());
}
UnresolvedUsingTypenameDecl *
UnresolvedUsingTypenameDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) UnresolvedUsingTypenameDecl(
nullptr, SourceLocation(), SourceLocation(), NestedNameSpecifierLoc(),
SourceLocation(), nullptr);
}
void StaticAssertDecl::anchor() { }
StaticAssertDecl *StaticAssertDecl::Create(ASTContext &C, DeclContext *DC,
SourceLocation StaticAssertLoc,
Expr *AssertExpr,
StringLiteral *Message,
SourceLocation RParenLoc,
bool Failed) {
return new (C, DC) StaticAssertDecl(DC, StaticAssertLoc, AssertExpr, Message,
RParenLoc, Failed);
}
StaticAssertDecl *StaticAssertDecl::CreateDeserialized(ASTContext &C,
unsigned ID) {
return new (C, ID) StaticAssertDecl(nullptr, SourceLocation(), nullptr,
nullptr, SourceLocation(), false);
}
MSPropertyDecl *MSPropertyDecl::Create(ASTContext &C, DeclContext *DC,
SourceLocation L, DeclarationName N,
QualType T, TypeSourceInfo *TInfo,
SourceLocation StartL,
IdentifierInfo *Getter,
IdentifierInfo *Setter) {
return new (C, DC) MSPropertyDecl(DC, L, N, T, TInfo, StartL, Getter, Setter);
}
MSPropertyDecl *MSPropertyDecl::CreateDeserialized(ASTContext &C,
unsigned ID) {
return new (C, ID) MSPropertyDecl(nullptr, SourceLocation(),
DeclarationName(), QualType(), nullptr,
SourceLocation(), nullptr, nullptr);
}
static const char *getAccessName(AccessSpecifier AS) {
switch (AS) {
case AS_none:
llvm_unreachable("Invalid access specifier!");
case AS_public:
return "public";
case AS_private:
return "private";
case AS_protected:
return "protected";
}
llvm_unreachable("Invalid access specifier!");
}
const DiagnosticBuilder &clang::operator<<(const DiagnosticBuilder &DB,
AccessSpecifier AS) {
return DB << getAccessName(AS);
}
const PartialDiagnostic &clang::operator<<(const PartialDiagnostic &DB,
AccessSpecifier AS) {
return DB << getAccessName(AS);
}
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