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llvm-capstone/clang/lib/AST/DeclCXX.cpp
Alexis Hunt fcaeae4929 Implement a little bit of cleanup and a lot more of the base work 
behind implicit moves. We now correctly identify move constructors and
assignment operators and update bits on the record correctly. Generation
of implicit moves (declarations or definitions) is not yet supported.

llvm-svn: 132080
2011-05-25 20:50:04 +00:00

1668 lines
64 KiB
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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/DeclTemplate.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/ASTMutationListener.h"
#include "clang/AST/CXXInheritance.h"
#include "clang/AST/Expr.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
//===----------------------------------------------------------------------===//
CXXRecordDecl::DefinitionData::DefinitionData(CXXRecordDecl *D)
: UserDeclaredConstructor(false), UserDeclaredCopyConstructor(false),
UserDeclaredMoveConstructor(false), UserDeclaredCopyAssignment(false),
UserDeclaredMoveAssignment(false), UserDeclaredDestructor(false),
Aggregate(true), PlainOldData(true), Empty(true), Polymorphic(false),
Abstract(false), IsStandardLayout(true), HasNoNonEmptyBases(true),
HasPrivateFields(false), HasProtectedFields(false), HasPublicFields(false),
HasMutableFields(false), HasTrivialDefaultConstructor(true),
HasConstExprNonCopyMoveConstructor(false), HasTrivialCopyConstructor(true),
HasTrivialMoveConstructor(true), HasTrivialCopyAssignment(true),
HasTrivialMoveAssignment(true), HasTrivialDestructor(true),
HasNonLiteralTypeFieldsOrBases(false), ComputedVisibleConversions(false),
UserProvidedDefaultConstructor(false), DeclaredDefaultConstructor(false),
DeclaredCopyConstructor(false), DeclaredMoveConstructor(false),
DeclaredCopyAssignment(false), DeclaredMoveAssignment(false),
DeclaredDestructor(false), NumBases(0), NumVBases(0), Bases(), VBases(),
Definition(D), FirstFriend(0) {
}
CXXRecordDecl::CXXRecordDecl(Kind K, TagKind TK, DeclContext *DC,
SourceLocation StartLoc, SourceLocation IdLoc,
IdentifierInfo *Id, CXXRecordDecl *PrevDecl)
: RecordDecl(K, TK, DC, StartLoc, IdLoc, Id, PrevDecl),
DefinitionData(PrevDecl ? PrevDecl->DefinitionData : 0),
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) CXXRecordDecl(CXXRecord, TK, DC, StartLoc, IdLoc,
Id, PrevDecl);
// FIXME: DelayTypeCreation seems like such a hack
if (!DelayTypeCreation)
C.getTypeDeclType(R, PrevDecl);
return R;
}
CXXRecordDecl *CXXRecordDecl::Create(const ASTContext &C, EmptyShell Empty) {
return new (C) CXXRecordDecl(CXXRecord, TTK_Struct, 0, SourceLocation(),
SourceLocation(), 0, 0);
}
void
CXXRecordDecl::setBases(CXXBaseSpecifier const * const *Bases,
unsigned NumBases) {
ASTContext &C = getASTContext();
// C++ [dcl.init.aggr]p1:
// An aggregate is an array or a class (clause 9) with [...]
// no base classes [...].
data().Aggregate = false;
if (!data().Bases.isOffset() && data().NumBases > 0)
C.Deallocate(data().getBases());
// The set of seen virtual base types.
llvm::SmallPtrSet<CanQualType, 8> SeenVBaseTypes;
// The virtual bases of this class.
llvm::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());
// 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;
// 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())
data().HasNonLiteralTypeFieldsOrBases = true;
// Now go through all virtual bases of this base and add them.
for (CXXRecordDecl::base_class_iterator VBase =
BaseClassDecl->vbases_begin(),
E = BaseClassDecl->vbases_end(); VBase != E; ++VBase) {
// Add this base if it's not already in the list.
if (SeenVBaseTypes.insert(C.getCanonicalType(VBase->getType())))
VBases.push_back(VBase);
}
if (Base->isVirtual()) {
// Add this base if it's not already in the list.
if (SeenVBaseTypes.insert(C.getCanonicalType(BaseType)))
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++ [class.ctor]p5:
// A default constructor is trivial [...] if:
// -- its class has [...] no virtual bases
data().HasTrivialDefaultConstructor = false;
// C++0x [class.copy]p13:
// A copy/move constructor 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
data().HasTrivialCopyConstructor = false;
data().HasTrivialMoveConstructor = false;
// 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
data().HasTrivialCopyAssignment = false;
data().HasTrivialMoveAssignment = false;
// C++0x [class]p7:
// A standard-layout class is a class that: [...]
// -- has [...] no virtual base classes
data().IsStandardLayout = 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().HasTrivialDefaultConstructor = false;
// 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
// FIXME: C++0x: We need to only consider the selected constructor
// instead of all of them.
if (!BaseClassDecl->hasTrivialCopyConstructor())
data().HasTrivialCopyConstructor = false;
if (!BaseClassDecl->hasTrivialMoveConstructor())
data().HasTrivialMoveConstructor = false;
// 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
// FIXME: C++0x: We need to only consider the selected operator instead
// of all of them.
if (!BaseClassDecl->hasTrivialCopyAssignment())
data().HasTrivialCopyAssignment = false;
if (!BaseClassDecl->hasTrivialMoveAssignment())
data().HasTrivialMoveAssignment = 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().HasTrivialDestructor = false;
// Keep track of the presence of mutable fields.
if (BaseClassDecl->hasMutableFields())
data().HasMutableFields = true;
}
if (VBases.empty())
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) {
TypeSourceInfo *VBaseTypeInfo = VBases[I]->getTypeSourceInfo();
// Skip dependent types; we can't do any checking on them now.
if (VBaseTypeInfo->getType()->isDependentType())
continue;
CXXRecordDecl *VBaseClassDecl = cast<CXXRecordDecl>(
VBaseTypeInfo->getType()->getAs<RecordType>()->getDecl());
data().getVBases()[I] =
CXXBaseSpecifier(VBaseClassDecl->getSourceRange(), true,
VBaseClassDecl->getTagKind() == TTK_Class,
VBases[I]->getAccessSpecifier(), VBaseTypeInfo,
SourceLocation());
}
}
/// 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, 0);
}
bool CXXRecordDecl::hasConstCopyConstructor() const {
return getCopyConstructor(Qualifiers::Const) != 0;
}
bool CXXRecordDecl::isTriviallyCopyable() const {
// C++0x [class]p5:
// A trivially copyable class is a class that:
// -- has no non-trivial copy constructors,
if (!hasTrivialCopyConstructor()) return false;
// -- has no non-trivial move constructors,
if (!hasTrivialMoveConstructor()) return false;
// -- has no non-trivial copy assignment operators,
if (!hasTrivialCopyAssignment()) return false;
// -- has no non-trivial move assignment operators, and
if (!hasTrivialMoveAssignment()) return false;
// -- has a trivial destructor.
if (!hasTrivialDestructor()) return false;
return true;
}
/// \brief Perform a simplistic form of overload resolution that only considers
/// cv-qualifiers on a single parameter, and return the best overload candidate
/// (if there is one).
static CXXMethodDecl *
GetBestOverloadCandidateSimple(
const llvm::SmallVectorImpl<std::pair<CXXMethodDecl *, Qualifiers> > &Cands) {
if (Cands.empty())
return 0;
if (Cands.size() == 1)
return Cands[0].first;
unsigned Best = 0, N = Cands.size();
for (unsigned I = 1; I != N; ++I)
if (Cands[Best].second.compatiblyIncludes(Cands[I].second))
Best = I;
for (unsigned I = 1; I != N; ++I)
if (Cands[Best].second.compatiblyIncludes(Cands[I].second))
return 0;
return Cands[Best].first;
}
CXXConstructorDecl *CXXRecordDecl::getCopyConstructor(unsigned TypeQuals) const{
ASTContext &Context = getASTContext();
QualType ClassType
= Context.getTypeDeclType(const_cast<CXXRecordDecl*>(this));
DeclarationName ConstructorName
= Context.DeclarationNames.getCXXConstructorName(
Context.getCanonicalType(ClassType));
unsigned FoundTQs;
llvm::SmallVector<std::pair<CXXMethodDecl *, Qualifiers>, 4> Found;
DeclContext::lookup_const_iterator Con, ConEnd;
for (llvm::tie(Con, ConEnd) = this->lookup(ConstructorName);
Con != ConEnd; ++Con) {
// C++ [class.copy]p2:
// A non-template constructor for class X is a copy constructor if [...]
if (isa<FunctionTemplateDecl>(*Con))
continue;
CXXConstructorDecl *Constructor = cast<CXXConstructorDecl>(*Con);
if (Constructor->isCopyConstructor(FoundTQs)) {
if (((TypeQuals & Qualifiers::Const) == (FoundTQs & Qualifiers::Const)) ||
(!(TypeQuals & Qualifiers::Const) && (FoundTQs & Qualifiers::Const)))
Found.push_back(std::make_pair(
const_cast<CXXConstructorDecl *>(Constructor),
Qualifiers::fromCVRMask(FoundTQs)));
}
}
return cast_or_null<CXXConstructorDecl>(
GetBestOverloadCandidateSimple(Found));
}
CXXConstructorDecl *CXXRecordDecl::getMoveConstructor() const {
for (ctor_iterator I = ctor_begin(), E = ctor_end(); I != E; ++I)
if (I->isMoveConstructor())
return *I;
return 0;
}
CXXMethodDecl *CXXRecordDecl::getCopyAssignmentOperator(bool ArgIsConst) const {
ASTContext &Context = getASTContext();
QualType Class = Context.getTypeDeclType(const_cast<CXXRecordDecl *>(this));
DeclarationName Name = Context.DeclarationNames.getCXXOperatorName(OO_Equal);
llvm::SmallVector<std::pair<CXXMethodDecl *, Qualifiers>, 4> Found;
DeclContext::lookup_const_iterator Op, OpEnd;
for (llvm::tie(Op, OpEnd) = this->lookup(Name); Op != OpEnd; ++Op) {
// C++ [class.copy]p9:
// A user-declared copy assignment 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&.
const CXXMethodDecl* Method = dyn_cast<CXXMethodDecl>(*Op);
if (!Method || Method->isStatic() || Method->getPrimaryTemplate())
continue;
const FunctionProtoType *FnType
= Method->getType()->getAs<FunctionProtoType>();
assert(FnType && "Overloaded operator has no prototype.");
// Don't assert on this; an invalid decl might have been left in the AST.
if (FnType->getNumArgs() != 1 || FnType->isVariadic())
continue;
QualType ArgType = FnType->getArgType(0);
Qualifiers Quals;
if (const LValueReferenceType *Ref = ArgType->getAs<LValueReferenceType>()) {
ArgType = Ref->getPointeeType();
// If we have a const argument and we have a reference to a non-const,
// this function does not match.
if (ArgIsConst && !ArgType.isConstQualified())
continue;
Quals = ArgType.getQualifiers();
} else {
// By-value copy-assignment operators are treated like const X&
// copy-assignment operators.
Quals = Qualifiers::fromCVRMask(Qualifiers::Const);
}
if (!Context.hasSameUnqualifiedType(ArgType, Class))
continue;
// Save this copy-assignment operator. It might be "the one".
Found.push_back(std::make_pair(const_cast<CXXMethodDecl *>(Method), Quals));
}
// Use a simplistic form of overload resolution to find the candidate.
return GetBestOverloadCandidateSimple(Found);
}
CXXMethodDecl *CXXRecordDecl::getMoveAssignmentOperator() const {
for (method_iterator I = method_begin(), E = method_end(); I != E; ++I)
if (I->isMoveAssignmentOperator())
return *I;
return 0;
}
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) {
// 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++0x [class.ctor]p5
// A default constructor is trivial [...] if:
// -- its class has no virtual functions [...]
data().HasTrivialDefaultConstructor = false;
// C++0x [class.copy]p13:
// A copy/move constructor for class X is trivial if [...]
// -- class X has no virtual functions [...]
data().HasTrivialCopyConstructor = false;
data().HasTrivialMoveConstructor = false;
// C++0x [class.copy]p27:
// A copy/move assignment operator for class X is trivial if [...]
// -- class X has no virtual functions [...]
data().HasTrivialCopyAssignment = false;
data().HasTrivialMoveAssignment = false;
// FIXME: Destructor?
// C++0x [class]p7:
// A standard-layout class is a class that: [...]
// -- has no virtual functions
data().IsStandardLayout = false;
}
}
if (D->isImplicit()) {
// Notify that an implicit member was added after the definition
// was completed.
if (!isBeingDefined())
if (ASTMutationListener *L = getASTMutationListener())
L->AddedCXXImplicitMember(data().Definition, D);
// If this is a special member function, note that it was added and then
// return early.
if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(D)) {
if (Constructor->isDefaultConstructor())
data().DeclaredDefaultConstructor = true;
else if (Constructor->isCopyConstructor())
data().DeclaredCopyConstructor = true;
else if (Constructor->isMoveConstructor())
data().DeclaredMoveConstructor = true;
else
goto NotASpecialMember;
return;
} else if (isa<CXXDestructorDecl>(D)) {
data().DeclaredDestructor = true;
return;
} else if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) {
if (Method->isCopyAssignmentOperator())
data().DeclaredCopyAssignment = true;
else if (Method->isMoveAssignmentOperator())
data().DeclaredMoveAssignment = true;
else
goto NotASpecialMember;
return;
}
NotASpecialMember:;
// Any other implicit declarations are handled like normal declarations.
}
// Handle (user-declared) constructors.
if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(D)) {
// Note that we have a user-declared constructor.
data().UserDeclaredConstructor = true;
// FIXME: Under C++0x, /only/ special member functions may be user-provided.
// This is probably a defect.
bool UserProvided = false;
// C++0x [class.ctor]p5:
// A default constructor is trivial if it is not user-provided [...]
if (Constructor->isDefaultConstructor()) {
data().DeclaredDefaultConstructor = true;
if (Constructor->isUserProvided()) {
data().HasTrivialDefaultConstructor = false;
data().UserProvidedDefaultConstructor = true;
UserProvided = true;
}
}
// Note when we have a user-declared copy or move constructor, which will
// suppress the implicit declaration of those constructors.
if (!FunTmpl) {
if (Constructor->isCopyConstructor()) {
data().UserDeclaredCopyConstructor = true;
data().DeclaredCopyConstructor = true;
// C++0x [class.copy]p13:
// A copy/move constructor for class X is trivial if it is not
// user-provided [...]
if (Constructor->isUserProvided()) {
data().HasTrivialCopyConstructor = false;
UserProvided = true;
}
} else if (Constructor->isMoveConstructor()) {
data().UserDeclaredMoveConstructor = true;
data().DeclaredMoveConstructor = true;
// C++0x [class.copy]p13:
// A copy/move constructor for class X is trivial if it is not
// user-provided [...]
if (Constructor->isUserProvided()) {
data().HasTrivialMoveConstructor = false;
UserProvided = true;
}
}
}
if (Constructor->isConstExpr() &&
!Constructor->isCopyOrMoveConstructor()) {
// Record if we see any constexpr constructors which are niether copy
// nor move constructors.
data().HasConstExprNonCopyMoveConstructor = true;
}
// C++ [dcl.init.aggr]p1:
// An aggregate is an array or a class with no user-declared
// constructors [...].
// C++0x [dcl.init.aggr]p1:
// An aggregate is an array or a class with no user-provided
// constructors [...].
if (!getASTContext().getLangOptions().CPlusPlus0x || UserProvided)
data().Aggregate = false;
// 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;
return;
}
// Handle (user-declared) destructors.
if (CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(D)) {
data().DeclaredDestructor = true;
data().UserDeclaredDestructor = true;
// C++ [class]p4:
// A POD-struct is an aggregate class that has [...] no user-defined
// destructor.
// This bit is the C++03 POD bit, not the 0x one.
data().PlainOldData = false;
// C++0x [class.dtor]p5:
// A destructor is trivial if it is not user-provided and [...]
if (DD->isUserProvided())
data().HasTrivialDestructor = false;
return;
}
// Handle (user-declared) member functions.
if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) {
if (Method->isCopyAssignmentOperator()) {
// C++ [class]p4:
// A POD-struct is an aggregate class that [...] has no user-defined
// copy assignment operator [...].
// This is the C++03 bit only.
data().PlainOldData = false;
// This is a copy assignment operator.
// Suppress the implicit declaration of a copy constructor.
data().UserDeclaredCopyAssignment = true;
data().DeclaredCopyAssignment = true;
// C++0x [class.copy]p27:
// A copy/move assignment operator for class X is trivial if it is
// neither user-provided nor deleted [...]
if (Method->isUserProvided())
data().HasTrivialCopyAssignment = false;
return;
}
if (Method->isMoveAssignmentOperator()) {
// This is an extension in C++03 mode, but we'll keep consistency by
// taking a move assignment operator to induce non-POD-ness
data().PlainOldData = false;
// This is a move assignment operator.
data().UserDeclaredMoveAssignment = true;
data().DeclaredMoveAssignment = true;
// C++0x [class.copy]p27:
// A copy/move assignment operator for class X is trivial if it is
// neither user-provided nor deleted [...]
if (Method->isUserProvided())
data().HasTrivialMoveAssignment = false;
}
// Keep the list of conversion functions up-to-date.
if (CXXConversionDecl *Conversion = dyn_cast<CXXConversionDecl>(D)) {
// We don't record specializations.
if (Conversion->getPrimaryTemplate())
return;
// FIXME: We intentionally don't use the decl's access here because it
// hasn't been set yet. That's really just a misdesign in Sema.
if (FunTmpl) {
if (FunTmpl->getPreviousDeclaration())
data().Conversions.replace(FunTmpl->getPreviousDeclaration(),
FunTmpl);
else
data().Conversions.addDecl(FunTmpl);
} else {
if (Conversion->getPreviousDeclaration())
data().Conversions.replace(Conversion->getPreviousDeclaration(),
Conversion);
else
data().Conversions.addDecl(Conversion);
}
}
return;
}
// Handle non-static data members.
if (FieldDecl *Field = dyn_cast<FieldDecl>(D)) {
// 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: assert(0 && "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++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).
ASTContext &Context = getASTContext();
QualType T = Context.getBaseElementType(Field->getType());
if (!T->isPODType())
data().PlainOldData = false;
if (T->isReferenceType()) {
data().HasTrivialDefaultConstructor = false;
// 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 field or base.
if (!hasNonLiteralTypeFieldsOrBases() && !T->isLiteralType())
data().HasNonLiteralTypeFieldsOrBases = true;
if (const RecordType *RecordTy = T->getAs<RecordType>()) {
CXXRecordDecl* FieldRec = cast<CXXRecordDecl>(RecordTy->getDecl());
if (FieldRec->getDefinition()) {
// C++0x [class.ctor]p5:
// A defulat 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().HasTrivialDefaultConstructor = false;
// 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;
// FIXME: C++0x: We don't correctly model 'selected' constructors.
if (!FieldRec->hasTrivialCopyConstructor())
data().HasTrivialCopyConstructor = false;
if (!FieldRec->hasTrivialMoveConstructor())
data().HasTrivialMoveConstructor = false;
// 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;
// FIXME: C++0x: We don't correctly model 'selected' operators.
if (!FieldRec->hasTrivialCopyAssignment())
data().HasTrivialCopyAssignment = false;
if (!FieldRec->hasTrivialMoveAssignment())
data().HasTrivialMoveAssignment = false;
if (!FieldRec->hasTrivialDestructor())
data().HasTrivialDestructor = false;
// 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 on 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 (CXXRecordDecl::base_class_const_iterator BI = bases_begin(),
BE = bases_end();
BI != BE; ++BI) {
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++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->getBitWidth())
data().Empty = false;
else if (!Field->getBitWidth()->isTypeDependent() &&
!Field->getBitWidth()->isValueDependent()) {
llvm::APSInt Bits;
if (Field->getBitWidth()->isIntegerConstantExpr(Bits, Context))
if (!!Bits)
data().Empty = false;
}
}
}
// Handle using declarations of conversion functions.
if (UsingShadowDecl *Shadow = dyn_cast<UsingShadowDecl>(D))
if (Shadow->getDeclName().getNameKind()
== DeclarationName::CXXConversionFunctionName)
data().Conversions.addDecl(Shadow, Shadow->getAccess());
}
static CanQualType GetConversionType(ASTContext &Context, NamedDecl *Conv) {
QualType T;
if (isa<UsingShadowDecl>(Conv))
Conv = cast<UsingShadowDecl>(Conv)->getTargetDecl();
if (FunctionTemplateDecl *ConvTemp = dyn_cast<FunctionTemplateDecl>(Conv))
T = ConvTemp->getTemplatedDecl()->getResultType();
else
T = cast<CXXConversionDecl>(Conv)->getConversionType();
return Context.getCanonicalType(T);
}
/// Collect the visible conversions of a base class.
///
/// \param Base 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,
UnresolvedSetImpl &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.
UnresolvedSetImpl &Cs = *Record->getConversionFunctions();
if (!Cs.empty()) {
HiddenTypesBuffer = ParentHiddenTypes;
HiddenTypes = &HiddenTypesBuffer;
for (UnresolvedSetIterator I = Cs.begin(), E = Cs.end(); I != E; ++I) {
bool Hidden =
!HiddenTypesBuffer.insert(GetConversionType(Context, I.getDecl()));
// 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(I.getDecl(), IAccess);
}
}
}
// Collect information recursively from any base classes.
for (CXXRecordDecl::base_class_iterator
I = Record->bases_begin(), E = Record->bases_end(); I != E; ++I) {
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,
UnresolvedSetImpl &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.
UnresolvedSetImpl &Cs = *Record->getConversionFunctions();
Output.append(Cs.begin(), Cs.end());
for (UnresolvedSetIterator I = Cs.begin(), E = Cs.end(); I != E; ++I)
HiddenTypes.insert(GetConversionType(Context, I.getDecl()));
// Recursively collect conversions from base classes.
for (CXXRecordDecl::base_class_iterator
I = Record->bases_begin(), E = Record->bases_end(); I != E; ++I) {
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(I.getDecl(), I.getAccess());
}
}
/// getVisibleConversionFunctions - get all conversion functions visible
/// in current class; including conversion function templates.
const UnresolvedSetImpl *CXXRecordDecl::getVisibleConversionFunctions() {
// If root class, all conversions are visible.
if (bases_begin() == bases_end())
return &data().Conversions;
// If visible conversion list is already evaluated, return it.
if (data().ComputedVisibleConversions)
return &data().VisibleConversions;
CollectVisibleConversions(getASTContext(), this, data().VisibleConversions);
data().ComputedVisibleConversions = true;
return &data().VisibleConversions;
}
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.
UnresolvedSetImpl &Convs = *getConversionFunctions();
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 0;
}
MemberSpecializationInfo *CXXRecordDecl::getMemberSpecializationInfo() const {
return TemplateOrInstantiation.dyn_cast<MemberSpecializationInfo *>();
}
void
CXXRecordDecl::setInstantiationOfMemberClass(CXXRecordDecl *RD,
TemplateSpecializationKind TSK) {
assert(TemplateOrInstantiation.isNull() &&
"Previous template or instantiation?");
assert(!isa<ClassTemplateSpecializationDecl>(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;
}
assert(false && "Not a class template or member class specialization");
}
CXXDestructorDecl *CXXRecordDecl::getDestructor() const {
ASTContext &Context = getASTContext();
QualType ClassType = Context.getTypeDeclType(this);
DeclarationName Name
= Context.DeclarationNames.getCXXDestructorName(
Context.getCanonicalType(ClassType));
DeclContext::lookup_const_iterator I, E;
llvm::tie(I, E) = lookup(Name);
if (I == E)
return 0;
CXXDestructorDecl *Dtor = cast<CXXDestructorDecl>(*I);
return Dtor;
}
void CXXRecordDecl::completeDefinition() {
completeDefinition(0);
}
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 (UnresolvedSetIterator I = data().Conversions.begin(),
E = data().Conversions.end();
I != E; ++I)
data().Conversions.setAccess(I, (*I)->getAccess());
}
bool CXXRecordDecl::mayBeAbstract() const {
if (data().Abstract || isInvalidDecl() || !data().Polymorphic ||
isDependentContext())
return false;
for (CXXRecordDecl::base_class_const_iterator B = bases_begin(),
BEnd = bases_end();
B != BEnd; ++B) {
CXXRecordDecl *BaseDecl
= cast<CXXRecordDecl>(B->getType()->getAs<RecordType>()->getDecl());
if (BaseDecl->isAbstract())
return true;
}
return false;
}
CXXMethodDecl *
CXXMethodDecl::Create(ASTContext &C, CXXRecordDecl *RD,
SourceLocation StartLoc,
const DeclarationNameInfo &NameInfo,
QualType T, TypeSourceInfo *TInfo,
bool isStatic, StorageClass SCAsWritten, bool isInline,
SourceLocation EndLocation) {
return new (C) CXXMethodDecl(CXXMethod, RD, StartLoc, NameInfo, T, TInfo,
isStatic, SCAsWritten, isInline, EndLocation);
}
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.
for (DeclContext::lookup_const_result R = getDeclContext()->lookup(getDeclName());
R.first != R.second; ++R.first) {
if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(*R.first))
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())
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())
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!");
getASTContext().addOverriddenMethod(this, MD);
}
CXXMethodDecl::method_iterator CXXMethodDecl::begin_overridden_methods() const {
return getASTContext().overridden_methods_begin(this);
}
CXXMethodDecl::method_iterator CXXMethodDecl::end_overridden_methods() const {
return getASTContext().overridden_methods_end(this);
}
unsigned CXXMethodDecl::size_overridden_methods() const {
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();
}
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), 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), 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), IsVirtual(false),
IsWritten(false), SourceOrderOrNumArrayIndices(0)
{
}
CXXCtorInitializer::CXXCtorInitializer(ASTContext &Context,
SourceLocation D, SourceLocation L,
CXXConstructorDecl *Target, Expr *Init,
SourceLocation R)
: Initializee(Target), MemberOrEllipsisLocation(D), Init(Init),
LParenLoc(L), RParenLoc(R), 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), 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 0;
}
SourceLocation CXXCtorInitializer::getSourceLocation() const {
if (isAnyMemberInitializer() || isDelegatingInitializer())
return getMemberLocation();
return getBaseClassLoc().getLocalSourceRange().getBegin();
}
SourceRange CXXCtorInitializer::getSourceRange() const {
return SourceRange(getSourceLocation(), getRParenLoc());
}
CXXConstructorDecl *
CXXConstructorDecl::Create(ASTContext &C, EmptyShell Empty) {
return new (C) CXXConstructorDecl(0, SourceLocation(), DeclarationNameInfo(),
QualType(), 0, 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) {
assert(NameInfo.getName().getNameKind()
== DeclarationName::CXXConstructorName &&
"Name must refer to a constructor");
return new (C) CXXConstructorDecl(RD, StartLoc, NameInfo, T, TInfo,
isExplicit, isInline, isImplicitlyDeclared);
}
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() != 0) ||
(getDescribedFunctionTemplate() != 0))
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());
}
bool CXXConstructorDecl::isSpecializationCopyingObject() const {
if ((getNumParams() < 1) ||
(getNumParams() > 1 && !getParamDecl(1)->hasDefaultArg()) ||
(getPrimaryTemplate() == 0) ||
(getDescribedFunctionTemplate() != 0))
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 = begin_overridden_methods();
if (It == end_overridden_methods())
return 0;
return cast<CXXConstructorDecl>(*It);
}
void
CXXConstructorDecl::setInheritedConstructor(const CXXConstructorDecl *BaseCtor){
// Hack: we store the inherited constructor in the overridden method table
assert(size_overridden_methods() == 0 && "Base ctor already set.");
addOverriddenMethod(BaseCtor);
}
CXXDestructorDecl *
CXXDestructorDecl::Create(ASTContext &C, EmptyShell Empty) {
return new (C) CXXDestructorDecl(0, SourceLocation(), DeclarationNameInfo(),
QualType(), 0, 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) CXXDestructorDecl(RD, StartLoc, NameInfo, T, TInfo, isInline,
isImplicitlyDeclared);
}
CXXConversionDecl *
CXXConversionDecl::Create(ASTContext &C, EmptyShell Empty) {
return new (C) CXXConversionDecl(0, SourceLocation(), DeclarationNameInfo(),
QualType(), 0, false, false,
SourceLocation());
}
CXXConversionDecl *
CXXConversionDecl::Create(ASTContext &C, CXXRecordDecl *RD,
SourceLocation StartLoc,
const DeclarationNameInfo &NameInfo,
QualType T, TypeSourceInfo *TInfo,
bool isInline, bool isExplicit,
SourceLocation EndLocation) {
assert(NameInfo.getName().getNameKind()
== DeclarationName::CXXConversionFunctionName &&
"Name must refer to a conversion function");
return new (C) CXXConversionDecl(RD, StartLoc, NameInfo, T, TInfo,
isInline, isExplicit, EndLocation);
}
LinkageSpecDecl *LinkageSpecDecl::Create(ASTContext &C,
DeclContext *DC,
SourceLocation ExternLoc,
SourceLocation LangLoc,
LanguageIDs Lang,
SourceLocation RBraceLoc) {
return new (C) LinkageSpecDecl(DC, ExternLoc, LangLoc, Lang, RBraceLoc);
}
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) UsingDirectiveDecl(DC, L, NamespaceLoc, QualifierLoc,
IdentLoc, Used, CommonAncestor);
}
NamespaceDecl *UsingDirectiveDecl::getNominatedNamespace() {
if (NamespaceAliasDecl *NA =
dyn_cast_or_null<NamespaceAliasDecl>(NominatedNamespace))
return NA->getNamespace();
return cast_or_null<NamespaceDecl>(NominatedNamespace);
}
NamespaceAliasDecl *NamespaceAliasDecl::Create(ASTContext &C, DeclContext *DC,
SourceLocation UsingLoc,
SourceLocation AliasLoc,
IdentifierInfo *Alias,
NestedNameSpecifierLoc QualifierLoc,
SourceLocation IdentLoc,
NamedDecl *Namespace) {
if (NamespaceDecl *NS = dyn_cast_or_null<NamespaceDecl>(Namespace))
Namespace = NS->getOriginalNamespace();
return new (C) NamespaceAliasDecl(DC, UsingLoc, AliasLoc, Alias,
QualifierLoc, IdentLoc, Namespace);
}
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::addShadowDecl(UsingShadowDecl *S) {
assert(std::find(shadow_begin(), shadow_end(), S) == shadow_end() &&
"declaration already in set");
assert(S->getUsingDecl() == this);
if (FirstUsingShadow)
S->UsingOrNextShadow = FirstUsingShadow;
FirstUsingShadow = 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 == S) {
FirstUsingShadow = dyn_cast<UsingShadowDecl>(S->UsingOrNextShadow);
S->UsingOrNextShadow = this;
return;
}
UsingShadowDecl *Prev = FirstUsingShadow;
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 IsTypeNameArg) {
return new (C) UsingDecl(DC, UL, QualifierLoc, NameInfo, IsTypeNameArg);
}
UnresolvedUsingValueDecl *
UnresolvedUsingValueDecl::Create(ASTContext &C, DeclContext *DC,
SourceLocation UsingLoc,
NestedNameSpecifierLoc QualifierLoc,
const DeclarationNameInfo &NameInfo) {
return new (C) UnresolvedUsingValueDecl(DC, C.DependentTy, UsingLoc,
QualifierLoc, NameInfo);
}
UnresolvedUsingTypenameDecl *
UnresolvedUsingTypenameDecl::Create(ASTContext &C, DeclContext *DC,
SourceLocation UsingLoc,
SourceLocation TypenameLoc,
NestedNameSpecifierLoc QualifierLoc,
SourceLocation TargetNameLoc,
DeclarationName TargetName) {
return new (C) UnresolvedUsingTypenameDecl(DC, UsingLoc, TypenameLoc,
QualifierLoc, TargetNameLoc,
TargetName.getAsIdentifierInfo());
}
StaticAssertDecl *StaticAssertDecl::Create(ASTContext &C, DeclContext *DC,
SourceLocation StaticAssertLoc,
Expr *AssertExpr,
StringLiteral *Message,
SourceLocation RParenLoc) {
return new (C) StaticAssertDecl(DC, StaticAssertLoc, AssertExpr, Message,
RParenLoc);
}
static const char *getAccessName(AccessSpecifier AS) {
switch (AS) {
default:
case AS_none:
assert("Invalid access specifier!");
return 0;
case AS_public:
return "public";
case AS_private:
return "private";
case AS_protected:
return "protected";
}
}
const DiagnosticBuilder &clang::operator<<(const DiagnosticBuilder &DB,
AccessSpecifier AS) {
return DB << getAccessName(AS);
}
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