std::vector<VariableDeclaration>
Declaration::GetVariableDeclarations() const {
Assert(declSpecs->storageClass != SC_TYPEDEF);
std::vector<VariableDeclaration> vars;
for (unsigned int i = 0; i < declarators.size(); ++i) {
if (declarators[i] == NULL)
continue;
Declarator *decl = declarators[i];
if (decl == NULL)
// Ignore earlier errors
continue;
Symbol *sym = decl->GetSymbol();
if (dynamic_cast<const FunctionType *>(sym->type) != NULL) {
// function declaration
m->symbolTable->AddFunction(sym);
}
else {
m->symbolTable->AddVariable(sym);
vars.push_back(VariableDeclaration(sym, decl->initExpr));
}
}
return vars;
}
void
Declaration::DeclareFunctions() {
Assert(declSpecs->storageClass != SC_TYPEDEF);
for (unsigned int i = 0; i < declarators.size(); ++i) {
Declarator *decl = declarators[i];
if (decl == NULL) {
// Ignore earlier errors
Assert(m->errorCount > 0);
continue;
}
Symbol *sym = decl->GetSymbol();
if (sym == NULL || sym->type == NULL) {
// Ignore errors
Assert(m->errorCount > 0);
continue;
}
sym->type = sym->type->ResolveUnboundVariability(Type::Varying);
if (dynamic_cast<const FunctionType *>(sym->type) == NULL)
continue;
bool isInline = (declSpecs->typeQualifiers & TYPEQUAL_INLINE);
m->AddFunctionDeclaration(sym, isInline);
}
}
std::vector<VariableDeclaration>
Declaration::GetVariableDeclarations() const {
Assert(declSpecs->storageClass != SC_TYPEDEF);
std::vector<VariableDeclaration> vars;
for (unsigned int i = 0; i < declarators.size(); ++i) {
Declarator *decl = declarators[i];
if (decl == NULL) {
// Ignore earlier errors
Assert(m->errorCount > 0);
continue;
}
Symbol *sym = decl->GetSymbol();
if (sym == NULL || sym->type == NULL) {
// Ignore errors
Assert(m->errorCount > 0);
continue;
}
sym->type = sym->type->ResolveUnboundVariability(Type::Varying);
if (sym->type == AtomicType::Void)
Error(sym->pos, "\"void\" type variable illegal in declaration.");
else if (dynamic_cast<const FunctionType *>(sym->type) == NULL) {
m->symbolTable->AddVariable(sym);
vars.push_back(VariableDeclaration(sym, decl->initExpr));
}
}
return vars;
}
void Stream::ReadMembers(uint8* object, ClassType* pType)
{
for (uint i = 0; i < pType->m_pScope->m_orderedDecls.size(); i++)
{
Declarator* decl = pType->m_pScope->m_orderedDecls[i];
if (!decl->get_IsStatic() && !decl->get_IsTypedef())
{
Type* pType = decl->m_pType->GetStripped();
Type_type kind = pType->get_Kind();
if (kind == type_array)
{
ASSERT(0);
/*
ArrayType* array = static_cast<ArrayType*>(decl->m_pType);
uint count = array->get_ElemCount();
for (uint i = 0; i < count; i++)
{
WriteMember(object + decl->m_offset + i*array->get_ElemType()->get_sizeof(), array->get_ElemType(), stream);
}
*/
}
else if (kind != type_function)
{
ReadMember(object + decl->m_offset, pType);
}
}
}
}
virtual Action::DeclPtrTy
ActOnDeclarator(Scope *S, Declarator &D) {
// Print names of global variables. Differentiating between
// global variables and global functions is Hard in C, so this
// is only an approximation.
const DeclSpec& DS = D.getDeclSpec();
SourceLocation loc = D.getIdentifierLoc();
if (
// Only global declarations...
D.getContext() == Declarator::FileContext
// ...that aren't typedefs or `extern` declarations...
&& DS.getStorageClassSpec() != DeclSpec::SCS_extern
&& DS.getStorageClassSpec() != DeclSpec::SCS_typedef
// ...and no functions...
&& !D.isFunctionDeclarator()
// ...and in a user header
&& !pp.getSourceManager().isInSystemHeader(loc)
) {
IdentifierInfo *II = D.getIdentifier();
std::cerr << "Found global user declarator " << II->getName() << std::endl;
}
return MinimalAction::ActOnDeclarator(S, D);
}
/// CheckAllocatedType - Checks that a type is suitable as the allocated type
/// in a new-expression.
/// dimension off and stores the size expression in ArraySize.
bool Sema::CheckAllocatedType(QualType AllocType, const Declarator &D)
{
// C++ 5.3.4p1: "[The] type shall be a complete object type, but not an
// abstract class type or array thereof.
if (AllocType->isFunctionType())
return Diag(D.getSourceRange().getBegin(), diag::err_bad_new_type)
<< AllocType << 0 << D.getSourceRange();
else if (AllocType->isReferenceType())
return Diag(D.getSourceRange().getBegin(), diag::err_bad_new_type)
<< AllocType << 1 << D.getSourceRange();
else if (!AllocType->isDependentType() &&
RequireCompleteType(D.getSourceRange().getBegin(), AllocType,
diag::err_new_incomplete_type,
D.getSourceRange()))
return true;
else if (RequireNonAbstractType(D.getSourceRange().getBegin(), AllocType,
diag::err_allocation_of_abstract_type))
return true;
// Every dimension shall be of constant size.
unsigned i = 1;
while (const ArrayType *Array = Context.getAsArrayType(AllocType)) {
if (!Array->isConstantArrayType()) {
Diag(D.getTypeObject(i).Loc, diag::err_new_array_nonconst)
<< static_cast<Expr*>(D.getTypeObject(i).Arr.NumElts)->getSourceRange();
return true;
}
AllocType = Array->getElementType();
++i;
}
return false;
}
void
GetStructTypesNamesPositions(const std::vector<StructDeclaration *> &sd,
llvm::SmallVector<const Type *, 8> *elementTypes,
llvm::SmallVector<std::string, 8> *elementNames,
llvm::SmallVector<SourcePos, 8> *elementPositions) {
std::set<std::string> seenNames;
for (unsigned int i = 0; i < sd.size(); ++i) {
const Type *type = sd[i]->type;
if (type == NULL)
continue;
// FIXME: making this fake little DeclSpecs here is really
// disgusting
DeclSpecs ds(type);
if (Type::Equal(type, AtomicType::Void) == false) {
if (type->IsUniformType())
ds.typeQualifiers |= TYPEQUAL_UNIFORM;
else if (type->IsVaryingType())
ds.typeQualifiers |= TYPEQUAL_VARYING;
else if (type->GetSOAWidth() != 0)
ds.soaWidth = type->GetSOAWidth();
// FIXME: ds.vectorSize?
}
for (unsigned int j = 0; j < sd[i]->declarators->size(); ++j) {
Declarator *d = (*sd[i]->declarators)[j];
d->InitFromDeclSpecs(&ds);
if (Type::Equal(d->type, AtomicType::Void))
Error(d->pos, "\"void\" type illegal for struct member.");
elementTypes->push_back(d->type);
if (seenNames.find(d->name) != seenNames.end())
Error(d->pos, "Struct member \"%s\" has same name as a "
"previously-declared member.", d->name.c_str());
else
seenNames.insert(d->name);
elementNames->push_back(d->name);
elementPositions->push_back(d->pos);
}
}
for (int i = 0; i < (int)elementTypes->size() - 1; ++i) {
const ArrayType *arrayType = CastType<ArrayType>((*elementTypes)[i]);
if (arrayType != NULL && arrayType->GetElementCount() == 0)
Error((*elementPositions)[i], "Unsized arrays aren't allowed except "
"for the last member in a struct definition.");
}
}
void
GetStructTypesNamesPositions(const std::vector<StructDeclaration *> &sd,
std::vector<const Type *> *elementTypes,
std::vector<std::string> *elementNames,
std::vector<SourcePos> *elementPositions) {
std::set<std::string> seenNames;
for (unsigned int i = 0; i < sd.size(); ++i) {
const Type *type = sd[i]->type;
if (type == NULL)
continue;
// FIXME: making this fake little DeclSpecs here is really
// disgusting
DeclSpecs ds(type);
if (type->IsUniformType())
ds.typeQualifiers |= TYPEQUAL_UNIFORM;
else if (type->IsVaryingType())
ds.typeQualifiers |= TYPEQUAL_VARYING;
for (unsigned int j = 0; j < sd[i]->declarators->size(); ++j) {
Declarator *d = (*sd[i]->declarators)[j];
d->InitFromDeclSpecs(&ds);
Symbol *sym = d->GetSymbol();
if (sym->type == AtomicType::Void)
Error(d->pos, "\"void\" type illegal for struct member.");
const ArrayType *arrayType =
dynamic_cast<const ArrayType *>(sym->type);
if (arrayType != NULL && arrayType->GetElementCount() == 0) {
Error(d->pos, "Unsized arrays aren't allowed in struct "
"definitions.");
elementTypes->push_back(NULL);
}
else
elementTypes->push_back(sym->type);
if (seenNames.find(sym->name) != seenNames.end())
Error(d->pos, "Struct member \"%s\" has same name as a "
"previously-declared member.", sym->name.c_str());
else
seenNames.insert(sym->name);
elementNames->push_back(sym->name);
elementPositions->push_back(sym->pos);
}
}
}
Symbol *
Declarator::GetFunctionInfo(DeclSpecs *ds, std::vector<Symbol *> *funArgs) {
const FunctionType *type =
dynamic_cast<const FunctionType *>(GetType(ds));
if (type == NULL)
return NULL;
Symbol *declSym = GetSymbol();
Assert(declSym != NULL);
// Get the symbol for the function from the symbol table. (It should
// already have been added to the symbol table by AddGlobal() by the
// time we get here.)
Symbol *funSym = m->symbolTable->LookupFunction(declSym->name.c_str(), type);
if (funSym == NULL)
// May be NULL due to error earlier in compilation
Assert(m->errorCount > 0);
else
funSym->pos = pos;
// Walk down to the declarator for the function. (We have to get past
// the stuff that specifies the function's return type before we get to
// the function's declarator.)
Declarator *d = this;
while (d != NULL && d->kind != DK_FUNCTION)
d = d->child;
Assert(d != NULL);
for (unsigned int i = 0; i < d->functionParams.size(); ++i) {
Symbol *sym = d->GetSymbolForFunctionParameter(i);
if (sym->type == NULL) {
Assert(m->errorCount > 0);
continue;
}
else
sym->type = sym->type->ResolveUnboundVariability(Type::Varying);
funArgs->push_back(sym);
}
if (funSym != NULL)
funSym->type = funSym->type->ResolveUnboundVariability(Type::Varying);
return funSym;
}
void Stream::WriteMembers(const uint8* object, ClassType* pType)
{
for (uint i = 0; i < pType->m_pScope->m_orderedDecls.size(); i++)
{
Declarator* decl = pType->m_pScope->m_orderedDecls[i];
if (!decl->get_IsStatic() && !decl->get_IsTypedef())
{
Type* pType = decl->m_pType->GetStripped();
Type_type kind = pType->get_Kind();
if (kind == type_array)
{
ArrayType* array = static_cast<ArrayType*>(pType);
size_t count = array->get_ElemCount();
for (size_t i = 0; i < count; ++i)
{
WriteMember(object + decl->m_offset + i*array->get_ElemType()->get_sizeof(), array->get_ElemType());
}
}
else if (kind != type_function)
{
WriteMember(object + decl->m_offset, pType);
/*
switch (kind)
{
case type_int:
case type_long:
case type_unsigned_int:
case type_unsigned_long:
case type_float:
case type_double:
case type_long_long:
}
*/
}
}
}
}
/// ActOnCXXConditionDeclarationExpr - Parsed a condition declaration of a
/// C++ if/switch/while/for statement.
/// e.g: "if (int x = f()) {...}"
Action::OwningExprResult
Sema::ActOnCXXConditionDeclarationExpr(Scope *S, SourceLocation StartLoc,
Declarator &D,
SourceLocation EqualLoc,
ExprArg AssignExprVal) {
assert(AssignExprVal.get() && "Null assignment expression");
// C++ 6.4p2:
// The declarator shall not specify a function or an array.
// The type-specifier-seq shall not contain typedef and shall not declare a
// new class or enumeration.
assert(D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_typedef &&
"Parser allowed 'typedef' as storage class of condition decl.");
QualType Ty = GetTypeForDeclarator(D, S);
if (Ty->isFunctionType()) { // The declarator shall not specify a function...
// We exit without creating a CXXConditionDeclExpr because a FunctionDecl
// would be created and CXXConditionDeclExpr wants a VarDecl.
return ExprError(Diag(StartLoc, diag::err_invalid_use_of_function_type)
<< SourceRange(StartLoc, EqualLoc));
} else if (Ty->isArrayType()) { // ...or an array.
Diag(StartLoc, diag::err_invalid_use_of_array_type)
<< SourceRange(StartLoc, EqualLoc);
} else if (const RecordType *RT = Ty->getAsRecordType()) {
RecordDecl *RD = RT->getDecl();
// The type-specifier-seq shall not declare a new class...
if (RD->isDefinition() &&
(RD->getIdentifier() == 0 || S->isDeclScope(DeclPtrTy::make(RD))))
Diag(RD->getLocation(), diag::err_type_defined_in_condition);
} else if (const EnumType *ET = Ty->getAsEnumType()) {
EnumDecl *ED = ET->getDecl();
// ...or enumeration.
if (ED->isDefinition() &&
(ED->getIdentifier() == 0 || S->isDeclScope(DeclPtrTy::make(ED))))
Diag(ED->getLocation(), diag::err_type_defined_in_condition);
}
DeclPtrTy Dcl = ActOnDeclarator(S, D, DeclPtrTy());
if (!Dcl)
return ExprError();
AddInitializerToDecl(Dcl, move(AssignExprVal));
// Mark this variable as one that is declared within a conditional.
// We know that the decl had to be a VarDecl because that is the only type of
// decl that can be assigned and the grammar requires an '='.
VarDecl *VD = cast<VarDecl>(Dcl.getAs<Decl>());
VD->setDeclaredInCondition(true);
return Owned(new (Context) CXXConditionDeclExpr(StartLoc, EqualLoc, VD));
}
/// ActOnDeclarator - If this is a typedef declarator, we modify the
/// IdentifierInfo::FETokenInfo field to keep track of this fact, until S is
/// popped.
Action::DeclPtrTy
MinimalAction::ActOnDeclarator(Scope *S, Declarator &D) {
IdentifierInfo *II = D.getIdentifier();
// If there is no identifier associated with this declarator, bail out.
if (II == 0) return DeclPtrTy();
TypeNameInfo *weCurrentlyHaveTypeInfo = II->getFETokenInfo<TypeNameInfo>();
bool isTypeName =
D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef;
// this check avoids creating TypeNameInfo objects for the common case.
// It does need to handle the uncommon case of shadowing a typedef name with a
// non-typedef name. e.g. { typedef int a; a xx; { int a; } }
if (weCurrentlyHaveTypeInfo || isTypeName) {
// Allocate and add the 'TypeNameInfo' "decl".
getTable(TypeNameInfoTablePtr)->AddEntry(isTypeName, II);
// Remember that this needs to be removed when the scope is popped.
S->AddDecl(DeclPtrTy::make(II));
}
return DeclPtrTy();
}
Sema::TypeResult Sema::ActOnTypeName(Scope *S, Declarator &D) {
// C99 6.7.6: Type names have no identifier. This is already validated by
// the parser.
assert(D.getIdentifier() == 0 && "Type name should have no identifier!");
QualType T = GetTypeForDeclarator(D, S);
if (T.isNull())
return true;
// Check that there are no default arguments (C++ only).
if (getLangOptions().CPlusPlus)
CheckExtraCXXDefaultArguments(D);
return T.getAsOpaquePtr();
}
/// ParseCXXInlineMethodDef - We parsed and verified that the specified
/// Declarator is a well formed C++ inline method definition. Now lex its body
/// and store its tokens for parsing after the C++ class is complete.
Parser::DeclPtrTy
Parser::ParseCXXInlineMethodDef(AccessSpecifier AS, Declarator &D,
const ParsedTemplateInfo &TemplateInfo) {
assert(D.getTypeObject(0).Kind == DeclaratorChunk::Function &&
"This isn't a function declarator!");
assert((Tok.is(tok::l_brace) || Tok.is(tok::colon) || Tok.is(tok::kw_try)) &&
"Current token not a '{', ':' or 'try'!");
Action::MultiTemplateParamsArg TemplateParams(Actions,
TemplateInfo.TemplateParams? TemplateInfo.TemplateParams->data() : 0,
TemplateInfo.TemplateParams? TemplateInfo.TemplateParams->size() : 0);
DeclPtrTy FnD;
if (D.getDeclSpec().isFriendSpecified())
// FIXME: Friend templates
FnD = Actions.ActOnFriendFunctionDecl(CurScope, D, true, move(TemplateParams));
else // FIXME: pass template information through
FnD = Actions.ActOnCXXMemberDeclarator(CurScope, AS, D,
move(TemplateParams), 0, 0);
HandleMemberFunctionDefaultArgs(D, FnD);
// Consume the tokens and store them for later parsing.
getCurrentClass().MethodDefs.push_back(LexedMethod(FnD));
getCurrentClass().MethodDefs.back().TemplateScope
= CurScope->isTemplateParamScope();
CachedTokens &Toks = getCurrentClass().MethodDefs.back().Toks;
tok::TokenKind kind = Tok.getKind();
// We may have a constructor initializer or function-try-block here.
if (kind == tok::colon || kind == tok::kw_try) {
// Consume everything up to (and including) the left brace.
if (!ConsumeAndStoreUntil(tok::l_brace, tok::unknown, Toks, tok::semi)) {
// We didn't find the left-brace we expected after the
// constructor initializer.
if (Tok.is(tok::semi)) {
// We found a semicolon; complain, consume the semicolon, and
// don't try to parse this method later.
Diag(Tok.getLocation(), diag::err_expected_lbrace);
ConsumeAnyToken();
getCurrentClass().MethodDefs.pop_back();
return FnD;
}
}
} else {
// Begin by storing the '{' token.
Toks.push_back(Tok);
ConsumeBrace();
}
// Consume everything up to (and including) the matching right brace.
ConsumeAndStoreUntil(tok::r_brace, tok::unknown, Toks);
// If we're in a function-try-block, we need to store all the catch blocks.
if (kind == tok::kw_try) {
while (Tok.is(tok::kw_catch)) {
ConsumeAndStoreUntil(tok::l_brace, tok::unknown, Toks);
ConsumeAndStoreUntil(tok::r_brace, tok::unknown, Toks);
}
}
return FnD;
}
/// ActOnCXXNew - Parsed a C++ 'new' expression (C++ 5.3.4), as in e.g.:
/// @code new (memory) int[size][4] @endcode
/// or
/// @code ::new Foo(23, "hello") @endcode
/// For the interpretation of this heap of arguments, consult the base version.
Action::OwningExprResult
Sema::ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal,
SourceLocation PlacementLParen, MultiExprArg PlacementArgs,
SourceLocation PlacementRParen, bool ParenTypeId,
Declarator &D, SourceLocation ConstructorLParen,
MultiExprArg ConstructorArgs,
SourceLocation ConstructorRParen)
{
Expr *ArraySize = 0;
unsigned Skip = 0;
// If the specified type is an array, unwrap it and save the expression.
if (D.getNumTypeObjects() > 0 &&
D.getTypeObject(0).Kind == DeclaratorChunk::Array) {
DeclaratorChunk &Chunk = D.getTypeObject(0);
if (Chunk.Arr.hasStatic)
return ExprError(Diag(Chunk.Loc, diag::err_static_illegal_in_new)
<< D.getSourceRange());
if (!Chunk.Arr.NumElts)
return ExprError(Diag(Chunk.Loc, diag::err_array_new_needs_size)
<< D.getSourceRange());
ArraySize = static_cast<Expr*>(Chunk.Arr.NumElts);
Skip = 1;
}
QualType AllocType = GetTypeForDeclarator(D, /*Scope=*/0, Skip);
if (D.getInvalidType())
return ExprError();
if (CheckAllocatedType(AllocType, D))
return ExprError();
QualType ResultType = AllocType->isDependentType()
? Context.DependentTy
: Context.getPointerType(AllocType);
// That every array dimension except the first is constant was already
// checked by the type check above.
// C++ 5.3.4p6: "The expression in a direct-new-declarator shall have integral
// or enumeration type with a non-negative value."
if (ArraySize && !ArraySize->isTypeDependent()) {
QualType SizeType = ArraySize->getType();
if (!SizeType->isIntegralType() && !SizeType->isEnumeralType())
return ExprError(Diag(ArraySize->getSourceRange().getBegin(),
diag::err_array_size_not_integral)
<< SizeType << ArraySize->getSourceRange());
// Let's see if this is a constant < 0. If so, we reject it out of hand.
// We don't care about special rules, so we tell the machinery it's not
// evaluated - it gives us a result in more cases.
if (!ArraySize->isValueDependent()) {
llvm::APSInt Value;
if (ArraySize->isIntegerConstantExpr(Value, Context, 0, false)) {
if (Value < llvm::APSInt(
llvm::APInt::getNullValue(Value.getBitWidth()), false))
return ExprError(Diag(ArraySize->getSourceRange().getBegin(),
diag::err_typecheck_negative_array_size)
<< ArraySize->getSourceRange());
}
}
}
FunctionDecl *OperatorNew = 0;
FunctionDecl *OperatorDelete = 0;
Expr **PlaceArgs = (Expr**)PlacementArgs.get();
unsigned NumPlaceArgs = PlacementArgs.size();
if (!AllocType->isDependentType() &&
!Expr::hasAnyTypeDependentArguments(PlaceArgs, NumPlaceArgs) &&
FindAllocationFunctions(StartLoc,
SourceRange(PlacementLParen, PlacementRParen),
UseGlobal, AllocType, ArraySize, PlaceArgs,
NumPlaceArgs, OperatorNew, OperatorDelete))
return ExprError();
bool Init = ConstructorLParen.isValid();
// --- Choosing a constructor ---
// C++ 5.3.4p15
// 1) If T is a POD and there's no initializer (ConstructorLParen is invalid)
// the object is not initialized. If the object, or any part of it, is
// const-qualified, it's an error.
// 2) If T is a POD and there's an empty initializer, the object is value-
// initialized.
// 3) If T is a POD and there's one initializer argument, the object is copy-
// constructed.
// 4) If T is a POD and there's more initializer arguments, it's an error.
// 5) If T is not a POD, the initializer arguments are used as constructor
// arguments.
//
// Or by the C++0x formulation:
// 1) If there's no initializer, the object is default-initialized according
// to C++0x rules.
// 2) Otherwise, the object is direct-initialized.
CXXConstructorDecl *Constructor = 0;
Expr **ConsArgs = (Expr**)ConstructorArgs.get();
unsigned NumConsArgs = ConstructorArgs.size();
if (AllocType->isDependentType()) {
// Skip all the checks.
}
// FIXME: Should check for primitive/aggregate here, not record.
else if (const RecordType *RT = AllocType->getAsRecordType()) {
// FIXME: This is incorrect for when there is an empty initializer and
// no user-defined constructor. Must zero-initialize, not default-construct.
Constructor = PerformInitializationByConstructor(
AllocType, ConsArgs, NumConsArgs,
D.getSourceRange().getBegin(),
SourceRange(D.getSourceRange().getBegin(),
ConstructorRParen),
RT->getDecl()->getDeclName(),
NumConsArgs != 0 ? IK_Direct : IK_Default);
if (!Constructor)
return ExprError();
} else {
if (!Init) {
// FIXME: Check that no subpart is const.
if (AllocType.isConstQualified())
return ExprError(Diag(StartLoc, diag::err_new_uninitialized_const)
<< D.getSourceRange());
} else if (NumConsArgs == 0) {
// Object is value-initialized. Do nothing.
} else if (NumConsArgs == 1) {
// Object is direct-initialized.
// FIXME: WHAT DeclarationName do we pass in here?
if (CheckInitializerTypes(ConsArgs[0], AllocType, StartLoc,
DeclarationName() /*AllocType.getAsString()*/,
/*DirectInit=*/true))
return ExprError();
} else {
return ExprError(Diag(StartLoc,
diag::err_builtin_direct_init_more_than_one_arg)
<< SourceRange(ConstructorLParen, ConstructorRParen));
}
}
// FIXME: Also check that the destructor is accessible. (C++ 5.3.4p16)
PlacementArgs.release();
ConstructorArgs.release();
return Owned(new (Context) CXXNewExpr(UseGlobal, OperatorNew, PlaceArgs,
NumPlaceArgs, ParenTypeId, ArraySize, Constructor, Init,
ConsArgs, NumConsArgs, OperatorDelete, ResultType,
StartLoc, Init ? ConstructorRParen : SourceLocation()));
}
/// GetTypeForDeclarator - Convert the type for the specified
/// declarator to Type instances. Skip the outermost Skip type
/// objects.
QualType Sema::GetTypeForDeclarator(Declarator &D, Scope *S, unsigned Skip) {
bool OmittedReturnType = false;
if (D.getContext() == Declarator::BlockLiteralContext
&& Skip == 0
&& !D.getDeclSpec().hasTypeSpecifier()
&& (D.getNumTypeObjects() == 0
|| (D.getNumTypeObjects() == 1
&& D.getTypeObject(0).Kind == DeclaratorChunk::Function)))
OmittedReturnType = true;
// long long is a C99 feature.
if (!getLangOptions().C99 && !getLangOptions().CPlusPlus0x &&
D.getDeclSpec().getTypeSpecWidth() == DeclSpec::TSW_longlong)
Diag(D.getDeclSpec().getTypeSpecWidthLoc(), diag::ext_longlong);
// Determine the type of the declarator. Not all forms of declarator
// have a type.
QualType T;
switch (D.getKind()) {
case Declarator::DK_Abstract:
case Declarator::DK_Normal:
case Declarator::DK_Operator: {
const DeclSpec& DS = D.getDeclSpec();
if (OmittedReturnType)
// We default to a dependent type initially. Can be modified by
// the first return statement.
T = Context.DependentTy;
else {
T = ConvertDeclSpecToType(DS);
if (T.isNull())
return T;
}
break;
}
case Declarator::DK_Constructor:
case Declarator::DK_Destructor:
case Declarator::DK_Conversion:
// Constructors and destructors don't have return types. Use
// "void" instead. Conversion operators will check their return
// types separately.
T = Context.VoidTy;
break;
}
// The name we're declaring, if any.
DeclarationName Name;
if (D.getIdentifier())
Name = D.getIdentifier();
// Walk the DeclTypeInfo, building the recursive type as we go.
// DeclTypeInfos are ordered from the identifier out, which is
// opposite of what we want :).
for (unsigned i = Skip, e = D.getNumTypeObjects(); i != e; ++i) {
DeclaratorChunk &DeclType = D.getTypeObject(e-i-1+Skip);
switch (DeclType.Kind) {
default: assert(0 && "Unknown decltype!");
case DeclaratorChunk::BlockPointer:
// If blocks are disabled, emit an error.
if (!LangOpts.Blocks)
Diag(DeclType.Loc, diag::err_blocks_disable);
if (DeclType.Cls.TypeQuals)
Diag(D.getIdentifierLoc(), diag::err_qualified_block_pointer_type);
if (!T.getTypePtr()->isFunctionType())
Diag(D.getIdentifierLoc(), diag::err_nonfunction_block_type);
else
T = Context.getBlockPointerType(T);
break;
case DeclaratorChunk::Pointer:
T = BuildPointerType(T, DeclType.Ptr.TypeQuals, DeclType.Loc, Name);
break;
case DeclaratorChunk::Reference:
T = BuildReferenceType(T, DeclType.Ref.LValueRef,
DeclType.Ref.HasRestrict ? QualType::Restrict : 0,
DeclType.Loc, Name);
break;
case DeclaratorChunk::Array: {
DeclaratorChunk::ArrayTypeInfo &ATI = DeclType.Arr;
Expr *ArraySize = static_cast<Expr*>(ATI.NumElts);
ArrayType::ArraySizeModifier ASM;
if (ATI.isStar)
ASM = ArrayType::Star;
else if (ATI.hasStatic)
ASM = ArrayType::Static;
else
ASM = ArrayType::Normal;
T = BuildArrayType(T, ASM, ArraySize, ATI.TypeQuals, DeclType.Loc, Name);
break;
}
case DeclaratorChunk::Function: {
// If the function declarator has a prototype (i.e. it is not () and
// does not have a K&R-style identifier list), then the arguments are part
// of the type, otherwise the argument list is ().
const DeclaratorChunk::FunctionTypeInfo &FTI = DeclType.Fun;
// C99 6.7.5.3p1: The return type may not be a function or array type.
if (T->isArrayType() || T->isFunctionType()) {
Diag(DeclType.Loc, diag::err_func_returning_array_function) << T;
T = Context.IntTy;
D.setInvalidType(true);
}
if (FTI.NumArgs == 0) {
if (getLangOptions().CPlusPlus) {
// C++ 8.3.5p2: If the parameter-declaration-clause is empty, the
// function takes no arguments.
T = Context.getFunctionType(T, NULL, 0, FTI.isVariadic,FTI.TypeQuals);
} else if (FTI.isVariadic) {
// We allow a zero-parameter variadic function in C if the
// function is marked with the "overloadable"
// attribute. Scan for this attribute now.
bool Overloadable = false;
for (const AttributeList *Attrs = D.getAttributes();
Attrs; Attrs = Attrs->getNext()) {
if (Attrs->getKind() == AttributeList::AT_overloadable) {
Overloadable = true;
break;
}
}
if (!Overloadable)
Diag(FTI.getEllipsisLoc(), diag::err_ellipsis_first_arg);
T = Context.getFunctionType(T, NULL, 0, FTI.isVariadic, 0);
} else {
// Simple void foo(), where the incoming T is the result type.
T = Context.getFunctionNoProtoType(T);
}
} else if (FTI.ArgInfo[0].Param == 0) {
// C99 6.7.5.3p3: Reject int(x,y,z) when it's not a function definition.
Diag(FTI.ArgInfo[0].IdentLoc, diag::err_ident_list_in_fn_declaration);
} else {
// Otherwise, we have a function with an argument list that is
// potentially variadic.
llvm::SmallVector<QualType, 16> ArgTys;
for (unsigned i = 0, e = FTI.NumArgs; i != e; ++i) {
ParmVarDecl *Param =
cast<ParmVarDecl>(FTI.ArgInfo[i].Param.getAs<Decl>());
QualType ArgTy = Param->getType();
assert(!ArgTy.isNull() && "Couldn't parse type?");
// Adjust the parameter type.
assert((ArgTy == adjustParameterType(ArgTy)) && "Unadjusted type?");
// Look for 'void'. void is allowed only as a single argument to a
// function with no other parameters (C99 6.7.5.3p10). We record
// int(void) as a FunctionProtoType with an empty argument list.
if (ArgTy->isVoidType()) {
// If this is something like 'float(int, void)', reject it. 'void'
// is an incomplete type (C99 6.2.5p19) and function decls cannot
// have arguments of incomplete type.
if (FTI.NumArgs != 1 || FTI.isVariadic) {
Diag(DeclType.Loc, diag::err_void_only_param);
ArgTy = Context.IntTy;
Param->setType(ArgTy);
} else if (FTI.ArgInfo[i].Ident) {
// Reject, but continue to parse 'int(void abc)'.
Diag(FTI.ArgInfo[i].IdentLoc,
diag::err_param_with_void_type);
ArgTy = Context.IntTy;
Param->setType(ArgTy);
} else {
// Reject, but continue to parse 'float(const void)'.
if (ArgTy.getCVRQualifiers())
Diag(DeclType.Loc, diag::err_void_param_qualified);
// Do not add 'void' to the ArgTys list.
break;
}
} else if (!FTI.hasPrototype) {
if (ArgTy->isPromotableIntegerType()) {
ArgTy = Context.IntTy;
} else if (const BuiltinType* BTy = ArgTy->getAsBuiltinType()) {
if (BTy->getKind() == BuiltinType::Float)
ArgTy = Context.DoubleTy;
}
}
ArgTys.push_back(ArgTy);
}
T = Context.getFunctionType(T, &ArgTys[0], ArgTys.size(),
FTI.isVariadic, FTI.TypeQuals);
}
break;
}
case DeclaratorChunk::MemberPointer:
// The scope spec must refer to a class, or be dependent.
DeclContext *DC = computeDeclContext(DeclType.Mem.Scope());
QualType ClsType;
// FIXME: Extend for dependent types when it's actually supported.
// See ActOnCXXNestedNameSpecifier.
if (CXXRecordDecl *RD = dyn_cast_or_null<CXXRecordDecl>(DC)) {
ClsType = Context.getTagDeclType(RD);
} else {
if (DC) {
Diag(DeclType.Mem.Scope().getBeginLoc(),
diag::err_illegal_decl_mempointer_in_nonclass)
<< (D.getIdentifier() ? D.getIdentifier()->getName() : "type name")
<< DeclType.Mem.Scope().getRange();
}
D.setInvalidType(true);
ClsType = Context.IntTy;
}
// C++ 8.3.3p3: A pointer to member shall not pointer to ... a member
// with reference type, or "cv void."
if (T->isReferenceType()) {
Diag(DeclType.Loc, diag::err_illegal_decl_pointer_to_reference)
<< (D.getIdentifier() ? D.getIdentifier()->getName() : "type name");
D.setInvalidType(true);
T = Context.IntTy;
}
if (T->isVoidType()) {
Diag(DeclType.Loc, diag::err_illegal_decl_mempointer_to_void)
<< (D.getIdentifier() ? D.getIdentifier()->getName() : "type name");
T = Context.IntTy;
}
// Enforce C99 6.7.3p2: "Types other than pointer types derived from
// object or incomplete types shall not be restrict-qualified."
if ((DeclType.Mem.TypeQuals & QualType::Restrict) &&
!T->isIncompleteOrObjectType()) {
Diag(DeclType.Loc, diag::err_typecheck_invalid_restrict_invalid_pointee)
<< T;
DeclType.Mem.TypeQuals &= ~QualType::Restrict;
}
T = Context.getMemberPointerType(T, ClsType.getTypePtr()).
getQualifiedType(DeclType.Mem.TypeQuals);
break;
}
if (T.isNull()) {
D.setInvalidType(true);
T = Context.IntTy;
}
// See if there are any attributes on this declarator chunk.
if (const AttributeList *AL = DeclType.getAttrs())
ProcessTypeAttributeList(T, AL);
}
if (getLangOptions().CPlusPlus && T->isFunctionType()) {
const FunctionProtoType *FnTy = T->getAsFunctionProtoType();
assert(FnTy && "Why oh why is there not a FunctionProtoType here ?");
// C++ 8.3.5p4: A cv-qualifier-seq shall only be part of the function type
// for a nonstatic member function, the function type to which a pointer
// to member refers, or the top-level function type of a function typedef
// declaration.
if (FnTy->getTypeQuals() != 0 &&
D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_typedef &&
((D.getContext() != Declarator::MemberContext &&
(!D.getCXXScopeSpec().isSet() ||
!computeDeclContext(D.getCXXScopeSpec())->isRecord())) ||
D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_static)) {
if (D.isFunctionDeclarator())
Diag(D.getIdentifierLoc(), diag::err_invalid_qualified_function_type);
else
Diag(D.getIdentifierLoc(),
diag::err_invalid_qualified_typedef_function_type_use);
// Strip the cv-quals from the type.
T = Context.getFunctionType(FnTy->getResultType(), FnTy->arg_type_begin(),
FnTy->getNumArgs(), FnTy->isVariadic(), 0);
}
}
// If there were any type attributes applied to the decl itself (not the
// type, apply the type attribute to the type!)
if (const AttributeList *Attrs = D.getAttributes())
ProcessTypeAttributeList(T, Attrs);
return T;
}
void Sema::ActOnStartOfLambdaDefinition(LambdaIntroducer &Intro,
Declarator &ParamInfo,
Scope *CurScope) {
// Determine if we're within a context where we know that the lambda will
// be dependent, because there are template parameters in scope.
bool KnownDependent = false;
if (Scope *TmplScope = CurScope->getTemplateParamParent())
if (!TmplScope->decl_empty())
KnownDependent = true;
CXXRecordDecl *Class = createLambdaClosureType(Intro.Range, KnownDependent);
// Determine the signature of the call operator.
TypeSourceInfo *MethodTyInfo;
bool ExplicitParams = true;
bool ExplicitResultType = true;
bool ContainsUnexpandedParameterPack = false;
SourceLocation EndLoc;
llvm::ArrayRef<ParmVarDecl *> Params;
if (ParamInfo.getNumTypeObjects() == 0) {
// C++11 [expr.prim.lambda]p4:
// If a lambda-expression does not include a lambda-declarator, it is as
// if the lambda-declarator were ().
FunctionProtoType::ExtProtoInfo EPI;
EPI.HasTrailingReturn = true;
EPI.TypeQuals |= DeclSpec::TQ_const;
QualType MethodTy = Context.getFunctionType(Context.DependentTy,
/*Args=*/0, /*NumArgs=*/0, EPI);
MethodTyInfo = Context.getTrivialTypeSourceInfo(MethodTy);
ExplicitParams = false;
ExplicitResultType = false;
EndLoc = Intro.Range.getEnd();
} else {
assert(ParamInfo.isFunctionDeclarator() &&
"lambda-declarator is a function");
DeclaratorChunk::FunctionTypeInfo &FTI = ParamInfo.getFunctionTypeInfo();
// C++11 [expr.prim.lambda]p5:
// This function call operator is declared const (9.3.1) if and only if
// the lambda-expression's parameter-declaration-clause is not followed
// by mutable. It is neither virtual nor declared volatile. [...]
if (!FTI.hasMutableQualifier())
FTI.TypeQuals |= DeclSpec::TQ_const;
MethodTyInfo = GetTypeForDeclarator(ParamInfo, CurScope);
assert(MethodTyInfo && "no type from lambda-declarator");
EndLoc = ParamInfo.getSourceRange().getEnd();
ExplicitResultType
= MethodTyInfo->getType()->getAs<FunctionType>()->getResultType()
!= Context.DependentTy;
TypeLoc TL = MethodTyInfo->getTypeLoc();
FunctionProtoTypeLoc Proto = cast<FunctionProtoTypeLoc>(TL);
Params = llvm::ArrayRef<ParmVarDecl *>(Proto.getParmArray(),
Proto.getNumArgs());
// Check for unexpanded parameter packs in the method type.
if (MethodTyInfo->getType()->containsUnexpandedParameterPack())
ContainsUnexpandedParameterPack = true;
}
CXXMethodDecl *Method = startLambdaDefinition(Class, Intro.Range,
MethodTyInfo, EndLoc, Params);
if (ExplicitParams)
CheckCXXDefaultArguments(Method);
// Attributes on the lambda apply to the method.
ProcessDeclAttributes(CurScope, Method, ParamInfo);
// Introduce the function call operator as the current declaration context.
PushDeclContext(CurScope, Method);
// Introduce the lambda scope.
LambdaScopeInfo *LSI
= enterLambdaScope(Method, Intro.Range, Intro.Default, ExplicitParams,
ExplicitResultType,
(Method->getTypeQualifiers() & Qualifiers::Const) == 0);
// Handle explicit captures.
SourceLocation PrevCaptureLoc
= Intro.Default == LCD_None? Intro.Range.getBegin() : Intro.DefaultLoc;
for (llvm::SmallVector<LambdaCapture, 4>::const_iterator
C = Intro.Captures.begin(),
E = Intro.Captures.end();
C != E;
PrevCaptureLoc = C->Loc, ++C) {
if (C->Kind == LCK_This) {
// C++11 [expr.prim.lambda]p8:
// An identifier or this shall not appear more than once in a
// lambda-capture.
if (LSI->isCXXThisCaptured()) {
Diag(C->Loc, diag::err_capture_more_than_once)
<< "'this'"
<< SourceRange(LSI->getCXXThisCapture().getLocation())
<< FixItHint::CreateRemoval(
SourceRange(PP.getLocForEndOfToken(PrevCaptureLoc), C->Loc));
continue;
}
// C++11 [expr.prim.lambda]p8:
// If a lambda-capture includes a capture-default that is =, the
// lambda-capture shall not contain this [...].
if (Intro.Default == LCD_ByCopy) {
Diag(C->Loc, diag::err_this_capture_with_copy_default)
<< FixItHint::CreateRemoval(
SourceRange(PP.getLocForEndOfToken(PrevCaptureLoc), C->Loc));
continue;
}
// C++11 [expr.prim.lambda]p12:
// If this is captured by a local lambda expression, its nearest
// enclosing function shall be a non-static member function.
QualType ThisCaptureType = getCurrentThisType();
if (ThisCaptureType.isNull()) {
Diag(C->Loc, diag::err_this_capture) << true;
continue;
}
CheckCXXThisCapture(C->Loc, /*Explicit=*/true);
continue;
}
assert(C->Id && "missing identifier for capture");
// C++11 [expr.prim.lambda]p8:
// If a lambda-capture includes a capture-default that is &, the
// identifiers in the lambda-capture shall not be preceded by &.
// If a lambda-capture includes a capture-default that is =, [...]
// each identifier it contains shall be preceded by &.
if (C->Kind == LCK_ByRef && Intro.Default == LCD_ByRef) {
Diag(C->Loc, diag::err_reference_capture_with_reference_default)
<< FixItHint::CreateRemoval(
SourceRange(PP.getLocForEndOfToken(PrevCaptureLoc), C->Loc));
continue;
} else if (C->Kind == LCK_ByCopy && Intro.Default == LCD_ByCopy) {
Diag(C->Loc, diag::err_copy_capture_with_copy_default)
<< FixItHint::CreateRemoval(
SourceRange(PP.getLocForEndOfToken(PrevCaptureLoc), C->Loc));
continue;
}
DeclarationNameInfo Name(C->Id, C->Loc);
LookupResult R(*this, Name, LookupOrdinaryName);
LookupName(R, CurScope);
if (R.isAmbiguous())
continue;
if (R.empty()) {
// FIXME: Disable corrections that would add qualification?
CXXScopeSpec ScopeSpec;
DeclFilterCCC<VarDecl> Validator;
if (DiagnoseEmptyLookup(CurScope, ScopeSpec, R, Validator))
continue;
}
// C++11 [expr.prim.lambda]p10:
// The identifiers in a capture-list are looked up using the usual rules
// for unqualified name lookup (3.4.1); each such lookup shall find a
// variable with automatic storage duration declared in the reaching
// scope of the local lambda expression.
//
// Note that the 'reaching scope' check happens in tryCaptureVariable().
VarDecl *Var = R.getAsSingle<VarDecl>();
if (!Var) {
Diag(C->Loc, diag::err_capture_does_not_name_variable) << C->Id;
continue;
}
if (!Var->hasLocalStorage()) {
Diag(C->Loc, diag::err_capture_non_automatic_variable) << C->Id;
Diag(Var->getLocation(), diag::note_previous_decl) << C->Id;
continue;
}
// C++11 [expr.prim.lambda]p8:
// An identifier or this shall not appear more than once in a
// lambda-capture.
if (LSI->isCaptured(Var)) {
Diag(C->Loc, diag::err_capture_more_than_once)
<< C->Id
<< SourceRange(LSI->getCapture(Var).getLocation())
<< FixItHint::CreateRemoval(
SourceRange(PP.getLocForEndOfToken(PrevCaptureLoc), C->Loc));
continue;
}
// C++11 [expr.prim.lambda]p23:
// A capture followed by an ellipsis is a pack expansion (14.5.3).
SourceLocation EllipsisLoc;
if (C->EllipsisLoc.isValid()) {
if (Var->isParameterPack()) {
EllipsisLoc = C->EllipsisLoc;
} else {
Diag(C->EllipsisLoc, diag::err_pack_expansion_without_parameter_packs)
<< SourceRange(C->Loc);
// Just ignore the ellipsis.
}
} else if (Var->isParameterPack()) {
ContainsUnexpandedParameterPack = true;
}
TryCaptureKind Kind = C->Kind == LCK_ByRef ? TryCapture_ExplicitByRef :
TryCapture_ExplicitByVal;
tryCaptureVariable(Var, C->Loc, Kind, EllipsisLoc);
}
finishLambdaExplicitCaptures(LSI);
LSI->ContainsUnexpandedParameterPack = ContainsUnexpandedParameterPack;
// Add lambda parameters into scope.
addLambdaParameters(Method, CurScope);
// Enter a new evaluation context to insulate the lambda from any
// cleanups from the enclosing full-expression.
PushExpressionEvaluationContext(PotentiallyEvaluated);
}
bool Sema::containsUnexpandedParameterPacks(Declarator &D) {
const DeclSpec &DS = D.getDeclSpec();
switch (DS.getTypeSpecType()) {
case TST_typename:
case TST_typeofType:
case TST_underlyingType:
case TST_atomic: {
QualType T = DS.getRepAsType().get();
if (!T.isNull() && T->containsUnexpandedParameterPack())
return true;
break;
}
case TST_typeofExpr:
case TST_decltype:
if (DS.getRepAsExpr() &&
DS.getRepAsExpr()->containsUnexpandedParameterPack())
return true;
break;
case TST_unspecified:
case TST_void:
case TST_char:
case TST_wchar:
case TST_char16:
case TST_char32:
case TST_int:
case TST_int128:
case TST_half:
case TST_float:
case TST_double:
case TST_bool:
case TST_decimal32:
case TST_decimal64:
case TST_decimal128:
case TST_enum:
case TST_union:
case TST_struct:
case TST_interface:
case TST_class:
case TST_auto:
case TST_unknown_anytype:
case TST_image1d_t:
case TST_image1d_array_t:
case TST_image1d_buffer_t:
case TST_image2d_t:
case TST_image2d_array_t:
case TST_image3d_t:
case TST_sampler_t:
case TST_event_t:
case TST_error:
break;
}
for (unsigned I = 0, N = D.getNumTypeObjects(); I != N; ++I) {
const DeclaratorChunk &Chunk = D.getTypeObject(I);
switch (Chunk.Kind) {
case DeclaratorChunk::Pointer:
case DeclaratorChunk::Reference:
case DeclaratorChunk::Paren:
// These declarator chunks cannot contain any parameter packs.
break;
case DeclaratorChunk::Array:
case DeclaratorChunk::Function:
case DeclaratorChunk::BlockPointer:
// Syntactically, these kinds of declarator chunks all come after the
// declarator-id (conceptually), so the parser should not invoke this
// routine at this time.
llvm_unreachable("Could not have seen this kind of declarator chunk");
case DeclaratorChunk::MemberPointer:
if (Chunk.Mem.Scope().getScopeRep() &&
Chunk.Mem.Scope().getScopeRep()->containsUnexpandedParameterPack())
return true;
break;
}
}
return false;
}
/// ParseKNRParamDeclarations - Parse 'declaration-list[opt]' which provides
/// types for a function with a K&R-style identifier list for arguments.
void Parser::ParseKNRParamDeclarations(Declarator &D) {
// We know that the top-level of this declarator is a function.
DeclaratorChunk::FunctionTypeInfo &FTI = D.getTypeObject(0).Fun;
// Enter function-declaration scope, limiting any declarators to the
// function prototype scope, including parameter declarators.
ParseScope PrototypeScope(this, Scope::FunctionPrototypeScope|Scope::DeclScope);
// Read all the argument declarations.
while (isDeclarationSpecifier()) {
SourceLocation DSStart = Tok.getLocation();
// Parse the common declaration-specifiers piece.
DeclSpec DS;
ParseDeclarationSpecifiers(DS);
// C99 6.9.1p6: 'each declaration in the declaration list shall have at
// least one declarator'.
// NOTE: GCC just makes this an ext-warn. It's not clear what it does with
// the declarations though. It's trivial to ignore them, really hard to do
// anything else with them.
if (Tok.is(tok::semi)) {
Diag(DSStart, diag::err_declaration_does_not_declare_param);
ConsumeToken();
continue;
}
// C99 6.9.1p6: Declarations shall contain no storage-class specifiers other
// than register.
if (DS.getStorageClassSpec() != DeclSpec::SCS_unspecified &&
DS.getStorageClassSpec() != DeclSpec::SCS_register) {
Diag(DS.getStorageClassSpecLoc(),
diag::err_invalid_storage_class_in_func_decl);
DS.ClearStorageClassSpecs();
}
if (DS.isThreadSpecified()) {
Diag(DS.getThreadSpecLoc(),
diag::err_invalid_storage_class_in_func_decl);
DS.ClearStorageClassSpecs();
}
// Parse the first declarator attached to this declspec.
Declarator ParmDeclarator(DS, Declarator::KNRTypeListContext);
ParseDeclarator(ParmDeclarator);
// Handle the full declarator list.
while (1) {
Action::AttrTy *AttrList;
// If attributes are present, parse them.
if (Tok.is(tok::kw___attribute))
// FIXME: attach attributes too.
AttrList = ParseAttributes();
// Ask the actions module to compute the type for this declarator.
Action::DeclPtrTy Param =
Actions.ActOnParamDeclarator(CurScope, ParmDeclarator);
if (Param &&
// A missing identifier has already been diagnosed.
ParmDeclarator.getIdentifier()) {
// Scan the argument list looking for the correct param to apply this
// type.
for (unsigned i = 0; ; ++i) {
// C99 6.9.1p6: those declarators shall declare only identifiers from
// the identifier list.
if (i == FTI.NumArgs) {
Diag(ParmDeclarator.getIdentifierLoc(), diag::err_no_matching_param)
<< ParmDeclarator.getIdentifier();
break;
}
if (FTI.ArgInfo[i].Ident == ParmDeclarator.getIdentifier()) {
// Reject redefinitions of parameters.
if (FTI.ArgInfo[i].Param) {
Diag(ParmDeclarator.getIdentifierLoc(),
diag::err_param_redefinition)
<< ParmDeclarator.getIdentifier();
} else {
FTI.ArgInfo[i].Param = Param;
}
break;
}
}
}
// If we don't have a comma, it is either the end of the list (a ';') or
// an error, bail out.
if (Tok.isNot(tok::comma))
break;
// Consume the comma.
ConsumeToken();
// Parse the next declarator.
ParmDeclarator.clear();
ParseDeclarator(ParmDeclarator);
}
if (Tok.is(tok::semi)) {
ConsumeToken();
} else {
Diag(Tok, diag::err_parse_error);
// Skip to end of block or statement
SkipUntil(tok::semi, true);
if (Tok.is(tok::semi))
ConsumeToken();
}
}
// The actions module must verify that all arguments were declared.
Actions.ActOnFinishKNRParamDeclarations(CurScope, D, Tok.getLocation());
}
bool Sema::containsUnexpandedParameterPacks(Declarator &D) {
const DeclSpec &DS = D.getDeclSpec();
switch (DS.getTypeSpecType()) {
case TST_typename:
case TST_typeofType:
case TST_underlyingType:
case TST_atomic: {
QualType T = DS.getRepAsType().get();
if (!T.isNull() && T->containsUnexpandedParameterPack())
return true;
break;
}
case TST_typeofExpr:
case TST_decltype:
if (DS.getRepAsExpr() &&
DS.getRepAsExpr()->containsUnexpandedParameterPack())
return true;
break;
case TST_unspecified:
case TST_void:
case TST_char:
case TST_wchar:
case TST_char16:
case TST_char32:
case TST_int:
case TST_int128:
case TST_half:
case TST_float:
case TST_double:
case TST_bool:
case TST_decimal32:
case TST_decimal64:
case TST_decimal128:
case TST_enum:
case TST_union:
case TST_struct:
case TST_interface:
case TST_class:
case TST_auto:
case TST_decltype_auto:
case TST_unknown_anytype:
case TST_error:
break;
}
for (unsigned I = 0, N = D.getNumTypeObjects(); I != N; ++I) {
const DeclaratorChunk &Chunk = D.getTypeObject(I);
switch (Chunk.Kind) {
case DeclaratorChunk::Pointer:
case DeclaratorChunk::Reference:
case DeclaratorChunk::Paren:
case DeclaratorChunk::BlockPointer:
// These declarator chunks cannot contain any parameter packs.
break;
case DeclaratorChunk::Array:
if (Chunk.Arr.NumElts &&
Chunk.Arr.NumElts->containsUnexpandedParameterPack())
return true;
break;
case DeclaratorChunk::Function:
for (unsigned i = 0, e = Chunk.Fun.NumParams; i != e; ++i) {
ParmVarDecl *Param = cast<ParmVarDecl>(Chunk.Fun.Params[i].Param);
QualType ParamTy = Param->getType();
assert(!ParamTy.isNull() && "Couldn't parse type?");
if (ParamTy->containsUnexpandedParameterPack()) return true;
}
if (Chunk.Fun.getExceptionSpecType() == EST_Dynamic) {
for (unsigned i = 0; i != Chunk.Fun.NumExceptions; ++i) {
if (Chunk.Fun.Exceptions[i]
.Ty.get()
->containsUnexpandedParameterPack())
return true;
}
} else if (Chunk.Fun.getExceptionSpecType() == EST_ComputedNoexcept &&
Chunk.Fun.NoexceptExpr->containsUnexpandedParameterPack())
return true;
if (Chunk.Fun.hasTrailingReturnType()) {
QualType T = Chunk.Fun.getTrailingReturnType().get();
if (!T.isNull() && T->containsUnexpandedParameterPack())
return true;
}
break;
case DeclaratorChunk::MemberPointer:
if (Chunk.Mem.Scope().getScopeRep() &&
Chunk.Mem.Scope().getScopeRep()->containsUnexpandedParameterPack())
return true;
break;
}
}
return false;
}
/// ParseFunctionDefinition - We parsed and verified that the specified
/// Declarator is well formed. If this is a K&R-style function, read the
/// parameters declaration-list, then start the compound-statement.
///
/// function-definition: [C99 6.9.1]
/// decl-specs declarator declaration-list[opt] compound-statement
/// [C90] function-definition: [C99 6.7.1] - implicit int result
/// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement
/// [C++] function-definition: [C++ 8.4]
/// decl-specifier-seq[opt] declarator ctor-initializer[opt]
/// function-body
/// [C++] function-definition: [C++ 8.4]
/// decl-specifier-seq[opt] declarator function-try-block
///
Parser::DeclPtrTy Parser::ParseFunctionDefinition(Declarator &D,
const ParsedTemplateInfo &TemplateInfo) {
const DeclaratorChunk &FnTypeInfo = D.getTypeObject(0);
assert(FnTypeInfo.Kind == DeclaratorChunk::Function &&
"This isn't a function declarator!");
const DeclaratorChunk::FunctionTypeInfo &FTI = FnTypeInfo.Fun;
// If this is C90 and the declspecs were completely missing, fudge in an
// implicit int. We do this here because this is the only place where
// declaration-specifiers are completely optional in the grammar.
if (getLang().ImplicitInt && D.getDeclSpec().isEmpty()) {
const char *PrevSpec;
unsigned DiagID;
D.getMutableDeclSpec().SetTypeSpecType(DeclSpec::TST_int,
D.getIdentifierLoc(),
PrevSpec, DiagID);
D.SetRangeBegin(D.getDeclSpec().getSourceRange().getBegin());
}
// If this declaration was formed with a K&R-style identifier list for the
// arguments, parse declarations for all of the args next.
// int foo(a,b) int a; float b; {}
if (!FTI.hasPrototype && FTI.NumArgs != 0)
ParseKNRParamDeclarations(D);
// We should have either an opening brace or, in a C++ constructor,
// we may have a colon.
if (Tok.isNot(tok::l_brace) && Tok.isNot(tok::colon) &&
Tok.isNot(tok::kw_try)) {
Diag(Tok, diag::err_expected_fn_body);
// Skip over garbage, until we get to '{'. Don't eat the '{'.
SkipUntil(tok::l_brace, true, true);
// If we didn't find the '{', bail out.
if (Tok.isNot(tok::l_brace))
return DeclPtrTy();
}
// Enter a scope for the function body.
ParseScope BodyScope(this, Scope::FnScope|Scope::DeclScope);
// Tell the actions module that we have entered a function definition with the
// specified Declarator for the function.
DeclPtrTy Res = TemplateInfo.TemplateParams?
Actions.ActOnStartOfFunctionTemplateDef(CurScope,
Action::MultiTemplateParamsArg(Actions,
TemplateInfo.TemplateParams->data(),
TemplateInfo.TemplateParams->size()),
D)
: Actions.ActOnStartOfFunctionDef(CurScope, D);
if (Tok.is(tok::kw_try))
return ParseFunctionTryBlock(Res);
// If we have a colon, then we're probably parsing a C++
// ctor-initializer.
if (Tok.is(tok::colon))
ParseConstructorInitializer(Res);
else
Actions.ActOnDefaultCtorInitializers(Res);
return ParseFunctionStatementBody(Res);
}