bool
UnnecessaryIncludeFinder::VisitTemplateSpecializationTypeLoc (
TemplateSpecializationTypeLoc typeLoc)
{
CXXRecordDecl* pCXXRecordDecl = typeLoc.getTypePtr()->getAsCXXRecordDecl();
if (pCXXRecordDecl) {
markUsed(pCXXRecordDecl->getLocation(), typeLoc.getTemplateNameLoc());
}
return true;
}
/**
* Once the recursive visitor has completed, this routine analyzes the
* MostDerivedTypeMap to find errors in the structure of the OMR classes
*/
void VerifyTypeStructure() {
trace("Starting Structure Verification");
for (std::map<CXXRecordDecl*, bool>::iterator I = Types.begin(), E=Types.end(); I != E; ++I) {
CXXRecordDecl * Type = I->first;
bool extensible = I->second;
trace(Type << " " << extensible << " " << getAssociatedConcreteType(Type));
if (extensible && !getAssociatedConcreteType(Type)) {
trace("xxxx Issue diagnostic because there's no associated concrete type");
continue;
}
if (extensible) { //Extnsible type .
trace("xxxx Verifying " << Type->getQualifiedNameAsString() << " has no non-extensible base classes." );
for (CXXRecordDecl::base_class_iterator BI = Type->bases_begin(), BE = Type->bases_end(); BI != BE; ++BI) {
CXXRecordDecl * base_class = BI->getType()->getAsCXXRecordDecl();
if (base_class
&& !isExtensible(base_class) // Ensure extensible parent.
&& !isOMRRootType(Type)) { // OMR Root type can have non-extensible parents.
//Base is not extensible, but an extensible type reaches it, with no concrete class in the middle.
//Issue diagnostic.
std::string diagnostic("OMR_EXTENSIBLE Type ");
diagnostic += Type->getQualifiedNameAsString();
diagnostic += " derives from ";
diagnostic += base_class->getQualifiedNameAsString();
diagnostic += " that is not marked as OMR_EXTENSIBLE.\n";
DiagnosticsEngine &diagEngine = Context->getDiagnostics();
unsigned diagID = diagEngine.getCustomDiagID(DiagnosticsEngine::Error, "%0");
diagEngine.Report(base_class->getLocation(), diagID) << diagnostic;
}
}
} else {
trace("xxxx Verifying " << Type->getQualifiedNameAsString() << " has no non-extensible base classes." );
for (CXXRecordDecl::base_class_iterator BI = Type->bases_begin(), BE = Type->bases_end(); BI != BE; ++BI) {
CXXRecordDecl * base_class = BI->getType()->getAsCXXRecordDecl();
if (base_class && isExtensible(base_class) && !isOMRConcreteType(base_class)) {
//Base is not extensible, but an extensible type reaches it, with no concrete class in the middle.
//Issue diagnostic.
std::string diagnostic("Type ");
diagnostic += Type->getQualifiedNameAsString();
diagnostic += " derives from ";
diagnostic += base_class->getQualifiedNameAsString();
diagnostic += " that is marked as OMR_EXTENSIBLE.\n";
DiagnosticsEngine &diagEngine = Context->getDiagnostics();
unsigned diagID = diagEngine.getCustomDiagID(DiagnosticsEngine::Error, "%0");
diagEngine.Report(Type->getLocation(), diagID) << diagnostic;
}
}
}
} //each most derived type
}
void Sema::ActOnLambdaError(SourceLocation StartLoc, Scope *CurScope,
bool IsInstantiation) {
// Leave the expression-evaluation context.
DiscardCleanupsInEvaluationContext();
PopExpressionEvaluationContext();
// Leave the context of the lambda.
if (!IsInstantiation)
PopDeclContext();
// Finalize the lambda.
LambdaScopeInfo *LSI = getCurLambda();
CXXRecordDecl *Class = LSI->Lambda;
Class->setInvalidDecl();
SmallVector<Decl*, 4> Fields(Class->field_begin(), Class->field_end());
ActOnFields(0, Class->getLocation(), Class, Fields,
SourceLocation(), SourceLocation(), 0);
CheckCompletedCXXClass(Class);
PopFunctionScopeInfo();
}
OMPClause *Sema::ActOnOpenMPFirstprivateClause(ArrayRef<Expr *> VarList,
SourceLocation StartLoc,
SourceLocation LParenLoc,
SourceLocation EndLoc) {
SmallVector<Expr *, 8> Vars;
for (ArrayRef<Expr *>::iterator I = VarList.begin(), E = VarList.end();
I != E; ++I) {
assert(*I && "NULL expr in OpenMP firstprivate clause.");
if (isa<DependentScopeDeclRefExpr>(*I)) {
// It will be analyzed later.
Vars.push_back(*I);
continue;
}
SourceLocation ELoc = (*I)->getExprLoc();
// OpenMP [2.1, C/C++]
// A list item is a variable name.
// OpenMP [2.9.3.3, Restrictions, p.1]
// A variable that is part of another variable (as an array or
// structure element) cannot appear in a private clause.
DeclRefExpr *DE = dyn_cast_or_null<DeclRefExpr>(*I);
if (!DE || !isa<VarDecl>(DE->getDecl())) {
Diag(ELoc, diag::err_omp_expected_var_name)
<< (*I)->getSourceRange();
continue;
}
Decl *D = DE->getDecl();
VarDecl *VD = cast<VarDecl>(D);
QualType Type = VD->getType();
if (Type->isDependentType() || Type->isInstantiationDependentType()) {
// It will be analyzed later.
Vars.push_back(DE);
continue;
}
// OpenMP [2.9.3.3, Restrictions, C/C++, p.3]
// A variable that appears in a private clause must not have an incomplete
// type or a reference type.
if (RequireCompleteType(ELoc, Type,
diag::err_omp_firstprivate_incomplete_type)) {
continue;
}
if (Type->isReferenceType()) {
Diag(ELoc, diag::err_omp_clause_ref_type_arg)
<< getOpenMPClauseName(OMPC_firstprivate) << Type;
bool IsDecl = VD->isThisDeclarationADefinition(Context) ==
VarDecl::DeclarationOnly;
Diag(VD->getLocation(), IsDecl ? diag::note_previous_decl :
diag::note_defined_here) << VD;
continue;
}
// OpenMP [2.9.3.4, Restrictions, C/C++, p.1]
// A variable of class type (or array thereof) that appears in a private
// clause requires an accesible, unambiguous copy constructor for the
// class type.
Type = Context.getBaseElementType(Type);
CXXRecordDecl *RD = getLangOpts().CPlusPlus ?
Type.getNonReferenceType()->getAsCXXRecordDecl() : 0;
if (RD) {
CXXConstructorDecl *CD = LookupCopyingConstructor(RD, 0);
PartialDiagnostic PD =
PartialDiagnostic(PartialDiagnostic::NullDiagnostic());
if (!CD ||
CheckConstructorAccess(ELoc, CD,
InitializedEntity::InitializeTemporary(Type),
CD->getAccess(), PD) == AR_inaccessible ||
CD->isDeleted()) {
Diag(ELoc, diag::err_omp_required_method)
<< getOpenMPClauseName(OMPC_firstprivate) << 1;
bool IsDecl = VD->isThisDeclarationADefinition(Context) ==
VarDecl::DeclarationOnly;
Diag(VD->getLocation(), IsDecl ? diag::note_previous_decl :
diag::note_defined_here) << VD;
Diag(RD->getLocation(), diag::note_previous_decl) << RD;
continue;
}
MarkFunctionReferenced(ELoc, CD);
DiagnoseUseOfDecl(CD, ELoc);
CXXDestructorDecl *DD = RD->getDestructor();
if (DD) {
if (CheckDestructorAccess(ELoc, DD, PD) == AR_inaccessible ||
DD->isDeleted()) {
Diag(ELoc, diag::err_omp_required_method)
<< getOpenMPClauseName(OMPC_firstprivate) << 4;
bool IsDecl = VD->isThisDeclarationADefinition(Context) ==
VarDecl::DeclarationOnly;
Diag(VD->getLocation(), IsDecl ? diag::note_previous_decl :
diag::note_defined_here) << VD;
Diag(RD->getLocation(), diag::note_previous_decl) << RD;
continue;
}
MarkFunctionReferenced(ELoc, DD);
DiagnoseUseOfDecl(DD, ELoc);
}
}
// If StartLoc and EndLoc are invalid - this is an implicit firstprivate
// variable and it was checked already.
if (StartLoc.isValid() && EndLoc.isValid()) {
DSAStackTy::DSAVarData DVar = DSAStack->getTopDSA(VD);
Type = Type.getNonReferenceType().getCanonicalType();
bool IsConstant = Type.isConstant(Context);
Type = Context.getBaseElementType(Type);
// OpenMP [2.4.13, Data-sharing Attribute Clauses]
// A list item that specifies a given variable may not appear in more
// than one clause on the same directive, except that a variable may be
// specified in both firstprivate and lastprivate clauses.
// TODO: add processing for lastprivate.
if (DVar.CKind != OMPC_unknown && DVar.CKind != OMPC_firstprivate &&
DVar.RefExpr) {
Diag(ELoc, diag::err_omp_wrong_dsa)
<< getOpenMPClauseName(DVar.CKind)
<< getOpenMPClauseName(OMPC_firstprivate);
Diag(DVar.RefExpr->getExprLoc(), diag::note_omp_explicit_dsa)
<< getOpenMPClauseName(DVar.CKind);
continue;
}
// OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
// in a Construct]
// Variables with the predetermined data-sharing attributes may not be
// listed in data-sharing attributes clauses, except for the cases
// listed below. For these exceptions only, listing a predetermined
// variable in a data-sharing attribute clause is allowed and overrides
// the variable's predetermined data-sharing attributes.
// OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
// in a Construct, C/C++, p.2]
// Variables with const-qualified type having no mutable member may be
// listed in a firstprivate clause, even if they are static data members.
if (!(IsConstant || VD->isStaticDataMember()) && !DVar.RefExpr &&
DVar.CKind != OMPC_unknown && DVar.CKind != OMPC_shared) {
Diag(ELoc, diag::err_omp_wrong_dsa)
<< getOpenMPClauseName(DVar.CKind)
<< getOpenMPClauseName(OMPC_firstprivate);
Diag(VD->getLocation(), diag::note_omp_predetermined_dsa)
<< getOpenMPClauseName(DVar.CKind);
continue;
}
// OpenMP [2.9.3.4, Restrictions, p.2]
// A list item that is private within a parallel region must not appear
// in a firstprivate clause on a worksharing construct if any of the
// worksharing regions arising from the worksharing construct ever bind
// to any of the parallel regions arising from the parallel construct.
// OpenMP [2.9.3.4, Restrictions, p.3]
// A list item that appears in a reduction clause of a parallel construct
// must not appear in a firstprivate clause on a worksharing or task
// construct if any of the worksharing or task regions arising from the
// worksharing or task construct ever bind to any of the parallel regions
// arising from the parallel construct.
// OpenMP [2.9.3.4, Restrictions, p.4]
// A list item that appears in a reduction clause in worksharing
// construct must not appear in a firstprivate clause in a task construct
// encountered during execution of any of the worksharing regions arising
// from the worksharing construct.
// TODO:
}
DSAStack->addDSA(VD, DE, OMPC_firstprivate);
Vars.push_back(DE);
}
if (Vars.empty()) return 0;
return OMPFirstprivateClause::Create(Context, StartLoc, LParenLoc, EndLoc,
Vars);
}
OMPClause *Sema::ActOnOpenMPPrivateClause(ArrayRef<Expr *> VarList,
SourceLocation StartLoc,
SourceLocation LParenLoc,
SourceLocation EndLoc) {
SmallVector<Expr *, 8> Vars;
for (ArrayRef<Expr *>::iterator I = VarList.begin(), E = VarList.end();
I != E; ++I) {
assert(*I && "NULL expr in OpenMP private clause.");
if (isa<DependentScopeDeclRefExpr>(*I)) {
// It will be analyzed later.
Vars.push_back(*I);
continue;
}
SourceLocation ELoc = (*I)->getExprLoc();
// OpenMP [2.1, C/C++]
// A list item is a variable name.
// OpenMP [2.9.3.3, Restrictions, p.1]
// A variable that is part of another variable (as an array or
// structure element) cannot appear in a private clause.
DeclRefExpr *DE = dyn_cast_or_null<DeclRefExpr>(*I);
if (!DE || !isa<VarDecl>(DE->getDecl())) {
Diag(ELoc, diag::err_omp_expected_var_name)
<< (*I)->getSourceRange();
continue;
}
Decl *D = DE->getDecl();
VarDecl *VD = cast<VarDecl>(D);
QualType Type = VD->getType();
if (Type->isDependentType() || Type->isInstantiationDependentType()) {
// It will be analyzed later.
Vars.push_back(DE);
continue;
}
// OpenMP [2.9.3.3, Restrictions, C/C++, p.3]
// A variable that appears in a private clause must not have an incomplete
// type or a reference type.
if (RequireCompleteType(ELoc, Type,
diag::err_omp_private_incomplete_type)) {
continue;
}
if (Type->isReferenceType()) {
Diag(ELoc, diag::err_omp_clause_ref_type_arg)
<< getOpenMPClauseName(OMPC_private) << Type;
bool IsDecl = VD->isThisDeclarationADefinition(Context) ==
VarDecl::DeclarationOnly;
Diag(VD->getLocation(), IsDecl ? diag::note_previous_decl :
diag::note_defined_here) << VD;
continue;
}
// OpenMP [2.9.3.3, Restrictions, C/C++, p.1]
// A variable of class type (or array thereof) that appears in a private
// clause requires an accesible, unambiguous default constructor for the
// class type.
while (Type.getNonReferenceType()->isArrayType()) {
Type = cast<ArrayType>(
Type.getNonReferenceType().getTypePtr())->getElementType();
}
CXXRecordDecl *RD = getLangOpts().CPlusPlus ?
Type.getNonReferenceType()->getAsCXXRecordDecl() : 0;
if (RD) {
CXXConstructorDecl *CD = LookupDefaultConstructor(RD);
PartialDiagnostic PD =
PartialDiagnostic(PartialDiagnostic::NullDiagnostic());
if (!CD ||
CheckConstructorAccess(ELoc, CD,
InitializedEntity::InitializeTemporary(Type),
CD->getAccess(), PD) == AR_inaccessible ||
CD->isDeleted()) {
Diag(ELoc, diag::err_omp_required_method)
<< getOpenMPClauseName(OMPC_private) << 0;
bool IsDecl = VD->isThisDeclarationADefinition(Context) ==
VarDecl::DeclarationOnly;
Diag(VD->getLocation(), IsDecl ? diag::note_previous_decl :
diag::note_defined_here) << VD;
Diag(RD->getLocation(), diag::note_previous_decl) << RD;
continue;
}
MarkFunctionReferenced(ELoc, CD);
DiagnoseUseOfDecl(CD, ELoc);
CXXDestructorDecl *DD = RD->getDestructor();
if (DD) {
if (CheckDestructorAccess(ELoc, DD, PD) == AR_inaccessible ||
DD->isDeleted()) {
Diag(ELoc, diag::err_omp_required_method)
<< getOpenMPClauseName(OMPC_private) << 4;
bool IsDecl = VD->isThisDeclarationADefinition(Context) ==
VarDecl::DeclarationOnly;
Diag(VD->getLocation(), IsDecl ? diag::note_previous_decl :
diag::note_defined_here) << VD;
Diag(RD->getLocation(), diag::note_previous_decl) << RD;
continue;
}
MarkFunctionReferenced(ELoc, DD);
DiagnoseUseOfDecl(DD, ELoc);
}
}
// OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
// in a Construct]
// Variables with the predetermined data-sharing attributes may not be
// listed in data-sharing attributes clauses, except for the cases
// listed below. For these exceptions only, listing a predetermined
// variable in a data-sharing attribute clause is allowed and overrides
// the variable's predetermined data-sharing attributes.
DSAStackTy::DSAVarData DVar = DSAStack->getTopDSA(VD);
if (DVar.CKind != OMPC_unknown && DVar.CKind != OMPC_private) {
Diag(ELoc, diag::err_omp_wrong_dsa)
<< getOpenMPClauseName(DVar.CKind)
<< getOpenMPClauseName(OMPC_private);
if (DVar.RefExpr) {
Diag(DVar.RefExpr->getExprLoc(), diag::note_omp_explicit_dsa)
<< getOpenMPClauseName(DVar.CKind);
} else {
Diag(VD->getLocation(), diag::note_omp_predetermined_dsa)
<< getOpenMPClauseName(DVar.CKind);
}
continue;
}
DSAStack->addDSA(VD, DE, OMPC_private);
Vars.push_back(DE);
}
if (Vars.empty()) return 0;
return OMPPrivateClause::Create(Context, StartLoc, LParenLoc, EndLoc, Vars);
}
ExprResult Sema::ActOnLambdaExpr(SourceLocation StartLoc, Stmt *Body,
Scope *CurScope,
bool IsInstantiation) {
// Collect information from the lambda scope.
llvm::SmallVector<LambdaExpr::Capture, 4> Captures;
llvm::SmallVector<Expr *, 4> CaptureInits;
LambdaCaptureDefault CaptureDefault;
CXXRecordDecl *Class;
CXXMethodDecl *CallOperator;
SourceRange IntroducerRange;
bool ExplicitParams;
bool ExplicitResultType;
bool LambdaExprNeedsCleanups;
bool ContainsUnexpandedParameterPack;
llvm::SmallVector<VarDecl *, 4> ArrayIndexVars;
llvm::SmallVector<unsigned, 4> ArrayIndexStarts;
{
LambdaScopeInfo *LSI = getCurLambda();
CallOperator = LSI->CallOperator;
Class = LSI->Lambda;
IntroducerRange = LSI->IntroducerRange;
ExplicitParams = LSI->ExplicitParams;
ExplicitResultType = !LSI->HasImplicitReturnType;
LambdaExprNeedsCleanups = LSI->ExprNeedsCleanups;
ContainsUnexpandedParameterPack = LSI->ContainsUnexpandedParameterPack;
ArrayIndexVars.swap(LSI->ArrayIndexVars);
ArrayIndexStarts.swap(LSI->ArrayIndexStarts);
// Translate captures.
for (unsigned I = 0, N = LSI->Captures.size(); I != N; ++I) {
LambdaScopeInfo::Capture From = LSI->Captures[I];
assert(!From.isBlockCapture() && "Cannot capture __block variables");
bool IsImplicit = I >= LSI->NumExplicitCaptures;
// Handle 'this' capture.
if (From.isThisCapture()) {
Captures.push_back(LambdaExpr::Capture(From.getLocation(),
IsImplicit,
LCK_This));
CaptureInits.push_back(new (Context) CXXThisExpr(From.getLocation(),
getCurrentThisType(),
/*isImplicit=*/true));
continue;
}
VarDecl *Var = From.getVariable();
LambdaCaptureKind Kind = From.isCopyCapture()? LCK_ByCopy : LCK_ByRef;
Captures.push_back(LambdaExpr::Capture(From.getLocation(), IsImplicit,
Kind, Var, From.getEllipsisLoc()));
CaptureInits.push_back(From.getCopyExpr());
}
switch (LSI->ImpCaptureStyle) {
case CapturingScopeInfo::ImpCap_None:
CaptureDefault = LCD_None;
break;
case CapturingScopeInfo::ImpCap_LambdaByval:
CaptureDefault = LCD_ByCopy;
break;
case CapturingScopeInfo::ImpCap_LambdaByref:
CaptureDefault = LCD_ByRef;
break;
case CapturingScopeInfo::ImpCap_Block:
llvm_unreachable("block capture in lambda");
break;
}
// C++11 [expr.prim.lambda]p4:
// If a lambda-expression does not include a
// trailing-return-type, it is as if the trailing-return-type
// denotes the following type:
// FIXME: Assumes current resolution to core issue 975.
if (LSI->HasImplicitReturnType) {
deduceClosureReturnType(*LSI);
// - if there are no return statements in the
// compound-statement, or all return statements return
// either an expression of type void or no expression or
// braced-init-list, the type void;
if (LSI->ReturnType.isNull()) {
LSI->ReturnType = Context.VoidTy;
}
// Create a function type with the inferred return type.
const FunctionProtoType *Proto
= CallOperator->getType()->getAs<FunctionProtoType>();
QualType FunctionTy
= Context.getFunctionType(LSI->ReturnType,
Proto->arg_type_begin(),
Proto->getNumArgs(),
Proto->getExtProtoInfo());
CallOperator->setType(FunctionTy);
}
// C++ [expr.prim.lambda]p7:
// The lambda-expression's compound-statement yields the
// function-body (8.4) of the function call operator [...].
ActOnFinishFunctionBody(CallOperator, Body, IsInstantiation);
CallOperator->setLexicalDeclContext(Class);
Class->addDecl(CallOperator);
PopExpressionEvaluationContext();
// C++11 [expr.prim.lambda]p6:
// The closure type for a lambda-expression with no lambda-capture
// has a public non-virtual non-explicit const conversion function
// to pointer to function having the same parameter and return
// types as the closure type's function call operator.
if (Captures.empty() && CaptureDefault == LCD_None)
addFunctionPointerConversion(*this, IntroducerRange, Class,
CallOperator);
// Objective-C++:
// The closure type for a lambda-expression has a public non-virtual
// non-explicit const conversion function to a block pointer having the
// same parameter and return types as the closure type's function call
// operator.
if (getLangOpts().Blocks && getLangOpts().ObjC1)
addBlockPointerConversion(*this, IntroducerRange, Class, CallOperator);
// Finalize the lambda class.
SmallVector<Decl*, 4> Fields;
for (RecordDecl::field_iterator i = Class->field_begin(),
e = Class->field_end(); i != e; ++i)
Fields.push_back(*i);
ActOnFields(0, Class->getLocation(), Class, Fields,
SourceLocation(), SourceLocation(), 0);
CheckCompletedCXXClass(Class);
}
if (LambdaExprNeedsCleanups)
ExprNeedsCleanups = true;
LambdaExpr *Lambda = LambdaExpr::Create(Context, Class, IntroducerRange,
CaptureDefault, Captures,
ExplicitParams, ExplicitResultType,
CaptureInits, ArrayIndexVars,
ArrayIndexStarts, Body->getLocEnd(),
ContainsUnexpandedParameterPack);
// C++11 [expr.prim.lambda]p2:
// A lambda-expression shall not appear in an unevaluated operand
// (Clause 5).
if (!CurContext->isDependentContext()) {
switch (ExprEvalContexts.back().Context) {
case Unevaluated:
// We don't actually diagnose this case immediately, because we
// could be within a context where we might find out later that
// the expression is potentially evaluated (e.g., for typeid).
ExprEvalContexts.back().Lambdas.push_back(Lambda);
break;
case ConstantEvaluated:
case PotentiallyEvaluated:
case PotentiallyEvaluatedIfUsed:
break;
}
}
return MaybeBindToTemporary(Lambda);
}
ExprResult Sema::ActOnLambdaExpr(SourceLocation StartLoc, Stmt *Body,
Scope *CurScope,
llvm::Optional<unsigned> ManglingNumber,
Decl *ContextDecl,
bool IsInstantiation) {
// Collect information from the lambda scope.
llvm::SmallVector<LambdaExpr::Capture, 4> Captures;
llvm::SmallVector<Expr *, 4> CaptureInits;
LambdaCaptureDefault CaptureDefault;
CXXRecordDecl *Class;
CXXMethodDecl *CallOperator;
SourceRange IntroducerRange;
bool ExplicitParams;
bool ExplicitResultType;
bool LambdaExprNeedsCleanups;
llvm::SmallVector<VarDecl *, 4> ArrayIndexVars;
llvm::SmallVector<unsigned, 4> ArrayIndexStarts;
{
LambdaScopeInfo *LSI = getCurLambda();
CallOperator = LSI->CallOperator;
Class = LSI->Lambda;
IntroducerRange = LSI->IntroducerRange;
ExplicitParams = LSI->ExplicitParams;
ExplicitResultType = !LSI->HasImplicitReturnType;
LambdaExprNeedsCleanups = LSI->ExprNeedsCleanups;
ArrayIndexVars.swap(LSI->ArrayIndexVars);
ArrayIndexStarts.swap(LSI->ArrayIndexStarts);
// Translate captures.
for (unsigned I = 0, N = LSI->Captures.size(); I != N; ++I) {
LambdaScopeInfo::Capture From = LSI->Captures[I];
assert(!From.isBlockCapture() && "Cannot capture __block variables");
bool IsImplicit = I >= LSI->NumExplicitCaptures;
// Handle 'this' capture.
if (From.isThisCapture()) {
Captures.push_back(LambdaExpr::Capture(From.getLocation(),
IsImplicit,
LCK_This));
CaptureInits.push_back(new (Context) CXXThisExpr(From.getLocation(),
getCurrentThisType(),
/*isImplicit=*/true));
continue;
}
VarDecl *Var = From.getVariable();
LambdaCaptureKind Kind = From.isCopyCapture()? LCK_ByCopy : LCK_ByRef;
Captures.push_back(LambdaExpr::Capture(From.getLocation(), IsImplicit,
Kind, Var, From.getEllipsisLoc()));
CaptureInits.push_back(From.getCopyExpr());
}
switch (LSI->ImpCaptureStyle) {
case CapturingScopeInfo::ImpCap_None:
CaptureDefault = LCD_None;
break;
case CapturingScopeInfo::ImpCap_LambdaByval:
CaptureDefault = LCD_ByCopy;
break;
case CapturingScopeInfo::ImpCap_LambdaByref:
CaptureDefault = LCD_ByRef;
break;
case CapturingScopeInfo::ImpCap_Block:
llvm_unreachable("block capture in lambda");
break;
}
// C++11 [expr.prim.lambda]p4:
// If a lambda-expression does not include a
// trailing-return-type, it is as if the trailing-return-type
// denotes the following type:
// FIXME: Assumes current resolution to core issue 975.
if (LSI->HasImplicitReturnType) {
// - if there are no return statements in the
// compound-statement, or all return statements return
// either an expression of type void or no expression or
// braced-init-list, the type void;
if (LSI->ReturnType.isNull()) {
LSI->ReturnType = Context.VoidTy;
} else {
// C++11 [expr.prim.lambda]p4:
// - if the compound-statement is of the form
//
// { attribute-specifier-seq[opt] return expression ; }
//
// the type of the returned expression after
// lvalue-to-rvalue conversion (4.1), array-to-pointer
// conver- sion (4.2), and function-to-pointer conversion
// (4.3);
//
// Since we're accepting the resolution to a post-C++11 core
// issue with a non-trivial extension, provide a warning (by
// default).
CompoundStmt *CompoundBody = cast<CompoundStmt>(Body);
if (!(CompoundBody->size() == 1 &&
isa<ReturnStmt>(*CompoundBody->body_begin())) &&
!Context.hasSameType(LSI->ReturnType, Context.VoidTy))
Diag(IntroducerRange.getBegin(),
diag::ext_lambda_implies_void_return);
}
// Create a function type with the inferred return type.
const FunctionProtoType *Proto
= CallOperator->getType()->getAs<FunctionProtoType>();
QualType FunctionTy
= Context.getFunctionType(LSI->ReturnType,
Proto->arg_type_begin(),
Proto->getNumArgs(),
Proto->getExtProtoInfo());
CallOperator->setType(FunctionTy);
}
// C++ [expr.prim.lambda]p7:
// The lambda-expression's compound-statement yields the
// function-body (8.4) of the function call operator [...].
ActOnFinishFunctionBody(CallOperator, Body, IsInstantiation);
CallOperator->setLexicalDeclContext(Class);
Class->addDecl(CallOperator);
PopExpressionEvaluationContext();
// C++11 [expr.prim.lambda]p6:
// The closure type for a lambda-expression with no lambda-capture
// has a public non-virtual non-explicit const conversion function
// to pointer to function having the same parameter and return
// types as the closure type's function call operator.
if (Captures.empty() && CaptureDefault == LCD_None)
addFunctionPointerConversion(*this, IntroducerRange, Class,
CallOperator);
// Objective-C++:
// The closure type for a lambda-expression has a public non-virtual
// non-explicit const conversion function to a block pointer having the
// same parameter and return types as the closure type's function call
// operator.
if (getLangOpts().Blocks && getLangOpts().ObjC1)
addBlockPointerConversion(*this, IntroducerRange, Class, CallOperator);
// Finalize the lambda class.
SmallVector<Decl*, 4> Fields(Class->field_begin(), Class->field_end());
ActOnFields(0, Class->getLocation(), Class, Fields,
SourceLocation(), SourceLocation(), 0);
CheckCompletedCXXClass(Class);
}
if (LambdaExprNeedsCleanups)
ExprNeedsCleanups = true;
// If we don't already have a mangling number for this lambda expression,
// allocate one now.
if (!ManglingNumber) {
ContextDecl = ExprEvalContexts.back().LambdaContextDecl;
enum ContextKind {
Normal,
DefaultArgument,
DataMember,
StaticDataMember
} Kind = Normal;
// Default arguments of member function parameters that appear in a class
// definition, as well as the initializers of data members, receive special
// treatment. Identify them.
if (ContextDecl) {
if (ParmVarDecl *Param = dyn_cast<ParmVarDecl>(ContextDecl)) {
if (const DeclContext *LexicalDC
= Param->getDeclContext()->getLexicalParent())
if (LexicalDC->isRecord())
Kind = DefaultArgument;
} else if (VarDecl *Var = dyn_cast<VarDecl>(ContextDecl)) {
if (Var->getDeclContext()->isRecord())
Kind = StaticDataMember;
} else if (isa<FieldDecl>(ContextDecl)) {
Kind = DataMember;
}
}
switch (Kind) {
case Normal:
if (CurContext->isDependentContext() || isInInlineFunction(CurContext))
ManglingNumber = Context.getLambdaManglingNumber(CallOperator);
else
ManglingNumber = 0;
// There is no special context for this lambda.
ContextDecl = 0;
break;
case StaticDataMember:
if (!CurContext->isDependentContext()) {
ManglingNumber = 0;
ContextDecl = 0;
break;
}
// Fall through to assign a mangling number.
case DataMember:
case DefaultArgument:
ManglingNumber = ExprEvalContexts.back().getLambdaMangleContext()
.getManglingNumber(CallOperator);
break;
}
}
LambdaExpr *Lambda = LambdaExpr::Create(Context, Class, IntroducerRange,
CaptureDefault, Captures,
ExplicitParams, ExplicitResultType,
CaptureInits, ArrayIndexVars,
ArrayIndexStarts, Body->getLocEnd(),
*ManglingNumber, ContextDecl);
// C++11 [expr.prim.lambda]p2:
// A lambda-expression shall not appear in an unevaluated operand
// (Clause 5).
if (!CurContext->isDependentContext()) {
switch (ExprEvalContexts.back().Context) {
case Unevaluated:
// We don't actually diagnose this case immediately, because we
// could be within a context where we might find out later that
// the expression is potentially evaluated (e.g., for typeid).
ExprEvalContexts.back().Lambdas.push_back(Lambda);
break;
case ConstantEvaluated:
case PotentiallyEvaluated:
case PotentiallyEvaluatedIfUsed:
break;
}
}
return MaybeBindToTemporary(Lambda);
}
