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authorDimitry Andric <dim@FreeBSD.org>2021-01-26 13:07:47 +0000
committerDimitry Andric <dim@FreeBSD.org>2021-01-26 16:51:25 +0000
commite63539f3059728ff58328ac0ecb2a7bf4e2f08e8 (patch)
tree0a943f728f3164b3e5f315d970f56408cd175a29
parentcfd6422a5217410fbd66f7a7a8a64d9d85e61229 (diff)
downloadsrc-e63539f3059728ff58328ac0ecb2a7bf4e2f08e8.tar.gz
src-e63539f3059728ff58328ac0ecb2a7bf4e2f08e8.zip
Fix clang assertion when compiling the devel/onetbb port
Merge commit 740a164de from llvm git (by Richard Smith): PR46377: Fix dependence calculation for function types and typedef types. We previously did not treat a function type as dependent if it had a parameter pack with a non-dependent type -- such a function type depends on the arity of the pack so is dependent even though none of the parameter types is dependent. In order to properly handle this, we now treat pack expansion types as always being dependent types (depending on at least the pack arity), and always canonically being pack expansion types, even in the unusual case when the pattern is not a dependent type. This does mean that we can have canonical types that are pack expansions that contain no unexpanded packs, which is unfortunate but not inaccurate. We also previously did not treat a typedef type as instantiation-dependent if its canonical type was not instantiation-dependent. That's wrong because instantiation-dependence is a property of the type sugar, not of the type; an instantiation-dependent type can have a non-instantiation-dependent canonical type. Merge commit 9cf98d26e from llvm git (by Richard Smith): PR46637: Fix handling of placeholder types in trailing-return-types. Only permit a placeholder type in a trailing-return-type if it would also have been permitted in the decl-specifier sequence of a corresponding declaration with no trailing-return-type. The standard doesn't actually say this, but this is the only thing that makes sense. Also fix handling of an 'auto' in a trailing-return-type in a parameter of a generic lambda. We used to crash if we saw such a thing. Merge commit 234f51a65 from llvm git (by Richard Smith): Don't crash if we deserialize a pack expansion type whose pattern contains no packs. Fixes a regression from 740a164dec483225cbd02ab6c82199e2747ffacb. PR: 252892 Reported by: thierry MFC after: 3 days
-rw-r--r--contrib/llvm-project/clang/include/clang/AST/ASTContext.h10
-rw-r--r--contrib/llvm-project/clang/include/clang/AST/Type.h13
-rw-r--r--contrib/llvm-project/clang/include/clang/AST/TypeProperties.td3
-rw-r--r--contrib/llvm-project/clang/include/clang/Basic/TypeNodes.td2
-rw-r--r--contrib/llvm-project/clang/include/clang/Sema/DeclSpec.h9
-rw-r--r--contrib/llvm-project/clang/include/clang/Sema/Sema.h2
-rw-r--r--contrib/llvm-project/clang/lib/AST/ASTContext.cpp34
-rw-r--r--contrib/llvm-project/clang/lib/AST/ASTImporter.cpp3
-rw-r--r--contrib/llvm-project/clang/lib/AST/Type.cpp9
-rw-r--r--contrib/llvm-project/clang/lib/CodeGen/CGDebugInfo.cpp1
-rw-r--r--contrib/llvm-project/clang/lib/CodeGen/CodeGenFunction.cpp1
-rw-r--r--contrib/llvm-project/clang/lib/Sema/SemaExpr.cpp1
-rw-r--r--contrib/llvm-project/clang/lib/Sema/SemaLambda.cpp3
-rw-r--r--contrib/llvm-project/clang/lib/Sema/SemaTemplateDeduction.cpp7
-rw-r--r--contrib/llvm-project/clang/lib/Sema/SemaTemplateVariadic.cpp3
-rw-r--r--contrib/llvm-project/clang/lib/Sema/SemaType.cpp119
16 files changed, 121 insertions, 99 deletions
diff --git a/contrib/llvm-project/clang/include/clang/AST/ASTContext.h b/contrib/llvm-project/clang/include/clang/AST/ASTContext.h
index 9020e6629d08..3700d0101daf 100644
--- a/contrib/llvm-project/clang/include/clang/AST/ASTContext.h
+++ b/contrib/llvm-project/clang/include/clang/AST/ASTContext.h
@@ -1475,8 +1475,16 @@ public:
void getInjectedTemplateArgs(const TemplateParameterList *Params,
SmallVectorImpl<TemplateArgument> &Args);
+ /// Form a pack expansion type with the given pattern.
+ /// \param NumExpansions The number of expansions for the pack, if known.
+ /// \param ExpectPackInType If \c false, we should not expect \p Pattern to
+ /// contain an unexpanded pack. This only makes sense if the pack
+ /// expansion is used in a context where the arity is inferred from
+ /// elsewhere, such as if the pattern contains a placeholder type or
+ /// if this is the canonical type of another pack expansion type.
QualType getPackExpansionType(QualType Pattern,
- Optional<unsigned> NumExpansions);
+ Optional<unsigned> NumExpansions,
+ bool ExpectPackInType = true);
QualType getObjCInterfaceType(const ObjCInterfaceDecl *Decl,
ObjCInterfaceDecl *PrevDecl = nullptr) const;
diff --git a/contrib/llvm-project/clang/include/clang/AST/Type.h b/contrib/llvm-project/clang/include/clang/AST/Type.h
index 736f08651c84..74e4a578cb55 100644
--- a/contrib/llvm-project/clang/include/clang/AST/Type.h
+++ b/contrib/llvm-project/clang/include/clang/AST/Type.h
@@ -4375,11 +4375,7 @@ class TypedefType : public Type {
protected:
friend class ASTContext; // ASTContext creates these.
- TypedefType(TypeClass tc, const TypedefNameDecl *D, QualType can)
- : Type(tc, can, can->getDependence() & ~TypeDependence::UnexpandedPack),
- Decl(const_cast<TypedefNameDecl *>(D)) {
- assert(!isa<TypedefType>(can) && "Invalid canonical type");
- }
+ TypedefType(TypeClass tc, const TypedefNameDecl *D, QualType can);
public:
TypedefNameDecl *getDecl() const { return Decl; }
@@ -5616,7 +5612,8 @@ class PackExpansionType : public Type, public llvm::FoldingSetNode {
PackExpansionType(QualType Pattern, QualType Canon,
Optional<unsigned> NumExpansions)
: Type(PackExpansion, Canon,
- (Pattern->getDependence() | TypeDependence::Instantiation) &
+ (Pattern->getDependence() | TypeDependence::Dependent |
+ TypeDependence::Instantiation) &
~TypeDependence::UnexpandedPack),
Pattern(Pattern) {
PackExpansionTypeBits.NumExpansions =
@@ -5637,8 +5634,8 @@ public:
return None;
}
- bool isSugared() const { return !Pattern->isDependentType(); }
- QualType desugar() const { return isSugared() ? Pattern : QualType(this, 0); }
+ bool isSugared() const { return false; }
+ QualType desugar() const { return QualType(this, 0); }
void Profile(llvm::FoldingSetNodeID &ID) {
Profile(ID, getPattern(), getNumExpansions());
diff --git a/contrib/llvm-project/clang/include/clang/AST/TypeProperties.td b/contrib/llvm-project/clang/include/clang/AST/TypeProperties.td
index 4540ea0e1952..ed91670829b8 100644
--- a/contrib/llvm-project/clang/include/clang/AST/TypeProperties.td
+++ b/contrib/llvm-project/clang/include/clang/AST/TypeProperties.td
@@ -722,7 +722,8 @@ let Class = PackExpansionType in {
}
def : Creator<[{
- return ctx.getPackExpansionType(pattern, numExpansions);
+ return ctx.getPackExpansionType(pattern, numExpansions,
+ /*ExpectPackInType*/false);
}]>;
}
diff --git a/contrib/llvm-project/clang/include/clang/Basic/TypeNodes.td b/contrib/llvm-project/clang/include/clang/Basic/TypeNodes.td
index a4e3002b9075..011394c3ef45 100644
--- a/contrib/llvm-project/clang/include/clang/Basic/TypeNodes.td
+++ b/contrib/llvm-project/clang/include/clang/Basic/TypeNodes.td
@@ -100,7 +100,7 @@ def DeducedTemplateSpecializationType : TypeNode<DeducedType>;
def InjectedClassNameType : TypeNode<Type>, AlwaysDependent, LeafType;
def DependentNameType : TypeNode<Type>, AlwaysDependent;
def DependentTemplateSpecializationType : TypeNode<Type>, AlwaysDependent;
-def PackExpansionType : TypeNode<Type>, NeverCanonicalUnlessDependent;
+def PackExpansionType : TypeNode<Type>, AlwaysDependent;
def ObjCTypeParamType : TypeNode<Type>, NeverCanonical;
def ObjCObjectType : TypeNode<Type>;
def ObjCInterfaceType : TypeNode<ObjCObjectType>, LeafType;
diff --git a/contrib/llvm-project/clang/include/clang/Sema/DeclSpec.h b/contrib/llvm-project/clang/include/clang/Sema/DeclSpec.h
index 8db03babfb1e..0a22b5af7c64 100644
--- a/contrib/llvm-project/clang/include/clang/Sema/DeclSpec.h
+++ b/contrib/llvm-project/clang/include/clang/Sema/DeclSpec.h
@@ -2435,6 +2435,15 @@ public:
return true;
return false;
}
+ /// Get the trailing return type appearing (at any level) within this
+ /// declarator.
+ ParsedType getTrailingReturnType() const {
+ for (const auto &Chunk : type_objects())
+ if (Chunk.Kind == DeclaratorChunk::Function &&
+ Chunk.Fun.hasTrailingReturnType())
+ return Chunk.Fun.getTrailingReturnType();
+ return ParsedType();
+ }
/// \brief Sets a trailing requires clause for this declarator.
void setTrailingRequiresClause(Expr *TRC) {
diff --git a/contrib/llvm-project/clang/include/clang/Sema/Sema.h b/contrib/llvm-project/clang/include/clang/Sema/Sema.h
index 16a7084f6b08..1b5e389501c3 100644
--- a/contrib/llvm-project/clang/include/clang/Sema/Sema.h
+++ b/contrib/llvm-project/clang/include/clang/Sema/Sema.h
@@ -8172,6 +8172,8 @@ public:
/// Completely replace the \c auto in \p TypeWithAuto by
/// \p Replacement. This does not retain any \c auto type sugar.
QualType ReplaceAutoType(QualType TypeWithAuto, QualType Replacement);
+ TypeSourceInfo *ReplaceAutoTypeSourceInfo(TypeSourceInfo *TypeWithAuto,
+ QualType Replacement);
/// Result type of DeduceAutoType.
enum DeduceAutoResult {
diff --git a/contrib/llvm-project/clang/lib/AST/ASTContext.cpp b/contrib/llvm-project/clang/lib/AST/ASTContext.cpp
index bf51d35d9693..1497cccff175 100644
--- a/contrib/llvm-project/clang/lib/AST/ASTContext.cpp
+++ b/contrib/llvm-project/clang/lib/AST/ASTContext.cpp
@@ -4868,37 +4868,27 @@ ASTContext::getInjectedTemplateArgs(const TemplateParameterList *Params,
}
QualType ASTContext::getPackExpansionType(QualType Pattern,
- Optional<unsigned> NumExpansions) {
+ Optional<unsigned> NumExpansions,
+ bool ExpectPackInType) {
+ assert((!ExpectPackInType || Pattern->containsUnexpandedParameterPack()) &&
+ "Pack expansions must expand one or more parameter packs");
+
llvm::FoldingSetNodeID ID;
PackExpansionType::Profile(ID, Pattern, NumExpansions);
- // A deduced type can deduce to a pack, eg
- // auto ...x = some_pack;
- // That declaration isn't (yet) valid, but is created as part of building an
- // init-capture pack:
- // [...x = some_pack] {}
- assert((Pattern->containsUnexpandedParameterPack() ||
- Pattern->getContainedDeducedType()) &&
- "Pack expansions must expand one or more parameter packs");
void *InsertPos = nullptr;
- PackExpansionType *T
- = PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos);
+ PackExpansionType *T = PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos);
if (T)
return QualType(T, 0);
QualType Canon;
if (!Pattern.isCanonical()) {
- Canon = getCanonicalType(Pattern);
- // The canonical type might not contain an unexpanded parameter pack, if it
- // contains an alias template specialization which ignores one of its
- // parameters.
- if (Canon->containsUnexpandedParameterPack()) {
- Canon = getPackExpansionType(Canon, NumExpansions);
-
- // Find the insert position again, in case we inserted an element into
- // PackExpansionTypes and invalidated our insert position.
- PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos);
- }
+ Canon = getPackExpansionType(getCanonicalType(Pattern), NumExpansions,
+ /*ExpectPackInType=*/false);
+
+ // Find the insert position again, in case we inserted an element into
+ // PackExpansionTypes and invalidated our insert position.
+ PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos);
}
T = new (*this, TypeAlignment)
diff --git a/contrib/llvm-project/clang/lib/AST/ASTImporter.cpp b/contrib/llvm-project/clang/lib/AST/ASTImporter.cpp
index 3779e0cb872b..e0a186307e93 100644
--- a/contrib/llvm-project/clang/lib/AST/ASTImporter.cpp
+++ b/contrib/llvm-project/clang/lib/AST/ASTImporter.cpp
@@ -1498,7 +1498,8 @@ ASTNodeImporter::VisitPackExpansionType(const PackExpansionType *T) {
return ToPatternOrErr.takeError();
return Importer.getToContext().getPackExpansionType(*ToPatternOrErr,
- T->getNumExpansions());
+ T->getNumExpansions(),
+ /*ExpactPack=*/false);
}
ExpectedType ASTNodeImporter::VisitDependentTemplateSpecializationType(
diff --git a/contrib/llvm-project/clang/lib/AST/Type.cpp b/contrib/llvm-project/clang/lib/AST/Type.cpp
index 10a6a2610130..ce011eddbd2e 100644
--- a/contrib/llvm-project/clang/lib/AST/Type.cpp
+++ b/contrib/llvm-project/clang/lib/AST/Type.cpp
@@ -1187,9 +1187,6 @@ public:
T->getTypeConstraintArguments());
}
- // FIXME: Non-trivial to implement, but important for C++
- SUGARED_TYPE_CLASS(PackExpansion)
-
QualType VisitObjCObjectType(const ObjCObjectType *T) {
QualType baseType = recurse(T->getBaseType());
if (baseType.isNull())
@@ -3317,6 +3314,12 @@ void FunctionProtoType::Profile(llvm::FoldingSetNodeID &ID,
getExtProtoInfo(), Ctx, isCanonicalUnqualified());
}
+TypedefType::TypedefType(TypeClass tc, const TypedefNameDecl *D, QualType can)
+ : Type(tc, can, D->getUnderlyingType()->getDependence()),
+ Decl(const_cast<TypedefNameDecl *>(D)) {
+ assert(!isa<TypedefType>(can) && "Invalid canonical type");
+}
+
QualType TypedefType::desugar() const {
return getDecl()->getUnderlyingType();
}
diff --git a/contrib/llvm-project/clang/lib/CodeGen/CGDebugInfo.cpp b/contrib/llvm-project/clang/lib/CodeGen/CGDebugInfo.cpp
index 703f5087370a..143408401245 100644
--- a/contrib/llvm-project/clang/lib/CodeGen/CGDebugInfo.cpp
+++ b/contrib/llvm-project/clang/lib/CodeGen/CGDebugInfo.cpp
@@ -3268,7 +3268,6 @@ llvm::DIType *CGDebugInfo::CreateTypeNode(QualType Ty, llvm::DIFile *Unit) {
case Type::TypeOf:
case Type::Decltype:
case Type::UnaryTransform:
- case Type::PackExpansion:
break;
}
diff --git a/contrib/llvm-project/clang/lib/CodeGen/CodeGenFunction.cpp b/contrib/llvm-project/clang/lib/CodeGen/CodeGenFunction.cpp
index 8ce488f35dd3..8f79cc77f0e6 100644
--- a/contrib/llvm-project/clang/lib/CodeGen/CodeGenFunction.cpp
+++ b/contrib/llvm-project/clang/lib/CodeGen/CodeGenFunction.cpp
@@ -2075,7 +2075,6 @@ void CodeGenFunction::EmitVariablyModifiedType(QualType type) {
case Type::UnaryTransform:
case Type::Attributed:
case Type::SubstTemplateTypeParm:
- case Type::PackExpansion:
case Type::MacroQualified:
// Keep walking after single level desugaring.
type = type.getSingleStepDesugaredType(getContext());
diff --git a/contrib/llvm-project/clang/lib/Sema/SemaExpr.cpp b/contrib/llvm-project/clang/lib/Sema/SemaExpr.cpp
index d301e6c732ab..610a77c0e6f2 100644
--- a/contrib/llvm-project/clang/lib/Sema/SemaExpr.cpp
+++ b/contrib/llvm-project/clang/lib/Sema/SemaExpr.cpp
@@ -4345,7 +4345,6 @@ static void captureVariablyModifiedType(ASTContext &Context, QualType T,
case Type::UnaryTransform:
case Type::Attributed:
case Type::SubstTemplateTypeParm:
- case Type::PackExpansion:
case Type::MacroQualified:
// Keep walking after single level desugaring.
T = T.getSingleStepDesugaredType(Context);
diff --git a/contrib/llvm-project/clang/lib/Sema/SemaLambda.cpp b/contrib/llvm-project/clang/lib/Sema/SemaLambda.cpp
index 657ed13f207a..dc74f6e2f7dc 100644
--- a/contrib/llvm-project/clang/lib/Sema/SemaLambda.cpp
+++ b/contrib/llvm-project/clang/lib/Sema/SemaLambda.cpp
@@ -803,7 +803,8 @@ QualType Sema::buildLambdaInitCaptureInitialization(
Diag(EllipsisLoc, getLangOpts().CPlusPlus20
? diag::warn_cxx17_compat_init_capture_pack
: diag::ext_init_capture_pack);
- DeductType = Context.getPackExpansionType(DeductType, NumExpansions);
+ DeductType = Context.getPackExpansionType(DeductType, NumExpansions,
+ /*ExpectPackInType=*/false);
TLB.push<PackExpansionTypeLoc>(DeductType).setEllipsisLoc(EllipsisLoc);
} else {
// Just ignore the ellipsis for now and form a non-pack variable. We'll
diff --git a/contrib/llvm-project/clang/lib/Sema/SemaTemplateDeduction.cpp b/contrib/llvm-project/clang/lib/Sema/SemaTemplateDeduction.cpp
index 5392be57a3aa..eb8677d0e481 100644
--- a/contrib/llvm-project/clang/lib/Sema/SemaTemplateDeduction.cpp
+++ b/contrib/llvm-project/clang/lib/Sema/SemaTemplateDeduction.cpp
@@ -4894,6 +4894,13 @@ QualType Sema::ReplaceAutoType(QualType TypeWithAuto,
.TransformType(TypeWithAuto);
}
+TypeSourceInfo *Sema::ReplaceAutoTypeSourceInfo(TypeSourceInfo *TypeWithAuto,
+ QualType TypeToReplaceAuto) {
+ return SubstituteDeducedTypeTransform(*this, TypeToReplaceAuto,
+ /*UseTypeSugar*/ false)
+ .TransformType(TypeWithAuto);
+}
+
void Sema::DiagnoseAutoDeductionFailure(VarDecl *VDecl, Expr *Init) {
if (isa<InitListExpr>(Init))
Diag(VDecl->getLocation(),
diff --git a/contrib/llvm-project/clang/lib/Sema/SemaTemplateVariadic.cpp b/contrib/llvm-project/clang/lib/Sema/SemaTemplateVariadic.cpp
index 7b77d1cb482a..259cc5165776 100644
--- a/contrib/llvm-project/clang/lib/Sema/SemaTemplateVariadic.cpp
+++ b/contrib/llvm-project/clang/lib/Sema/SemaTemplateVariadic.cpp
@@ -614,7 +614,8 @@ QualType Sema::CheckPackExpansion(QualType Pattern, SourceRange PatternRange,
return QualType();
}
- return Context.getPackExpansionType(Pattern, NumExpansions);
+ return Context.getPackExpansionType(Pattern, NumExpansions,
+ /*ExpectPackInType=*/false);
}
ExprResult Sema::ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc) {
diff --git a/contrib/llvm-project/clang/lib/Sema/SemaType.cpp b/contrib/llvm-project/clang/lib/Sema/SemaType.cpp
index cc151a048b98..f2c3c6373948 100644
--- a/contrib/llvm-project/clang/lib/Sema/SemaType.cpp
+++ b/contrib/llvm-project/clang/lib/Sema/SemaType.cpp
@@ -3101,24 +3101,10 @@ static void diagnoseRedundantReturnTypeQualifiers(Sema &S, QualType RetTy,
D.getDeclSpec().getUnalignedSpecLoc());
}
-static void CopyTypeConstraintFromAutoType(Sema &SemaRef, const AutoType *Auto,
- AutoTypeLoc AutoLoc,
- TemplateTypeParmDecl *TP,
- SourceLocation EllipsisLoc) {
-
- TemplateArgumentListInfo TAL(AutoLoc.getLAngleLoc(), AutoLoc.getRAngleLoc());
- for (unsigned Idx = 0; Idx < AutoLoc.getNumArgs(); ++Idx)
- TAL.addArgument(AutoLoc.getArgLoc(Idx));
-
- SemaRef.AttachTypeConstraint(
- AutoLoc.getNestedNameSpecifierLoc(), AutoLoc.getConceptNameInfo(),
- AutoLoc.getNamedConcept(),
- AutoLoc.hasExplicitTemplateArgs() ? &TAL : nullptr, TP, EllipsisLoc);
-}
-
-static QualType InventTemplateParameter(
- TypeProcessingState &state, QualType T, TypeSourceInfo *TSI, AutoType *Auto,
- InventedTemplateParameterInfo &Info) {
+static std::pair<QualType, TypeSourceInfo *>
+InventTemplateParameter(TypeProcessingState &state, QualType T,
+ TypeSourceInfo *TrailingTSI, AutoType *Auto,
+ InventedTemplateParameterInfo &Info) {
Sema &S = state.getSema();
Declarator &D = state.getDeclarator();
@@ -3143,13 +3129,25 @@ static QualType InventTemplateParameter(
IsParameterPack, /*HasTypeConstraint=*/Auto->isConstrained());
InventedTemplateParam->setImplicit();
Info.TemplateParams.push_back(InventedTemplateParam);
- // Attach type constraints
+
+ // Attach type constraints to the new parameter.
if (Auto->isConstrained()) {
- if (TSI) {
- CopyTypeConstraintFromAutoType(
- S, Auto, TSI->getTypeLoc().getContainedAutoTypeLoc(),
- InventedTemplateParam, D.getEllipsisLoc());
+ if (TrailingTSI) {
+ // The 'auto' appears in a trailing return type we've already built;
+ // extract its type constraints to attach to the template parameter.
+ AutoTypeLoc AutoLoc = TrailingTSI->getTypeLoc().getContainedAutoTypeLoc();
+ TemplateArgumentListInfo TAL(AutoLoc.getLAngleLoc(), AutoLoc.getRAngleLoc());
+ for (unsigned Idx = 0; Idx < AutoLoc.getNumArgs(); ++Idx)
+ TAL.addArgument(AutoLoc.getArgLoc(Idx));
+
+ S.AttachTypeConstraint(AutoLoc.getNestedNameSpecifierLoc(),
+ AutoLoc.getConceptNameInfo(),
+ AutoLoc.getNamedConcept(),
+ AutoLoc.hasExplicitTemplateArgs() ? &TAL : nullptr,
+ InventedTemplateParam, D.getEllipsisLoc());
} else {
+ // The 'auto' appears in the decl-specifiers; we've not finished forming
+ // TypeSourceInfo for it yet.
TemplateIdAnnotation *TemplateId = D.getDeclSpec().getRepAsTemplateId();
TemplateArgumentListInfo TemplateArgsInfo;
if (TemplateId->LAngleLoc.isValid()) {
@@ -3167,15 +3165,16 @@ static QualType InventTemplateParameter(
}
}
- // If TSI is nullptr, this is a constrained declspec auto and the type
- // constraint will be attached later in TypeSpecLocFiller
-
// Replace the 'auto' in the function parameter with this invented
// template type parameter.
// FIXME: Retain some type sugar to indicate that this was written
// as 'auto'?
- return state.ReplaceAutoType(
- T, QualType(InventedTemplateParam->getTypeForDecl(), 0));
+ QualType Replacement(InventedTemplateParam->getTypeForDecl(), 0);
+ QualType NewT = state.ReplaceAutoType(T, Replacement);
+ TypeSourceInfo *NewTSI =
+ TrailingTSI ? S.ReplaceAutoTypeSourceInfo(TrailingTSI, Replacement)
+ : nullptr;
+ return {NewT, NewTSI};
}
static TypeSourceInfo *
@@ -3234,8 +3233,19 @@ static QualType GetDeclSpecTypeForDeclarator(TypeProcessingState &state,
if (!D.getAttributes().empty())
distributeTypeAttrsFromDeclarator(state, T);
+ // Find the deduced type in this type. Look in the trailing return type if we
+ // have one, otherwise in the DeclSpec type.
+ // FIXME: The standard wording doesn't currently describe this.
+ DeducedType *Deduced = T->getContainedDeducedType();
+ bool DeducedIsTrailingReturnType = false;
+ if (Deduced && isa<AutoType>(Deduced) && D.hasTrailingReturnType()) {
+ QualType T = SemaRef.GetTypeFromParser(D.getTrailingReturnType());
+ Deduced = T.isNull() ? nullptr : T->getContainedDeducedType();
+ DeducedIsTrailingReturnType = true;
+ }
+
// C++11 [dcl.spec.auto]p5: reject 'auto' if it is not in an allowed context.
- if (DeducedType *Deduced = T->getContainedDeducedType()) {
+ if (Deduced) {
AutoType *Auto = dyn_cast<AutoType>(Deduced);
int Error = -1;
@@ -3269,10 +3279,6 @@ static QualType GetDeclSpecTypeForDeclarator(TypeProcessingState &state,
} else if (!SemaRef.getCurScope()->isFunctionDeclarationScope()) {
Error = 21;
break;
- } else if (D.hasTrailingReturnType()) {
- // This might be OK, but we'll need to convert the trailing return
- // type later.
- break;
}
Info = &SemaRef.InventedParameterInfos.back();
@@ -3286,7 +3292,12 @@ static QualType GetDeclSpecTypeForDeclarator(TypeProcessingState &state,
Info = SemaRef.getCurLambda();
assert(Info && "No LambdaScopeInfo on the stack!");
}
- T = InventTemplateParameter(state, T, nullptr, Auto, *Info);
+
+ // We'll deal with inventing template parameters for 'auto' in trailing
+ // return types when we pick up the trailing return type when processing
+ // the function chunk.
+ if (!DeducedIsTrailingReturnType)
+ T = InventTemplateParameter(state, T, nullptr, Auto, *Info).first;
break;
}
case DeclaratorContext::MemberContext: {
@@ -3384,20 +3395,6 @@ static QualType GetDeclSpecTypeForDeclarator(TypeProcessingState &state,
(!SemaRef.getLangOpts().CPlusPlus11 || !IsCXXAutoType))
Error = 13;
- bool HaveTrailing = false;
-
- // C++11 [dcl.spec.auto]p2: 'auto' is always fine if the declarator
- // contains a trailing return type. That is only legal at the outermost
- // level. Check all declarator chunks (outermost first) anyway, to give
- // better diagnostics.
- // We don't support '__auto_type' with trailing return types.
- // FIXME: Should we only do this for 'auto' and not 'decltype(auto)'?
- if (SemaRef.getLangOpts().CPlusPlus11 && IsCXXAutoType &&
- D.hasTrailingReturnType()) {
- HaveTrailing = true;
- Error = -1;
- }
-
SourceRange AutoRange = D.getDeclSpec().getTypeSpecTypeLoc();
if (D.getName().getKind() == UnqualifiedIdKind::IK_ConversionFunctionId)
AutoRange = D.getName().getSourceRange();
@@ -3427,8 +3424,7 @@ static QualType GetDeclSpecTypeForDeclarator(TypeProcessingState &state,
T = SemaRef.Context.IntTy;
D.setInvalidType(true);
- } else if (Auto && !HaveTrailing &&
- D.getContext() != DeclaratorContext::LambdaExprContext) {
+ } else if (Auto && D.getContext() != DeclaratorContext::LambdaExprContext) {
// If there was a trailing return type, we already got
// warn_cxx98_compat_trailing_return_type in the parser.
SemaRef.Diag(AutoRange.getBegin(),
@@ -4881,12 +4877,21 @@ static TypeSourceInfo *GetFullTypeForDeclarator(TypeProcessingState &state,
// An error occurred parsing the trailing return type.
T = Context.IntTy;
D.setInvalidType(true);
- } else if (S.getLangOpts().CPlusPlus20)
- // Handle cases like: `auto f() -> auto` or `auto f() -> C auto`.
- if (AutoType *Auto = T->getContainedAutoType())
- if (S.getCurScope()->isFunctionDeclarationScope())
- T = InventTemplateParameter(state, T, TInfo, Auto,
- S.InventedParameterInfos.back());
+ } else if (AutoType *Auto = T->getContainedAutoType()) {
+ // If the trailing return type contains an `auto`, we may need to
+ // invent a template parameter for it, for cases like
+ // `auto f() -> C auto` or `[](auto (*p) -> auto) {}`.
+ InventedTemplateParameterInfo *InventedParamInfo = nullptr;
+ if (D.getContext() == DeclaratorContext::PrototypeContext)
+ InventedParamInfo = &S.InventedParameterInfos.back();
+ else if (D.getContext() ==
+ DeclaratorContext::LambdaExprParameterContext)
+ InventedParamInfo = S.getCurLambda();
+ if (InventedParamInfo) {
+ std::tie(T, TInfo) = InventTemplateParameter(
+ state, T, TInfo, Auto, *InventedParamInfo);
+ }
+ }
} else {
// This function type is not the type of the entity being declared,
// so checking the 'auto' is not the responsibility of this chunk.
@@ -5518,7 +5523,7 @@ static TypeSourceInfo *GetFullTypeForDeclarator(TypeProcessingState &state,
<< T << D.getSourceRange();
D.setEllipsisLoc(SourceLocation());
} else {
- T = Context.getPackExpansionType(T, None);
+ T = Context.getPackExpansionType(T, None, /*ExpectPackInType=*/false);
}
break;
case DeclaratorContext::TemplateParamContext: