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-rw-r--r--clang/lib/Sema/TreeTransform.h137
1 files changed, 97 insertions, 40 deletions
diff --git a/clang/lib/Sema/TreeTransform.h b/clang/lib/Sema/TreeTransform.h
index 1f725117383..d6105353bbd 100644
--- a/clang/lib/Sema/TreeTransform.h
+++ b/clang/lib/Sema/TreeTransform.h
@@ -951,12 +951,16 @@ public:
/// Build a new C++11 auto type.
///
/// By default, builds a new AutoType with the given deduced type.
- QualType RebuildAutoType(QualType Deduced, AutoTypeKeyword Keyword) {
+ QualType RebuildAutoType(QualType Deduced, AutoTypeKeyword Keyword,
+ ConceptDecl *TypeConstraintConcept,
+ ArrayRef<TemplateArgument> TypeConstraintArgs) {
// Note, IsDependent is always false here: we implicitly convert an 'auto'
// which has been deduced to a dependent type into an undeduced 'auto', so
// that we'll retry deduction after the transformation.
return SemaRef.Context.getAutoType(Deduced, Keyword,
- /*IsDependent*/ false);
+ /*IsDependent*/ false, /*IsPack=*/false,
+ TypeConstraintConcept,
+ TypeConstraintArgs);
}
/// By default, builds a new DeducedTemplateSpecializationType with the given
@@ -4500,7 +4504,10 @@ QualType TreeTransform<Derived>::RebuildQualifiedType(QualType T,
Deduced =
SemaRef.Context.getQualifiedType(Deduced.getUnqualifiedType(), Qs);
T = SemaRef.Context.getAutoType(Deduced, AutoTy->getKeyword(),
- AutoTy->isDependentType());
+ AutoTy->isDependentType(),
+ /*isPack=*/false,
+ AutoTy->getTypeConstraintConcept(),
+ AutoTy->getTypeConstraintArguments());
} else {
// Otherwise, complain about the addition of a qualifier to an
// already-qualified type.
@@ -5233,21 +5240,29 @@ bool TreeTransform<Derived>::TransformFunctionTypeParams(
PackExpansionTypeLoc ExpansionTL = TL.castAs<PackExpansionTypeLoc>();
TypeLoc Pattern = ExpansionTL.getPatternLoc();
SemaRef.collectUnexpandedParameterPacks(Pattern, Unexpanded);
- assert(Unexpanded.size() > 0 && "Could not find parameter packs!");
// Determine whether we should expand the parameter packs.
bool ShouldExpand = false;
bool RetainExpansion = false;
- Optional<unsigned> OrigNumExpansions =
- ExpansionTL.getTypePtr()->getNumExpansions();
- NumExpansions = OrigNumExpansions;
- if (getDerived().TryExpandParameterPacks(ExpansionTL.getEllipsisLoc(),
- Pattern.getSourceRange(),
- Unexpanded,
- ShouldExpand,
- RetainExpansion,
- NumExpansions)) {
- return true;
+ Optional<unsigned> OrigNumExpansions;
+ if (Unexpanded.size() > 0) {
+ OrigNumExpansions = ExpansionTL.getTypePtr()->getNumExpansions();
+ NumExpansions = OrigNumExpansions;
+ if (getDerived().TryExpandParameterPacks(ExpansionTL.getEllipsisLoc(),
+ Pattern.getSourceRange(),
+ Unexpanded,
+ ShouldExpand,
+ RetainExpansion,
+ NumExpansions)) {
+ return true;
+ }
+ } else {
+#ifndef NDEBUG
+ const AutoType *AT =
+ Pattern.getType().getTypePtr()->getContainedAutoType();
+ assert((AT && (!AT->isDeduced() || AT->getDeducedType().isNull())) &&
+ "Could not find parameter packs or undeduced auto type!");
+#endif
}
if (ShouldExpand) {
@@ -5307,6 +5322,9 @@ bool TreeTransform<Derived>::TransformFunctionTypeParams(
indexAdjustment,
NumExpansions,
/*ExpectParameterPack=*/true);
+ assert(NewParm->isParameterPack() &&
+ "Parameter pack no longer a parameter pack after "
+ "transformation.");
} else {
NewParm = getDerived().TransformFunctionTypeParam(
OldParm, indexAdjustment, None, /*ExpectParameterPack=*/ false);
@@ -5812,32 +5830,6 @@ QualType TreeTransform<Derived>::TransformUnaryTransformType(
}
template<typename Derived>
-QualType TreeTransform<Derived>::TransformAutoType(TypeLocBuilder &TLB,
- AutoTypeLoc TL) {
- const AutoType *T = TL.getTypePtr();
- QualType OldDeduced = T->getDeducedType();
- QualType NewDeduced;
- if (!OldDeduced.isNull()) {
- NewDeduced = getDerived().TransformType(OldDeduced);
- if (NewDeduced.isNull())
- return QualType();
- }
-
- QualType Result = TL.getType();
- if (getDerived().AlwaysRebuild() || NewDeduced != OldDeduced ||
- T->isDependentType()) {
- Result = getDerived().RebuildAutoType(NewDeduced, T->getKeyword());
- if (Result.isNull())
- return QualType();
- }
-
- AutoTypeLoc NewTL = TLB.push<AutoTypeLoc>(Result);
- NewTL.setNameLoc(TL.getNameLoc());
-
- return Result;
-}
-
-template<typename Derived>
QualType TreeTransform<Derived>::TransformDeducedTemplateSpecializationType(
TypeLocBuilder &TLB, DeducedTemplateSpecializationTypeLoc TL) {
const DeducedTemplateSpecializationType *T = TL.getTypePtr();
@@ -6098,6 +6090,71 @@ QualType TreeTransform<Derived>::TransformPipeType(TypeLocBuilder &TLB,
}
};
+template<typename Derived>
+QualType TreeTransform<Derived>::TransformAutoType(TypeLocBuilder &TLB,
+ AutoTypeLoc TL) {
+ const AutoType *T = TL.getTypePtr();
+ QualType OldDeduced = T->getDeducedType();
+ QualType NewDeduced;
+ if (!OldDeduced.isNull()) {
+ NewDeduced = getDerived().TransformType(OldDeduced);
+ if (NewDeduced.isNull())
+ return QualType();
+ }
+
+ ConceptDecl *NewCD = nullptr;
+ TemplateArgumentListInfo NewTemplateArgs;
+ NestedNameSpecifierLoc NewNestedNameSpec;
+ if (TL.getTypePtr()->isConstrained()) {
+ NewCD = cast_or_null<ConceptDecl>(
+ getDerived().TransformDecl(
+ TL.getConceptNameLoc(),
+ TL.getTypePtr()->getTypeConstraintConcept()));
+
+ NewTemplateArgs.setLAngleLoc(TL.getLAngleLoc());
+ NewTemplateArgs.setRAngleLoc(TL.getRAngleLoc());
+ typedef TemplateArgumentLocContainerIterator<AutoTypeLoc> ArgIterator;
+ if (getDerived().TransformTemplateArguments(ArgIterator(TL, 0),
+ ArgIterator(TL,
+ TL.getNumArgs()),
+ NewTemplateArgs))
+ return QualType();
+
+ if (TL.getNestedNameSpecifierLoc()) {
+ NewNestedNameSpec
+ = getDerived().TransformNestedNameSpecifierLoc(
+ TL.getNestedNameSpecifierLoc());
+ if (!NewNestedNameSpec)
+ return QualType();
+ }
+ }
+
+ QualType Result = TL.getType();
+ if (getDerived().AlwaysRebuild() || NewDeduced != OldDeduced ||
+ T->isDependentType()) {
+ llvm::SmallVector<TemplateArgument, 4> NewArgList;
+ NewArgList.reserve(NewArgList.size());
+ for (const auto &ArgLoc : NewTemplateArgs.arguments())
+ NewArgList.push_back(ArgLoc.getArgument());
+ Result = getDerived().RebuildAutoType(NewDeduced, T->getKeyword(), NewCD,
+ NewArgList);
+ if (Result.isNull())
+ return QualType();
+ }
+
+ AutoTypeLoc NewTL = TLB.push<AutoTypeLoc>(Result);
+ NewTL.setNameLoc(TL.getNameLoc());
+ NewTL.setNestedNameSpecifierLoc(NewNestedNameSpec);
+ NewTL.setTemplateKWLoc(TL.getTemplateKWLoc());
+ NewTL.setConceptNameLoc(TL.getConceptNameLoc());
+ NewTL.setFoundDecl(TL.getFoundDecl());
+ NewTL.setLAngleLoc(TL.getLAngleLoc());
+ NewTL.setRAngleLoc(TL.getRAngleLoc());
+ for (unsigned I = 0; I < TL.getNumArgs(); ++I)
+ NewTL.setArgLocInfo(I, NewTemplateArgs.arguments()[I].getLocInfo());
+
+ return Result;
+}
template <typename Derived>
QualType TreeTransform<Derived>::TransformTemplateSpecializationType(
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