================
@@ -1216,10 +1308,225 @@ void DeclareImplicitDeductionGuidesForTypeAlias(
->getDeductionCandidateKind() == DeductionCandidate::Aggregate)
continue;
- BuildDeductionGuideForTypeAlias(SemaRef, AliasTemplate, F, Loc);
+ BuildDeductionGuideForTypeAlias(SemaRef, AliasTemplate, F, Loc,
+ DeducingTemplate, DerivedClassMapperType);
}
}
+void DeclareImplicitDeductionGuidesFromInheritedConstructors(
+ Sema &SemaRef, TemplateDecl *Template, ClassTemplateDecl *Pattern,
+ TypeSourceInfo *BaseTSI, unsigned BaseIdx) {
+ auto &Context = SemaRef.Context;
+ DeclContext *DC = Template->getDeclContext();
+ const auto *BaseTST =
BaseTSI->getType()->getAs<TemplateSpecializationType>();
+ if (!BaseTST)
+ return;
+ SourceLocation BaseLoc = BaseTSI->getTypeLoc().getBeginLoc();
+
+ TemplateDecl *BaseTD = BaseTST->getTemplateName().getAsTemplateDecl();
+ if (!BaseTD)
+ return;
+
+ // Subsitute any parameters with default arguments not present in the base,
+ // since partial specializations cannot have default parameters
----------------
hokein wrote:
Can you explain this comment? I'm afraid that I might not completely understand
it.
> since partial specializations cannot have default parameters
This is a good point. I think the `partial specialization` here means the the
partial specialization of `template <typename> class CC;` which is referred in
the standard.
And it is illegal to have default template arguments in a class template
partial specialization (in the current implementation, the partial
specialization still has the default argument in its template parameters, see
my another comment around `PartialSpecTPL`).
https://github.com/llvm/llvm-project/pull/98788
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