================
@@ -944,12 +950,72 @@ getRHSTemplateDeclAndArgs(Sema &SemaRef,
TypeAliasTemplateDecl *AliasTemplate) {
return {Template, AliasRhsTemplateArgs};
}
+struct InheritedConstructorDeductionInfo {
+ // Class template for which we are declaring deduction guides
+ // This is `C` in the standard wording
+ TemplateDecl *DerivedClassTemplate;
+
+ // `template<typename> CC` in the standard wording
+ // This is the type of template that is substituted in the deduction guide
+ // return type `CC<R>`
+ TypeSourceInfo *CCType;
+};
+
+// Build the type for a deduction guide generated from an inherited constructor
+// [over.match.class.deduct]p1.10:
+// ... the set contains the guides of A with the return type R
+// of each guide replaced with `typename CC<R>::type` ...
+TypeSourceInfo *buildInheritedConstructorDeductionGuideType(
+ Sema &SemaRef, const InheritedConstructorDeductionInfo &Info,
+ TypeSourceInfo *SourceGuideTSI) {
+ auto &Context = SemaRef.Context;
+ const auto *FPT = SourceGuideTSI->getType()->getAs<FunctionProtoType>();
+ assert(FPT && "Source Guide type should be a FunctionProtoType");
+
+ // This substitution can fail in cases where the source return type
+ // is not dependent and the derived class is not deducible
+ Sema::SFINAETrap Trap(SemaRef);
+
+ MultiLevelTemplateArgumentList Args;
+ Args.addOuterTemplateArguments(Info.DerivedClassTemplate,
+ TemplateArgument(FPT->getReturnType()),
false);
----------------
antangelo wrote:
Done
https://github.com/llvm/llvm-project/pull/98788
_______________________________________________
cfe-commits mailing list
cfe-commits@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
