================
@@ -12078,6 +12079,43 @@ static void DiagnoseFailedExplicitSpec(Sema &S,
OverloadCandidate *Cand) {
<< (ES.getExpr() ? ES.getExpr()->getSourceRange() : SourceRange());
}
+static void NoteImplicitDeductionGuide(Sema &S, CXXDeductionGuideDecl *DG) {
+ // We want to always print synthesized deduction guides for type aliases.
+ // They would retain the explicit bit of the corresponding constructor.
+ TemplateDecl *OriginTemplate =
+ DG->getDeclName().getCXXDeductionGuideTemplate();
+ if (!DG->isImplicit() && (!OriginTemplate || !OriginTemplate->isTypeAlias()))
----------------
hokein wrote:
nit: it's easier to read if we write it as `if (... && !(OriginTemplate &&
OriginTemplate->isTypeAlias()))`.
https://github.com/llvm/llvm-project/pull/96084
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