================
@@ -1398,5 +1807,30 @@ void Sema::DeclareImplicitDeductionGuides(TemplateDecl
*Template,
->getTemplatedDecl())
->setDeductionCandidateKind(DeductionCandidate::Copy);
+ CXXRecordDecl *TemplatedDecl = Pattern->getTemplatedDecl();
+ if (getLangOpts().CPlusPlus23 && TemplatedDecl->hasDefinition()) {
----------------
antangelo wrote:
Given the uncertainty with open CWG issues and the potential breakage of code
on earlier standards versions, I think it's less risky to keep it constrained
to C++23 for now. It's probably worth revisiting in the future, though.
https://github.com/llvm/llvm-project/pull/98788
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