https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91369

--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #3)
> (In reply to Jason Merrill from comment #2)
> > > should we mark them some way and either allow the first
> > > cxx_fold_indirect_ref or the above code to change their type the first 
> > > time
> > > they are stored?
> > 
> > This would work, but wouldn't distinguish between a new-expression and the
> > equivalent written by hand.  I suppose a flag could make that distinction.
> 
> Wouldn't user written code have REINTERPRET_CAST_P set on the cast and thus
> be rejected?
> Can user call the replaceable new operator directly in constexpr contexts in
> some valid way?

Ah, good point.  They could call it directly, but couldn't do anything with the
memory without a reinterpret_cast.

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