[Bug c++/88631] CTAD cannot deduce from () value initialization

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88631

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I think this is a dup of PR 81486, please check if your patch fixes the
examples there too.