https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121053
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |jason at gcc dot gnu.org
--- Comment #1 from Jason Merrill <jason at gcc dot gnu.org> ---
Ah, because there's no constraint on
template<typename _Res, typename _Visitor, typename... _Variants>
constexpr _Res
visit(_Visitor&& __visitor, _Variants&&... __variants)
...which seems to conform to https://eel.is/c++draft/variant#visit
I'd think that making it SFINAE like the other form would require a change to
the standard.
