[Bug libstdc++/109150] std::fill should use __gnu_cxx::__is_scalar overloads for all scalars

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109150

--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Arthur O'Dwyer from comment #4)
> The if-condition will have trouble *for now* with `Leopard`-like types

What trouble? I don't care if there's some confusing deleted assignment, I care
that the assignment *first = tmp is equivalent to *first = val, where tmp is a
const lvalue of the same type as val.

*first = tmp and *first = val do the same thing for your Leopard type, and that
assignment is trivial, which is all that matters.