[Bug libstdc++/119469] iter_rvalue_reference_t is wrong for function types

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119469

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Or to put it another way:

using F = int();
static_assert( not same_as<decltype(declval<F&&>()), F&&> );
static_assert( same_as<decltype(declval<F&&>()), F&> );