[Bug libstdc++/120305] Cannot create a std::vector from a std::ranges::transform_view.

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120305

--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
N.B. this has nothing to do with ranges::transform_view, the problem is
entirely due to iota_view

https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2019/p1522r1.pdf has the
background on integer-like class types.