https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88128
--- Comment #3 from Viktor Ostashevskyi <ostash at ostash dot kiev.ua> --- I see that std::span implementation was proposed in https://gcc.gnu.org/ml/libstdc++/2019-08/msg00068.html. Was this bug fixed for implenting it? Is it possible to make std::span<const T> from std::vector<T>?
