In libstdc++ shipped with gcc9 std::basic_string_view::pointer is no longer constant, which is causing the compiler to complain about dropping const in reinterpret_cast. The solution is to use std::basic_string_view::const_pointer.
In libstdc++ shipped with gcc9 std::basic_string_view::pointer is no longer constant, which is causing the compiler to complain about dropping const in reinterpret_cast. The solution is to use std::basic_string_view::const_pointer.