Get C++ type name

type_name.cpp

template <class T>
constexpr std::string_view type_name() {
#ifdef __clang__
    std::string_view p = __PRETTY_FUNCTION__;
    return std::string_view(p.data() + 34, p.size() - 34 - 1);
#elif defined(__GNUC__)
    std::string_view p = __PRETTY_FUNCTION__;
#  if __cplusplus < 201402
    return std::string_view(p.data() + 36, p.size() - 36 - 1);
#  else
    return std::string_view(p.data() + 49, p.find(';', 49) - 49);
#  endif
#elif defined(_MSC_VER)
    std::string_view p = __FUNCSIG__;
    return std::string_view(p.data() + 84, p.size() - 84 - 7);
#endif
}