Function bit_cast

src/include/base64.hpp:26–38

#else
template <class To, class From>
std::enable_if_t<sizeof(To) == sizeof(From) &&
                     std::is_trivially_copyable_v<From> &&
                     std::is_trivially_copyable_v<To>,
                 To>
bit_cast(const From& src) noexcept {
  static_assert(std::is_trivially_constructible_v<To>,
                "This implementation additionally requires "
                "destination type to be trivially constructible");

  To dst;
  std::memcpy(&dst, &src, sizeof(To));
  return dst;
}
#endif

inline constexpr char padding_char{'='};