Method equivalent

include/libremidi/system_error2.hpp:3146–3155

---------- GenericErrorDomain

// ---------- GenericErrorDomain
//
inline bool generic_error_domain::equivalent(const error& lhs, const error& rhs) const noexcept
{
  assert(lhs.domain() == *this);
  if (lhs.domain() == rhs.domain())
  {
    return error_cast<std::errc>(lhs) == error_cast<std::errc>(rhs);
  }

  return false;
}

// namespace {