module Rack::Utils

def status_code(status)
  if status.is_a?(Symbol)
    SYMBOL_TO_STATUS_CODE.fetch(status) do
      fallback_code = OBSOLETE_SYMBOLS_TO_STATUS_CODES.fetch(status) { raise ArgumentError, "Unrecognized status code #{status.inspect}" }
      message = "Status code #{status.inspect} is deprecated and will be removed in a future version of Rack."
      if canonical_symbol = OBSOLETE_SYMBOL_MAPPINGS[status]
        # message = "#{message} Please use #{canonical_symbol.inspect} instead."
        # For now, let's not emit any warning when there is a mapping.
      else
        warn message, uplevel: 3
      end
      fallback_code
    end
  else
    status.to_i
  end
end