class Slop

def extract_long_flag(objects, config)
  flag = objects.first.to_s
  if flag =~ /\A(?:--?)?[a-zA-Z0-9][a-zA-Z0-9_.-]+\=?\??\z/
    config[:argument] ||= true if flag.end_with?('=')
    config[:optional_argument] = true if flag.end_with?('=?')
    objects.shift
    clean(flag).sub(/\=\??\z/, '')
  end
end