# File lib/arr-pm/file.rb, line 245
  def operator(flag)
    return "<=" if mask?(flag, FLAG_LESS | FLAG_EQUAL)
    return ">=" if mask?(flag, FLAG_GREATER | FLAG_EQUAL)
    return "=" if mask?(flag, FLAG_EQUAL)
    return "<" if mask?(flag, FLAG_LESS)
    return ">" if mask?(flag, FLAG_GREATER)
  end