--- reason ruby 1.8 feature

    㳰ȯ򥷥ܥ֤ޤ֤ͤϡ

        * :break
        * :redo
        * :retry
        * :next
        * :return
#       * :noreason

    Τ줫Ǥexit_value 򻲾ȤƤ

