From: Robert Klemme <bob.news@...>
Date: 2004-01-13T23:41:37+09:00
Subject: Re: [HELP] : how can I write a goto in ruby


<nobu.nokada@softhome.net> schrieb im Newsbeitrag
news:200401131327.i0DDRLnu007049@sharui.nakada.kanuma.tochigi.jp...
> Hi,
>
> At Tue, 13 Jan 2004 21:36:37 +0900,
> Robert Klemme wrote:
> > >                             if foo
> > >                                 break begin_eval //goto (1)
>
> This should exit outer loop.
>
> > You can use "next" and "break":
> >
> > def eval_lisp
> >   loop do
> >
> >     # some code come here
> >
> >     loop do
> >       case
> >       # ...
> >       else
> >         break if foo
>
> So "return" instead of "break" should be here.

Oh, yes of course.  Thanks!  Alternatively one could use throw catch if
some work has to be done after the outer loop.  That would then result in
this version:

def eval_lisp
  catch :begin_eval do
    loop do

      # some code come here

      loop do
        case
        # ...
        else
          throw :begin_eval if foo
          next
        end
      end
    end
  end

  # work after loop
end

Regards

    robert