From: Sylvain Joyeux <sylvain.joyeux@...>
Date: 2008-06-14T23:17:37+09:00
Subject: Re: raise and rescue

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There is no direct way, but you can implement it using continuations
(would not be supported in 1.9 though ...)

See attached file

Sylvain

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module RestartableException=0A    attr_accessor :raising_context=0A    def =
restart=0A        raising_context.call=0A    end=0Aend=0A=0Amodule Kernel=
=0A    def restartable=0A        yield=0A    rescue Exception =3D> e=0A    =
    e.extend RestartableException=0A        Kernel.callcc do |cc|=0A       =
     e.raising_context =3D cc=0A            raise e=0A        end=0A       =
 retry=0A    end=0Aend=0A=0Adef raise_deep_down(lvl)=0A    if lvl =3D=3D 0=
=0A        puts "line #{lvl}:1"=0A        puts "line #{lvl}:2"=0A        pu=
ts "line #{lvl}:3"=0A        restartable do=0A            if @do_pass=0A   =
             puts "retrying ..."=0A            else=0A                @do_p=
ass =3D true=0A                raise=0A            end=0A        end=0A    =
    puts "line #{lvl}:4"=0A        puts "line #{lvl}:5"=0A    else=0A      =
  raise_deep_down(lvl - 1)=0A    end=0Aend=0A=0Abegin=0A    raise_deep_down=
(10)=0Arescue RestartableException =3D> e=0A    e.restart=0Aend=0A=0A
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