From: Morton Goldberg <m_goldberg@...>
Date: 2006-07-22T09:55:33+09:00
Subject: Re: contine after exception

I think I understand most of what you are doing here, and I think  
it's very nice. The one point that eludes me is purpose of the line:

       exp.instance_variable_set :@binding, bl

Could you explain that. The code seems to work just fine even when  
that line is commented out.

Regards, Morton

On Jul 21, 2006, at 7:20 PM, Csaba Henk wrote:

> module Exception::Continuable
>
>   def try &bl
>     bl.call
>   rescue Exception => exp
>     callcc do |cc|
>       exp.instance_variable_set :@continuation, cc
>       exp.instance_variable_set :@binding, bl
>       class << exp
>         attr_reader :continuation, :binding
>         def continue
>           @continuation.call
>         end
>       end
>       raise exp
>     end
>   end
>
> end
>
> class Object
>   include Exception::Continuable
> end
>
> class RetryException < Exception
> end
>
> def printStuff(inpu) ## just print stuff
>   puts "printing" + inpu.to_s
>   if inpu == 3
>     raise RetryException
>   end
> end
>
> begin
>   [1,2,3,4,5,6,7,8].each{|value| try do printStuff(value) end  }
> rescue RetryException => err
>   puts " inside rescuedo nothing"
>   err.continue
> rescue
>   puts "other exception"
> ensure
>   puts "insode ensire"
> end