From: Csaba Henk <"csaba@..."@...>
Date: 2006-07-22T08:20:08+09:00
Subject: Re: contine after exception

On 2006-07-21, junkone@rogers.com <junkone@rogers.com> wrote:
> How do i continue a loop after a exception? It actually captures the
> exception . How do i get the exception handler to start executing from
> 4 to call the printstuff function?
>
>
> def printStuff(inpu) ## just print stuff
>   puts "printing" + inpu.to_s
>  if (inpu==3)
>     raise  RetryException.new(true)
>   end
>  # raise  RuntimeError
> end
> def enter1
> begin
>       [1,2,3,4,5,6,7,8].each{|value| printStuff(value)}#call function
> to print.
>
>
> rescue RetryException
>
> puts " inside rescuedo nothing"
> ###QUESTION: how to continue calling
> #puts dd.okToRetry
>
> rescue
> puts "other exception"
> ensure
> puts "insode ensire"
> end
> end
> end

Do you think of something like this?

#############################################

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

===========>

printing1
printing2
printing3
 inside rescuedo nothing
printing4
printing5
printing6
printing7
printing8
insode ensire


#############################################


Regards,
Csaba