From: Logan Capaldo <logancapaldo@...>
Date: 2006-08-17T00:06:49+09:00
Subject: Re: goto function?


On Aug 16, 2006, at 7:55 AM, Christian Neukirchen wrote:

> "David Vallner" <david@vallner.net> writes:
>
>> The BASIC construct of "goto" is rightfully considered harmful for
>> programs above a certain complexity. It's not present in Ruby in any
>> direct way that would let you jump around a program's structure
>> arbitrarily. (Actually, that's a lie, but I'll hold the continuations
>> for  the sake of simplicity.)
>
> It is often said that continuations are as powerful as goto.
> But is there a way to jump *forward* with continuations, without
> rewriting the code to use additional methods?
>

Jumping forward:

callcc do |cc|
   puts "Some code"
   puts "Some more code"
   cc.call # jump forward
   puts "I'm never executed"
end
puts "Whee!"


>> David Vallner
> --  
> Christian Neukirchen  <chneukirchen@gmail.com>  http:// 
> chneukirchen.org
>