From: Paul Brannan <pbrannan@...>
Date: 2003-03-18T01:29:15+09:00
Subject: Re: Iterator using Continuations

On Mon, Mar 17, 2003 at 03:29:28AM +0900, Hans J�rg Hessmann wrote:
> What do you think of this approach? Is there an easier way to do it?

This looks like a reasonable approach, particularly for an example.

Some comments:
  1) What happens if @enum.each raises an exception?  (I think that it
     will appear that the exception is coming from #initialize rather
     than #next, which might not be the desired behavior).
  2) This approach to iterating is very slow.  It's better to make a few
     iterations at a time, so you don't have to call @next every time
     you want a new element.

See [ruby-talk:35757] and the following thread for lots of links to
other people who have implemented this style of iterator in Ruby.

Paul