From: William Morgan <wmorgan-ruby-talk@...>
Date: 2005-03-13T04:54:54+09:00
Subject: Re: Ruby black magic? Meta Programming

Excerpts from ES's mail of 12 Mar 2005 (EST):
> You can achieve the same effect by creating a meta for something like
> def_pre :methodname, def_post :methodname with associated blocks. Then
> alias the actual :methodname, make the pre block respond to
> :methodname; pre executes its block and then calls :methodname, after
> which post block is called.

See http://www.thekode.net/ruby/techniques/CapturingMethods.html for an
example implementation (which doesn't use alias).

But there are limitations to this technique that will only be resolved 
in 2.0.

-- 
William <wmorgan-ruby-talk@masanjin.net>