From: dblack@...
Date: 2006-09-27T19:15:44+09:00
Subject: Re: Modules, instance methods and class methods

Hi --

On Wed, 27 Sep 2006, Vincent Fourmond wrote:

>
>  Hello !
>
>> Not too long ago this was discussed with a length with Matz. The result
>> was #class_extension.
>>
>>  module Base
>>     def desc
>>       return self.class.desc
>>     end
>>
>>     class_extension do
>>       def desc
>>         return @desc
>>       end
>>     end
>>   end
>>
>>   class ThisClass
>>      include Base
>>   end
>>
>> An excellent pure Ruby implementation of this was developed by Daniel
>> Schierbeck, It can be found it the Facets project
>> (facets.rubyforge.org). To use: require 'facet/module/class_extension'.
>> For convenience the code follows.
>
>  Thanks !
>
>> It remains to be seen if Matz ultimately goes with this approach in
>> Ruby 2.0. But as of yet I guess one could say it the most "official"
>> technique available. (Not to say that others are prefectly valid of
>> course)
>
>  That would be cool if the syntax could be somewhat lighter: it somehow
> doesn't look right to me to have the code within a block. But that's
> just aesthetics... And that would be for ruby 2.0, if I understand right.

I agree; it seems odd to resort to a block when generally the
inclusion/extension mechanism involves modules.  Also, the terminology
is a bit narrow; it should really be 'includer_extension' or
something, since modules can be included by modules as well as
classes.


David

-- 
                   David A. Black | dblack@wobblini.net
Author of "Ruby for Rails"   [1] | Ruby/Rails training & consultancy [3]
DABlog (DAB's Weblog)        [2] | Co-director, Ruby Central, Inc.   [4]
[1] http://www.manning.com/black | [3] http://www.rubypowerandlight.com
[2] http://dablog.rubypal.com    | [4] http://www.rubycentral.org