From: Ryan Davis <ryand-ruby@...>
Date: 2009-01-19T04:21:42+09:00
Subject: [ruby-core:21412] Re: Proposal: Module#copy_method


On Jan 18, 2009, at 08:23 , Eero Saynatkari wrote:

> Excerpts from Pit Capitain's message of Sun Jan 18 11:23:48 +0200  
> 2009:
>> 2009/1/18 Yehuda Katz <wycats@gmail.com>:
>>> I'd like it to be possible to copy methods from one module to  
>>> another. (...)
>>
>> Note that on 1.8 you can simply change the line
>>
>>  copy_method me, name
>>
>> to
>>
>>  define_method(name, me.instance_method(name))
>>
>> and it works without #copy_method.
>
> Only if me <= self, though? One can work around that
> by using Method#to_proc, but it has its own problems.

I was going to point out the same thing, but it is a 1 line removal to  
make that not that case and I think it is worth it. Much easier and it  
opens up a whole lot of possibilities.

> I am still not entirely sure of the use case, but I
> take Yehuda at his word that he actually uses "foo"
> in real code ;)

actors or instance-based-inheritance (ala self) are two use cases. I'd  
love to do the latter more.