From: Jeff Rose <rosejn@...>
Date: 2006-05-23T21:23:54+09:00
Subject: Re: initializing instance variables in a module

Yukihiro Matsumoto wrote:
> Hi,
> 
> In message "Re: initializing instance variables in a module"
>     on Tue, 23 May 2006 00:51:35 +0900, Jeff Rose <rosejn@gmail.com> writes:
> 
> |Is there a standard or correct way to initialize @foo_the_stuff in this 
> |example?
> 
> This is not the answer, but I have been aware of this issue.  I'm
> planning to add method combination a la CLOS in the future to support
> this issue.  It is another option that adding a new hook like
> 'module_initialize' which is called at instantiation time for all
> modules.
> 
> 							matz.

That would do the trick, and it would probably make the AOP people very 
happy.  But that is a bit different than an explicit module 
initialization method.  Is there a reason you don't want 
module_initialize or something like that?

CLOS does something like (defmethod rock :before ...), right?  Any ideas 
on how the method combination would work in ruby?

# Maybe using methods...
module Rocker
   def pre_rock
     puts 'pre rock'
   end

   before :rock, :pre_rock
end

# Or with syntax...
module Rocker
   def before:rock
     puts 'pre rock'
   end
end

class Foo
   include Rocker

   def rock
     puts 'We are rocking'
   end
end

Foo.new.rock # => "pre rock\nWe are rocking\n"

-Jeff