From: Joel VanderWerf <vjoel@...>
Date: 2004-02-03T13:05:34+09:00
Subject: Re: Modules defining class methods to include?

Tim Bates wrote:
> Joel VanderWerf wrote:
> 
>> class Bar
>>   include Foo
>>   extend Foo
>> end
> 
> 
>   irb(main):017:0> Bar.new.foo
>   => "foo_instance"
>   irb(main):018:0> Bar.foo
>   => "foo_instance"
> 
> Not what I wanted.
> 

Oops. But you can do something like this:

module Foo
   def foo
     "foo_instance"
   end
   module Sub
     def foo
       "foo_class"
     end
   end
   extend Sub # so Foo.foo still works
   def Foo.included(aModule)
     super
     aModule.instance_eval do
       extend Sub
     end
   end
end

class Bar
   include Foo
end

p Bar.new.foo

p Bar.foo