From: Payton Swick <payton@...>
Date: 2005-12-30T01:25:14+09:00
Subject: Re: get mixin's name

The goal was basically this for a GUI (the answer is probably that 
there's a better way):

module Layout
# ... layout stuff
def layout_name
'none'
end
end

module CoolLayout
include Layout
# ... override some layout stuff.
def layout_name
'CoolLayout' # Not DRY
end
end

class Window
def layout=(l)
extend l
end
end

a = Window.new
a.layout = CoolLayout
puts "This window has the layout #{a.layout_name}"

-Payton

Robert Klemme wrote:
> Payton Swick <payton@foolord.com> wrote:
> 
>> A somewhat weird situation.
>>
>> I have a module which I include in a class using Module#extend.  That
>> module defines an instance method which returns the name of the module
>> that defined the method.  Currently, I do that by hard-coding the
>> string into the method definition, but it seems that there should
>> really be a better way.
>>
>> Here's some code:
>>
>> irb(main):001:0> module Awesome
>> irb(main):002:1> def who_am_i
>> irb(main):003:2> 'Awesome' # Repeating myself, bad!
>> irb(main):004:2> end
>> irb(main):005:1> end
>> => nil
>> irb(main):006:0> class One
>> irb(main):007:1> def initialize(what)
>> irb(main):008:2> extend what
>> irb(main):009:2> end
>> irb(main):010:1> end
>> => nil
>> irb(main):011:0> a = One.new(Awesome)
>> => #<One:0x40322710>
>> irb(main):012:0> a.who_am_i
>> => "Awesome"
>>
>> -Payton
> 
> 
> If you want to find out the defining class of a method you can use #method:
> 
>>> module Awesome; def foo() end end
> 
> => nil
> 
>>> class One; include Awesome; end
> 
> => One
> 
>>> One.new.method(:foo).to_s
> 
> => "#<Method: One(Awesome)#foo>"
> 
> Btw, what do you need that for?
> 
> Kind regards
> 
>    robert
>