From: Martin Hart <martin@...>
Date: 2002-12-12T09:03:55+09:00
Subject: How to detect Module Inclusion for Class Instances (like Module#extend_object)?


Hi all.

Is there a way to tell that a module is being included by a class?  
Specifically I want to detect this for instances of the class in question 
- sort of like using #extend_object.

For example,

module Mod
  def Mod.extend_object(object)
    object.someInstanceFunction
    super
  end
end


Now "someInstanceFunction" gets called if I do something like...

class Blah
  def someInstanceFunction
    ...
  end
end

object = Blah.new.extend(Mod)


...But, If I do this...

class Blah
  include Mod

  def someInstanceFunction
    ...
  end
end

object = Blah.new


... extend_object doesn't get called (unsurprisingly I guess) - so nor 
does "someInstanceFunction" - which is my problem.


Currently using ruby 1.6.6 (2002-01-21) [i686-linux]

Is there a way to call my instance function when the object is 
instantiated regardless of whether the module was included by #extend or 
by using include?



Cheers,

Martin


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