From: Dale Martenson <dale.martenson@...>
Date: 2008-05-20T08:00:03+09:00
Subject: Instance Variable in Mixins

I am trying to get access to an instance variable. I have simplified
my usage down to the following example.

=== start-of-code

module A
  def A.a
    puts "A:#{@u}"
  end
end

module B
  def b
    puts "B:#{@u}"
  end
end

module C
  include A
  include B
end

class Blah
  include C

  def initialize(u)
    @u = u
  end

  def go
    A.a
    b
  end
end

blah = Blah.new("bob")

blah.go

=== end-of-code

My main question is that how can I get at the instance variable @u
from within module A. I can use it fine from module B so I assume it
is a namespace problem. It turns out that due to the way my mixins are
used, I need to guard them against duplication. I guess I could use a
prefix "def moduleA_a ... end" (El Yucko).

I am using ruby 1.8.6.

Thanks in advance,
Dale