From: Andreas Launila <ruby-talk@...>
Date: 2007-06-12T03:19:24+09:00
Subject: Constants and metaclasses

Is there a way to define a constant in a metaclass and then have it used
in methods defined in the original class?

An example:


class Foo
  def foo
    p BAR
  end
end

f = Foo.new
class <<f
  BAR = "Hello"

  def bar
    p BAR
  end
end

f.bar
f.foo


The line "f.bar" will work fine, but "f.foo" will fail with "NameError:
uninitialized constant Foo::BAR". Is there some way to have the method
defined in the original class pick up on the constant in the metaclass
(without altering "p BAR")?

-- 
Andreas Launila