From: matz@... (Yukihiro Matsumoto)
Date: 2002-09-11T00:22:58+09:00
Subject: Re: ruby-dev summary 18111-18212

Hi,

In message "Re: ruby-dev summary 18111-18212"
    on 02/09/10, Paul Brannan <pbrannan@atdesk.com> writes:

|Interesting.  Is this what "become" does in Smalltalk?

It's not.  I've heard Smalltalk "become" is too dangerous.
# perhaps I have to choose another name.  Ideas?

|if I want to implement dup/clone for an object in an extension, what is
|the correct way to do this so that it will work with both 1.6 and 1.7?

define both clone and become, e.g.

  def become(orig)
    # copy internal state
  end

  def clone
    c = super
    c.become(self)
  end

in 1.7 become is called twice, but it should be OK.

							matz.