From: Michel Demazure <michel@...>
Date: 2011-02-13T19:51:33+09:00
Subject: DCI and ruby

The following post is interesting

http://andrzejonsoftware.blogspot.com/2011/02/dci-and-rails.html

In the DCI way, an object can be assigned a role by extending a module
bringing the methods pertaining to this role

obj = Klass.new
obj extend Role

But, how to change roles, without cluttering the metaclass hierarchy ?

obj unextend Role # ?
obj extend NewRole

But, even with an ah-hoc unextend, one needs to remember the old role.
Therefore, what about a 'temp_extend Module' method, which clears the
previous 'temp_extension' ?

_md

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