From: "Chr. Rippel" <chr_news@...>
Date: 2001-12-21T08:50:51+09:00
Subject: [ruby-talk:29182] Re: Why is UnboundMethod a subclass of Method? (was Re: overriding methods: (almost) a replacement for alias_method)

> Well, a Method is really a BoundMethod, and a BoundMethod is not an
> UnboundMethod.  In my mind, it doesn't really make sense to have Method
> inherit from UnboundMethod.
On the other hand to claim that UnboundMethod is a special kind of (bounded)
Method makes even less sense IMO - the current implementation adds the
method
#bind to UnboundMethod but it also needs to override three methods
#call    - raises an exception
#to_prog - returns a prog which that raises an exception when called
#unbind  - returns the unbound method itself.
Subclassing (Bounded)Method from UnboundedMethod is much less
problematic (only bind needs to be overridden with the sematics ``rebind")
but as Guy points out UnboundMethod already exists in 1.6 so there is no
chance that this will be changed in 1.8.

......

/Christoph