From: matz@... (Yukihiro Matsumoto)
Date: 2003-07-09T12:18:13+09:00
Subject: Re: Question about #coerce

Hi,

In message "Question about #coerce"
    on 03/07/09, Jim Cain <list@jimcain.us> writes:

|What if x cannot be represented in the same class as y, but both could 
|be represented in a third class? Is it acceptable to return [y1, x1] 
|such that both objects have been rendered in a third class?

Acceptable.  It's only reason to return converted y1 *and* x1 from
coerce, although no known class does that yet.

|What if nothing can be done? Is it customary to raise an exception, or 
|return something like [y, nil]?

Raise TypeError exception.

							matz.