From: Bob Alexander <bobalex@...>
Date: 2002-01-26T13:54:10+09:00
Subject: Re: Subrange of String subclass => invalid object

"Chr. Rippel" <chr_news@gmx.net> wrote:
> Meaning this violates YMPOLS (your and my POLS;-).  Actually a heavily
> championed and accepted recent RCR www.rubygarden.org/article.php?sid=104
> is probably responsible for this sneaky type attack.
> A general way of dealing with these issues would be the introduction of a
> general #become framework - an interesting pointer is [ruby-talk:19856].


Thanks for the pointers. I read those, and saw no mention of the fact that
String and Array returning uninitialized instances of a subclass creates
invalid objects. The focus seemed to be on trivial subclasses that simply
added methods but no state, where no subclass initialization needs to be
done.


Bob