From: Eric Mahurin <eric_mahurin@...>
Date: 2005-07-07T01:30:53+09:00
Subject: Re: Object#=~

--- Yukihiro Matsumoto <matz@ruby-lang.org> wrote:
> <dooby@d10.karoo.co.uk> writes:
> 
> |I expected you to say that this was intentionally provided
> |as a "third state":
> |
> |true  - positive pattern match result
> |nil   - negative pattern match result
> |false - don't know (no match was done)
> 
> Hmm, sorry for behaving unexpectedly.  But I like your idea.
> Ryan, what do you think?
> 
> 							matz.

Should nil be don't know and false be mismatch?  That would be
consistent with <=> which returns nil if the items aren't
comparable.  Maybe the same should be done with == and === -
return nil instead of false when the 2 objects can't be
compared.




		
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