From: "Mauricio Fernández" <mfp@...>
Date: 2005-11-17T11:00:18+09:00
Subject: Re: Object#to_b

On Thu, Nov 17, 2005 at 10:25:03AM +0900, Jeremy Kemper wrote:
> On Nov 16, 2005, at 5:11 PM, Yukihiro Matsumoto wrote:
> >In general, such attempt to define new false values is not worth the
> >performance cost we all have to pay.
> 
> I would not like new false values, but I would like to be able to proxy
> the existing false values.  Especially nil.
> 
> What is the cost?

A full method dispatch instead of an inlined test

  #define RTEST(v) (((VALUE)(v) & ~Qnil) != 0) 

-- 
Mauricio Fernandez