From: Christoph <chr_mail@...>
Date: 2005-03-30T08:24:31+09:00
Subject: Re: Modifying boolean values

Florian Gross schrieb:

>
> Unfortunately, there isn't in standard Ruby.
>
> The feature would as well be useful for doing full object proxies 
> (WeakRefs to false or nil currently misbehave).
>
> I suppose that you might be able to get this changed in standard Ruby 
> if you find that the slowdown caused by changing the RTEST() macro is 
> not too high. But I'm not sure if it is like that. Perhaps you could 
> also special case true, false and nil so that they would not go 
> through the RTEST() method call -- after all you already have one of 
> those values in most cases.
>
>
You can get an idea about the performance penalties from
my implementation using "false" flags, akin to frozen and
tainted flags.

www.ruby-talk.org/cgi-bin/scat.rb/ruby/ruby-core/279

/Christoph