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Re: Why is booleanp defined this way?


From: Barry Margolin
Subject: Re: Why is booleanp defined this way?
Date: Fri, 17 Apr 2015 23:12:40 -0400
User-agent: MT-NewsWatcher/3.5.3b3 (Intel Mac OS X)

In article <address@hidden>,
 Emanuel Berg <address@hidden> wrote:

> Barry Margolin <address@hidden> writes:
> 
> > (booleanp nil) => (nil t)
> > (booleanp t) => (t)
> > (booleanp something-else) => nil
> 
> Really? This is what I get:
> 
>     (booleanp nil) ; t
>     (booleanp t)   ; t
>     (booleanp 1)   ; nil

I know. I was showing what you would get if it didn't use (and ... t) to 
canonicalize the value.

-- 
Barry Margolin, address@hidden
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***


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