From: Shugo Maeda <shugo@...>
Date: 2001-03-07T14:40:02+09:00
Subject: [ruby-talk:12208] Re: Ruby API function to check for "true"-ness?

At Tue, 6 Mar 2001 17:35:21 -0600,
Lyle Johnson <ljohnson@resgen.com> wrote:
> and some typical responses would be:
> 
>     rb_is_true(Qtrue) = 1
>     rb_is_true(Qfalse) = 0
>     rb_is_true(UINT2NUM(1)) = 1
>     rb_is_true(UINT2NUM(0)) = 0

rb_is_true(UINT2NUM(0)) should not return 0, because 0 does not
mean false in Ruby. Indeed, RTEST(UINT2NUM(0)) returns 1.
# RTEST(Qnil) returns 0.

Shugo