From: luigi scarso <luigi.scarso@gmail.com>
To: mailing list for ConTeXt users <ntg-context@ntg.nl>
Subject: Re: unusual behaviour of \if(x)
Date: Wed, 1 Jun 2011 15:46:37 +0200 [thread overview]
Message-ID: <BANLkTi=GJLxM6Aiw8PtPYezXf0iBt3cU0Q@mail.gmail.com> (raw)
In-Reply-To: <BANLkTimeq2MU5vh_1ib0m=WdX=SKkkRpvg@mail.gmail.com>
On Wed, Jun 1, 2011 at 3:26 PM, Mojca Miklavec
<mojca.miklavec.lists@gmail.com> wrote:
> Dear magitians,
>
> I discovered this in LaTeX, but ConTeXt behaves the same (plain TeX
> behaves differently). Can somebody please explain me why this code
> fails to work? (A workaround is to move \newif on top which I'm
> willing to do, but I'm still curious.)
>
> \starttext
>
> \ifx\hbox\undefined
> \message{invisible to tex}
> \newif\ifabc \abcfalse
> \ifabc \message{abc true breaks} \else \message{abc false breaks} \fi
> \fi
>
> \stoptext
(see wolfgang)
this works
\newif\ifabc
\starttext
\ifx\dhbox\undefined
\message{dhbox invisible to tex}
\abcfalse
\ifabc \message{abc true breaks} \else \message{abc false breaks} \fi
\fi
\ifx\hbox\undefined
\message{hbox invisible to tex}
\abcfalse
\ifabc \message{abc true breaks} \else \message{abc false breaks} \fi
\fi
\stoptext
--
luigi
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next prev parent reply other threads:[~2011-06-01 13:46 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-01 13:26 Mojca Miklavec
2011-06-01 13:36 ` Wolfgang Schuster
2011-06-01 13:52 ` Mojca Miklavec
2011-06-01 14:08 ` Hans Hagen
2011-06-01 14:10 ` luigi scarso
2011-06-01 13:46 ` luigi scarso [this message]
2011-06-01 13:56 ` Hans Hagen
2011-06-01 14:01 ` luigi scarso
2011-06-01 14:09 ` Wolfgang Schuster
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