From: Hans Hagen <pragma@wxs.nl>
To: mailing list for ConTeXt users <ntg-context@ntg.nl>
Subject: Re: unusual behaviour of \if(x)
Date: Wed, 01 Jun 2011 15:56:06 +0200 [thread overview]
Message-ID: <4DE644F6.5070107@wxs.nl> (raw)
In-Reply-To: <BANLkTi=GJLxM6Aiw8PtPYezXf0iBt3cU0Q@mail.gmail.com>
On 1-6-2011 3:46, luigi scarso wrote:
> 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
hm, you want to start an \ifx pissing contest ... ?
\ifx\hbox\undefined
\message{invisible to tex}
\newif\ifabc \abcfalse
\ifcsname ifabc\endcsname \message{abc true breaks} \else
\message{abc false breaks} \fi
\fi
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next prev parent reply other threads:[~2011-06-01 13:56 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
2011-06-01 13:56 ` Hans Hagen [this message]
2011-06-01 14:01 ` luigi scarso
2011-06-01 14:09 ` Wolfgang Schuster
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