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From: Hans Hagen <pragma@wxs.nl>
To: mailing list for ConTeXt users <ntg-context@ntg.nl>
Subject: Re: first steps with \dosingleempty
Date: Thu, 11 Sep 2008 09:21:41 +0200	[thread overview]
Message-ID: <48C8C705.5090100@wxs.nl> (raw)
In-Reply-To: <CBB3636EB677D345A9A354D258233415BF0F07@deimsg12.de.net.world>

Goebel, Juergen wrote:
> Hi,
> 
> Regarding the following example I've got two questions.
> 
> (1) Why don't I ever see the argument #2 in the output?
> (2) What do I have to do to suppress the unwanted space
> after the end of the output of this macro (as can be seen
> in the result before the following comma)?
> 
> Regards,
> 
> Juergen
> 
> 
> \def\Geb{\dosingleempty\doMyGeb}
> \def\doMyGeb[#1]#2#3{, x %
>    \iffirstargument%
>       Aha
>    \else
>      \ifsecondargument%
>        #2
>      \else%
>        ... %C%
>      \fi
>    \fi
>    \ifthirdargument%
>      #3%
>    \else%
>      ...%
>    \fi}
> 
> \starttext
> 
> \Geb{Ulm}{11. 9. 2008} % should deliver x Ulm 11. 9. 2008
> \Geb[Ulm]{Ulm}{11. 9. 2008} % should deliver x Aha Ulm 11. 9. 2008
> \Geb{}{11. 9. 2008} % should deliver x ... 11. 9. 2008
> \Geb{Ulm}{} % should deliver x Ulm ...
> \Geb{}{} % should deliver x ...
> 
> \stoptext

\unexpanded\def\Geb{\dosingleempty\doMyGeb}

\def\doMyGeb[#1]#2#3%
   {, x \iffirstargument Aha \fi
    \doifsomethingelse{#2}{#2}{...}\space
    \doifsomethingelse{#3}{#3}{...}%
    \par}


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  reply	other threads:[~2008-09-11  7:21 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-09-11  6:31 Goebel, Juergen
2008-09-11  7:21 ` Hans Hagen [this message]
2008-09-11  7:56   ` Goebel, Juergen
2008-09-11  8:04     ` Patrick Gundlach
2008-09-11 10:28       ` Goebel, Juergen
2008-09-11 10:37         ` Wolfgang Schuster
2008-09-11  8:12     ` Wolfgang Schuster

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