Re: ifdim ... or ... else ...

[Hans Hagen <pragma@wxs.nl>]

Marcin Borkowski wrote:
> Dnia Wed, Sep 10, 2008 at 01:49:52PM +0200, Steffen Wolfrum napisał(a):
>> Hi,
>>
>>
>> I'd like to change the phrase
>>
>> "if lastskip equals \EinsSignal set vskip to 0pt else ..."
>>
>> to
>>
>> "if lastskip equals \EinsSignal set vskip to 0pt else if lastskip  
>> equals \\ZweiSignal set vskip to -2pt else ... "
>>
>>
>> in the following code ...
>>
>> \newsignal\ZweiSignal
>> \def\EbeneDreibefore {\ifdim\lastskip=\EinsSignal \vskip-0pt \else  
>> \blank[20pt]\fi}
>> \setuphead[EbeneDrei][...,before=\EbeneDreibefore,...]
> 
> What about just that you wrote?
> 
> \ifdim ... \else\ifdim ... \fi\fi
> 
>>
>> Some native (tex)speaker can help me translating?
> 
> Non-native, but close (OTOH, not so close as Hans;))

ok then, an obscure solution for the natives ... untested:

\setvalue{Ebene:\the\dimexpr 0pt\relax}{1pt}
\setvalue{Ebene:\the\dimexpr 1pt\relax}{-2pt}

\vskip\executeifdefined{Ebene:\the\lastskip}{0pt}\relax


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