Re: new error in Context-Metapost

[Hans Hagen <pragma@wxs.nl>]

On 2/17/2016 11:27 AM, Meer, Hans van der wrote:
> Some code that worked ok but hasn't been used for some time, now gives
> an error: missing $.
> It is working fine in ConTeXt, but putting it inside an MPpage goes wrong.

That was a tricky one to nail down ... it related to the fact that have 
\{ and \} have a different meaning when we flush metapost text (makes me 
wonder if that is still needed)

this helps

\installmathfencepair
   \letteropenbrace \Lbrace
   \letterclosebrace \Rbrace


> Here a minimal example, the output of the ConTeXt run and the error on
> the MPpage run.
> Has something changed I missed?
>
> Hans van der Meer
>
>
> The error occurs in this code, my suspect is the cases macro.
> \starttext
> \startsetups[dif-1]
> $\displaystyle
> \Delta_{in} = 1000_2 \cases{(A,2)(2,A)&\cr (6,E)(E,6)&\cr}
> \buildrel S_1 \over \rightarrow \quad
> \Delta_{uit} = 1011_2 \cases{(6,D)(D,6)&\cr (B,0)(0,B)&\cr}
> $
> \stopsetups
> \startMPpage
> label("\setup[dif-1]",origin);
> \stopMPpage
> \stoptext
>
> tex error       > tex error on line 9 in file
> /Users/hansm/Documents/TeX/Test-tex/cases/cases.tex: ! Missing $ inserted
>
> <inserted text>
> $
> <to be read again>
> \endgroup
> \math_fenced_fenced_stop ...leparameter \endgroup
>                                                    \advance
> \c_math_fenced_ne...
> \14>:dif-1 ...ses {(A,2)(2,A)&\cr (6,E)(E,6)&\cr }
>                                                    \buildrel S_1 \over
> \right...
> l.9 ...edfont[LMRoman-Regular*default]\setup [dif-1]
>
>
> <to be read again>
> \relax
> ...
> l.12 \stopMPpage
>
> The ConTeXt run itself is ok, see below
>
> \starttext
> \startsetups[dif-1]
> $\displaystyle
> \Delta_{in} = 1000_2 \cases{(A,2)(2,A)&\cr (6,E)(E,6)&\cr}
> \buildrel S_1 \over \rightarrow \quad
> \Delta_{uit} = 1011_2 \cases{(6,D)(D,6)&\cr (B,0)(0,B)&\cr}
> $
> \stopsetups
> \setup[dif-1]
> \stoptext
>
>
>
>
>
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to the Wiki!
>
> maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
> webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
> archive  : http://foundry.supelec.fr/projects/contextrev/
> wiki     : http://contextgarden.net
> ___________________________________________________________________________________
>


-- 

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                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
       tel: 038 477 53 69 | www.pragma-ade.com | www.pragma-pod.nl
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___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
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