Re: [NTG-context] mathmatrix vs substack

11 Sep 2017


      On 9/11/2017 6:59 AM, Henri wrote:
...
Dear devs,
Thank you very much for fixing this one
https://mailman.ntg.nl/pipermail/ntg-context/2017/089790.html
Unfortunately it seems like you broke substack and mathmatrix on the way.  MWE below fails
with version 2017.09.08 17:24
Cheers, Henri
---
\starttext
\placeformula
\startformula
   \sum_{\startsubstack
     \NC k \NR
     \NC \omega_n \NR
   \stopsubstack}
\stopformula
\placeformula
\startformula
   \startmathmatrix[left=\left|,right=\right|]
     \NC 0 \NC 1 \NR
     \NC 1 \NC 0 \NR
   \stopmathmatrix
   = -1 .
\stopformula
\stoptext
% no tagging yet : how is it supposed to be coded? no time now anyway
\unexpanded\def\startsubstack
   {\begingroup
    \vcenter\bgroup
    \baselineskip\mathstacktotal
    \lineskip\mathstackvgap
    \lineskiplimit\lineskip
    \mathsurround\zeropoint
    \everycr\emptytoks
    \let\NC\relax
    \let\MC\relax
    \let\NR\crcr
 
\halign\bgroup\hfil\normalstartimath\scriptstyle\alignmark\alignmark\normalstopimath\hfil\crcr}

\def\stopsubstack
   {\crcr
    \egroup
    \egroup
    \endgroup}


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