From: Hans Hagen <j.hagen@xs4all.nl>
To: Aditya Mahajan <adityam@umich.edu>,
"ntg-context@ntg.nl >> mailing list for ConTeXt users"
<ntg-context@ntg.nl>
Subject: Re: Bug when mathmatrix is used inside mathalign
Date: Wed, 27 Mar 2019 18:13:51 +0100 [thread overview]
Message-ID: <80bdf3d3-e4cf-8332-ce67-1a3d355d5a18@xs4all.nl> (raw)
In-Reply-To: <nycvar.YAK.7.76.44.1903271155390.12837@ervasbepr.pvz.zptvyy.pn>
On 3/27/2019 4:56 PM, Aditya Mahajan wrote:
> Hi,
>
> It was reported on TeX.SE[1] that there is a bug when math matrix is used
> inside a math align:
>
> \starttext
> \startformula
> \startalign[n=2,align={right,left}]
> \NC x
> \NC = a ~ long ~ sequence ~ of ~ terms
> \NR
> \NC y
> \NC = ok ~ left
> \NR
> \NC \startmatrix[left={\left\lbrack},right={\right\rbrack}]
> \NC x \NR
> \NC y \NR
> \stopmatrix
> \NC = why ~ right?
> \NR
> \NC y
> \NC = ok ~ left ~ again
> \NR
> \stopalign
> \stopformula
> \stoptext
>
> gives
>
> https://i.stack.imgur.com/ZTAp3.png
>
> It appears that \startmatrix globally resets \NC. I haven't looked into
> the code yet to see why this is happening.
you can play with
\unprotect
\newcount\c_math_eqalign_column_saved
\newcount\c_math_eqalign_first_saved
\unexpanded\def\math_matrix_start#1%
{\begingroup
\c_math_eqalign_column_saved\c_math_eqalign_column
\c_math_eqalign_first_saved \c_math_eqalign_first
\edef\currentmathmatrix{#1}%
\dosingleempty\math_matrix_start_indeed}
\def\math_matrix_stop
{\math_matrix_stop_processing
\global\c_math_eqalign_column\c_math_eqalign_column_saved
\global\c_math_eqalign_first\c_math_eqalign_first_saved
\endgroup}
\protect
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next prev parent reply other threads:[~2019-03-27 17:13 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-27 15:56 Aditya Mahajan
2019-03-27 17:13 ` Hans Hagen
2019-03-27 17:13 ` Hans Hagen [this message]
2019-03-27 23:09 ` Aditya Mahajan
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