From: Hans Hagen via ntg-context <ntg-context@ntg.nl>
To: mailing list for ConTeXt users <ntg-context@ntg.nl>
Cc: Hans Hagen <j.hagen@xs4all.nl>
Subject: Re: Weird error when using \startformula inside lua
Date: Sat, 11 Sep 2021 08:57:18 +0200 [thread overview]
Message-ID: <e97eca95-0ac8-0e32-672f-5fe03b0fecdb@xs4all.nl> (raw)
In-Reply-To: <nycvar.YAK.7.78.908.2109102305430.1211317@nqv-guvaxcnq>
On 9/11/2021 5:11 AM, Aditya Mahajan via ntg-context wrote:
> I sometimes define lua functions for showing out worked out calculations. The following minimal example shows that
>
> context([[\startformula ... \stopformula]])
>
> fails in LMTX with an error message:
>
> tex error > tex error on line 3 in file ./test.tex: Undefined control sequence \undefined
>
> MWE:
>
> \startluacode
> thirddata = thirddata or {}
>
> local comment = [[
> This is a famous formula
> \startformula
> a^2 + b^2 = c^2
> \stopformula
> ]]
>
> function thirddata.explanation()
> context(comment)
> end
>
> \stopluacode
>
> \starttext
> \ctxlua{thirddata.explanation()}
> \stoptext
>
> The actual use case is more complicated (where I use templates, so I don't want to convert everything to context.startformula() etc.). The example compiles with MkIV but not LMTX.
>
> Any idea what is going on?
\enabletrackers[context*]
shows that we have an unprotected \startformula so we need this in
strc-mat.mkxl:
\permanent\protected\defcsname\e!start\v!formula\endcsname{\strc_formulas_start_formula{}}
\permanent\protected\defcsname\e!stop
\v!formula\endcsname{\strc_formulas_stop_formula}
\permanent\tolerant\protected\def\defineformulaalternative[#1]#*[#2]#*[#3]%
{\frozen\instance\protected\defcsname\e!start#1\v!formula\endcsname{#2}%
\frozen\instance\protected\defcsname\e!stop #1\v!formula\endcsname{#3}}
(the \protected probably got lost when i added overload protection etc)
Hans
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next prev parent reply other threads:[~2021-09-11 6:57 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-11 3:11 Aditya Mahajan via ntg-context
2021-09-11 6:57 ` Hans Hagen via ntg-context [this message]
2021-09-12 1:13 ` Aditya Mahajan via ntg-context
2021-09-12 13:41 ` Sylvain Hubert via ntg-context
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