On 8/3/2020 10:10 PM, Otared Kavian wrote:
Hi Hans,
A file which used to be typeset correctly with the previous versions of lmtx,
now produces an error. Despite the error message being extremely cryptic:
Error ! Missing number, treated as zero
I could guess the origin of the bug, which seems to be \wordright, but
although the following minimal example shows a bug it does not produce the same
ERROR output page:
%%%% the square ''end of proof''
\definesymbol[Fin][\mathematics{\square}]
\def\qed{\wordright{\symbol[Fin]}}
\starttext
\startformula
a^2 + b^2 = c^2
\stopformula
\qed % the problem is here
\stoptext
In the above example if one adds something before \qed, then the square
end-of-proof appears.
However in my real file ConTeXt ouputs an error page and says: Error !
Missing number, treated as zero.
One can debate if the old behavior was ok ... wordright is meant for
adding something at the end of a paragraph and you have none here. You
can add a \strut in your definition to force a line.
The lmtx implementation actually permit this:
\definesymbol[Fin][\mathematics{\square}]
\def\qed{\strut\wordright{\symbol[Fin1]}\wordright{\symbol[Fin2]}\wordright{\symbol[Fin3]}}
\starttext
\startformula
a^2 + b^2 = c^2
\stopformula
\qed % the problem is here
\stoptext
i'm still exploring this but it has to do with collecting stuff, as in:
\wordright{before} test \par
test \wordright{before} \par
(i'll look at the number issue which indeed looks a like a bug)
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Hans Hagen | PRAGMA ADE
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tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
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