[luatex] a problem with luatexUmathcode
jfbu
jfbu at free.fr
Sat Oct 13 13:14:56 CEST 2012
Le 12 oct. 2012 22:01, jfbu <jfbu at free.fr> wrote :
> Hi, [I just posted on c.t.tex, but figured here could be better]
>
> the following code gives dissimilar results for XeTeX
> and LuaLatex.
>
> \documentclass{article}
> \usepackage{ifxetex}
> \begin{document}
> \ifxetex
>
> \the\mathcode`\- % 8704="2200
> \the\XeTeXmathcodenum`\- % 37748736=2.2^{24} + 2.2^{21} + 0
>
> \else
>
> \the\mathcode`\- % 8704 = "2200
>
> \the\luatexUmathcodenum`\- % 8704, if interpreted as Unicode
> % mathcode 0.2^{24} + 0.2^{21} + 8704
> \fi
> \end{document}
>
> This is a bit strange. The problem with this behavior of LuaLaTeX
> is that I need to know *in advance* if I have to interpret the
> number resulting from \luatexUmathcodenum as a legacy mathcode
> or as a Unicode mathcode ! ...
>
> best wishes,
> Jean-Francois
Hi again
\documentclass{article}
\usepackage{ifxetex}
\begin{document}
\ifxetex
\the\XeTeXmathcodenum`\a % 31457377
\the\XeTeXmathcodenum`\1 % 14680113
\the\XeTeXmathcodenum`\- % 37748736
\else
\the\luatexUmathcodenum`\a % 31457377
\the\luatexUmathcodenum`\1 % 28721
\the\luatexUmathcodenum`\- % 8704
\fi
\end{document}
Why the difference between querying the mathcode of a and 1?
This makes it impossible for me to use \luatexUmathcodenum to
query the family number for 1 or -, as I can not know in advance
if it will return a legacy mathcode (as here) or a Unicode mathcode
(if 1 or - have been assigned Unicode mathcode).
Jean-Francois
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