[luatex] \mathchardef\foo=\mathcode`\x

[jfbu]

Le 18 déc. 2015 à 22:57, jfbu <jfbu at free.fr> a écrit :

> Hi David,
> 
>> 
>> [snip]
>> David
>> 
>> For people wanting to use amsmath, a fix would be to change line 741
>> of amsmath,sty  so it looks something like
>> 
>> \ifx\hyphenationmin\undefined
>> \mathchardef\std at minus\mathcode`\-\relax
>> \mathchardef\std at equal\mathcode`\=\relax
>> \AtBeginDocument{%
>> \mathchardef\std at minus\mathcode`\-\relax
>> \mathchardef\std at equal\mathcode`\=\relax
>> }
>> \else
>> \Umathcharnumdef\std at minus\Umathcodenum`\-\relax
>> \Umathcharnumdef\std at equal\Umathcodenum`\=\relax
>> \AtBeginDocument{%
>> \Umathcharnumdef\std at minus\Umathcodenum`\-\relax
>> \Umathcharnumdef\std at equal\Umathcodenum`\=\relax
>> }
>> \fi
> 
> I thought package lualatex-math by Philipp Stephani addressed
> these amsmath problems with \std at minus and \std at equal already ?
> 
> as per  mathastext.sty package, it already does the right thing
> but in a rather brutal way regarding \@newmcodes macro or amsmath
> 
> (it replaces it by \relax :-( )

sorry, please read \newcodes@, used in \DeclareMathOperator and doing

\gdef\newmcodes@{\mathcode`\'39\mathcode`\*42\mathcode`\."613A%
  \ifnum\mathcode`\-=45 \else
    \mathchardef\std at minus\mathcode`\-\relax
  \fi
  \mathcode`\-45\mathcode`\/47\mathcode`\:"603A\relax}


which has the \mathcode/\mathchardef issue if one has assigned
an Umathcode to -

best

Jean-François