colors

[David Carlisle]

On Mon, 13 Jun 2022 at 13:00, Gérald Tenenbaum <gerald.ten at free.fr> wrote:

> Thank you.
> Actually, I found up that it is the update of the package graphics that
> broke the use of color, that was previously known to work with eplain. I
> reverted graphics to the previous version and color works again.
> Regards,
>
> Gérald
>

That may be OK on a personal installation if you don't use latex, but I
can't really recommend it. It's an untested and unsupportable configuration
and would break color and graphics support in latex

David.

>
> David Carlisle a écrit le 13/6/22 à 13:00 :
>
>
> You should I think be able to add
>
>
> \ifx\mathcolor\@undefined
>   % simplified version of \mathcolor
>   \protected\def\mathcolor{\begingroup\@ifnextchar[\mlx at mathcolora
> \mlx at mathcolorb}
>   \long\def\mlx at mathcolora[#1]#2#3{\color[#1]{#2}#3\endgroup}
>   \long\def\mlx at mathcolorb#1#2{\color{#1}#2\endgroup}
> \fi
>
> to the end of miniltx.ltx  If  that works for your real documents I'll
> arrange an update at ctan
>
> David
>
>
> On Mon, 13 Jun 2022 at 10:56, Gérald Tenenbaum <gerald.ten at free.fr> wrote:
>
>> Hello,
>>
>> Here is a small file that used to work but doesn't anymore:
>>
>> \input eplain
>> \beginpackages
>> \usepackage{color}
>> \endpackages
>> \long\def\red#1{{\color{red}#1}}
>> \red{ab}
>> \bye
>>
>>
>> The error message is:
>>
>> This is pdfTeX, Version 3.141592653-2.6-1.40.24 (TeX Live 2022)
>> (preloaded format=pdftex)
>>  restricted \write18 enabled.
>> entering extended mode
>> (./essai.tex (/usr/local/texlive/2022/texmf-dist/tex/eplain/eplain.tex)
>> (/usr/local/texlive/2022/texmf-dist/tex/plain/graphics-pln/miniltx.tex)
>> (/usr/local/texlive/2022/texmf-dist/tex/latex/graphics/color.sty
>> (/usr/local/texlive/2022/texmf-dist/tex/latex/graphics-cfg/color.cfg)
>> (/usr/local/texlive/2022/texmf-dist/tex/latex/graphics-def/pdftex.def)
>> (/usr/local/texlive/2022/texmf-dist/tex/latex/graphics/mathcolor.ltx
>> /usr/local/texlive/2022/texmf-dist/tex/latex/graphics/mathcolor.ltx:21:
>> Undefined control sequence.
>> l.21 \ExplSyntaxOn
>>
>> Many thanks for help.
>> Regards,
>>
>> Gérald
>>
>
>
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