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References: <YW0u7vN+Y/604YuY@polynum.com>
            <7777989c-8044-08a3-3a9d-2da8ec591a2b@morningstar2.co.uk>
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Message-ID:  <YW1/adkTRLBk4Npu@polynum.com>
Date:         Mon, 18 Oct 2021 16:06:33 +0200
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From:         LARONDE Thierry <tlaronde@POLYNUM.COM>
Subject: Re: expl3-code and Prote
To:           LATEX-L@LISTSERV.UNI-HEIDELBERG.DE
In-Reply-To:  <7777989c-8044-08a3-3a9d-2da8ec591a2b@morningstar2.co.uk>
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Envelope-To: <rainer.schoepf@gmx.net>
Status: R

Hello Joseph,

Le Mon, Oct 18, 2021 at 02:04:20PM +0100, Joseph Wright a �crit :
> Hello Thierry
> 
> >  From an engineering point of view, couldn't the code set everything with
> > some:
> > 
> > \ifx\engineversion\undefined
> > \else
> >    \input engine.tex
> > \fi
> > 
> > ? So that it's easier to see what depends on the engine and in order
> > for modifications to the engine to be severed from the rest of the code?
> 
> Very little of the code is engine-specific, and the parts that are are
> largely in separate files as you suggest. Broadly
> 
> - l3names needs to save primitives in a predictable way, so checks for
>   example for pdfTeX and LuaTeX names for the same concepts
> - l3sys sets up engine-specific paths
> - l3backend is split by backend: you likely are using dvips so
>   l3backend-dvips.def needs to be loaded
> 

OK, I will restrict my interventions to these .dtx.

Thanks!
-- 
        Thierry Laronde <tlaronde +AT+ polynum +dot+ com>
                     http://www.kergis.com/
                    http://kertex.kergis.com/
                       http://www.sbfa.fr/
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