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            <42b1c81a-269e-6e92-61ae-81309d2f59f0@morningstar2.co.uk>
            <ZMPbRbBvKEsaL3xW@polynum.com>
            <e04314e7-2c7c-9832-4e94-ae6ed63f7953@nag.co.uk>
            <cdf0f0b4-fec2-db51-36fb-7f578b8bdfcf@morningstar2.co.uk>
            <ZMPiT40+/5h25GY5@polynum.com>
            <f1b86bed-c65e-e919-b5d1-402f265b4d07@morningstar2.co.uk>
            <9bdba073-3e55-a6b6-f95e-9d4a2eb007ca@morningstar2.co.uk>
            <ZMP6IgKkhS3pdsP+@polynum.com> <19vogp84f1o55$.dlg@nililand.de>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
Message-ID:  <ZMQF9IObP2zeUd+Q@polynum.com>
Date:         Fri, 28 Jul 2023 20:16:20 +0200
Reply-To:     Mailing list for the LaTeX3 project
              <LATEX-L@LISTSERV.UNI-HEIDELBERG.DE>
Sender:       Mailing list for the LaTeX3 project <LATEX-L@LISTSERV.UNI-HEIDELBERG.DE>
From:         LARONDE Thierry <tlaronde@POLYNUM.COM>
Subject: Re: "new" \input vs. primitive behavior
To:           LATEX-L@LISTSERV.UNI-HEIDELBERG.DE
In-Reply-To:  <19vogp84f1o55$.dlg@nililand.de>
Precedence: list
Envelope-To: <rainer.schoepf@gmx.net>
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Status: R

On Fri, Jul 28, 2023 at 07:55:54PM +0200, Ulrike Fischer wrote:
> Am Fri, 28 Jul 2023 19:25:54 +0200 schrieb LARONDE Thierry:
> 
> >> Note that in order to do file testing by expansion (which we want for
> >> various expl3 functions), we *have* to avoid \openin and that realistically
> >> means \(pdf)filesize is the best option.
> > 
> > Why in this case not having requested a \filefind primitive,
> 
> Adding new primitives to all engines LaTeX supports is not easily
> done, it can take a year or more and even if they are finally
> implemented we would have to provide fallbacks for older engines.
> So why should we do this work if a suitable primitive is already
> present in all engines engines we test? 
> 
> Imho the question is more the other way round: why did you
> implemented the primitive differently to the other engines? As you
> explicitly document "but no extension is implicit" you must have
> been aware that one must consider this case and that you are
> deviating here.

No: I didn't know what others were doing. I refused to read others
code. All I wanted was a description of the API (and this was mainly
lacking).

I simply thought about the feature: when wanting the size, it can
be for whatever file.  Adding automatically an extension was
preventing from obtaining the size of a file without an extension and
this was not giving the size of the file as specified (being partly
specified, not absolute was not a problem; changing the filename was).
This was stupid to not be able to obtain the size of a filename
without extension or to alter the filename. So I didn't implement
it this way but, contrary to the others, I tried to described
precisely what the implementation was doing so that somebody reading
the description would have an accurate description of the behavior.

I have explained the corner cases of the date primitives to. This does
not come either from others implementation or description. But this
comes from _my_ implementation.
-- 
        Thierry Laronde <tlaronde +AT+ polynum +dot+ com>
                     http://www.kergis.com/
                    http://kertex.kergis.com/
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