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Message-ID:  <ZMPbRbBvKEsaL3xW@polynum.com>
Date:         Fri, 28 Jul 2023 17:14:13 +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:  <42b1c81a-269e-6e92-61ae-81309d2f59f0@morningstar2.co.uk>
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Status: R

On Fri, Jul 28, 2023 at 03:58:49PM +0100, Joseph Wright wrote:
> On 28/07/2023 15:28,  Thierry wrote:
> > Yes. But the same engine does things differently between LaTeX
> > 2022-11-01 and LaTeX 2023-06-01.
> > 
> > So could someone give me the diff of the input related things in
> > LaTeX between these two versions so that I can have a clue about
> > what LaTeX is expecting and what it is eventually calling (because it
> > could be calling, low level, the open routine, and there is no
> > acrobatics made in the open routine in kerTeX: the handling is made
> > before calling the routine; so if LaTeX is calling low level like
> > this, the result is not a surprise).
> 
> Older LaTeX used \openin + \ifeof to test for file existence; we now use
> \(pdf)filesize, which is expandable and reports "0" for a non-existent file.
> Both methods should find "foo.tex" from "foo" in the same way.
> 

Uh! You expect \filesize to do searching and file extension? Why?
\filesize can be called with whatever file, not necessarily a .tex.
Why would it assume it has to try an extension if it is not found?

Where was this specified for the primitive?
-- 
        Thierry Laronde <tlaronde +AT+ polynum +dot+ com>
                     http://www.kergis.com/
                    http://kertex.kergis.com/
Key fingerprint = 0FF7 E906 FBAF FE95 FD89  250D 52B1 AE95 6006 F40C