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Message-ID:  <49bed38b-b4ab-2c62-248e-a8b14f9309ce@wanadoo.fr>
Date:         Fri, 28 Jul 2023 16:45:04 +0200
Reply-To:     Mailing list for the LaTeX3 project
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From:         =?UTF-8?Q?Jean-C=c3=b4me_Charpentier?=
              <jean-come.charpentier@WANADOO.FR>
Subject: Re: "new" \input vs. primitive behavior
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Status: R

Le 28/07/2023 à 16:28, LARONDE Thierry a écrit :
>[...]
> 
> 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).

I prefere meld :-)

TeXLive2019:
------------
\def\input{\@ifnextchar\bgroup\@iinput\@@input}
\def\@iinput#1{%
   \InputIfFileExists{#1}{}%
   {\filename@parse\@curr@file
    \edef\reserved@a{\noexpand\@missingfileerror
      {\filename@area\filename@base}%
      {\ifx\filename@ext\relax tex\else\filename@ext\fi}}%
    \reserved@a}}

TeXLive2022:
------------
\def\input{\@ifnextchar\bgroup\@iinput\@@input}
\def\@iinput#1{%
   \InputIfFileExists{#1}{}%
   {\filename@parse\@curr@file
    \edef\reserved@a{\noexpand\@missingfileerror
      {\filename@area\filename@base}%
      {\ifx\filename@ext\relax tex\else\filename@ext\fi}}%
    \reserved@a
    \edef\reserved@a{\noexpand\@iinput{%
      \@missingfile@area\@missingfile@base.\@missingfile@ext}}%
    \reserved@a}}


I didn't see any other difference.

   Jean-Côme Charpentier