\lccode1=13
\lowercase{\def\sk@pf@nt\preloaded=#1^^A{\endgroup}}
I suspect that the global setting here is not intended, it's just used to
generate a token for the following definition.
On Sun, 23 Mar 2025 at 15:10, David Carlisle <d.p.carli...@gmail.com> wrote:
>
>
> On Sun, 23 Mar 2025 at 14:16, Martin Ruckert <martin.ruck...@hm.edu>
> wrote:
>
>> Hi all!
>>
>> I am currently working on moving the hitex engine to utf8,
>> and I discovered that there are some small differences between
>> luatex and xetex (see below). Are these differences on purpose
>> or is there a bug somewhere?
>>
>> Best regards
>> Martin
>>
>>
>> There are differences between xetex and luatex for these five codepoints:
>>
>> codepoint 1:
>> xetex \lccode=13
>> luatex \lccode=0
>>
>
> You haven't said how you are looking. The values set by the engines don't
> really matter much as any format is likely to reset them.
>
> for character 1, in the engine both xetex and luatex set the lccode to 0
>
> $ luatex --ini \\showthe\\lccode1
> This is LuaTeX, Version 1.22.0 (TeX Live 2025) (INITEX)
> restricted system commands enabled.
> > 0.
>
> $ xetex --ini \\showthe\\lccode1
> This is XeTeX, Version 3.141592653-2.6-0.999997 (TeX Live 2025) (INITEX)
> restricted \write18 enabled.
> > 0.
>
> In plain TeX, xetex is setting it to 13
>
> $ luatex \\showthe\\lccode1
> This is LuaTeX, Version 1.22.0 (TeX Live 2025)
> restricted system commands enabled.
> > 0.
>
> $ xetex \\showthe\\lccode1
> This is XeTeX, Version 3.141592653-2.6-0.999997 (TeX Live 2025) (preloaded
> format=xetex)
> restricted \write18 enabled.
> entering extended mode
> > 13.
>
>
> and latex it is set to 0 in both
>
> $ lualatex \\showthe\\lccode1
> This is LuaHBTeX, Version 1.22.0 (TeX Live 2025)
> restricted system commands enabled.
> LaTeX2e <2024-11-01> patch level 2
> L3 programming layer <2025-01-18>
> > 0.
>
> $ xelatex \\showthe\\lccode1
> This is XeTeX, Version 3.141592653-2.6-0.999997 (TeX Live 2025) (preloaded
> format=xelatex)
> restricted \write18 enabled.
> entering extended mode
> LaTeX2e <2024-11-01> patch level 2
> L3 programming layer <2025-01-18>
> > 0.
>
>
> so the only slightly anomalous setting is plain xetex where it is active
> but let to the subscript character rather than having that catcode directly
>
> Line 56 of tex-ini-files/xetex.ini is
>
> \lccode1=13
>
> David
>
>
>
>
