On 2/2/2025 12:52 PM, Udicoudco wrote:
Hello Hans,
On Sun, Feb 2, 2025 at 1:35 PM Hans Hagen <[email protected]> wrote:
This kind of behavior is not going to change .. adding / changing things
wrt luatex waS frozen for a reason so only real bugs get fixed.
Then why was it changed *after* LuaTeX was declared as frozen (LuaTeX 1.10)
for paragraphs not created by math displays?
well, 1.10 was kind of an official release where we decided that
this-is-it also because of pressure to freeze (before that we only had
sort of stable development snapshots for TL) but realy freezing happened
bit later with it now being deep-freeze
(It was you who changed it :)
indeed kind of a bug
To me, it seems like it was decided it is a bug...
and simply display math was not considered
at the time.
because displaymmath is used in various scenarios: as a pargaraph of its
own, inside a paragraph (where it is assumed to take 3 lines), in order
to catch a previous line width (kind of an abuse), etc
we also don't remove dir nodes from hboxes when there's only dirs (so
\ifvoid is seeing them)
>> Keep in mind that there a lot of
macro code around thta depends on the engine not changing.
This is why I suggested to add a new possible value to one of the
*mode primitives, if you think this is a breaking change (although
it was not done three years ago)
indeed something like that has to be under mode primitive control; for
an empty paragraph one can argue that the textdir is a side effect but
for a construct like display math it's a bit different, so maybe mode
control is indeed needed here (\mathemptydisplaymode) as we can't know
if it won't break something where it is assumed
so can you add a mode ? (i have no time for doing that now)
Hans
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Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
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