On 6/12/2020 4:35 AM, Jairo A. del Rio wrote:
It's actually nice to find those bugs when one makes heavy use of math
environments. For comparison, LuaTeX prints the correct output.
Well, thanks for finding them! Normnally those bugs are easy to fix.
Concerning math, there are no real fundamental changes under the hood,
but in the process of adding some more control there can be side
effects. For instance:
-- In order to make a bit nicer token interface (from the lua end) there
has been a bit more abstraction and some internal quantities sit in
better defined slots with zero based indices not, but in order to do
that I need to adapt some references and might overlook some ... no big
deal as there are not that many.
-- Some math rendering is quite hard codes wrt style and already much
has been made configurable (either controlled by keywords or by
additional parameters, think of \mathfoomode like ones). But it's easy
to overlook something there. This is why user testing helps.
-- Some new features (like prescripts that are handy for proper
chemistry as well as (i still have to adapt some code) mathml) but those
will go unnoticed / not impact regular math.
-- New (often already old by now) trickery like local math parameters,
which at some point wil be better interfaced.
-- Actually plenty more is possible but not yet used / done. It will
happen when I run into the code / have a reason, but the mechanisms are
there.
In general, not all that is there is yet used. I often do that stepwise
(just try it out someplace), also because sometimes we need to split
mkiv and lmtx sources then. Stepwise changes are easier because all kind
of things can interfere.
Wrt non-math i.e. general new features in the engine, these can for
instance involve more robust macro coding, full expansion, less horrific
tracing, future possibilities.
Users are welcome to suggest additional low level context macros that
they're missing. We're also wondering if some low level macros can go
away or maybe some 'raw' ones can be aliased to regular ones as
performance issues matter less nowadays.
There are for instance a few new tricks with macros but I'm not sure how
many users really define there own, and if so they never asked for those
specific things.
I'm anyway more or less through my list of engine related todo's (that
accumulated over years).
All that said, I really appreciate the patience that users have with
testing,
Hans
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Hans Hagen | PRAGMA ADE
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