On 11/15/2017 7:32 PM, Hans Hagen wrote:
On 11/15/2017 6:44 PM, David Carlisle wrote:
Hans wrote
sure but then, using an empty \mathrel{} in there is kind of bad
It's possibly the only way in classic etex to define a version of
\middle that gives \mathrel space
\def\relmiddle#1{\mathrel{}\middle#1\mathrel{}} ... \rmiddle | ...
acts like a relation with respect to automatic muskips on both sides
.. better add some explicit muskip then
you can't classically detect what \muskip needs adding unfortunately...
so \Umiddle is (of course:-) a whole lot better (apart from the
confusing numbering scheme:-) but
the \mathrel{}\middle|\mathrel{} idiom is likely to be quite common in
legacy documents moving to luatex
i will have a look at remapping these extended classes (after all we
don't have more spacing parameters)
the next version will use the normal class numbers
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