On 4/30/2018 6:50 PM, Ulrike Fischer wrote:
In the following document the second a is much nearer placed to the
V:
\starttext
$V \mathbin{a} W \qquad V \mathbin{\mathbin{a}} W $
\stoptext
(in the second case an italic kern seems to be missing)
Can one avoid this side effect of nested \math-command? When
building symbols it is not always easy to avoid such nestings.
this is again a side effect of bad glyph boundingboxes
anyway, the tex engine collapses nested ord nodes so i generalized that
in the upcoming engine
\mathflattenmode \numexpr
0 % off
+ 1 % ord
+ 2 % bin
+ 4 % rel
+ 8 % punct
+ 16 % inner
\relax
so you can get rid of nested same-class (actually this is only done when
no super or subscript) .. as a side effect you get a sequence of math
char nodes and that will then listen to the other italics enforcing flag
(for fonts with weird character boundingboxes)
i didn't test side effects but at least we can influence it (the default
is of course 1 which is what tex naturally does)
Hans
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