Am 08.03.24 um 18:50 schrieb Pablo Rodriguez via ntg-context:
Dear list,
the following latest gets differents results when compiled with MkXL and
MkIV (in current latest from 2024.03.05 11:26):
\definefontfamily[mainface][rm][TeX Gyre Termes]
[features={default, quality},
it={style: regular, features:{default, quality, slanted}},
sl={style: regular, features:{default, quality, slanted}}]
\setupbodyfontenvironment
[default]
[em=italic]
\setupbodyfont[mainface]
\starttext
\startTEXpage[offset=1em]
a\\
\em b\\
\em c\\
\em d\\
\stopTEXpage
\stoptext
LMTX gets b, c and d in slanted form.
LuaTeX gets only b and c in slanted form.
With latest LMTX (2024.03.05), b and d are slanted, as I would expect.
This might be just a test case, but I’d avoid switches like \em without
grouping.
Hraban
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