On Tue, Apr 26, 2022 at 10:04 AM luigi scarso wrote:

On Tue, Apr 26, 2022 at 8:59 AM Henri Menke wrote:

...

On Mon, 2022-04-25 at 22:09 +0200, Henri Menke wrote:

...

Dear devs,

When using delimiter with \left...\right the italic correction between the preceding letter and the delimiter is dropped. I've tried this with a few fonts and all show the problem. For Libertinus Math the glyphs even overlap.

MWE for mtxrun --script plain (TeX Live 2022)

%\input luaotfload.sty \font\mathfont="file:LibertinusMath- Regular.otf:mode=base;script=math" at 10pt \textfont0=\mathfont \textfont2=\mathfont

\Umathcodenum`f="1D453 \protected\def\langle{\Udelimiter"4"0"27E8\relax} \protected\def\rangle{\Udelimiter"5"0"27E9\relax}

$f\rangle$

\nulldelimiterspace=0pt $\left.f\right\rangle$

\bye

Ulrike pointed out \mathitalicsmode=1 on TeX Stack Exchange, but there is still an issue with sub_mlists:

%\input luaotfload.sty \font\mathfont="file:LibertinusMath-Regular.otf:mode=base;script=math" at 10pt \textfont0=\mathfont \textfont2=\mathfont

\Umathcodenum`f="1D453 \protected\def\langle{\Udelimiter"4"0"27E8\relax} \protected\def\rangle{\Udelimiter"5"0"27E9\relax}

\mathitalicsmode=1

$f\rangle$

\nulldelimiterspace=0pt $\left.f\right\rangle$

${-f}\rangle$

$\left.{-f}\right\rangle$

\bye

I will check it, but have you already seen mlist.c ?

-- luigi

Hans has enabled \mathitalicsmode=2. Committed revision 7525. -- luigi