[XeTeX] Discretionary line-breaks in Tamil

[Taylor, P]

Ulrike Fischer wrote:


different code pathes in xetex - cmr10 is not handled by  harfbuzz.



Thank you, Ulrike — I never knew that.  New demonstration file follows :

% !TeX Program=XeTeX

\hsize = 1 mm

\def \doit #1%

     {%

         \leftline {#1}

         \hyphenchar \font = "200B

          a aa^^^^200baa

          a

          aaaa

         \par

}

\doit {Default font: cmr10}

\font \thisfont = "LMRoman10-Regular"

\thisfont

\doit {"LMRoman10-Regular"}

\font \thisfont = "BKM-cmr10"

\thisfont

\doit {"BKM-cmr10"}

\end
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