On 2019-12-21 6:27 AM, Shriramana Sharma via Unicode wrote:
However, even the simplest Vedic sequence (not involving Sama Vedic or
multiple tone marker combinations) like दे॒वेभ्य॑ः throws up a dotted
circle, and one is expected (see developer feedback in that bug
report) to input the visarga before tone markers, hoping the software
is intelligent enough to skip over the visarga (or anusvara) place the
tone marker over the preceding syllable correctly. Why it is necessary
to put the visarga first in input only to have to skip over it in
shaping is beyond me.
य॔ यॆ॔
य॔ः -- visarga last
यॆ॔ः -- "
यः॔ -- visarga before accent (U+0954)
यॆः॔ -- "
य॑ यॆ॑
य॑ः -- visarga last
यॆ॑ः -- "
यः॑ ---- visarga before svarita (U+0951)
यॆः॑ ---- "
U+0951 and U+0954 have canonical combining class of 230. Putting
VISARGA (CCC=0) after those CCC=230 marks generates the dotted circle
for VISARGA. Putting VISARGA before those CCC=230 marks generates the
dotted circle for U+0954 but drops the dotted circle for U+0951. In
both cases where VISARGA comes before, the mark positioning is broken.
(Mangal font, Win 7)
As far as I can tell, the simplest solution would be for the Indic
shaping engines to suppress the dotted circle for VISARGA (or ANUSVARA)
where appropriate. Entering/storing VISARGA or ANUSVARA at the end of
the syllable makes sense since that's where it goes, visually and logically.
