request for combined accent

[yota moteuchi]

Hi,

since I didn't found them in Lilypond I thought it was a good idea to post there

I'm looking for the symbol representing some combined accents as shown
there http://www.dolmetsch.com/musictheory21.htm

up to now, the "legato & staccato" combined accent exist and have a
shortcut : a-_
but if you try to put a compound "normal & legato" : a \accent
\tenuto, it prints an ugly result.

could this be added to a next release ?

Thank you all

yota