beaming with rests

[Peter Dobratz]

Hi,
I have searched through the documentation and mailing lists and have not been 
able to find a solution to my particular beaming problem.  I have something 
like the following:

[ d8 r16 e16 ]

Without the brackets, this produces no beams (which is expected), but with the 
brackets, the double beam extends over the rest.  I want this double beam to 
stop before the rest.  The beaming documentation suggests 
Voice.stemLeftBeamCount or Voice.stemRightBeamCount, but changing these 
properties in this case only determines whether or not the double beam exists 
or not.  Looking at the Beam grob properties it seems like I want to override 
the flag-width-function, but I don't know enough about lilypond internals to 
know the proper syntax for such a function.

I am using Lilypond 1.4.2 for Debian potato.

--Peter