How can I create a list of list of C++ predicate

Hello everybody

I have a problem, I created a C++ predicate and I would like to return
a list of list like this one [[],[1,2,3],[8,6,4]]. I know how to
create a single list, but I don't know how I could create this kind of
list.

Thanks for your help.

-- 
Ludovic Picouays