[Boost-users] [fusion] conversion from map *values* to vector

I have a general fusion map for example map< pair<p, double> , pair<q, double> > if I use as_vector I get vector<pair<p, double> , pair<q, double> > is there a function that given the map converts it into vector<double, double> i.e. gives a vector with only the values of the key and not the keys/ value pair? Thank you, Alfredo