// In header: <boost/accumulators/statistics/weighted_density.hpp>

struct weighted_density : public boost::accumulators::depends_on< count, sum_of_weights, min, max >,
                          public density_cache_size,
                          public density_num_bins
{
  // public data members
  static boost::parameter::keyword< density_cache_size > const cache_size;
  static boost::parameter::keyword< density_num_bins > const num_bins;
};