boost::compute::accumulate
// In header: <boost/compute/algorithm/accumulate.hpp> template<typename InputIterator, typename T, typename BinaryFunction> T accumulate(InputIterator first, InputIterator last, T init, BinaryFunction function, command_queue & queue = system::default_queue()); template<typename InputIterator, typename T> T accumulate(InputIterator first, InputIterator last, T init, command_queue & queue = system::default_queue());