/////////////////////////////////////////////////////////////////////////////// // rolling_sum.hpp // // Copyright 2008 Eric Niebler. Distributed under the Boost // Software License, Version 1.0. (See accompanying file // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) #ifndef BOOST_ACCUMULATORS_STATISTICS_ROLLING_SUM_HPP_EAN_26_12_2008 #define BOOST_ACCUMULATORS_STATISTICS_ROLLING_SUM_HPP_EAN_26_12_2008 #include <boost/mpl/placeholders.hpp> #include <boost/accumulators/framework/accumulator_base.hpp> #include <boost/accumulators/framework/extractor.hpp> #include <boost/accumulators/numeric/functional.hpp> #include <boost/accumulators/framework/parameters/sample.hpp> #include <boost/accumulators/framework/depends_on.hpp> #include <boost/accumulators/statistics_fwd.hpp> #include <boost/accumulators/statistics/rolling_window.hpp> namespace boost { namespace accumulators { namespace impl { /////////////////////////////////////////////////////////////////////////////// // rolling_sum_impl // returns the sum of the samples in the rolling window template<typename Sample> struct rolling_sum_impl : accumulator_base { typedef Sample result_type; template<typename Args> rolling_sum_impl(Args const &args) : sum_(args[sample | Sample()]) {} template<typename Args> void operator ()(Args const &args) { if(is_rolling_window_plus1_full(args)) { this->sum_ -= rolling_window_plus1(args).front(); } this->sum_ += args[sample]; } template<typename Args> result_type result(Args const & /*args*/) const { return this->sum_; } private: Sample sum_; }; } // namespace impl /////////////////////////////////////////////////////////////////////////////// // tag::rolling_sum // namespace tag { struct rolling_sum : depends_on< rolling_window_plus1 > { /// INTERNAL ONLY /// typedef accumulators::impl::rolling_sum_impl< mpl::_1 > impl; #ifdef BOOST_ACCUMULATORS_DOXYGEN_INVOKED /// tag::rolling_window::window_size named parameter static boost::parameter::keyword<tag::rolling_window_size> const window_size; #endif }; } // namespace tag /////////////////////////////////////////////////////////////////////////////// // extract::rolling_sum // namespace extract { extractor<tag::rolling_sum> const rolling_sum = {}; BOOST_ACCUMULATORS_IGNORE_GLOBAL(rolling_sum) } using extract::rolling_sum; }} // namespace boost::accumulators #endif