| /////////////////////////////////////////////////////////////////////////////// |
| // 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 |