| /////////////////////////////////////////////////////////////////////////////// |
| // rolling_count.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_COUNT_HPP_EAN_26_12_2008 |
| #define BOOST_ACCUMULATORS_STATISTICS_ROLLING_COUNT_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_count_impl |
| // returns the count of elements in the rolling window |
| template<typename Sample> |
| struct rolling_count_impl |
| : accumulator_base |
| { |
| typedef std::size_t result_type; |
| |
| rolling_count_impl(dont_care) |
| {} |
| |
| template<typename Args> |
| result_type result(Args const &args) const |
| { |
| return static_cast<std::size_t>(rolling_window_plus1(args).size()) - is_rolling_window_plus1_full(args); |
| } |
| }; |
| |
| } // namespace impl |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // tag::rolling_count |
| // |
| namespace tag |
| { |
| struct rolling_count |
| : depends_on< rolling_window_plus1 > |
| { |
| /// INTERNAL ONLY |
| /// |
| typedef accumulators::impl::rolling_count_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_count |
| // |
| namespace extract |
| { |
| extractor<tag::rolling_count> const rolling_count = {}; |
| |
| BOOST_ACCUMULATORS_IGNORE_GLOBAL(rolling_count) |
| } |
| |
| using extract::rolling_count; |
| |
| }} // namespace boost::accumulators |
| |
| #endif |