| 1 | /////////////////////////////////////////////////////////////////////////////// |
|---|---|
| 2 | // rolling_count.hpp |
| 3 | // |
| 4 | // Copyright 2008 Eric Niebler. Distributed under the Boost |
| 5 | // Software License, Version 1.0. (See accompanying file |
| 6 | // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| 7 | |
| 8 | #ifndef BOOST_ACCUMULATORS_STATISTICS_ROLLING_COUNT_HPP_EAN_26_12_2008 |
| 9 | #define BOOST_ACCUMULATORS_STATISTICS_ROLLING_COUNT_HPP_EAN_26_12_2008 |
| 10 | |
| 11 | #include <boost/mpl/placeholders.hpp> |
| 12 | #include <boost/accumulators/framework/accumulator_base.hpp> |
| 13 | #include <boost/accumulators/framework/extractor.hpp> |
| 14 | #include <boost/accumulators/numeric/functional.hpp> |
| 15 | #include <boost/accumulators/framework/parameters/sample.hpp> |
| 16 | #include <boost/accumulators/framework/depends_on.hpp> |
| 17 | #include <boost/accumulators/statistics_fwd.hpp> |
| 18 | #include <boost/accumulators/statistics/rolling_window.hpp> |
| 19 | |
| 20 | namespace boost { namespace accumulators |
| 21 | { |
| 22 | |
| 23 | namespace impl |
| 24 | { |
| 25 | |
| 26 | /////////////////////////////////////////////////////////////////////////////// |
| 27 | // rolling_count_impl |
| 28 | // returns the count of elements in the rolling window |
| 29 | template<typename Sample> |
| 30 | struct rolling_count_impl |
| 31 | : accumulator_base |
| 32 | { |
| 33 | typedef std::size_t result_type; |
| 34 | |
| 35 | rolling_count_impl(dont_care) |
| 36 | {} |
| 37 | |
| 38 | template<typename Args> |
| 39 | result_type result(Args const &args) const |
| 40 | { |
| 41 | return static_cast<std::size_t>(rolling_window_plus1(args).size()) - is_rolling_window_plus1_full(args); |
| 42 | } |
| 43 | |
| 44 | // serialization is done by accumulators it depends on |
| 45 | template<class Archive> |
| 46 | void serialize(Archive & ar, const unsigned int file_version) {} |
| 47 | }; |
| 48 | |
| 49 | } // namespace impl |
| 50 | |
| 51 | /////////////////////////////////////////////////////////////////////////////// |
| 52 | // tag::rolling_count |
| 53 | // |
| 54 | namespace tag |
| 55 | { |
| 56 | struct rolling_count |
| 57 | : depends_on< rolling_window_plus1 > |
| 58 | { |
| 59 | /// INTERNAL ONLY |
| 60 | /// |
| 61 | typedef accumulators::impl::rolling_count_impl< mpl::_1 > impl; |
| 62 | |
| 63 | #ifdef BOOST_ACCUMULATORS_DOXYGEN_INVOKED |
| 64 | /// tag::rolling_window::window_size named parameter |
| 65 | static boost::parameter::keyword<tag::rolling_window_size> const window_size; |
| 66 | #endif |
| 67 | }; |
| 68 | } // namespace tag |
| 69 | |
| 70 | /////////////////////////////////////////////////////////////////////////////// |
| 71 | // extract::rolling_count |
| 72 | // |
| 73 | namespace extract |
| 74 | { |
| 75 | extractor<tag::rolling_count> const rolling_count = {}; |
| 76 | |
| 77 | BOOST_ACCUMULATORS_IGNORE_GLOBAL(rolling_count) |
| 78 | } |
| 79 | |
| 80 | using extract::rolling_count; |
| 81 | |
| 82 | }} // namespace boost::accumulators |
| 83 | |
| 84 | #endif |
| 85 |