1 ///////////////////////////////////////////////////////////////////////////////
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)
8 #ifndef BOOST_ACCUMULATORS_STATISTICS_ROLLING_SUM_HPP_EAN_26_12_2008
9 #define BOOST_ACCUMULATORS_STATISTICS_ROLLING_SUM_HPP_EAN_26_12_2008
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>
20 namespace boost { namespace accumulators
24 ///////////////////////////////////////////////////////////////////////////////
26 // returns the sum of the samples in the rolling window
27 template<typename Sample>
28 struct rolling_sum_impl
31 typedef Sample result_type;
33 template<typename Args>
34 rolling_sum_impl(Args const &args)
35 : sum_(args[sample | Sample()])
38 template<typename Args>
39 void operator ()(Args const &args)
41 if(is_rolling_window_plus1_full(args))
43 this->sum_ -= rolling_window_plus1(args).front();
45 this->sum_ += args[sample];
48 template<typename Args>
49 result_type result(Args const & /*args*/) const
59 ///////////////////////////////////////////////////////////////////////////////
65 : depends_on< rolling_window_plus1 >
69 typedef accumulators::impl::rolling_sum_impl< mpl::_1 > impl;
71 #ifdef BOOST_ACCUMULATORS_DOXYGEN_INVOKED
72 /// tag::rolling_window::window_size named parameter
73 static boost::parameter::keyword<tag::rolling_window_size> const window_size;
78 ///////////////////////////////////////////////////////////////////////////////
79 // extract::rolling_sum
83 extractor<tag::rolling_sum> const rolling_sum = {};
85 BOOST_ACCUMULATORS_IGNORE_GLOBAL(rolling_sum)
88 using extract::rolling_sum;
89 }} // namespace boost::accumulators