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