81 lines
1.9 KiB
C++
81 lines
1.9 KiB
C++
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///////////////////////////////////////////////////////////////////////////////
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// count.hpp
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//
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// Copyright 2005 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_COUNT_HPP_EAN_28_10_2005
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#define BOOST_ACCUMULATORS_STATISTICS_COUNT_HPP_EAN_28_10_2005
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#include <boost/mpl/always.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/framework/depends_on.hpp>
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#include <boost/accumulators/statistics_fwd.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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// count_impl
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struct count_impl
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: accumulator_base
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{
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// for boost::result_of
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typedef std::size_t result_type;
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count_impl(dont_care)
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: cnt(0)
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{
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}
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void operator ()(dont_care)
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{
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++this->cnt;
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}
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result_type result(dont_care) const
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{
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return this->cnt;
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}
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private:
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std::size_t cnt;
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};
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} // namespace impl
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///////////////////////////////////////////////////////////////////////////////
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// tag::count
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//
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namespace tag
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{
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struct count
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: depends_on<>
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{
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/// INTERNAL ONLY
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///
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typedef mpl::always<accumulators::impl::count_impl> impl;
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};
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}
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///////////////////////////////////////////////////////////////////////////////
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// extract::count
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//
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namespace extract
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{
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extractor<tag::count> const count = {};
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BOOST_ACCUMULATORS_IGNORE_GLOBAL(count)
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}
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using extract::count;
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}} // namespace boost::accumulators
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#endif
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