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80 lines
1.8 KiB
80 lines
1.8 KiB
/////////////////////////////////////////////////////////////////////////////// |
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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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