| /////////////////////////////////////////////////////////////////////////////// |
| // count.hpp |
| // |
| // Copyright 2005 Eric Niebler. Distributed under the Boost |
| // Software License, Version 1.0. (See accompanying file |
| // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| |
| #ifndef BOOST_ACCUMULATORS_STATISTICS_COUNT_HPP_EAN_28_10_2005 |
| #define BOOST_ACCUMULATORS_STATISTICS_COUNT_HPP_EAN_28_10_2005 |
| |
| #include <boost/mpl/always.hpp> |
| #include <boost/accumulators/framework/accumulator_base.hpp> |
| #include <boost/accumulators/framework/extractor.hpp> |
| #include <boost/accumulators/framework/depends_on.hpp> |
| #include <boost/accumulators/statistics_fwd.hpp> |
| |
| namespace boost { namespace accumulators |
| { |
| |
| namespace impl |
| { |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // count_impl |
| struct count_impl |
| : accumulator_base |
| { |
| // for boost::result_of |
| typedef std::size_t result_type; |
| |
| count_impl(dont_care) |
| : cnt(0) |
| { |
| } |
| |
| void operator ()(dont_care) |
| { |
| ++this->cnt; |
| } |
| |
| result_type result(dont_care) const |
| { |
| return this->cnt; |
| } |
| |
| private: |
| std::size_t cnt; |
| }; |
| |
| } // namespace impl |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // tag::count |
| // |
| namespace tag |
| { |
| struct count |
| : depends_on<> |
| { |
| /// INTERNAL ONLY |
| /// |
| typedef mpl::always<accumulators::impl::count_impl> impl; |
| }; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // extract::count |
| // |
| namespace extract |
| { |
| extractor<tag::count> const count = {}; |
| |
| BOOST_ACCUMULATORS_IGNORE_GLOBAL(count) |
| } |
| |
| using extract::count; |
| |
| }} // namespace boost::accumulators |
| |
| #endif |