| /////////////////////////////////////////////////////////////////////////////// |
| // error_of.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_ERROR_OF_HPP_EAN_29_11_2005 |
| #define BOOST_ACCUMULATORS_STATISTICS_ERROR_OF_HPP_EAN_29_11_2005 |
| |
| #include <boost/mpl/placeholders.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 |
| { |
| /// INTERNAL ONLY |
| /// |
| template<typename Feature> |
| struct this_feature_has_no_error_calculation |
| : mpl::false_ |
| { |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // error_of_impl |
| /// INTERNAL ONLY |
| /// |
| template<typename Sample, typename Feature> |
| struct error_of_impl |
| : accumulator_base |
| { |
| // TODO: specialize this on the specific features that have errors we're |
| // interested in. |
| BOOST_MPL_ASSERT((this_feature_has_no_error_calculation<Feature>)); |
| |
| // for boost::result_of |
| typedef int result_type; |
| |
| error_of_impl(dont_care) |
| { |
| } |
| |
| result_type result(dont_care) const |
| { |
| return 0; |
| } |
| }; |
| |
| } // namespace impl |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // tag::error_of |
| // |
| namespace tag |
| { |
| template<typename Feature> |
| struct error_of |
| : depends_on<Feature> |
| { |
| /// INTERNAL ONLY |
| /// |
| typedef accumulators::impl::error_of_impl<mpl::_1, Feature> impl; |
| }; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // extract::error_of |
| // |
| namespace extract |
| { |
| BOOST_ACCUMULATORS_DEFINE_EXTRACTOR(tag, error_of, (typename)) |
| } |
| |
| using extract::error_of; |
| |
| // make tag::error_of<tag::feature(modifier)> work |
| template<typename Feature> |
| struct as_feature<tag::error_of<Feature> > |
| { |
| typedef tag::error_of<typename as_feature<Feature>::type> type; |
| }; |
| |
| // make error_of<tag::mean> work with non-void weights (should become |
| // error_of<tag::weighted_mean> |
| template<typename Feature> |
| struct as_weighted_feature<tag::error_of<Feature> > |
| { |
| typedef tag::error_of<typename as_weighted_feature<Feature>::type> type; |
| }; |
| |
| }} // namespace boost::accumulators |
| |
| #endif |