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Editing: accumulators_fwd.hpp
/////////////////////////////////////////////////////////////////////////////// // accumulators_fwd.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_ACCUMULATORS_FWD_HPP_EAN_28_10_2005 #define BOOST_ACCUMULATORS_ACCUMULATORS_FWD_HPP_EAN_28_10_2005 #include <boost/config.hpp> #include <boost/core/enable_if.hpp> #include <boost/parameter/is_argument_pack.hpp> #include <boost/mpl/apply_fwd.hpp> // for mpl::na #include <boost/mpl/limits/vector.hpp> #include <boost/preprocessor/cat.hpp> #include <boost/preprocessor/arithmetic/inc.hpp> #include <boost/preprocessor/repetition/enum_params_with_a_default.hpp> #include <boost/preprocessor/repetition/enum_trailing_params.hpp> #include <boost/preprocessor/repetition/enum_trailing_binary_params.hpp> #include <boost/preprocessor/repetition/repeat_from_to.hpp> #include <boost/accumulators/numeric/functional_fwd.hpp> #ifndef BOOST_ACCUMULATORS_MAX_FEATURES /// The maximum number of accumulators that may be put in an accumulator_set. /// Defaults to BOOST_MPL_LIMIT_VECTOR_SIZE (which defaults to 20). # define BOOST_ACCUMULATORS_MAX_FEATURES BOOST_MPL_LIMIT_VECTOR_SIZE #endif #if BOOST_ACCUMULATORS_MAX_FEATURES > BOOST_MPL_LIMIT_VECTOR_SIZE # error BOOST_ACCUMULATORS_MAX_FEATURES cannot be larger than BOOST_MPL_LIMIT_VECTOR_SIZE #endif #ifndef BOOST_ACCUMULATORS_MAX_ARGS /// The maximum number of arguments that may be specified to an accumulator_set's /// accumulation function. Defaults to 15. # define BOOST_ACCUMULATORS_MAX_ARGS 15 #endif #if BOOST_WORKAROUND(__GNUC__, == 3) \ || BOOST_WORKAROUND(__EDG_VERSION__, BOOST_TESTED_AT(306)) # define BOOST_ACCUMULATORS_BROKEN_CONST_OVERLOADS #endif #ifdef BOOST_ACCUMULATORS_BROKEN_CONST_OVERLOADS # include <boost/type_traits/is_const.hpp> # define BOOST_ACCUMULATORS_PROTO_DISABLE_IF_IS_CONST(T)\ , typename boost::disable_if<boost::is_const<T> >::type * = 0 #else # define BOOST_ACCUMULATORS_PROTO_DISABLE_IF_IS_CONST(T) #endif #define BOOST_ACCUMULATORS_GCC_VERSION \ (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) namespace boost { namespace accumulators { /////////////////////////////////////////////////////////////////////////////// // Named parameters tags // namespace tag { struct sample; struct weight; struct accumulator; struct weights; } /////////////////////////////////////////////////////////////////////////////// // User-level features // namespace tag { template<typename ValueType, typename Tag> struct value; template<typename Tag> struct value_tag; template<typename Referent, typename Tag> struct reference; template<typename Tag> struct reference_tag; template<typename Type, typename Tag = void, typename AccumulatorSet = void> struct external; template<typename Feature> struct droppable; } template<typename Accumulator> struct droppable_accumulator_base; template<typename Accumulator> struct droppable_accumulator; template<typename Accumulator> struct with_cached_result; template<typename Sample, typename Features, typename Weight = void> struct accumulator_set; template<typename Feature> struct extractor; template<typename Feature> struct feature_of; template<typename Feature> struct as_feature; template<typename Feature> struct as_weighted_feature; template<BOOST_PP_ENUM_PARAMS_WITH_A_DEFAULT(BOOST_ACCUMULATORS_MAX_FEATURES, typename Feature, mpl::na)> struct depends_on; template<BOOST_PP_ENUM_PARAMS_WITH_A_DEFAULT(BOOST_ACCUMULATORS_MAX_FEATURES, typename Feature, mpl::na)> struct features; template<typename Feature, typename AccumulatorSet> typename mpl::apply<AccumulatorSet, Feature>::type const & find_accumulator(AccumulatorSet const &acc); template<typename Feature, typename AccumulatorSet> typename mpl::apply<AccumulatorSet, Feature>::type::result_type extract_result(AccumulatorSet const &acc); namespace detail { struct _enabler { }; } // ... other overloads generated by Boost.Preprocessor: /// INTERNAL ONLY /// #define BOOST_ACCUMULATORS_EXTRACT_RESULT_FWD(z, n, _) \ template< \ typename Feature \ , typename AccumulatorSet \ BOOST_PP_ENUM_TRAILING_PARAMS_Z(z, n, typename A) \ > \ typename mpl::apply<AccumulatorSet, Feature>::type::result_type \ extract_result( \ AccumulatorSet const &acc \ BOOST_PP_ENUM_TRAILING_BINARY_PARAMS_Z(z, n, A, const &a) \ , typename boost::enable_if< \ parameter::is_argument_pack<A0> \ , detail::_enabler \ >::type = detail::_enabler() \ ); \ template< \ typename Feature \ , typename AccumulatorSet \ BOOST_PP_ENUM_TRAILING_PARAMS_Z(z, n, typename A) \ > \ typename mpl::apply<AccumulatorSet, Feature>::type::result_type \ extract_result( \ AccumulatorSet const &acc \ BOOST_PP_ENUM_TRAILING_BINARY_PARAMS_Z(z, n, A, const &a) \ , typename boost::disable_if< \ parameter::is_argument_pack<A0> \ , detail::_enabler \ >::type = detail::_enabler() \ ); /// INTERNAL ONLY /// BOOST_PP_REPEAT_FROM_TO( 1 , BOOST_PP_INC(BOOST_ACCUMULATORS_MAX_ARGS) , BOOST_ACCUMULATORS_EXTRACT_RESULT_FWD , _ ) #undef BOOST_ACCUMULATORS_EXTRACT_RESULT_FWD #ifdef BOOST_ACCUMULATORS_DOXYGEN_INVOKED template<typename Feature, typename AccumulatorSet, typename A1, typename A2 ...> typename mpl::apply<AccumulatorSet, Feature>::type::result_type extract_result(AccumulatorSet const &acc, A1 const &a1, A2 const &a2 ...); #endif namespace impl { using namespace numeric::operators; template<typename Accumulator, typename Tag> struct external_impl; } namespace detail { template<typename Accumulator> struct feature_tag; template<typename Feature, typename Sample, typename Weight> struct to_accumulator; struct accumulator_set_base; template<typename T> struct is_accumulator_set; inline void ignore_variable(void const *) {} } }} // namespace boost::accumulators #define BOOST_ACCUMULATORS_IGNORE_GLOBAL(X) \ namespace detail \ { \ struct BOOST_PP_CAT(ignore_, X) \ { \ void ignore() \ { \ boost::accumulators::detail::ignore_variable(&X); \ } \ }; \ } \ /**/ #include <boost/parameter/nested_keyword.hpp> #endif // include guard
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