Added boost header
This commit is contained in:
Christophe Riccio
229
test/external/boost/accumulators/framework/extractor.hpp
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229
test/external/boost/accumulators/framework/extractor.hpp
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///////////////////////////////////////////////////////////////////////////////
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// extractor.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_FRAMEWORK_EXTRACTOR_HPP_EAN_28_10_2005
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#define BOOST_ACCUMULATORS_FRAMEWORK_EXTRACTOR_HPP_EAN_28_10_2005
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#include <boost/preprocessor/tuple/rem.hpp>
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#include <boost/preprocessor/array/size.hpp>
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#include <boost/preprocessor/array/data.hpp>
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#include <boost/preprocessor/array/elem.hpp>
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#include <boost/preprocessor/seq/to_array.hpp>
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#include <boost/preprocessor/seq/transform.hpp>
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#include <boost/preprocessor/repetition/enum_params.hpp>
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#include <boost/preprocessor/repetition/enum_trailing_params.hpp>
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#include <boost/preprocessor/repetition/enum_trailing_binary_params.hpp>
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#include <boost/parameter/binding.hpp>
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#include <boost/mpl/apply.hpp>
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#include <boost/mpl/eval_if.hpp>
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#include <boost/type_traits/remove_reference.hpp>
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#include <boost/accumulators/accumulators_fwd.hpp>
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#include <boost/accumulators/framework/parameters/accumulator.hpp>
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namespace boost { namespace accumulators
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{
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namespace detail
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{
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template<typename AccumulatorSet, typename Feature>
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struct accumulator_set_result
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{
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typedef typename as_feature<Feature>::type feature_type;
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typedef typename mpl::apply<AccumulatorSet, feature_type>::type::result_type type;
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};
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template<typename Args, typename Feature>
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struct argument_pack_result
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: accumulator_set_result<
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typename remove_reference<
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typename parameter::binding<Args, tag::accumulator>::type
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>::type
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, Feature
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>
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{
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};
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template<typename A, typename Feature>
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struct extractor_result
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: mpl::eval_if<
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detail::is_accumulator_set<A>
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, accumulator_set_result<A, Feature>
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, argument_pack_result<A, Feature>
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>
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{
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};
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template<typename Feature, typename AccumulatorSet>
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typename extractor_result<AccumulatorSet, Feature>::type
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do_extract(AccumulatorSet const &acc, mpl::true_)
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{
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typedef typename as_feature<Feature>::type feature_type;
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return extract_result<feature_type>(acc);
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}
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template<typename Feature, typename Args>
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typename extractor_result<Args, Feature>::type
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do_extract(Args const &args, mpl::false_)
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{
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typedef typename as_feature<Feature>::type feature_type;
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return find_accumulator<feature_type>(args[accumulator]).result(args);
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}
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} // namespace detail
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///////////////////////////////////////////////////////////////////////////////
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/// Extracts the result associated with Feature from the specified accumulator_set.
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template<typename Feature>
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struct extractor
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{
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typedef extractor<Feature> this_type;
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/// The result meta-function for determining the return type of the extractor
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template<typename F>
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struct result;
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template<typename A1>
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struct result<this_type(A1)>
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: detail::extractor_result<A1, Feature>
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{
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};
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/// Extract the result associated with Feature from the accumulator set
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/// \param acc The accumulator set object from which to extract the result
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template<typename Arg1>
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typename detail::extractor_result<Arg1, Feature>::type
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operator ()(Arg1 const &arg1) const
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{
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// Arg1 could be an accumulator_set or an argument pack containing
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// an accumulator_set. Dispatch accordingly.
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return detail::do_extract<Feature>(arg1, detail::is_accumulator_set<Arg1>());
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}
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/// \overload
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///
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/// \param a1 Optional named parameter to be passed to the accumulator's result() function.
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template<typename AccumulatorSet, typename A1>
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typename detail::extractor_result<AccumulatorSet, Feature>::type
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operator ()(AccumulatorSet const &acc, A1 const &a1) const
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{
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BOOST_MPL_ASSERT((detail::is_accumulator_set<AccumulatorSet>));
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typedef typename as_feature<Feature>::type feature_type;
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return extract_result<feature_type>(acc, a1);
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}
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// ... other overloads generated by Boost.Preprocessor:
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/// INTERNAL ONLY
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///
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#define BOOST_ACCUMULATORS_EXTRACTOR_FUN_OP(z, n, _) \
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template<BOOST_PP_ENUM_PARAMS_Z(z, n, typename A)> \
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struct result<this_type(BOOST_PP_ENUM_PARAMS_Z(z, n, A))> \
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: detail::extractor_result<A1, Feature> \
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{}; \
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template< \
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typename AccumulatorSet \
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BOOST_PP_ENUM_TRAILING_PARAMS_Z(z, n, typename A) \
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> \
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typename detail::extractor_result<AccumulatorSet, Feature>::type \
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operator ()( \
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AccumulatorSet const &acc \
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BOOST_PP_ENUM_TRAILING_BINARY_PARAMS_Z(z, n, A, const &a) \
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) const \
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{ \
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BOOST_MPL_ASSERT((detail::is_accumulator_set<AccumulatorSet>)); \
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typedef typename as_feature<Feature>::type feature_type; \
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return extract_result<feature_type>(acc BOOST_PP_ENUM_TRAILING_PARAMS_Z(z, n, a));\
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}
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BOOST_PP_REPEAT_FROM_TO(
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2
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, BOOST_PP_INC(BOOST_ACCUMULATORS_MAX_ARGS)
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, BOOST_ACCUMULATORS_EXTRACTOR_FUN_OP
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, _
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)
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#ifdef BOOST_ACCUMULATORS_DOXYGEN_INVOKED
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/// \overload
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///
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template<typename AccumulatorSet, typename A1, typename A2, ...>
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typename detail::extractor_result<AccumulatorSet, Feature>::type
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operator ()(AccumulatorSet const &acc, A1 const &a1, A2 const &a2, ...);
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#endif
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};
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/// INTERNAL ONLY
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///
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#define BOOST_ACCUMULATORS_ARRAY_REM(Array) \
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BOOST_PP_TUPLE_REM_CTOR(BOOST_PP_ARRAY_SIZE(Array), BOOST_PP_ARRAY_DATA(Array))
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/// INTERNAL ONLY
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///
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#define BOOST_ACCUMULATORS_SEQ_REM(Seq) \
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BOOST_ACCUMULATORS_ARRAY_REM(BOOST_PP_SEQ_TO_ARRAY(Seq))
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/// INTERNAL ONLY
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///
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#define BOOST_ACCUMULATORS_ARGS_OP(s, data, elem) \
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T ## s
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/// INTERNAL ONLY
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///
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#define BOOST_ACCUMULATORS_PARAMS_OP(s, data, elem) \
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elem T ## s
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/// INTERNAL ONLY
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///
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#define BOOST_ACCUMULATORS_MAKE_FEATURE(Tag, Feature, ParamsSeq) \
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Tag::Feature< \
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BOOST_ACCUMULATORS_SEQ_REM( \
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BOOST_PP_SEQ_TRANSFORM(BOOST_ACCUMULATORS_ARGS_OP, ~, ParamsSeq) \
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) \
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>
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/// INTERNAL ONLY
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///
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#define BOOST_ACCUMULATORS_DEFINE_EXTRACTOR_FUN_IMPL(z, n, Tag, Feature, ParamsSeq) \
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template< \
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BOOST_ACCUMULATORS_SEQ_REM( \
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BOOST_PP_SEQ_TRANSFORM(BOOST_ACCUMULATORS_PARAMS_OP, ~, ParamsSeq) \
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) \
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, typename Arg1 \
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BOOST_PP_ENUM_TRAILING_PARAMS_Z(z, n, typename A) \
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> \
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typename boost::accumulators::detail::extractor_result< \
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Arg1 \
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, BOOST_ACCUMULATORS_MAKE_FEATURE(Tag, Feature, ParamsSeq) \
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>::type \
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Feature(Arg1 const &arg1 BOOST_PP_ENUM_TRAILING_BINARY_PARAMS_Z(z, n, A, const &a) ) \
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{ \
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typedef BOOST_ACCUMULATORS_MAKE_FEATURE(Tag, Feature, ParamsSeq) feature_type; \
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return boost::accumulators::extractor<feature_type>()( \
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arg1 BOOST_PP_ENUM_TRAILING_PARAMS_Z(z, n, a)); \
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}
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/// INTERNAL ONLY
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///
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#define BOOST_ACCUMULATORS_DEFINE_EXTRACTOR_FUN(z, n, _) \
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BOOST_ACCUMULATORS_DEFINE_EXTRACTOR_FUN_IMPL( \
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z \
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, n \
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, BOOST_PP_ARRAY_ELEM(0, _) \
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, BOOST_PP_ARRAY_ELEM(1, _) \
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, BOOST_PP_ARRAY_ELEM(2, _) \
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)
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#define BOOST_ACCUMULATORS_DEFINE_EXTRACTOR(Tag, Feature, ParamSeq) \
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BOOST_PP_REPEAT( \
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BOOST_PP_INC(BOOST_ACCUMULATORS_MAX_ARGS) \
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, BOOST_ACCUMULATORS_DEFINE_EXTRACTOR_FUN \
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, (3, (Tag, Feature, ParamSeq)) \
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)
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}} // namespace boost::accumulators
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#endif
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