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annotate DEPENDENCIES/generic/include/boost/accumulators/framework/extractor.hpp @ 133:4acb5d8d80b6 tip

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Don't fail environmental check if README.md exists (but .txt and no-suffix don't)
author Chris Cannam
date Tue, 30 Jul 2019 12:25:44 +0100
parents 2665513ce2d3
children
rev   line source
Chris@16 1 ///////////////////////////////////////////////////////////////////////////////
Chris@16 2 // extractor.hpp
Chris@16 3 //
Chris@16 4 // Copyright 2005 Eric Niebler. Distributed under the Boost
Chris@16 5 // Software License, Version 1.0. (See accompanying file
Chris@16 6 // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16 7
Chris@16 8 #ifndef BOOST_ACCUMULATORS_FRAMEWORK_EXTRACTOR_HPP_EAN_28_10_2005
Chris@16 9 #define BOOST_ACCUMULATORS_FRAMEWORK_EXTRACTOR_HPP_EAN_28_10_2005
Chris@16 10
Chris@16 11 #include <boost/preprocessor/tuple/rem.hpp>
Chris@16 12 #include <boost/preprocessor/array/size.hpp>
Chris@16 13 #include <boost/preprocessor/array/data.hpp>
Chris@16 14 #include <boost/preprocessor/array/elem.hpp>
Chris@16 15 #include <boost/preprocessor/seq/to_array.hpp>
Chris@16 16 #include <boost/preprocessor/seq/transform.hpp>
Chris@16 17 #include <boost/preprocessor/repetition/enum_params.hpp>
Chris@16 18 #include <boost/preprocessor/repetition/enum_trailing_params.hpp>
Chris@16 19 #include <boost/preprocessor/repetition/enum_trailing_binary_params.hpp>
Chris@16 20 #include <boost/parameter/binding.hpp>
Chris@16 21 #include <boost/mpl/apply.hpp>
Chris@16 22 #include <boost/mpl/eval_if.hpp>
Chris@16 23 #include <boost/type_traits/remove_reference.hpp>
Chris@16 24 #include <boost/accumulators/accumulators_fwd.hpp>
Chris@16 25 #include <boost/accumulators/framework/parameters/accumulator.hpp>
Chris@16 26
Chris@16 27 namespace boost { namespace accumulators
Chris@16 28 {
Chris@16 29
Chris@16 30 namespace detail
Chris@16 31 {
Chris@16 32 template<typename AccumulatorSet, typename Feature>
Chris@16 33 struct accumulator_set_result
Chris@16 34 {
Chris@16 35 typedef typename as_feature<Feature>::type feature_type;
Chris@16 36 typedef typename mpl::apply<AccumulatorSet, feature_type>::type::result_type type;
Chris@16 37 };
Chris@16 38
Chris@16 39 template<typename Args, typename Feature>
Chris@16 40 struct argument_pack_result
Chris@16 41 : accumulator_set_result<
Chris@16 42 typename remove_reference<
Chris@16 43 typename parameter::binding<Args, tag::accumulator>::type
Chris@16 44 >::type
Chris@16 45 , Feature
Chris@16 46 >
Chris@16 47 {
Chris@16 48 };
Chris@16 49
Chris@16 50 template<typename A, typename Feature>
Chris@16 51 struct extractor_result
Chris@16 52 : mpl::eval_if<
Chris@16 53 detail::is_accumulator_set<A>
Chris@16 54 , accumulator_set_result<A, Feature>
Chris@16 55 , argument_pack_result<A, Feature>
Chris@16 56 >
Chris@16 57 {
Chris@16 58 };
Chris@16 59
Chris@16 60 template<typename Feature, typename AccumulatorSet>
Chris@16 61 typename extractor_result<AccumulatorSet, Feature>::type
Chris@16 62 do_extract(AccumulatorSet const &acc, mpl::true_)
Chris@16 63 {
Chris@16 64 typedef typename as_feature<Feature>::type feature_type;
Chris@16 65 return extract_result<feature_type>(acc);
Chris@16 66 }
Chris@16 67
Chris@16 68 template<typename Feature, typename Args>
Chris@16 69 typename extractor_result<Args, Feature>::type
Chris@16 70 do_extract(Args const &args, mpl::false_)
Chris@16 71 {
Chris@16 72 typedef typename as_feature<Feature>::type feature_type;
Chris@16 73 return find_accumulator<feature_type>(args[accumulator]).result(args);
Chris@16 74 }
Chris@16 75
Chris@16 76 } // namespace detail
Chris@16 77
Chris@16 78
Chris@16 79 ///////////////////////////////////////////////////////////////////////////////
Chris@16 80 /// Extracts the result associated with Feature from the specified accumulator_set.
Chris@16 81 template<typename Feature>
Chris@16 82 struct extractor
Chris@16 83 {
Chris@16 84 typedef extractor<Feature> this_type;
Chris@16 85
Chris@16 86 /// The result meta-function for determining the return type of the extractor
Chris@16 87 template<typename F>
Chris@16 88 struct result;
Chris@16 89
Chris@16 90 template<typename A1>
Chris@16 91 struct result<this_type(A1)>
Chris@16 92 : detail::extractor_result<A1, Feature>
Chris@16 93 {
Chris@16 94 };
Chris@16 95
Chris@16 96 /// Extract the result associated with Feature from the accumulator set
Chris@16 97 /// \param acc The accumulator set object from which to extract the result
Chris@16 98 template<typename Arg1>
Chris@16 99 typename detail::extractor_result<Arg1, Feature>::type
Chris@16 100 operator ()(Arg1 const &arg1) const
Chris@16 101 {
Chris@16 102 // Arg1 could be an accumulator_set or an argument pack containing
Chris@16 103 // an accumulator_set. Dispatch accordingly.
Chris@16 104 return detail::do_extract<Feature>(arg1, detail::is_accumulator_set<Arg1>());
Chris@16 105 }
Chris@16 106
Chris@16 107 /// \overload
Chris@16 108 ///
Chris@16 109 /// \param a1 Optional named parameter to be passed to the accumulator's result() function.
Chris@16 110 template<typename AccumulatorSet, typename A1>
Chris@16 111 typename detail::extractor_result<AccumulatorSet, Feature>::type
Chris@16 112 operator ()(AccumulatorSet const &acc, A1 const &a1) const
Chris@16 113 {
Chris@16 114 BOOST_MPL_ASSERT((detail::is_accumulator_set<AccumulatorSet>));
Chris@16 115 typedef typename as_feature<Feature>::type feature_type;
Chris@16 116 return extract_result<feature_type>(acc, a1);
Chris@16 117 }
Chris@16 118
Chris@16 119 // ... other overloads generated by Boost.Preprocessor:
Chris@16 120
Chris@16 121 /// INTERNAL ONLY
Chris@16 122 ///
Chris@16 123 #define BOOST_ACCUMULATORS_EXTRACTOR_FUN_OP(z, n, _) \
Chris@16 124 template<BOOST_PP_ENUM_PARAMS_Z(z, n, typename A)> \
Chris@16 125 struct result<this_type(BOOST_PP_ENUM_PARAMS_Z(z, n, A))> \
Chris@16 126 : detail::extractor_result<A1, Feature> \
Chris@16 127 {}; \
Chris@16 128 template< \
Chris@16 129 typename AccumulatorSet \
Chris@16 130 BOOST_PP_ENUM_TRAILING_PARAMS_Z(z, n, typename A) \
Chris@16 131 > \
Chris@16 132 typename detail::extractor_result<AccumulatorSet, Feature>::type \
Chris@16 133 operator ()( \
Chris@16 134 AccumulatorSet const &acc \
Chris@16 135 BOOST_PP_ENUM_TRAILING_BINARY_PARAMS_Z(z, n, A, const &a) \
Chris@16 136 ) const \
Chris@16 137 { \
Chris@16 138 BOOST_MPL_ASSERT((detail::is_accumulator_set<AccumulatorSet>)); \
Chris@16 139 typedef typename as_feature<Feature>::type feature_type; \
Chris@16 140 return extract_result<feature_type>(acc BOOST_PP_ENUM_TRAILING_PARAMS_Z(z, n, a));\
Chris@16 141 }
Chris@16 142
Chris@16 143 BOOST_PP_REPEAT_FROM_TO(
Chris@16 144 2
Chris@16 145 , BOOST_PP_INC(BOOST_ACCUMULATORS_MAX_ARGS)
Chris@16 146 , BOOST_ACCUMULATORS_EXTRACTOR_FUN_OP
Chris@16 147 , _
Chris@16 148 )
Chris@16 149
Chris@16 150 #ifdef BOOST_ACCUMULATORS_DOXYGEN_INVOKED
Chris@16 151 /// \overload
Chris@16 152 ///
Chris@16 153 template<typename AccumulatorSet, typename A1, typename A2, ...>
Chris@16 154 typename detail::extractor_result<AccumulatorSet, Feature>::type
Chris@16 155 operator ()(AccumulatorSet const &acc, A1 const &a1, A2 const &a2, ...);
Chris@16 156 #endif
Chris@16 157 };
Chris@16 158
Chris@16 159 /// INTERNAL ONLY
Chris@16 160 ///
Chris@16 161 #define BOOST_ACCUMULATORS_ARRAY_REM(Array) \
Chris@16 162 BOOST_PP_TUPLE_REM_CTOR(BOOST_PP_ARRAY_SIZE(Array), BOOST_PP_ARRAY_DATA(Array))
Chris@16 163
Chris@16 164 /// INTERNAL ONLY
Chris@16 165 ///
Chris@16 166 #define BOOST_ACCUMULATORS_SEQ_REM(Seq) \
Chris@16 167 BOOST_ACCUMULATORS_ARRAY_REM(BOOST_PP_SEQ_TO_ARRAY(Seq))
Chris@16 168
Chris@16 169 /// INTERNAL ONLY
Chris@16 170 ///
Chris@16 171 #define BOOST_ACCUMULATORS_ARGS_OP(s, data, elem) \
Chris@16 172 T ## s
Chris@16 173
Chris@16 174 /// INTERNAL ONLY
Chris@16 175 ///
Chris@16 176 #define BOOST_ACCUMULATORS_PARAMS_OP(s, data, elem) \
Chris@16 177 elem T ## s
Chris@16 178
Chris@16 179 /// INTERNAL ONLY
Chris@16 180 ///
Chris@16 181 #define BOOST_ACCUMULATORS_MAKE_FEATURE(Tag, Feature, ParamsSeq) \
Chris@16 182 Tag::Feature< \
Chris@16 183 BOOST_ACCUMULATORS_SEQ_REM( \
Chris@16 184 BOOST_PP_SEQ_TRANSFORM(BOOST_ACCUMULATORS_ARGS_OP, ~, ParamsSeq) \
Chris@16 185 ) \
Chris@16 186 >
Chris@16 187
Chris@16 188 /// INTERNAL ONLY
Chris@16 189 ///
Chris@16 190 #define BOOST_ACCUMULATORS_DEFINE_EXTRACTOR_FUN_IMPL(z, n, Tag, Feature, ParamsSeq) \
Chris@16 191 template< \
Chris@16 192 BOOST_ACCUMULATORS_SEQ_REM( \
Chris@16 193 BOOST_PP_SEQ_TRANSFORM(BOOST_ACCUMULATORS_PARAMS_OP, ~, ParamsSeq) \
Chris@16 194 ) \
Chris@16 195 , typename Arg1 \
Chris@16 196 BOOST_PP_ENUM_TRAILING_PARAMS_Z(z, n, typename A) \
Chris@16 197 > \
Chris@16 198 typename boost::accumulators::detail::extractor_result< \
Chris@16 199 Arg1 \
Chris@16 200 , BOOST_ACCUMULATORS_MAKE_FEATURE(Tag, Feature, ParamsSeq) \
Chris@16 201 >::type \
Chris@16 202 Feature(Arg1 const &arg1 BOOST_PP_ENUM_TRAILING_BINARY_PARAMS_Z(z, n, A, const &a) ) \
Chris@16 203 { \
Chris@16 204 typedef BOOST_ACCUMULATORS_MAKE_FEATURE(Tag, Feature, ParamsSeq) feature_type; \
Chris@16 205 return boost::accumulators::extractor<feature_type>()( \
Chris@16 206 arg1 BOOST_PP_ENUM_TRAILING_PARAMS_Z(z, n, a)); \
Chris@16 207 }
Chris@16 208
Chris@16 209 /// INTERNAL ONLY
Chris@16 210 ///
Chris@16 211 #define BOOST_ACCUMULATORS_DEFINE_EXTRACTOR_FUN(z, n, _) \
Chris@16 212 BOOST_ACCUMULATORS_DEFINE_EXTRACTOR_FUN_IMPL( \
Chris@16 213 z \
Chris@16 214 , n \
Chris@16 215 , BOOST_PP_ARRAY_ELEM(0, _) \
Chris@16 216 , BOOST_PP_ARRAY_ELEM(1, _) \
Chris@16 217 , BOOST_PP_ARRAY_ELEM(2, _) \
Chris@16 218 )
Chris@16 219
Chris@16 220 #define BOOST_ACCUMULATORS_DEFINE_EXTRACTOR(Tag, Feature, ParamSeq) \
Chris@16 221 BOOST_PP_REPEAT( \
Chris@16 222 BOOST_PP_INC(BOOST_ACCUMULATORS_MAX_ARGS) \
Chris@16 223 , BOOST_ACCUMULATORS_DEFINE_EXTRACTOR_FUN \
Chris@16 224 , (3, (Tag, Feature, ParamSeq)) \
Chris@16 225 )
Chris@16 226
Chris@16 227 }} // namespace boost::accumulators
Chris@16 228
Chris@16 229 #endif