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1 | /////////////////////////////////////////////////////////////////////////////// |
2 | // accumulators_fwd.hpp | |
3 | // | |
4 | // Copyright 2005 Eric Niebler. Distributed under the Boost | |
5 | // Software License, Version 1.0. (See accompanying file | |
6 | // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
7 | ||
8 | #ifndef BOOST_ACCUMULATORS_ACCUMULATORS_FWD_HPP_EAN_28_10_2005 | |
9 | #define BOOST_ACCUMULATORS_ACCUMULATORS_FWD_HPP_EAN_28_10_2005 | |
10 | ||
11 | #include <boost/config.hpp> | |
12 | #include <boost/mpl/apply_fwd.hpp> // for mpl::na | |
13 | #include <boost/mpl/limits/vector.hpp> | |
14 | #include <boost/preprocessor/cat.hpp> | |
15 | #include <boost/preprocessor/arithmetic/inc.hpp> | |
16 | #include <boost/preprocessor/repetition/enum_params_with_a_default.hpp> | |
17 | #include <boost/preprocessor/repetition/enum_trailing_params.hpp> | |
18 | #include <boost/preprocessor/repetition/enum_trailing_binary_params.hpp> | |
19 | #include <boost/preprocessor/repetition/repeat_from_to.hpp> | |
20 | #include <boost/accumulators/numeric/functional_fwd.hpp> | |
21 | ||
22 | #ifndef BOOST_ACCUMULATORS_MAX_FEATURES | |
23 | /// The maximum number of accumulators that may be put in an accumulator_set. | |
24 | /// Defaults to BOOST_MPL_LIMIT_VECTOR_SIZE (which defaults to 20). | |
25 | # define BOOST_ACCUMULATORS_MAX_FEATURES BOOST_MPL_LIMIT_VECTOR_SIZE | |
26 | #endif | |
27 | ||
28 | #if BOOST_ACCUMULATORS_MAX_FEATURES > BOOST_MPL_LIMIT_VECTOR_SIZE | |
29 | # error BOOST_ACCUMULATORS_MAX_FEATURES cannot be larger than BOOST_MPL_LIMIT_VECTOR_SIZE | |
30 | #endif | |
31 | ||
32 | #ifndef BOOST_ACCUMULATORS_MAX_ARGS | |
33 | /// The maximum number of arguments that may be specified to an accumulator_set's | |
34 | /// accumulation function. Defaults to 15. | |
35 | # define BOOST_ACCUMULATORS_MAX_ARGS 15 | |
36 | #endif | |
37 | ||
38 | #if BOOST_WORKAROUND(__GNUC__, == 3) \ | |
39 | || BOOST_WORKAROUND(__EDG_VERSION__, BOOST_TESTED_AT(306)) | |
40 | # define BOOST_ACCUMULATORS_BROKEN_CONST_OVERLOADS | |
41 | #endif | |
42 | ||
43 | #ifdef BOOST_ACCUMULATORS_BROKEN_CONST_OVERLOADS | |
44 | # include <boost/utility/enable_if.hpp> | |
45 | # include <boost/type_traits/is_const.hpp> | |
46 | # define BOOST_ACCUMULATORS_PROTO_DISABLE_IF_IS_CONST(T)\ | |
47 | , typename boost::disable_if<boost::is_const<T> >::type * = 0 | |
48 | #else | |
49 | # define BOOST_ACCUMULATORS_PROTO_DISABLE_IF_IS_CONST(T) | |
50 | #endif | |
51 | ||
52 | #define BOOST_ACCUMULATORS_GCC_VERSION \ | |
53 | (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) | |
54 | ||
55 | namespace boost { namespace accumulators | |
56 | { | |
57 | ||
58 | /////////////////////////////////////////////////////////////////////////////// | |
59 | // Named parameters tags | |
60 | // | |
61 | namespace tag | |
62 | { | |
63 | struct sample; | |
64 | struct weight; | |
65 | struct accumulator; | |
66 | struct weights; | |
67 | } | |
68 | ||
69 | /////////////////////////////////////////////////////////////////////////////// | |
70 | // User-level features | |
71 | // | |
72 | namespace tag | |
73 | { | |
74 | template<typename ValueType, typename Tag> | |
75 | struct value; | |
76 | ||
77 | template<typename Tag> | |
78 | struct value_tag; | |
79 | ||
80 | template<typename Referent, typename Tag> | |
81 | struct reference; | |
82 | ||
83 | template<typename Tag> | |
84 | struct reference_tag; | |
85 | ||
86 | template<typename Type, typename Tag = void, typename AccumulatorSet = void> | |
87 | struct external; | |
88 | ||
89 | template<typename Feature> | |
90 | struct droppable; | |
91 | } | |
92 | ||
93 | template<typename Accumulator> | |
94 | struct droppable_accumulator_base; | |
95 | ||
96 | template<typename Accumulator> | |
97 | struct droppable_accumulator; | |
98 | ||
99 | template<typename Accumulator> | |
100 | struct with_cached_result; | |
101 | ||
102 | template<typename Sample, typename Features, typename Weight = void> | |
103 | struct accumulator_set; | |
104 | ||
105 | template<typename Feature> | |
106 | struct extractor; | |
107 | ||
108 | template<typename Feature> | |
109 | struct feature_of; | |
110 | ||
111 | template<typename Feature> | |
112 | struct as_feature; | |
113 | ||
114 | template<typename Feature> | |
115 | struct as_weighted_feature; | |
116 | ||
117 | template<BOOST_PP_ENUM_PARAMS_WITH_A_DEFAULT(BOOST_ACCUMULATORS_MAX_FEATURES, typename Feature, mpl::na)> | |
118 | struct depends_on; | |
119 | ||
120 | template<BOOST_PP_ENUM_PARAMS_WITH_A_DEFAULT(BOOST_ACCUMULATORS_MAX_FEATURES, typename Feature, mpl::na)> | |
121 | struct features; | |
122 | ||
123 | template<typename Feature, typename AccumulatorSet> | |
124 | typename mpl::apply<AccumulatorSet, Feature>::type const & | |
125 | find_accumulator(AccumulatorSet const &acc); | |
126 | ||
127 | template<typename Feature, typename AccumulatorSet> | |
128 | typename mpl::apply<AccumulatorSet, Feature>::type::result_type | |
129 | extract_result(AccumulatorSet const &acc); | |
130 | ||
131 | template<typename Feature, typename AccumulatorSet, typename A1> | |
132 | typename mpl::apply<AccumulatorSet, Feature>::type::result_type | |
133 | extract_result(AccumulatorSet const &acc, A1 const &a1); | |
134 | ||
135 | // ... other overloads generated by Boost.Preprocessor: | |
136 | ||
137 | /// INTERNAL ONLY | |
138 | /// | |
139 | #define BOOST_ACCUMULATORS_EXTRACT_RESULT_FWD(z, n, _) \ | |
140 | template< \ | |
141 | typename Feature \ | |
142 | , typename AccumulatorSet \ | |
143 | BOOST_PP_ENUM_TRAILING_PARAMS_Z(z, n, typename A) \ | |
144 | > \ | |
145 | typename mpl::apply<AccumulatorSet, Feature>::type::result_type \ | |
146 | extract_result( \ | |
147 | AccumulatorSet const &acc \ | |
148 | BOOST_PP_ENUM_TRAILING_BINARY_PARAMS_Z(z, n, A, const &a) \ | |
149 | ); | |
150 | ||
151 | /// INTERNAL ONLY | |
152 | /// | |
153 | BOOST_PP_REPEAT_FROM_TO( | |
154 | 2 | |
155 | , BOOST_PP_INC(BOOST_ACCUMULATORS_MAX_ARGS) | |
156 | , BOOST_ACCUMULATORS_EXTRACT_RESULT_FWD | |
157 | , _ | |
158 | ) | |
159 | ||
160 | #ifdef BOOST_ACCUMULATORS_DOXYGEN_INVOKED | |
161 | template<typename Feature, typename AccumulatorSet, typename A1, typename A2 ...> | |
162 | typename mpl::apply<AccumulatorSet, Feature>::type::result_type | |
163 | extract_result(AccumulatorSet const &acc, A1 const &a1, A2 const &a2 ...); | |
164 | #endif | |
165 | ||
166 | namespace impl | |
167 | { | |
168 | using namespace numeric::operators; | |
169 | ||
170 | template<typename Accumulator, typename Tag> | |
171 | struct external_impl; | |
172 | } | |
173 | ||
174 | namespace detail | |
175 | { | |
176 | template<typename Accumulator> | |
177 | struct feature_tag; | |
178 | ||
179 | template<typename Feature, typename Sample, typename Weight> | |
180 | struct to_accumulator; | |
181 | ||
182 | struct accumulator_set_base; | |
183 | ||
184 | template<typename T> | |
185 | struct is_accumulator_set; | |
186 | ||
187 | inline void ignore_variable(void const *) {} | |
188 | ||
189 | #define BOOST_ACCUMULATORS_IGNORE_GLOBAL(X) \ | |
190 | namespace detail \ | |
191 | { \ | |
192 | struct BOOST_PP_CAT(ignore_, X) \ | |
193 | { \ | |
194 | void ignore() \ | |
195 | { \ | |
196 | boost::accumulators::detail::ignore_variable(&X); \ | |
197 | } \ | |
198 | }; \ | |
199 | } \ | |
200 | /**/ | |
201 | } | |
202 | ||
203 | }} // namespace boost::accumulators | |
204 | ||
205 | // For defining boost::parameter keywords that can be inherited from to | |
206 | // get a nested, class-scoped keyword with the requested alias | |
207 | #define BOOST_PARAMETER_NESTED_KEYWORD(tag_namespace, name, alias) \ | |
208 | namespace tag_namespace \ | |
209 | { \ | |
210 | template<int Dummy = 0> \ | |
211 | struct name ## _ \ | |
212 | { \ | |
213 | static char const* keyword_name() \ | |
214 | { \ | |
215 | return #name; \ | |
216 | } \ | |
217 | static ::boost::parameter::keyword<name ## _<Dummy> > &alias; \ | |
218 | }; \ | |
219 | template<int Dummy> \ | |
220 | ::boost::parameter::keyword<name ## _<Dummy> > &name ## _<Dummy>::alias = \ | |
221 | ::boost::parameter::keyword<name ## _<Dummy> >::get(); \ | |
222 | typedef name ## _ <> name; \ | |
223 | } \ | |
224 | namespace \ | |
225 | { \ | |
226 | ::boost::parameter::keyword<tag_namespace::name> &name = \ | |
227 | ::boost::parameter::keyword<tag_namespace::name>::get(); \ | |
228 | } | |
229 | ||
230 | #endif |