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/core/enable_if.hpp> |
13 | #include <boost/parameter/is_argument_pack.hpp> |
14 | #include <boost/mpl/apply_fwd.hpp> // for mpl::na |
15 | #include <boost/mpl/limits/vector.hpp> |
16 | #include <boost/preprocessor/cat.hpp> |
17 | #include <boost/preprocessor/arithmetic/inc.hpp> |
18 | #include <boost/preprocessor/repetition/enum_params_with_a_default.hpp> |
19 | #include <boost/preprocessor/repetition/enum_trailing_params.hpp> |
20 | #include <boost/preprocessor/repetition/enum_trailing_binary_params.hpp> |
21 | #include <boost/preprocessor/repetition/repeat_from_to.hpp> |
22 | #include <boost/accumulators/numeric/functional_fwd.hpp> |
23 | |
24 | #ifndef BOOST_ACCUMULATORS_MAX_FEATURES |
25 | /// The maximum number of accumulators that may be put in an accumulator_set. |
26 | /// Defaults to BOOST_MPL_LIMIT_VECTOR_SIZE (which defaults to 20). |
27 | # define BOOST_ACCUMULATORS_MAX_FEATURES BOOST_MPL_LIMIT_VECTOR_SIZE |
28 | #endif |
29 | |
30 | #if BOOST_ACCUMULATORS_MAX_FEATURES > BOOST_MPL_LIMIT_VECTOR_SIZE |
31 | # error BOOST_ACCUMULATORS_MAX_FEATURES cannot be larger than BOOST_MPL_LIMIT_VECTOR_SIZE |
32 | #endif |
33 | |
34 | #ifndef BOOST_ACCUMULATORS_MAX_ARGS |
35 | /// The maximum number of arguments that may be specified to an accumulator_set's |
36 | /// accumulation function. Defaults to 15. |
37 | # define BOOST_ACCUMULATORS_MAX_ARGS 15 |
38 | #endif |
39 | |
40 | #if BOOST_WORKAROUND(__GNUC__, == 3) \ |
41 | || BOOST_WORKAROUND(__EDG_VERSION__, BOOST_TESTED_AT(306)) |
42 | # define BOOST_ACCUMULATORS_BROKEN_CONST_OVERLOADS |
43 | #endif |
44 | |
45 | #ifdef BOOST_ACCUMULATORS_BROKEN_CONST_OVERLOADS |
46 | # include <boost/type_traits/is_const.hpp> |
47 | # define BOOST_ACCUMULATORS_PROTO_DISABLE_IF_IS_CONST(T)\ |
48 | , typename boost::disable_if<boost::is_const<T> >::type * = 0 |
49 | #else |
50 | # define BOOST_ACCUMULATORS_PROTO_DISABLE_IF_IS_CONST(T) |
51 | #endif |
52 | |
53 | #define BOOST_ACCUMULATORS_GCC_VERSION \ |
54 | (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) |
55 | |
56 | namespace boost { namespace accumulators |
57 | { |
58 | |
59 | /////////////////////////////////////////////////////////////////////////////// |
60 | // Named parameters tags |
61 | // |
62 | namespace tag |
63 | { |
64 | struct sample; |
65 | struct weight; |
66 | struct accumulator; |
67 | struct weights; |
68 | } |
69 | |
70 | /////////////////////////////////////////////////////////////////////////////// |
71 | // User-level features |
72 | // |
73 | namespace tag |
74 | { |
75 | template<typename ValueType, typename Tag> |
76 | struct value; |
77 | |
78 | template<typename Tag> |
79 | struct value_tag; |
80 | |
81 | template<typename Referent, typename Tag> |
82 | struct reference; |
83 | |
84 | template<typename Tag> |
85 | struct reference_tag; |
86 | |
87 | template<typename Type, typename Tag = void, typename AccumulatorSet = void> |
88 | struct external; |
89 | |
90 | template<typename Feature> |
91 | struct droppable; |
92 | } |
93 | |
94 | template<typename Accumulator> |
95 | struct droppable_accumulator_base; |
96 | |
97 | template<typename Accumulator> |
98 | struct droppable_accumulator; |
99 | |
100 | template<typename Accumulator> |
101 | struct with_cached_result; |
102 | |
103 | template<typename Sample, typename Features, typename Weight = void> |
104 | struct accumulator_set; |
105 | |
106 | template<typename Feature> |
107 | struct ; |
108 | |
109 | template<typename Feature> |
110 | struct feature_of; |
111 | |
112 | template<typename Feature> |
113 | struct as_feature; |
114 | |
115 | template<typename Feature> |
116 | struct as_weighted_feature; |
117 | |
118 | template<BOOST_PP_ENUM_PARAMS_WITH_A_DEFAULT(BOOST_ACCUMULATORS_MAX_FEATURES, typename Feature, mpl::na)> |
119 | struct depends_on; |
120 | |
121 | template<BOOST_PP_ENUM_PARAMS_WITH_A_DEFAULT(BOOST_ACCUMULATORS_MAX_FEATURES, typename Feature, mpl::na)> |
122 | struct features; |
123 | |
124 | template<typename Feature, typename AccumulatorSet> |
125 | typename mpl::apply<AccumulatorSet, Feature>::type const & |
126 | find_accumulator(AccumulatorSet const &acc); |
127 | |
128 | template<typename Feature, typename AccumulatorSet> |
129 | typename mpl::apply<AccumulatorSet, Feature>::type::result_type |
130 | (AccumulatorSet const &acc); |
131 | |
132 | namespace detail |
133 | { |
134 | struct _enabler |
135 | { |
136 | }; |
137 | } |
138 | |
139 | // ... other overloads generated by Boost.Preprocessor: |
140 | |
141 | /// INTERNAL ONLY |
142 | /// |
143 | #define (z, n, _) \ |
144 | template< \ |
145 | typename Feature \ |
146 | , typename AccumulatorSet \ |
147 | BOOST_PP_ENUM_TRAILING_PARAMS_Z(z, n, typename A) \ |
148 | > \ |
149 | typename mpl::apply<AccumulatorSet, Feature>::type::result_type \ |
150 | ( \ |
151 | AccumulatorSet const &acc \ |
152 | BOOST_PP_ENUM_TRAILING_BINARY_PARAMS_Z(z, n, A, const &a) \ |
153 | , typename boost::enable_if< \ |
154 | parameter::is_argument_pack<A0> \ |
155 | , detail::_enabler \ |
156 | >::type = detail::_enabler() \ |
157 | ); \ |
158 | template< \ |
159 | typename Feature \ |
160 | , typename AccumulatorSet \ |
161 | BOOST_PP_ENUM_TRAILING_PARAMS_Z(z, n, typename A) \ |
162 | > \ |
163 | typename mpl::apply<AccumulatorSet, Feature>::type::result_type \ |
164 | ( \ |
165 | AccumulatorSet const &acc \ |
166 | BOOST_PP_ENUM_TRAILING_BINARY_PARAMS_Z(z, n, A, const &a) \ |
167 | , typename boost::disable_if< \ |
168 | parameter::is_argument_pack<A0> \ |
169 | , detail::_enabler \ |
170 | >::type = detail::_enabler() \ |
171 | ); |
172 | |
173 | /// INTERNAL ONLY |
174 | /// |
175 | BOOST_PP_REPEAT_FROM_TO( |
176 | 1 |
177 | , BOOST_PP_INC(BOOST_ACCUMULATORS_MAX_ARGS) |
178 | , BOOST_ACCUMULATORS_EXTRACT_RESULT_FWD |
179 | , _ |
180 | ) |
181 | |
182 | #undef BOOST_ACCUMULATORS_EXTRACT_RESULT_FWD |
183 | |
184 | #ifdef BOOST_ACCUMULATORS_DOXYGEN_INVOKED |
185 | template<typename Feature, typename AccumulatorSet, typename A1, typename A2 ...> |
186 | typename mpl::apply<AccumulatorSet, Feature>::type::result_type |
187 | extract_result(AccumulatorSet const &acc, A1 const &a1, A2 const &a2 ...); |
188 | #endif |
189 | |
190 | namespace impl |
191 | { |
192 | using namespace numeric::operators; |
193 | |
194 | template<typename Accumulator, typename Tag> |
195 | struct external_impl; |
196 | } |
197 | |
198 | namespace detail |
199 | { |
200 | template<typename Accumulator> |
201 | struct feature_tag; |
202 | |
203 | template<typename Feature, typename Sample, typename Weight> |
204 | struct to_accumulator; |
205 | |
206 | struct accumulator_set_base; |
207 | |
208 | template<typename T> |
209 | struct is_accumulator_set; |
210 | |
211 | inline void ignore_variable(void const *) {} |
212 | } |
213 | |
214 | }} // namespace boost::accumulators |
215 | |
216 | #define BOOST_ACCUMULATORS_IGNORE_GLOBAL(X) \ |
217 | namespace detail \ |
218 | { \ |
219 | struct BOOST_PP_CAT(ignore_, X) \ |
220 | { \ |
221 | void ignore() \ |
222 | { \ |
223 | boost::accumulators::detail::ignore_variable(&X); \ |
224 | } \ |
225 | }; \ |
226 | } \ |
227 | /**/ |
228 | |
229 | #include <boost/parameter/nested_keyword.hpp> |
230 | |
231 | #endif // include guard |
232 | |
233 | |