1 ///////////////////////////////////////////////////////////////////////////////
3 /// Contains definition of transform<> and transform_impl<> helpers.
5 // Copyright 2008 Eric Niebler. Distributed under the Boost
6 // Software License, Version 1.0. (See accompanying file
7 // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
9 #ifndef BOOST_PROTO_TRANSFORM_IMPL_HPP_EAN_04_03_2008
10 #define BOOST_PROTO_TRANSFORM_IMPL_HPP_EAN_04_03_2008
12 #include <boost/config.hpp>
13 #include <boost/mpl/bool.hpp>
14 #include <boost/type_traits/add_const.hpp>
15 #include <boost/type_traits/add_reference.hpp>
16 #include <boost/proto/proto_fwd.hpp>
17 #include <boost/proto/detail/any.hpp>
18 #include <boost/proto/detail/static_const.hpp>
21 # pragma warning(push)
22 # pragma warning(disable : 4714) // function 'xxx' marked as __forceinline not inlined
25 namespace boost { namespace proto
29 ////////////////////////////////////////////////////////////////////////////////////////////
33 ////////////////////////////////////////////////////////////////////////////////////////////
37 typedef void proto_environment_;
39 template<typename OtherTag, typename OtherValue = key_not_found>
42 typedef OtherValue type;
44 typename add_reference<typename add_const<OtherValue>::type>::type
48 key_not_found operator[](detail::any) const
50 return key_not_found();
54 T const &at(detail::any, T const &t) const
61 ////////////////////////////////////////////////////////////////////////////////////////////
63 template<typename T, typename Void>
69 struct is_env<T, typename T::proto_environment_>
74 struct is_env<T &, void>
78 #ifdef BOOST_NO_CXX11_RVALUE_REFERENCES
82 #define BOOST_PROTO_TRANSFORM_(PrimitiveTransform, X) \
83 BOOST_PROTO_CALLABLE() \
84 typedef X proto_is_transform_; \
85 typedef PrimitiveTransform transform_type; \
87 template<typename Sig> \
90 typedef typename boost::proto::detail::apply_transform<Sig>::result_type type; \
93 template<typename Expr> \
95 typename boost::proto::detail::apply_transform<transform_type(Expr &)>::result_type \
96 operator ()(Expr &e) const \
98 boost::proto::empty_state s = 0; \
99 boost::proto::empty_env d; \
100 return boost::proto::detail::apply_transform<transform_type(Expr &)>()(e, s, d); \
103 template<typename Expr> \
105 typename boost::proto::detail::apply_transform<transform_type(Expr const &)>::result_type \
106 operator ()(Expr const &e) const \
108 boost::proto::empty_state s = 0; \
109 boost::proto::empty_env d; \
110 return boost::proto::detail::apply_transform<transform_type(Expr const &)>()(e, s, d); \
113 template<typename Expr, typename State> \
115 typename boost::proto::detail::apply_transform<transform_type(Expr &, State &)>::result_type \
116 operator ()(Expr &e, State &s) const \
118 boost::proto::empty_env d; \
119 return boost::proto::detail::apply_transform<transform_type(Expr &, State &)>()(e, s, d); \
122 template<typename Expr, typename State> \
124 typename boost::proto::detail::apply_transform<transform_type(Expr const &, State &)>::result_type \
125 operator ()(Expr const &e, State &s) const \
127 boost::proto::empty_env d; \
128 return boost::proto::detail::apply_transform<transform_type(Expr const &, State &)>()(e, s, d); \
131 template<typename Expr, typename State> \
133 typename boost::proto::detail::apply_transform<transform_type(Expr &, State const &)>::result_type \
134 operator ()(Expr &e, State const &s) const \
136 boost::proto::empty_env d; \
137 return boost::proto::detail::apply_transform<transform_type(Expr &, State const &)>()(e, s, d); \
140 template<typename Expr, typename State> \
142 typename boost::proto::detail::apply_transform<transform_type(Expr const &, State const &)>::result_type \
143 operator ()(Expr const &e, State const &s) const \
145 boost::proto::empty_env d; \
146 return boost::proto::detail::apply_transform<transform_type(Expr const &, State const &)>()(e, s, d); \
149 template<typename Expr, typename State, typename Data> \
151 typename boost::proto::detail::apply_transform<transform_type(Expr &, State &, Data &)>::result_type \
152 operator ()(Expr &e, State &s, Data &d) const \
154 return boost::proto::detail::apply_transform<transform_type(Expr &, State &, Data &)>()(e, s, d); \
157 template<typename Expr, typename State, typename Data> \
159 typename boost::proto::detail::apply_transform<transform_type(Expr const &, State &, Data &)>::result_type \
160 operator ()(Expr const &e, State &s, Data &d) const \
162 return boost::proto::detail::apply_transform<transform_type(Expr const &, State &, Data &)>()(e, s, d); \
165 template<typename Expr, typename State, typename Data> \
167 typename boost::proto::detail::apply_transform<transform_type(Expr &, State const &, Data &)>::result_type \
168 operator ()(Expr &e, State const &s, Data &d) const \
170 return boost::proto::detail::apply_transform<transform_type(Expr &, State const &, Data &)>()(e, s, d); \
173 template<typename Expr, typename State, typename Data> \
175 typename boost::proto::detail::apply_transform<transform_type(Expr const &, State const &, Data &)>::result_type \
176 operator ()(Expr const &e, State const &s, Data &d) const \
178 return boost::proto::detail::apply_transform<transform_type(Expr const &, State const &, Data &)>()(e, s, d); \
186 #define BOOST_PROTO_TRANSFORM_(PrimitiveTransform, X) \
187 BOOST_PROTO_CALLABLE() \
188 typedef X proto_is_transform_; \
189 typedef PrimitiveTransform transform_type; \
191 template<typename Sig> \
194 typedef typename boost::proto::detail::apply_transform<Sig>::result_type type; \
197 template<typename Expr> \
199 typename boost::proto::detail::apply_transform<transform_type(Expr const &)>::result_type \
200 operator ()(Expr &&e) const \
202 boost::proto::empty_state s = 0; \
203 boost::proto::empty_env d; \
204 return boost::proto::detail::apply_transform<transform_type(Expr const &)>()(e, s, d); \
207 template<typename Expr, typename State> \
209 typename boost::proto::detail::apply_transform<transform_type(Expr const &, State const &)>::result_type \
210 operator ()(Expr &&e, State &&s) const \
212 boost::proto::empty_env d; \
213 return boost::proto::detail::apply_transform<transform_type(Expr const &, State const &)>()(e, s, d); \
216 template<typename Expr, typename State, typename Data> \
218 typename boost::proto::detail::apply_transform<transform_type(Expr const &, State const &, Data const &)>::result_type \
219 operator ()(Expr &&e, State &&s, Data &&d) const \
221 return boost::proto::detail::apply_transform<transform_type(Expr const &, State const &, Data const &)>()(e, s, d); \
227 #define BOOST_PROTO_TRANSFORM(PrimitiveTransform) \
228 BOOST_PROTO_TRANSFORM_(PrimitiveTransform, void) \
233 template<typename Sig>
234 struct apply_transform;
236 template<typename PrimitiveTransform, typename Expr>
237 struct apply_transform<PrimitiveTransform(Expr)>
238 : PrimitiveTransform::template impl<Expr, empty_state, empty_env>
241 template<typename PrimitiveTransform, typename Expr, typename State>
242 struct apply_transform<PrimitiveTransform(Expr, State)>
243 : PrimitiveTransform::template impl<Expr, State, empty_env>
246 template<typename PrimitiveTransform, typename Expr, typename State, typename Data>
247 struct apply_transform<PrimitiveTransform(Expr, State, Data)>
248 : PrimitiveTransform::template impl<Expr, State, Data>
252 template<typename PrimitiveTransform, typename X>
255 BOOST_PROTO_TRANSFORM_(PrimitiveTransform, X)
258 template<typename Expr, typename State, typename Data>
259 struct transform_impl
261 typedef Expr const expr;
262 typedef Expr const &expr_param;
263 typedef State const state;
264 typedef State const &state_param;
265 typedef Data const data;
266 typedef Data const &data_param;
269 template<typename Expr, typename State, typename Data>
270 struct transform_impl<Expr &, State, Data>
273 typedef Expr &expr_param;
274 typedef State const state;
275 typedef State const &state_param;
276 typedef Data const data;
277 typedef Data const &data_param;
280 template<typename Expr, typename State, typename Data>
281 struct transform_impl<Expr, State &, Data>
283 typedef Expr const expr;
284 typedef Expr const &expr_param;
286 typedef State &state_param;
287 typedef Data const data;
288 typedef Data const &data_param;
291 template<typename Expr, typename State, typename Data>
292 struct transform_impl<Expr, State, Data &>
294 typedef Expr const expr;
295 typedef Expr const &expr_param;
296 typedef State const state;
297 typedef State const &state_param;
299 typedef Data &data_param;
302 template<typename Expr, typename State, typename Data>
303 struct transform_impl<Expr &, State &, Data>
306 typedef Expr &expr_param;
308 typedef State &state_param;
309 typedef Data const data;
310 typedef Data const &data_param;
313 template<typename Expr, typename State, typename Data>
314 struct transform_impl<Expr &, State, Data &>
317 typedef Expr &expr_param;
318 typedef State const state;
319 typedef State const &state_param;
321 typedef Data &data_param;
324 template<typename Expr, typename State, typename Data>
325 struct transform_impl<Expr, State &, Data &>
327 typedef Expr const expr;
328 typedef Expr const &expr_param;
330 typedef State &state_param;
332 typedef Data &data_param;
335 template<typename Expr, typename State, typename Data>
336 struct transform_impl<Expr &, State &, Data &>
339 typedef Expr &expr_param;
341 typedef State &state_param;
343 typedef Data &data_param;
346 }} // namespace boost::proto
348 #if defined(_MSC_VER)
349 # pragma warning(pop)