1 | /////////////////////////////////////////////////////////////////////////////// |
2 | /// \file operators.hpp |
3 | /// Contains all the overloaded operators that make it possible to build |
4 | /// Proto expression trees. |
5 | // |
6 | // Copyright 2008 Eric Niebler. Distributed under the Boost |
7 | // Software License, Version 1.0. (See accompanying file |
8 | // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
9 | |
10 | #ifndef BOOST_PROTO_OPERATORS_HPP_EAN_04_01_2005 |
11 | #define BOOST_PROTO_OPERATORS_HPP_EAN_04_01_2005 |
12 | |
13 | #include <boost/config.hpp> |
14 | #include <boost/preprocessor/punctuation/comma.hpp> |
15 | #include <boost/mpl/logical.hpp> |
16 | #include <boost/utility/enable_if.hpp> |
17 | #include <boost/proto/proto_fwd.hpp> |
18 | #include <boost/proto/tags.hpp> |
19 | #include <boost/proto/domain.hpp> |
20 | #include <boost/proto/matches.hpp> |
21 | #include <boost/proto/generate.hpp> |
22 | #include <boost/proto/make_expr.hpp> |
23 | |
24 | #if defined(_MSC_VER) |
25 | # pragma warning(push) |
26 | # pragma warning(disable : 4714) // function 'xxx' marked as __forceinline not inlined |
27 | #endif |
28 | |
29 | namespace boost { namespace proto |
30 | { |
31 | namespace detail |
32 | { |
33 | template<typename MakeExpr, typename Grammar> |
34 | struct lazy_matches |
35 | : proto::matches<typename MakeExpr::type, Grammar> |
36 | {}; |
37 | |
38 | template<typename Domain, typename Grammar, typename Trait, typename Tag, typename Arg> |
39 | struct enable_unary |
40 | : boost::lazy_enable_if_c< |
41 | boost::mpl::and_< |
42 | Trait |
43 | , lazy_matches<result_of::make_expr<Tag, basic_default_domain, Arg>, Grammar> |
44 | >::value |
45 | , result_of::make_expr<Tag, Domain, Arg> |
46 | > |
47 | {}; |
48 | |
49 | template<typename Domain, typename Trait, typename Tag, typename Arg> |
50 | struct enable_unary<Domain, proto::_, Trait, Tag, Arg &> |
51 | : boost::lazy_enable_if_c< |
52 | Trait::value |
53 | , result_of::make_expr<Tag, Domain, Arg &> |
54 | > |
55 | {}; |
56 | |
57 | template<typename Trait, typename Tag, typename Arg> |
58 | struct enable_unary<deduce_domain, not_a_grammar, Trait, Tag, Arg &> |
59 | : enable_unary< |
60 | typename domain_of<Arg>::type |
61 | , typename domain_of<Arg>::type::proto_grammar |
62 | , Trait |
63 | , Tag |
64 | , Arg & |
65 | > |
66 | {}; |
67 | |
68 | template<typename Domain, typename Grammar, typename Trait, typename Tag, typename Left, typename Right> |
69 | struct enable_binary |
70 | : boost::lazy_enable_if_c< |
71 | boost::mpl::and_< |
72 | Trait |
73 | , lazy_matches<result_of::make_expr<Tag, basic_default_domain, Left, Right>, Grammar> |
74 | >::value |
75 | , result_of::make_expr<Tag, Domain, Left, Right> |
76 | > |
77 | {}; |
78 | |
79 | template<typename Domain, typename Trait, typename Tag, typename Left, typename Right> |
80 | struct enable_binary<Domain, proto::_, Trait, Tag, Left &, Right &> |
81 | : boost::lazy_enable_if_c< |
82 | Trait::value |
83 | , result_of::make_expr<Tag, Domain, Left &, Right &> |
84 | > |
85 | {}; |
86 | |
87 | template<typename Trait, typename Tag, typename Left, typename Right> |
88 | struct enable_binary<deduce_domain, not_a_grammar, Trait, Tag, Left &, Right &> |
89 | : enable_binary< |
90 | typename deduce_domain2<Left, Right>::type |
91 | , typename deduce_domain2<Left, Right>::type::proto_grammar |
92 | , Trait |
93 | , Tag |
94 | , Left & |
95 | , Right & |
96 | > |
97 | {}; |
98 | |
99 | } // detail |
100 | |
101 | #define BOOST_PROTO_UNARY_OP_IS_POSTFIX_0 |
102 | #define BOOST_PROTO_UNARY_OP_IS_POSTFIX_1 , int |
103 | |
104 | #ifdef BOOST_NO_CXX11_RVALUE_REFERENCES |
105 | |
106 | #define BOOST_PROTO_DEFINE_UNARY_OPERATOR(OP, TAG, TRAIT, DOMAIN, POST) \ |
107 | template<typename Arg> \ |
108 | BOOST_PROTO_DISABLE_MSVC_C4714 BOOST_FORCEINLINE \ |
109 | typename boost::proto::detail::enable_unary< \ |
110 | DOMAIN \ |
111 | , DOMAIN::proto_grammar \ |
112 | , BOOST_PROTO_APPLY_UNARY_(TRAIT, Arg) \ |
113 | , TAG \ |
114 | , Arg & \ |
115 | >::type const \ |
116 | operator OP(Arg &arg BOOST_PROTO_UNARY_OP_IS_POSTFIX_ ## POST) \ |
117 | { \ |
118 | return boost::proto::detail::make_expr_<TAG, DOMAIN, Arg &>()(arg); \ |
119 | } \ |
120 | \ |
121 | template<typename Arg> \ |
122 | BOOST_PROTO_DISABLE_MSVC_C4714 BOOST_FORCEINLINE \ |
123 | typename boost::proto::detail::enable_unary< \ |
124 | DOMAIN \ |
125 | , DOMAIN::proto_grammar \ |
126 | , BOOST_PROTO_APPLY_UNARY_(TRAIT, Arg) \ |
127 | , TAG \ |
128 | , Arg const & \ |
129 | >::type const \ |
130 | operator OP(Arg const &arg BOOST_PROTO_UNARY_OP_IS_POSTFIX_ ## POST) \ |
131 | { \ |
132 | return boost::proto::detail::make_expr_<TAG, DOMAIN, Arg const &>()(arg); \ |
133 | } \ |
134 | /**/ |
135 | |
136 | #define BOOST_PROTO_DEFINE_BINARY_OPERATOR(OP, TAG, TRAIT, DOMAIN) \ |
137 | template<typename Left, typename Right> \ |
138 | BOOST_PROTO_DISABLE_MSVC_C4714 BOOST_FORCEINLINE \ |
139 | typename boost::proto::detail::enable_binary< \ |
140 | DOMAIN \ |
141 | , DOMAIN::proto_grammar \ |
142 | , BOOST_PROTO_APPLY_BINARY_(TRAIT, Left, Right) \ |
143 | , TAG \ |
144 | , Left & \ |
145 | , Right & \ |
146 | >::type const \ |
147 | operator OP(Left &left, Right &right) \ |
148 | { \ |
149 | return boost::proto::detail::make_expr_<TAG, DOMAIN, Left &, Right &>()(left, right); \ |
150 | } \ |
151 | \ |
152 | template<typename Left, typename Right> \ |
153 | BOOST_PROTO_DISABLE_MSVC_C4714 BOOST_FORCEINLINE \ |
154 | typename boost::proto::detail::enable_binary< \ |
155 | DOMAIN \ |
156 | , DOMAIN::proto_grammar \ |
157 | , BOOST_PROTO_APPLY_BINARY_(TRAIT, Left, Right) \ |
158 | , TAG \ |
159 | , Left & \ |
160 | , Right const & \ |
161 | >::type const \ |
162 | operator OP(Left &left, Right const &right) \ |
163 | { \ |
164 | return boost::proto::detail::make_expr_<TAG, DOMAIN, Left &, Right const &>()(left, right); \ |
165 | } \ |
166 | \ |
167 | template<typename Left, typename Right> \ |
168 | BOOST_PROTO_DISABLE_MSVC_C4714 BOOST_FORCEINLINE \ |
169 | typename boost::proto::detail::enable_binary< \ |
170 | DOMAIN \ |
171 | , DOMAIN::proto_grammar \ |
172 | , BOOST_PROTO_APPLY_BINARY_(TRAIT, Left, Right) \ |
173 | , TAG \ |
174 | , Left const & \ |
175 | , Right & \ |
176 | >::type const \ |
177 | operator OP(Left const &left, Right &right) \ |
178 | { \ |
179 | return boost::proto::detail::make_expr_<TAG, DOMAIN, Left const &, Right &>()(left, right); \ |
180 | } \ |
181 | \ |
182 | template<typename Left, typename Right> \ |
183 | BOOST_PROTO_DISABLE_MSVC_C4714 BOOST_FORCEINLINE \ |
184 | typename boost::proto::detail::enable_binary< \ |
185 | DOMAIN \ |
186 | , DOMAIN::proto_grammar \ |
187 | , BOOST_PROTO_APPLY_BINARY_(TRAIT, Left, Right) \ |
188 | , TAG \ |
189 | , Left const & \ |
190 | , Right const & \ |
191 | >::type const \ |
192 | operator OP(Left const &left, Right const &right) \ |
193 | { \ |
194 | return boost::proto::detail::make_expr_<TAG, DOMAIN, Left const &, Right const &>()(left, right);\ |
195 | } \ |
196 | /**/ |
197 | |
198 | #else |
199 | |
200 | #define BOOST_PROTO_DEFINE_UNARY_OPERATOR(OP, TAG, TRAIT, DOMAIN, POST) \ |
201 | template<typename Arg> \ |
202 | BOOST_PROTO_DISABLE_MSVC_C4714 BOOST_FORCEINLINE \ |
203 | typename boost::proto::detail::enable_unary< \ |
204 | DOMAIN \ |
205 | , DOMAIN::proto_grammar \ |
206 | , BOOST_PROTO_APPLY_UNARY_(TRAIT, Arg) \ |
207 | , TAG \ |
208 | , Arg const & \ |
209 | >::type const \ |
210 | operator OP(Arg &&arg BOOST_PROTO_UNARY_OP_IS_POSTFIX_ ## POST) \ |
211 | { \ |
212 | return boost::proto::detail::make_expr_<TAG, DOMAIN, Arg const &>()(arg); \ |
213 | } \ |
214 | /**/ |
215 | |
216 | #define BOOST_PROTO_DEFINE_BINARY_OPERATOR(OP, TAG, TRAIT, DOMAIN) \ |
217 | template<typename Left, typename Right> \ |
218 | BOOST_PROTO_DISABLE_MSVC_C4714 BOOST_FORCEINLINE \ |
219 | typename boost::proto::detail::enable_binary< \ |
220 | DOMAIN \ |
221 | , DOMAIN::proto_grammar \ |
222 | , BOOST_PROTO_APPLY_BINARY_(TRAIT, Left, Right) \ |
223 | , TAG \ |
224 | , Left const & \ |
225 | , Right const & \ |
226 | >::type const \ |
227 | operator OP(Left &&left, Right &&right) \ |
228 | { \ |
229 | return boost::proto::detail::make_expr_<TAG, DOMAIN, Left const &, Right const &>()(left, right);\ |
230 | } \ |
231 | /**/ |
232 | |
233 | #endif |
234 | |
235 | #define BOOST_PROTO_DEFINE_OPERATORS(TRAIT, DOMAIN) \ |
236 | BOOST_PROTO_DEFINE_UNARY_OPERATOR(+, boost::proto::tag::unary_plus, TRAIT, DOMAIN, 0) \ |
237 | BOOST_PROTO_DEFINE_UNARY_OPERATOR(-, boost::proto::tag::negate, TRAIT, DOMAIN, 0) \ |
238 | BOOST_PROTO_DEFINE_UNARY_OPERATOR(*, boost::proto::tag::dereference, TRAIT, DOMAIN, 0) \ |
239 | BOOST_PROTO_DEFINE_UNARY_OPERATOR(~, boost::proto::tag::complement, TRAIT, DOMAIN, 0) \ |
240 | BOOST_PROTO_DEFINE_UNARY_OPERATOR(&, boost::proto::tag::address_of, TRAIT, DOMAIN, 0) \ |
241 | BOOST_PROTO_DEFINE_UNARY_OPERATOR(!, boost::proto::tag::logical_not, TRAIT, DOMAIN, 0) \ |
242 | BOOST_PROTO_DEFINE_UNARY_OPERATOR(++, boost::proto::tag::pre_inc, TRAIT, DOMAIN, 0) \ |
243 | BOOST_PROTO_DEFINE_UNARY_OPERATOR(--, boost::proto::tag::pre_dec, TRAIT, DOMAIN, 0) \ |
244 | BOOST_PROTO_DEFINE_UNARY_OPERATOR(++, boost::proto::tag::post_inc, TRAIT, DOMAIN, 1) \ |
245 | BOOST_PROTO_DEFINE_UNARY_OPERATOR(--, boost::proto::tag::post_dec, TRAIT, DOMAIN, 1) \ |
246 | BOOST_PROTO_DEFINE_BINARY_OPERATOR(<<, boost::proto::tag::shift_left, TRAIT, DOMAIN) \ |
247 | BOOST_PROTO_DEFINE_BINARY_OPERATOR(>>, boost::proto::tag::shift_right, TRAIT, DOMAIN) \ |
248 | BOOST_PROTO_DEFINE_BINARY_OPERATOR(*, boost::proto::tag::multiplies, TRAIT, DOMAIN) \ |
249 | BOOST_PROTO_DEFINE_BINARY_OPERATOR(/, boost::proto::tag::divides, TRAIT, DOMAIN) \ |
250 | BOOST_PROTO_DEFINE_BINARY_OPERATOR(%, boost::proto::tag::modulus, TRAIT, DOMAIN) \ |
251 | BOOST_PROTO_DEFINE_BINARY_OPERATOR(+, boost::proto::tag::plus, TRAIT, DOMAIN) \ |
252 | BOOST_PROTO_DEFINE_BINARY_OPERATOR(-, boost::proto::tag::minus, TRAIT, DOMAIN) \ |
253 | BOOST_PROTO_DEFINE_BINARY_OPERATOR(<, boost::proto::tag::less, TRAIT, DOMAIN) \ |
254 | BOOST_PROTO_DEFINE_BINARY_OPERATOR(>, boost::proto::tag::greater, TRAIT, DOMAIN) \ |
255 | BOOST_PROTO_DEFINE_BINARY_OPERATOR(<=, boost::proto::tag::less_equal, TRAIT, DOMAIN) \ |
256 | BOOST_PROTO_DEFINE_BINARY_OPERATOR(>=, boost::proto::tag::greater_equal, TRAIT, DOMAIN) \ |
257 | BOOST_PROTO_DEFINE_BINARY_OPERATOR(==, boost::proto::tag::equal_to, TRAIT, DOMAIN) \ |
258 | BOOST_PROTO_DEFINE_BINARY_OPERATOR(!=, boost::proto::tag::not_equal_to, TRAIT, DOMAIN) \ |
259 | BOOST_PROTO_DEFINE_BINARY_OPERATOR(||, boost::proto::tag::logical_or, TRAIT, DOMAIN) \ |
260 | BOOST_PROTO_DEFINE_BINARY_OPERATOR(&&, boost::proto::tag::logical_and, TRAIT, DOMAIN) \ |
261 | BOOST_PROTO_DEFINE_BINARY_OPERATOR(&, boost::proto::tag::bitwise_and, TRAIT, DOMAIN) \ |
262 | BOOST_PROTO_DEFINE_BINARY_OPERATOR(|, boost::proto::tag::bitwise_or, TRAIT, DOMAIN) \ |
263 | BOOST_PROTO_DEFINE_BINARY_OPERATOR(^, boost::proto::tag::bitwise_xor, TRAIT, DOMAIN) \ |
264 | BOOST_PROTO_DEFINE_BINARY_OPERATOR(BOOST_PP_COMMA(), boost::proto::tag::comma, TRAIT, DOMAIN) \ |
265 | BOOST_PROTO_DEFINE_BINARY_OPERATOR(->*, boost::proto::tag::mem_ptr, TRAIT, DOMAIN) \ |
266 | BOOST_PROTO_DEFINE_BINARY_OPERATOR(<<=, boost::proto::tag::shift_left_assign, TRAIT, DOMAIN) \ |
267 | BOOST_PROTO_DEFINE_BINARY_OPERATOR(>>=, boost::proto::tag::shift_right_assign, TRAIT, DOMAIN) \ |
268 | BOOST_PROTO_DEFINE_BINARY_OPERATOR(*=, boost::proto::tag::multiplies_assign, TRAIT, DOMAIN) \ |
269 | BOOST_PROTO_DEFINE_BINARY_OPERATOR(/=, boost::proto::tag::divides_assign, TRAIT, DOMAIN) \ |
270 | BOOST_PROTO_DEFINE_BINARY_OPERATOR(%=, boost::proto::tag::modulus_assign, TRAIT, DOMAIN) \ |
271 | BOOST_PROTO_DEFINE_BINARY_OPERATOR(+=, boost::proto::tag::plus_assign, TRAIT, DOMAIN) \ |
272 | BOOST_PROTO_DEFINE_BINARY_OPERATOR(-=, boost::proto::tag::minus_assign, TRAIT, DOMAIN) \ |
273 | BOOST_PROTO_DEFINE_BINARY_OPERATOR(&=, boost::proto::tag::bitwise_and_assign, TRAIT, DOMAIN) \ |
274 | BOOST_PROTO_DEFINE_BINARY_OPERATOR(|=, boost::proto::tag::bitwise_or_assign, TRAIT, DOMAIN) \ |
275 | BOOST_PROTO_DEFINE_BINARY_OPERATOR(^=, boost::proto::tag::bitwise_xor_assign, TRAIT, DOMAIN) \ |
276 | /**/ |
277 | |
278 | // Extensions are a superset of Proto expressions |
279 | template<typename T> |
280 | struct is_extension |
281 | : is_expr<T> |
282 | {}; |
283 | |
284 | template<typename T> |
285 | struct is_extension<T &> |
286 | : is_expr<T> |
287 | {}; |
288 | |
289 | #define BOOST_PROTO_APPLY_UNARY_(TRAIT, ARG) TRAIT<ARG> |
290 | #define BOOST_PROTO_APPLY_BINARY_(TRAIT, LEFT, RIGHT) boost::mpl::or_<TRAIT<LEFT>, TRAIT<RIGHT> > |
291 | |
292 | namespace exprns_ |
293 | { |
294 | // This defines all of Proto's built-in free operator overloads |
295 | BOOST_PROTO_DEFINE_OPERATORS(is_extension, deduce_domain) |
296 | |
297 | // if_else, for the non-overloadable ternary conditional operator ?: |
298 | template<typename A0, typename A1, typename A2> |
299 | BOOST_FORCEINLINE |
300 | typename result_of::make_expr< |
301 | tag::if_else_ |
302 | , deduce_domain |
303 | , A0 const & |
304 | , A1 const & |
305 | , A2 const & |
306 | >::type const |
307 | if_else(A0 const &a0, A1 const &a1, A2 const &a2) |
308 | { |
309 | return proto::detail::make_expr_< |
310 | tag::if_else_ |
311 | , deduce_domain |
312 | , A0 const & |
313 | , A1 const & |
314 | , A2 const & |
315 | >()(a0, a1, a2); |
316 | } |
317 | } |
318 | |
319 | using exprns_::if_else; |
320 | |
321 | #undef BOOST_PROTO_APPLY_UNARY_ |
322 | #undef BOOST_PROTO_APPLY_BINARY_ |
323 | |
324 | // Redefine BOOST_PROTO_APPLY_UNARY_ and BOOST_PROTO_APPLY_BINARY_ so that end users |
325 | // can use BOOST_PROTO_DEFINE_OPERATORS to define Proto operator overloads that work |
326 | // with their own terminal types. |
327 | |
328 | #ifdef BOOST_NO_CXX11_RVALUE_REFERENCES |
329 | |
330 | #define BOOST_PROTO_APPLY_UNARY_(TRAIT, ARG) \ |
331 | boost::mpl::and_< \ |
332 | TRAIT<ARG> \ |
333 | , boost::mpl::not_<boost::proto::is_extension<ARG> > \ |
334 | > \ |
335 | /**/ |
336 | |
337 | #define BOOST_PROTO_APPLY_BINARY_(TRAIT, LEFT, RIGHT) \ |
338 | boost::mpl::and_< \ |
339 | boost::mpl::or_<TRAIT<LEFT>, TRAIT<RIGHT> > \ |
340 | , boost::mpl::not_< \ |
341 | boost::mpl::or_< \ |
342 | boost::proto::is_extension<LEFT> \ |
343 | , boost::proto::is_extension<RIGHT> \ |
344 | > \ |
345 | > \ |
346 | > \ |
347 | /**/ |
348 | |
349 | #else |
350 | |
351 | #define BOOST_PROTO_APPLY_UNARY_(TRAIT, ARG) \ |
352 | boost::mpl::and_< \ |
353 | TRAIT<BOOST_PROTO_UNCVREF(ARG) > \ |
354 | , boost::mpl::not_<boost::proto::is_extension<ARG> > \ |
355 | > \ |
356 | /**/ |
357 | |
358 | #define BOOST_PROTO_APPLY_BINARY_(TRAIT, LEFT, RIGHT) \ |
359 | boost::mpl::and_< \ |
360 | boost::mpl::or_<TRAIT<BOOST_PROTO_UNCVREF(LEFT) >, TRAIT<BOOST_PROTO_UNCVREF(RIGHT) > > \ |
361 | , boost::mpl::not_< \ |
362 | boost::mpl::or_< \ |
363 | boost::proto::is_extension<LEFT> \ |
364 | , boost::proto::is_extension<RIGHT> \ |
365 | > \ |
366 | > \ |
367 | > \ |
368 | /**/ |
369 | |
370 | #endif |
371 | |
372 | }} |
373 | |
374 | #if defined(_MSC_VER) |
375 | # pragma warning(pop) |
376 | #endif |
377 | |
378 | #endif |
379 | |