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1 | |
2 | #ifndef BOOST_MPL_ASSERT_HPP_INCLUDED | |
3 | #define BOOST_MPL_ASSERT_HPP_INCLUDED | |
4 | ||
5 | // Copyright Aleksey Gurtovoy 2000-2006 | |
6 | // | |
7 | // Distributed under the Boost Software License, Version 1.0. | |
8 | // (See accompanying file LICENSE_1_0.txt or copy at | |
9 | // http://www.boost.org/LICENSE_1_0.txt) | |
10 | // | |
11 | // See http://www.boost.org/libs/mpl for documentation. | |
12 | ||
13 | // $Id$ | |
14 | // $Date$ | |
15 | // $Revision$ | |
16 | ||
17 | #include <boost/mpl/not.hpp> | |
18 | #include <boost/mpl/aux_/value_wknd.hpp> | |
19 | #include <boost/mpl/aux_/nested_type_wknd.hpp> | |
20 | #include <boost/mpl/aux_/yes_no.hpp> | |
21 | #include <boost/mpl/aux_/na.hpp> | |
22 | #include <boost/mpl/aux_/adl_barrier.hpp> | |
23 | ||
24 | #include <boost/mpl/aux_/config/nttp.hpp> | |
25 | #include <boost/mpl/aux_/config/dtp.hpp> | |
26 | #include <boost/mpl/aux_/config/gcc.hpp> | |
27 | #include <boost/mpl/aux_/config/msvc.hpp> | |
28 | #include <boost/mpl/aux_/config/gpu.hpp> | |
29 | #include <boost/mpl/aux_/config/static_constant.hpp> | |
30 | #include <boost/mpl/aux_/config/pp_counter.hpp> | |
31 | #include <boost/mpl/aux_/config/workaround.hpp> | |
32 | ||
33 | #include <boost/preprocessor/cat.hpp> | |
34 | ||
35 | #include <boost/config.hpp> // make sure 'size_t' is placed into 'std' | |
36 | #include <cstddef> | |
37 | ||
38 | #if BOOST_WORKAROUND(BOOST_MSVC, == 1700) | |
39 | #include <boost/mpl/if.hpp> | |
40 | #endif | |
41 | ||
42 | #if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x610)) \ | |
43 | || (BOOST_MPL_CFG_GCC != 0) \ | |
44 | || BOOST_WORKAROUND(__IBMCPP__, <= 600) | |
45 | # define BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES | |
46 | #endif | |
47 | ||
48 | #if BOOST_WORKAROUND(__MWERKS__, < 0x3202) \ | |
49 | || BOOST_WORKAROUND(__EDG_VERSION__, <= 238) \ | |
50 | || BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x610)) \ | |
51 | || BOOST_WORKAROUND(__DMC__, BOOST_TESTED_AT(0x840)) | |
52 | # define BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER | |
53 | #endif | |
54 | ||
55 | // agurt, 10/nov/06: use enums for Borland (which cannot cope with static constants) | |
56 | // and GCC (which issues "unused variable" warnings when static constants are used | |
57 | // at a function scope) | |
58 | #if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x610)) \ | |
59 | || (BOOST_MPL_CFG_GCC != 0) || (BOOST_MPL_CFG_GPU != 0) | |
60 | # define BOOST_MPL_AUX_ASSERT_CONSTANT(T, expr) enum { expr } | |
61 | #else | |
62 | # define BOOST_MPL_AUX_ASSERT_CONSTANT(T, expr) BOOST_STATIC_CONSTANT(T, expr) | |
63 | #endif | |
64 | ||
65 | ||
66 | BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_OPEN | |
67 | ||
68 | struct failed {}; | |
69 | ||
70 | // agurt, 24/aug/04: MSVC 7.1 workaround here and below: return/accept | |
71 | // 'assert<false>' by reference; can't apply it unconditionally -- apparently it | |
72 | // degrades the quality of GCC diagnostics | |
73 | #if BOOST_WORKAROUND(BOOST_MSVC, == 1310) | |
74 | # define AUX778076_ASSERT_ARG(x) x& | |
75 | #else | |
76 | # define AUX778076_ASSERT_ARG(x) x | |
77 | #endif | |
78 | ||
79 | template< bool C > struct assert { typedef void* type; }; | |
80 | template<> struct assert<false> { typedef AUX778076_ASSERT_ARG(assert) type; }; | |
81 | ||
82 | template< bool C > | |
83 | int assertion_failed( typename assert<C>::type ); | |
84 | ||
85 | template< bool C > | |
86 | struct assertion | |
87 | { | |
88 | static int failed( assert<false> ); | |
89 | }; | |
90 | ||
91 | template<> | |
92 | struct assertion<true> | |
93 | { | |
94 | static int failed( void* ); | |
95 | }; | |
96 | ||
97 | struct assert_ | |
98 | { | |
99 | #if !defined(BOOST_MPL_CFG_NO_DEFAULT_PARAMETERS_IN_NESTED_TEMPLATES) | |
100 | template< typename T1, typename T2 = na, typename T3 = na, typename T4 = na > struct types {}; | |
101 | #endif | |
102 | static assert_ const arg; | |
103 | enum relations { equal = 1, not_equal, greater, greater_equal, less, less_equal }; | |
104 | }; | |
105 | ||
106 | ||
107 | #if !defined(BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES) | |
108 | ||
109 | bool operator==( failed, failed ); | |
110 | bool operator!=( failed, failed ); | |
111 | bool operator>( failed, failed ); | |
112 | bool operator>=( failed, failed ); | |
113 | bool operator<( failed, failed ); | |
114 | bool operator<=( failed, failed ); | |
115 | ||
116 | #if defined(__EDG_VERSION__) | |
117 | template< bool (*)(failed, failed), long x, long y > struct assert_relation {}; | |
118 | # define BOOST_MPL_AUX_ASSERT_RELATION(x, y, r) assert_relation<r,x,y> | |
119 | #else | |
120 | template< BOOST_MPL_AUX_NTTP_DECL(long, x), BOOST_MPL_AUX_NTTP_DECL(long, y), bool (*)(failed, failed) > | |
121 | struct assert_relation {}; | |
122 | # define BOOST_MPL_AUX_ASSERT_RELATION(x, y, r) assert_relation<x,y,r> | |
123 | #endif | |
124 | ||
125 | #else // BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES | |
126 | ||
127 | boost::mpl::aux::weighted_tag<1>::type operator==( assert_, assert_ ); | |
128 | boost::mpl::aux::weighted_tag<2>::type operator!=( assert_, assert_ ); | |
129 | boost::mpl::aux::weighted_tag<3>::type operator>( assert_, assert_ ); | |
130 | boost::mpl::aux::weighted_tag<4>::type operator>=( assert_, assert_ ); | |
131 | boost::mpl::aux::weighted_tag<5>::type operator<( assert_, assert_ ); | |
132 | boost::mpl::aux::weighted_tag<6>::type operator<=( assert_, assert_ ); | |
133 | ||
134 | template< assert_::relations r, long x, long y > struct assert_relation {}; | |
135 | ||
136 | #endif | |
137 | ||
138 | #if BOOST_WORKAROUND(BOOST_MSVC, == 1700) | |
139 | ||
140 | template<class Pred> | |
141 | struct extract_assert_pred; | |
142 | ||
143 | template<class Pred> | |
144 | struct extract_assert_pred<void(Pred)> { typedef Pred type; }; | |
145 | ||
146 | template<class Pred> | |
147 | struct eval_assert { | |
148 | typedef typename extract_assert_pred<Pred>::type P; | |
149 | typedef typename P::type p_type; | |
150 | typedef typename ::boost::mpl::if_c<p_type::value, | |
151 | AUX778076_ASSERT_ARG(assert<false>), | |
152 | failed ************ P::************ | |
153 | >::type type; | |
154 | }; | |
155 | ||
156 | template<class Pred> | |
157 | struct eval_assert_not { | |
158 | typedef typename extract_assert_pred<Pred>::type P; | |
159 | typedef typename P::type p_type; | |
160 | typedef typename ::boost::mpl::if_c<!p_type::value, | |
161 | AUX778076_ASSERT_ARG(assert<false>), | |
162 | failed ************ ::boost::mpl::not_<P>::************ | |
163 | >::type type; | |
164 | }; | |
165 | ||
166 | template< typename T > | |
167 | T make_assert_arg(); | |
168 | ||
169 | #elif !defined(BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER) | |
170 | ||
171 | template< bool > struct assert_arg_pred_impl { typedef int type; }; | |
172 | template<> struct assert_arg_pred_impl<true> { typedef void* type; }; | |
173 | ||
174 | template< typename P > struct assert_arg_pred | |
175 | { | |
176 | typedef typename P::type p_type; | |
177 | typedef typename assert_arg_pred_impl< p_type::value >::type type; | |
178 | }; | |
179 | ||
180 | template< typename P > struct assert_arg_pred_not | |
181 | { | |
182 | typedef typename P::type p_type; | |
183 | BOOST_MPL_AUX_ASSERT_CONSTANT( bool, p = !p_type::value ); | |
184 | typedef typename assert_arg_pred_impl<p>::type type; | |
185 | }; | |
186 | ||
187 | template< typename Pred > | |
188 | failed ************ (Pred::************ | |
189 | assert_arg( void (*)(Pred), typename assert_arg_pred<Pred>::type ) | |
190 | ); | |
191 | ||
192 | template< typename Pred > | |
193 | failed ************ (boost::mpl::not_<Pred>::************ | |
194 | assert_not_arg( void (*)(Pred), typename assert_arg_pred_not<Pred>::type ) | |
195 | ); | |
196 | ||
197 | template< typename Pred > | |
198 | AUX778076_ASSERT_ARG(assert<false>) | |
199 | assert_arg( void (*)(Pred), typename assert_arg_pred_not<Pred>::type ); | |
200 | ||
201 | template< typename Pred > | |
202 | AUX778076_ASSERT_ARG(assert<false>) | |
203 | assert_not_arg( void (*)(Pred), typename assert_arg_pred<Pred>::type ); | |
204 | ||
205 | ||
206 | #else // BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER | |
207 | ||
208 | template< bool c, typename Pred > struct assert_arg_type_impl | |
209 | { | |
210 | typedef failed ************ Pred::* mwcw83_wknd; | |
211 | typedef mwcw83_wknd ************* type; | |
212 | }; | |
213 | ||
214 | template< typename Pred > struct assert_arg_type_impl<true,Pred> | |
215 | { | |
216 | typedef AUX778076_ASSERT_ARG(assert<false>) type; | |
217 | }; | |
218 | ||
219 | template< typename Pred > struct assert_arg_type | |
220 | : assert_arg_type_impl< BOOST_MPL_AUX_VALUE_WKND(BOOST_MPL_AUX_NESTED_TYPE_WKND(Pred))::value, Pred > | |
221 | { | |
222 | }; | |
223 | ||
224 | template< typename Pred > | |
225 | typename assert_arg_type<Pred>::type | |
226 | assert_arg(void (*)(Pred), int); | |
227 | ||
228 | template< typename Pred > | |
229 | typename assert_arg_type< boost::mpl::not_<Pred> >::type | |
230 | assert_not_arg(void (*)(Pred), int); | |
231 | ||
232 | # if !defined(BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES) | |
233 | template< long x, long y, bool (*r)(failed, failed) > | |
234 | typename assert_arg_type_impl< false,BOOST_MPL_AUX_ASSERT_RELATION(x,y,r) >::type | |
235 | assert_rel_arg( BOOST_MPL_AUX_ASSERT_RELATION(x,y,r) ); | |
236 | # else | |
237 | template< assert_::relations r, long x, long y > | |
238 | typename assert_arg_type_impl< false,assert_relation<r,x,y> >::type | |
239 | assert_rel_arg( assert_relation<r,x,y> ); | |
240 | # endif | |
241 | ||
242 | #endif // BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER | |
243 | ||
244 | #undef AUX778076_ASSERT_ARG | |
245 | ||
246 | BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_CLOSE | |
247 | ||
248 | #if BOOST_WORKAROUND(BOOST_MSVC, == 1700) | |
249 | ||
250 | // BOOST_MPL_ASSERT((pred<x,...>)) | |
251 | ||
252 | #define BOOST_MPL_ASSERT(pred) \ | |
253 | BOOST_MPL_AUX_ASSERT_CONSTANT( \ | |
254 | std::size_t \ | |
255 | , BOOST_PP_CAT(mpl_assertion_in_line_,BOOST_MPL_AUX_PP_COUNTER()) = sizeof( \ | |
256 | boost::mpl::assertion_failed<false>( \ | |
257 | boost::mpl::make_assert_arg< \ | |
258 | typename boost::mpl::eval_assert<void pred>::type \ | |
259 | >() \ | |
260 | ) \ | |
261 | ) \ | |
262 | ) \ | |
263 | /**/ | |
264 | ||
265 | // BOOST_MPL_ASSERT_NOT((pred<x,...>)) | |
266 | ||
267 | #define BOOST_MPL_ASSERT_NOT(pred) \ | |
268 | BOOST_MPL_AUX_ASSERT_CONSTANT( \ | |
269 | std::size_t \ | |
270 | , BOOST_PP_CAT(mpl_assertion_in_line_,BOOST_MPL_AUX_PP_COUNTER()) = sizeof( \ | |
271 | boost::mpl::assertion_failed<false>( \ | |
272 | boost::mpl::make_assert_arg< \ | |
273 | typename boost::mpl::eval_assert_not<void pred>::type \ | |
274 | >() \ | |
275 | ) \ | |
276 | ) \ | |
277 | ) \ | |
278 | /**/ | |
279 | ||
280 | #else | |
281 | ||
282 | // BOOST_MPL_ASSERT((pred<x,...>)) | |
283 | ||
284 | #define BOOST_MPL_ASSERT(pred) \ | |
285 | BOOST_MPL_AUX_ASSERT_CONSTANT( \ | |
286 | std::size_t \ | |
287 | , BOOST_PP_CAT(mpl_assertion_in_line_,BOOST_MPL_AUX_PP_COUNTER()) = sizeof( \ | |
288 | boost::mpl::assertion_failed<false>( \ | |
289 | boost::mpl::assert_arg( (void (*) pred)0, 1 ) \ | |
290 | ) \ | |
291 | ) \ | |
292 | ) \ | |
293 | /**/ | |
294 | ||
295 | // BOOST_MPL_ASSERT_NOT((pred<x,...>)) | |
296 | ||
297 | #if BOOST_WORKAROUND(BOOST_MSVC, <= 1300) | |
298 | # define BOOST_MPL_ASSERT_NOT(pred) \ | |
299 | enum { \ | |
300 | BOOST_PP_CAT(mpl_assertion_in_line_,BOOST_MPL_AUX_PP_COUNTER()) = sizeof( \ | |
301 | boost::mpl::assertion<false>::failed( \ | |
302 | boost::mpl::assert_not_arg( (void (*) pred)0, 1 ) \ | |
303 | ) \ | |
304 | ) \ | |
305 | }\ | |
306 | /**/ | |
307 | #else | |
308 | # define BOOST_MPL_ASSERT_NOT(pred) \ | |
309 | BOOST_MPL_AUX_ASSERT_CONSTANT( \ | |
310 | std::size_t \ | |
311 | , BOOST_PP_CAT(mpl_assertion_in_line_,BOOST_MPL_AUX_PP_COUNTER()) = sizeof( \ | |
312 | boost::mpl::assertion_failed<false>( \ | |
313 | boost::mpl::assert_not_arg( (void (*) pred)0, 1 ) \ | |
314 | ) \ | |
315 | ) \ | |
316 | ) \ | |
317 | /**/ | |
318 | #endif | |
319 | ||
320 | #endif | |
321 | ||
322 | // BOOST_MPL_ASSERT_RELATION(x, ==|!=|<=|<|>=|>, y) | |
323 | ||
324 | #if defined(BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES) | |
325 | ||
326 | # if !defined(BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER) | |
327 | // agurt, 9/nov/06: 'enum' below is a workaround for gcc 4.0.4/4.1.1 bugs #29522 and #29518 | |
328 | # define BOOST_MPL_ASSERT_RELATION_IMPL(counter, x, rel, y) \ | |
329 | enum { BOOST_PP_CAT(mpl_assert_rel_value,counter) = (x rel y) }; \ | |
330 | BOOST_MPL_AUX_ASSERT_CONSTANT( \ | |
331 | std::size_t \ | |
332 | , BOOST_PP_CAT(mpl_assertion_in_line_,counter) = sizeof( \ | |
333 | boost::mpl::assertion_failed<BOOST_PP_CAT(mpl_assert_rel_value,counter)>( \ | |
334 | (boost::mpl::failed ************ ( boost::mpl::assert_relation< \ | |
335 | boost::mpl::assert_::relations( sizeof( \ | |
336 | boost::mpl::assert_::arg rel boost::mpl::assert_::arg \ | |
337 | ) ) \ | |
338 | , x \ | |
339 | , y \ | |
340 | >::************)) 0 ) \ | |
341 | ) \ | |
342 | ) \ | |
343 | /**/ | |
344 | # else | |
345 | # define BOOST_MPL_ASSERT_RELATION_IMPL(counter, x, rel, y) \ | |
346 | BOOST_MPL_AUX_ASSERT_CONSTANT( \ | |
347 | std::size_t \ | |
348 | , BOOST_PP_CAT(mpl_assert_rel,counter) = sizeof( \ | |
349 | boost::mpl::assert_::arg rel boost::mpl::assert_::arg \ | |
350 | ) \ | |
351 | ); \ | |
352 | BOOST_MPL_AUX_ASSERT_CONSTANT( bool, BOOST_PP_CAT(mpl_assert_rel_value,counter) = (x rel y) ); \ | |
353 | BOOST_MPL_AUX_ASSERT_CONSTANT( \ | |
354 | std::size_t \ | |
355 | , BOOST_PP_CAT(mpl_assertion_in_line_,counter) = sizeof( \ | |
356 | boost::mpl::assertion_failed<BOOST_PP_CAT(mpl_assert_rel_value,counter)>( \ | |
357 | boost::mpl::assert_rel_arg( boost::mpl::assert_relation< \ | |
358 | boost::mpl::assert_::relations(BOOST_PP_CAT(mpl_assert_rel,counter)) \ | |
359 | , x \ | |
360 | , y \ | |
361 | >() ) \ | |
362 | ) \ | |
363 | ) \ | |
364 | ) \ | |
365 | /**/ | |
366 | # endif | |
367 | ||
368 | # define BOOST_MPL_ASSERT_RELATION(x, rel, y) \ | |
369 | BOOST_MPL_ASSERT_RELATION_IMPL(BOOST_MPL_AUX_PP_COUNTER(), x, rel, y) \ | |
370 | /**/ | |
371 | ||
372 | #else // !BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES | |
373 | ||
374 | # if defined(BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER) | |
375 | # define BOOST_MPL_ASSERT_RELATION(x, rel, y) \ | |
376 | BOOST_MPL_AUX_ASSERT_CONSTANT( \ | |
377 | std::size_t \ | |
378 | , BOOST_PP_CAT(mpl_assertion_in_line_,BOOST_MPL_AUX_PP_COUNTER()) = sizeof( \ | |
379 | boost::mpl::assertion_failed<(x rel y)>( boost::mpl::assert_rel_arg( \ | |
380 | boost::mpl::BOOST_MPL_AUX_ASSERT_RELATION(x,y,(&boost::mpl::operator rel))() \ | |
381 | ) ) \ | |
382 | ) \ | |
383 | ) \ | |
384 | /**/ | |
385 | # else | |
386 | # define BOOST_MPL_ASSERT_RELATION(x, rel, y) \ | |
387 | BOOST_MPL_AUX_ASSERT_CONSTANT( \ | |
388 | std::size_t \ | |
389 | , BOOST_PP_CAT(mpl_assertion_in_line_,BOOST_MPL_AUX_PP_COUNTER()) = sizeof( \ | |
390 | boost::mpl::assertion_failed<(x rel y)>( (boost::mpl::failed ************ ( \ | |
391 | boost::mpl::BOOST_MPL_AUX_ASSERT_RELATION(x,y,(&boost::mpl::operator rel))::************))0 ) \ | |
392 | ) \ | |
393 | ) \ | |
394 | /**/ | |
395 | # endif | |
396 | ||
397 | #endif | |
398 | ||
399 | ||
400 | // BOOST_MPL_ASSERT_MSG( (pred<x,...>::value), USER_PROVIDED_MESSAGE, (types<x,...>) ) | |
401 | ||
402 | #if BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3202)) | |
403 | # define BOOST_MPL_ASSERT_MSG_IMPL( counter, c, msg, types_ ) \ | |
404 | struct msg; \ | |
405 | typedef struct BOOST_PP_CAT(msg,counter) : boost::mpl::assert_ \ | |
406 | { \ | |
407 | using boost::mpl::assert_::types; \ | |
408 | static boost::mpl::failed ************ (msg::************ assert_arg()) types_ \ | |
409 | { return 0; } \ | |
410 | } BOOST_PP_CAT(mpl_assert_arg,counter); \ | |
411 | BOOST_MPL_AUX_ASSERT_CONSTANT( \ | |
412 | std::size_t \ | |
413 | , BOOST_PP_CAT(mpl_assertion_in_line_,counter) = sizeof( \ | |
414 | boost::mpl::assertion<(c)>::failed( BOOST_PP_CAT(mpl_assert_arg,counter)::assert_arg() ) \ | |
415 | ) \ | |
416 | ) \ | |
417 | /**/ | |
418 | #else | |
419 | # define BOOST_MPL_ASSERT_MSG_IMPL( counter, c, msg, types_ ) \ | |
420 | struct msg; \ | |
421 | typedef struct BOOST_PP_CAT(msg,counter) : boost::mpl::assert_ \ | |
422 | { \ | |
423 | static boost::mpl::failed ************ (msg::************ assert_arg()) types_ \ | |
424 | { return 0; } \ | |
425 | } BOOST_PP_CAT(mpl_assert_arg,counter); \ | |
426 | BOOST_MPL_AUX_ASSERT_CONSTANT( \ | |
427 | std::size_t \ | |
428 | , BOOST_PP_CAT(mpl_assertion_in_line_,counter) = sizeof( \ | |
429 | boost::mpl::assertion_failed<(c)>( BOOST_PP_CAT(mpl_assert_arg,counter)::assert_arg() ) \ | |
430 | ) \ | |
431 | ) \ | |
432 | /**/ | |
433 | #endif | |
434 | ||
435 | #define BOOST_MPL_ASSERT_MSG( c, msg, types_ ) \ | |
436 | BOOST_MPL_ASSERT_MSG_IMPL( BOOST_MPL_AUX_PP_COUNTER(), c, msg, types_ ) \ | |
437 | /**/ | |
438 | ||
439 | #endif // BOOST_MPL_ASSERT_HPP_INCLUDED |