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(BOOST_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(BOOST_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(BOOST_BORLANDC, BOOST_TESTED_AT(0x610)) \ 59 || (BOOST_MPL_CFG_GCC != 0) || (BOOST_MPL_CFG_GPU != 0) || defined(__PGI) 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 #if defined(BOOST_GCC) && BOOST_GCC >= 80000 188 #define BOOST_MPL_IGNORE_PARENTHESES_WARNING 189 #pragma GCC diagnostic push 190 #pragma GCC diagnostic ignored "-Wparentheses" 191 #endif 192 193 template< typename Pred > 194 failed ************ (Pred::************ 195 assert_arg( void (*)(Pred), typename assert_arg_pred<Pred>::type ) 196 ); 197 198 template< typename Pred > 199 failed ************ (boost::mpl::not_<Pred>::************ 200 assert_not_arg( void (*)(Pred), typename assert_arg_pred_not<Pred>::type ) 201 ); 202 203 #ifdef BOOST_MPL_IGNORE_PARENTHESES_WARNING 204 #undef BOOST_MPL_IGNORE_PARENTHESES_WARNING 205 #pragma GCC diagnostic pop 206 #endif 207 208 template< typename Pred > 209 AUX778076_ASSERT_ARG(assert<false>) 210 assert_arg( void (*)(Pred), typename assert_arg_pred_not<Pred>::type ); 211 212 template< typename Pred > 213 AUX778076_ASSERT_ARG(assert<false>) 214 assert_not_arg( void (*)(Pred), typename assert_arg_pred<Pred>::type ); 215 216 217 #else // BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER 218 219 template< bool c, typename Pred > struct assert_arg_type_impl 220 { 221 typedef failed ************ Pred::* mwcw83_wknd; 222 typedef mwcw83_wknd ************* type; 223 }; 224 225 template< typename Pred > struct assert_arg_type_impl<true,Pred> 226 { 227 typedef AUX778076_ASSERT_ARG(assert<false>) type; 228 }; 229 230 template< typename Pred > struct assert_arg_type 231 : assert_arg_type_impl< BOOST_MPL_AUX_VALUE_WKND(BOOST_MPL_AUX_NESTED_TYPE_WKND(Pred))::value, Pred > 232 { 233 }; 234 235 template< typename Pred > 236 typename assert_arg_type<Pred>::type 237 assert_arg(void (*)(Pred), int); 238 239 template< typename Pred > 240 typename assert_arg_type< boost::mpl::not_<Pred> >::type 241 assert_not_arg(void (*)(Pred), int); 242 243 # if !defined(BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES) 244 template< long x, long y, bool (*r)(failed, failed) > 245 typename assert_arg_type_impl< false,BOOST_MPL_AUX_ASSERT_RELATION(x,y,r) >::type 246 assert_rel_arg( BOOST_MPL_AUX_ASSERT_RELATION(x,y,r) ); 247 # else 248 template< assert_::relations r, long x, long y > 249 typename assert_arg_type_impl< false,assert_relation<r,x,y> >::type 250 assert_rel_arg( assert_relation<r,x,y> ); 251 # endif 252 253 #endif // BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER 254 255 #undef AUX778076_ASSERT_ARG 256 257 BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_CLOSE 258 259 #if BOOST_WORKAROUND(BOOST_MSVC, == 1700) 260 261 // BOOST_MPL_ASSERT((pred<x,...>)) 262 263 #define BOOST_MPL_ASSERT(pred) \ 264 BOOST_MPL_AUX_ASSERT_CONSTANT( \ 265 std::size_t \ 266 , BOOST_PP_CAT(mpl_assertion_in_line_,BOOST_MPL_AUX_PP_COUNTER()) = sizeof( \ 267 boost::mpl::assertion_failed<false>( \ 268 boost::mpl::make_assert_arg< \ 269 typename boost::mpl::eval_assert<void pred>::type \ 270 >() \ 271 ) \ 272 ) \ 273 ) \ 274 /**/ 275 276 // BOOST_MPL_ASSERT_NOT((pred<x,...>)) 277 278 #define BOOST_MPL_ASSERT_NOT(pred) \ 279 BOOST_MPL_AUX_ASSERT_CONSTANT( \ 280 std::size_t \ 281 , BOOST_PP_CAT(mpl_assertion_in_line_,BOOST_MPL_AUX_PP_COUNTER()) = sizeof( \ 282 boost::mpl::assertion_failed<false>( \ 283 boost::mpl::make_assert_arg< \ 284 typename boost::mpl::eval_assert_not<void pred>::type \ 285 >() \ 286 ) \ 287 ) \ 288 ) \ 289 /**/ 290 291 #else 292 293 // BOOST_MPL_ASSERT((pred<x,...>)) 294 295 #define BOOST_MPL_ASSERT(pred) \ 296 BOOST_MPL_AUX_ASSERT_CONSTANT( \ 297 std::size_t \ 298 , BOOST_PP_CAT(mpl_assertion_in_line_,BOOST_MPL_AUX_PP_COUNTER()) = sizeof( \ 299 boost::mpl::assertion_failed<false>( \ 300 boost::mpl::assert_arg( (void (*) pred)0, 1 ) \ 301 ) \ 302 ) \ 303 ) \ 304 /**/ 305 306 // BOOST_MPL_ASSERT_NOT((pred<x,...>)) 307 308 #if BOOST_WORKAROUND(BOOST_MSVC, <= 1300) 309 # define BOOST_MPL_ASSERT_NOT(pred) \ 310 enum { \ 311 BOOST_PP_CAT(mpl_assertion_in_line_,BOOST_MPL_AUX_PP_COUNTER()) = sizeof( \ 312 boost::mpl::assertion<false>::failed( \ 313 boost::mpl::assert_not_arg( (void (*) pred)0, 1 ) \ 314 ) \ 315 ) \ 316 }\ 317 /**/ 318 #else 319 # define BOOST_MPL_ASSERT_NOT(pred) \ 320 BOOST_MPL_AUX_ASSERT_CONSTANT( \ 321 std::size_t \ 322 , BOOST_PP_CAT(mpl_assertion_in_line_,BOOST_MPL_AUX_PP_COUNTER()) = sizeof( \ 323 boost::mpl::assertion_failed<false>( \ 324 boost::mpl::assert_not_arg( (void (*) pred)0, 1 ) \ 325 ) \ 326 ) \ 327 ) \ 328 /**/ 329 #endif 330 331 #endif 332 333 // BOOST_MPL_ASSERT_RELATION(x, ==|!=|<=|<|>=|>, y) 334 335 #if defined(BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES) 336 337 # if !defined(BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER) 338 // agurt, 9/nov/06: 'enum' below is a workaround for gcc 4.0.4/4.1.1 bugs #29522 and #29518 339 # define BOOST_MPL_ASSERT_RELATION_IMPL(counter, x, rel, y) \ 340 enum { BOOST_PP_CAT(mpl_assert_rel_value,counter) = (x rel y) }; \ 341 BOOST_MPL_AUX_ASSERT_CONSTANT( \ 342 std::size_t \ 343 , BOOST_PP_CAT(mpl_assertion_in_line_,counter) = sizeof( \ 344 boost::mpl::assertion_failed<BOOST_PP_CAT(mpl_assert_rel_value,counter)>( \ 345 (boost::mpl::failed ************ ( boost::mpl::assert_relation< \ 346 boost::mpl::assert_::relations( sizeof( \ 347 boost::mpl::assert_::arg rel boost::mpl::assert_::arg \ 348 ) ) \ 349 , x \ 350 , y \ 351 >::************)) 0 ) \ 352 ) \ 353 ) \ 354 /**/ 355 # else 356 # define BOOST_MPL_ASSERT_RELATION_IMPL(counter, x, rel, y) \ 357 BOOST_MPL_AUX_ASSERT_CONSTANT( \ 358 std::size_t \ 359 , BOOST_PP_CAT(mpl_assert_rel,counter) = sizeof( \ 360 boost::mpl::assert_::arg rel boost::mpl::assert_::arg \ 361 ) \ 362 ); \ 363 BOOST_MPL_AUX_ASSERT_CONSTANT( bool, BOOST_PP_CAT(mpl_assert_rel_value,counter) = (x rel y) ); \ 364 BOOST_MPL_AUX_ASSERT_CONSTANT( \ 365 std::size_t \ 366 , BOOST_PP_CAT(mpl_assertion_in_line_,counter) = sizeof( \ 367 boost::mpl::assertion_failed<BOOST_PP_CAT(mpl_assert_rel_value,counter)>( \ 368 boost::mpl::assert_rel_arg( boost::mpl::assert_relation< \ 369 boost::mpl::assert_::relations(BOOST_PP_CAT(mpl_assert_rel,counter)) \ 370 , x \ 371 , y \ 372 >() ) \ 373 ) \ 374 ) \ 375 ) \ 376 /**/ 377 # endif 378 379 # define BOOST_MPL_ASSERT_RELATION(x, rel, y) \ 380 BOOST_MPL_ASSERT_RELATION_IMPL(BOOST_MPL_AUX_PP_COUNTER(), x, rel, y) \ 381 /**/ 382 383 #else // !BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES 384 385 # if defined(BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER) 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::assert_rel_arg( \ 391 boost::mpl::BOOST_MPL_AUX_ASSERT_RELATION(x,y,(&boost::mpl::operator rel))() \ 392 ) ) \ 393 ) \ 394 ) \ 395 /**/ 396 # else 397 # define BOOST_MPL_ASSERT_RELATION(x, rel, y) \ 398 BOOST_MPL_AUX_ASSERT_CONSTANT( \ 399 std::size_t \ 400 , BOOST_PP_CAT(mpl_assertion_in_line_,BOOST_MPL_AUX_PP_COUNTER()) = sizeof( \ 401 boost::mpl::assertion_failed<(x rel y)>( (boost::mpl::failed ************ ( \ 402 boost::mpl::BOOST_MPL_AUX_ASSERT_RELATION(x,y,(&boost::mpl::operator rel))::************))0 ) \ 403 ) \ 404 ) \ 405 /**/ 406 # endif 407 408 #endif 409 410 411 // BOOST_MPL_ASSERT_MSG( (pred<x,...>::value), USER_PROVIDED_MESSAGE, (types<x,...>) ) 412 413 #if BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3202)) 414 # define BOOST_MPL_ASSERT_MSG_IMPL( counter, c, msg, types_ ) \ 415 struct msg; \ 416 typedef struct BOOST_PP_CAT(msg,counter) : boost::mpl::assert_ \ 417 { \ 418 using boost::mpl::assert_::types; \ 419 static boost::mpl::failed ************ (msg::************ assert_arg()) types_ \ 420 { return 0; } \ 421 } BOOST_PP_CAT(mpl_assert_arg,counter); \ 422 BOOST_MPL_AUX_ASSERT_CONSTANT( \ 423 std::size_t \ 424 , BOOST_PP_CAT(mpl_assertion_in_line_,counter) = sizeof( \ 425 boost::mpl::assertion<(c)>::failed( BOOST_PP_CAT(mpl_assert_arg,counter)::assert_arg() ) \ 426 ) \ 427 ) \ 428 /**/ 429 #else 430 # define BOOST_MPL_ASSERT_MSG_IMPL( counter, c, msg, types_ ) \ 431 struct msg; \ 432 typedef struct BOOST_PP_CAT(msg,counter) : boost::mpl::assert_ \ 433 { \ 434 static boost::mpl::failed ************ (msg::************ assert_arg()) types_ \ 435 { return 0; } \ 436 } BOOST_PP_CAT(mpl_assert_arg,counter); \ 437 BOOST_MPL_AUX_ASSERT_CONSTANT( \ 438 std::size_t \ 439 , BOOST_PP_CAT(mpl_assertion_in_line_,counter) = sizeof( \ 440 boost::mpl::assertion_failed<(c)>( BOOST_PP_CAT(mpl_assert_arg,counter)::assert_arg() ) \ 441 ) \ 442 ) \ 443 /**/ 444 #endif 445 446 #if 0 447 // Work around BOOST_MPL_ASSERT_MSG_IMPL generating multiple definition linker errors on VC++8. 448 // #if defined(BOOST_MSVC) && BOOST_MSVC < 1500 449 # include <boost/static_assert.hpp> 450 # define BOOST_MPL_ASSERT_MSG( c, msg, types_ ) \ 451 BOOST_STATIC_ASSERT_MSG( c, #msg ) \ 452 /**/ 453 #else 454 # define BOOST_MPL_ASSERT_MSG( c, msg, types_ ) \ 455 BOOST_MPL_ASSERT_MSG_IMPL( BOOST_MPL_AUX_PP_COUNTER(), c, msg, types_ ) \ 456 /**/ 457 #endif 458 459 #endif // BOOST_MPL_ASSERT_HPP_INCLUDED 460