ceph/src/boost/boost/mpl/assert.hpp

   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) || 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