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: assert.hpp 49267 2008-10-11 06:19:02Z agurtovoy $ 14// $Date: 2008-10-10 23:19:02 -0700 (Fri, 10 Oct 2008) $ 15// $Revision: 49267 $ 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/static_constant.hpp> 29#include <boost/mpl/aux_/config/pp_counter.hpp> 30#include <boost/mpl/aux_/config/workaround.hpp> 31 32#include <boost/preprocessor/cat.hpp> 33 34#include <boost/config.hpp> // make sure 'size_t' is placed into 'std' 35#include <cstddef> 36 37 38#if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x610)) \ 39 || (BOOST_MPL_CFG_GCC != 0) \ 40 || BOOST_WORKAROUND(__IBMCPP__, <= 600) 41# define BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES 42#endif 43 44#if BOOST_WORKAROUND(__MWERKS__, < 0x3202) \ 45 || BOOST_WORKAROUND(__EDG_VERSION__, <= 238) \ 46 || BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x610)) \ 47 || BOOST_WORKAROUND(__DMC__, BOOST_TESTED_AT(0x840)) 48# define BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER 49#endif 50 51// agurt, 10/nov/06: use enums for Borland (which cannot cope with static constants) 52// and GCC (which issues "unused variable" warnings when static constants are used 53// at a function scope) 54#if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x610)) \ 55 || (BOOST_MPL_CFG_GCC != 0) 56# define BOOST_MPL_AUX_ASSERT_CONSTANT(T, expr) enum { expr } 57#else 58# define BOOST_MPL_AUX_ASSERT_CONSTANT(T, expr) BOOST_STATIC_CONSTANT(T, expr) 59#endif 60 61 62BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_OPEN 63 64struct failed {}; 65 66// agurt, 24/aug/04: MSVC 7.1 workaround here and below: return/accept 67// 'assert<false>' by reference; can't apply it unconditionally -- apparently it 68// degrades the quality of GCC diagnostics 69#if BOOST_WORKAROUND(BOOST_MSVC, == 1310) 70# define AUX778076_ASSERT_ARG(x) x& 71#else 72# define AUX778076_ASSERT_ARG(x) x 73#endif 74 75template< bool C > struct assert { typedef void* type; }; 76template<> struct assert<false> { typedef AUX778076_ASSERT_ARG(assert) type; }; 77 78template< bool C > 79int assertion_failed( typename assert<C>::type ); 80 81template< bool C > 82struct assertion 83{ 84 static int failed( assert<false> ); 85}; 86 87template<> 88struct assertion<true> 89{ 90 static int failed( void* ); 91}; 92 93struct assert_ 94{ 95#if !defined(BOOST_MPL_CFG_NO_DEFAULT_PARAMETERS_IN_NESTED_TEMPLATES) 96 template< typename T1, typename T2 = na, typename T3 = na, typename T4 = na > struct types {}; 97#endif 98 static assert_ const arg; 99 enum relations { equal = 1, not_equal, greater, greater_equal, less, less_equal }; 100}; 101 102 103#if !defined(BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES) 104 105bool operator==( failed, failed ); 106bool operator!=( failed, failed ); 107bool operator>( failed, failed ); 108bool operator>=( failed, failed ); 109bool operator<( failed, failed ); 110bool operator<=( failed, failed ); 111 112#if defined(__EDG_VERSION__) 113template< bool (*)(failed, failed), long x, long y > struct assert_relation {}; 114# define BOOST_MPL_AUX_ASSERT_RELATION(x, y, r) assert_relation<r,x,y> 115#else 116template< BOOST_MPL_AUX_NTTP_DECL(long, x), BOOST_MPL_AUX_NTTP_DECL(long, y), bool (*)(failed, failed) > 117struct assert_relation {}; 118# define BOOST_MPL_AUX_ASSERT_RELATION(x, y, r) assert_relation<x,y,r> 119#endif 120 121#else // BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES 122 123boost::mpl::aux::weighted_tag<1>::type operator==( assert_, assert_ ); 124boost::mpl::aux::weighted_tag<2>::type operator!=( assert_, assert_ ); 125boost::mpl::aux::weighted_tag<3>::type operator>( assert_, assert_ ); 126boost::mpl::aux::weighted_tag<4>::type operator>=( assert_, assert_ ); 127boost::mpl::aux::weighted_tag<5>::type operator<( assert_, assert_ ); 128boost::mpl::aux::weighted_tag<6>::type operator<=( assert_, assert_ ); 129 130template< assert_::relations r, long x, long y > struct assert_relation {}; 131 132#endif 133 134 135#if !defined(BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER) 136 137template< bool > struct assert_arg_pred_impl { typedef int type; }; 138template<> struct assert_arg_pred_impl<true> { typedef void* type; }; 139 140template< typename P > struct assert_arg_pred 141{ 142 typedef typename P::type p_type; 143 typedef typename assert_arg_pred_impl< p_type::value >::type type; 144}; 145 146template< typename P > struct assert_arg_pred_not 147{ 148 typedef typename P::type p_type; 149 BOOST_MPL_AUX_ASSERT_CONSTANT( bool, p = !p_type::value ); 150 typedef typename assert_arg_pred_impl<p>::type type; 151}; 152 153template< typename Pred > 154failed ************ (Pred::************ 155 assert_arg( void (*)(Pred), typename assert_arg_pred<Pred>::type ) 156 ); 157 158template< typename Pred > 159failed ************ (boost::mpl::not_<Pred>::************ 160 assert_not_arg( void (*)(Pred), typename assert_arg_pred_not<Pred>::type ) 161 ); 162 163template< typename Pred > 164AUX778076_ASSERT_ARG(assert<false>) 165assert_arg( void (*)(Pred), typename assert_arg_pred_not<Pred>::type ); 166 167template< typename Pred > 168AUX778076_ASSERT_ARG(assert<false>) 169assert_not_arg( void (*)(Pred), typename assert_arg_pred<Pred>::type ); 170 171 172#else // BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER 173 174template< bool c, typename Pred > struct assert_arg_type_impl 175{ 176 typedef failed ************ Pred::* mwcw83_wknd; 177 typedef mwcw83_wknd ************* type; 178}; 179 180template< typename Pred > struct assert_arg_type_impl<true,Pred> 181{ 182 typedef AUX778076_ASSERT_ARG(assert<false>) type; 183}; 184 185template< typename Pred > struct assert_arg_type 186 : assert_arg_type_impl< BOOST_MPL_AUX_VALUE_WKND(BOOST_MPL_AUX_NESTED_TYPE_WKND(Pred))::value, Pred > 187{ 188}; 189 190template< typename Pred > 191typename assert_arg_type<Pred>::type 192assert_arg(void (*)(Pred), int); 193 194template< typename Pred > 195typename assert_arg_type< boost::mpl::not_<Pred> >::type 196assert_not_arg(void (*)(Pred), int); 197 198# if !defined(BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES) 199template< long x, long y, bool (*r)(failed, failed) > 200typename assert_arg_type_impl< false,BOOST_MPL_AUX_ASSERT_RELATION(x,y,r) >::type 201assert_rel_arg( BOOST_MPL_AUX_ASSERT_RELATION(x,y,r) ); 202# else 203template< assert_::relations r, long x, long y > 204typename assert_arg_type_impl< false,assert_relation<r,x,y> >::type 205assert_rel_arg( assert_relation<r,x,y> ); 206# endif 207 208#endif // BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER 209 210#undef AUX778076_ASSERT_ARG 211 212BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_CLOSE 213 214 215// BOOST_MPL_ASSERT((pred<x,...>)) 216 217#define BOOST_MPL_ASSERT(pred) \ 218BOOST_MPL_AUX_ASSERT_CONSTANT( \ 219 std::size_t \ 220 , BOOST_PP_CAT(mpl_assertion_in_line_,BOOST_MPL_AUX_PP_COUNTER()) = sizeof( \ 221 boost::mpl::assertion_failed<false>( \ 222 boost::mpl::assert_arg( (void (*) pred)0, 1 ) \ 223 ) \ 224 ) \ 225 ) \ 226/**/ 227 228// BOOST_MPL_ASSERT_NOT((pred<x,...>)) 229 230#if BOOST_WORKAROUND(BOOST_MSVC, <= 1300) 231# define BOOST_MPL_ASSERT_NOT(pred) \ 232enum { \ 233 BOOST_PP_CAT(mpl_assertion_in_line_,BOOST_MPL_AUX_PP_COUNTER()) = sizeof( \ 234 boost::mpl::assertion<false>::failed( \ 235 boost::mpl::assert_not_arg( (void (*) pred)0, 1 ) \ 236 ) \ 237 ) \ 238}\ 239/**/ 240#else 241# define BOOST_MPL_ASSERT_NOT(pred) \ 242BOOST_MPL_AUX_ASSERT_CONSTANT( \ 243 std::size_t \ 244 , BOOST_PP_CAT(mpl_assertion_in_line_,BOOST_MPL_AUX_PP_COUNTER()) = sizeof( \ 245 boost::mpl::assertion_failed<false>( \ 246 boost::mpl::assert_not_arg( (void (*) pred)0, 1 ) \ 247 ) \ 248 ) \ 249 ) \ 250/**/ 251#endif 252 253// BOOST_MPL_ASSERT_RELATION(x, ==|!=|<=|<|>=|>, y) 254 255#if defined(BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES) 256 257# if !defined(BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER) 258// agurt, 9/nov/06: 'enum' below is a workaround for gcc 4.0.4/4.1.1 bugs #29522 and #29518 259# define BOOST_MPL_ASSERT_RELATION_IMPL(counter, x, rel, y) \ 260enum { BOOST_PP_CAT(mpl_assert_rel_value,counter) = (x rel y) }; \ 261BOOST_MPL_AUX_ASSERT_CONSTANT( \ 262 std::size_t \ 263 , BOOST_PP_CAT(mpl_assertion_in_line_,counter) = sizeof( \ 264 boost::mpl::assertion_failed<BOOST_PP_CAT(mpl_assert_rel_value,counter)>( \ 265 (boost::mpl::failed ************ ( boost::mpl::assert_relation< \ 266 boost::mpl::assert_::relations( sizeof( \ 267 boost::mpl::assert_::arg rel boost::mpl::assert_::arg \ 268 ) ) \ 269 , x \ 270 , y \ 271 >::************)) 0 ) \ 272 ) \ 273 ) \ 274/**/ 275# else 276# define BOOST_MPL_ASSERT_RELATION_IMPL(counter, x, rel, y) \ 277BOOST_MPL_AUX_ASSERT_CONSTANT( \ 278 std::size_t \ 279 , BOOST_PP_CAT(mpl_assert_rel,counter) = sizeof( \ 280 boost::mpl::assert_::arg rel boost::mpl::assert_::arg \ 281 ) \ 282 ); \ 283BOOST_MPL_AUX_ASSERT_CONSTANT( bool, BOOST_PP_CAT(mpl_assert_rel_value,counter) = (x rel y) ); \ 284BOOST_MPL_AUX_ASSERT_CONSTANT( \ 285 std::size_t \ 286 , BOOST_PP_CAT(mpl_assertion_in_line_,counter) = sizeof( \ 287 boost::mpl::assertion_failed<BOOST_PP_CAT(mpl_assert_rel_value,counter)>( \ 288 boost::mpl::assert_rel_arg( boost::mpl::assert_relation< \ 289 boost::mpl::assert_::relations(BOOST_PP_CAT(mpl_assert_rel,counter)) \ 290 , x \ 291 , y \ 292 >() ) \ 293 ) \ 294 ) \ 295 ) \ 296/**/ 297# endif 298 299# define BOOST_MPL_ASSERT_RELATION(x, rel, y) \ 300BOOST_MPL_ASSERT_RELATION_IMPL(BOOST_MPL_AUX_PP_COUNTER(), x, rel, y) \ 301/**/ 302 303#else // !BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES 304 305# if defined(BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER) 306# define BOOST_MPL_ASSERT_RELATION(x, rel, y) \ 307BOOST_MPL_AUX_ASSERT_CONSTANT( \ 308 std::size_t \ 309 , BOOST_PP_CAT(mpl_assertion_in_line_,BOOST_MPL_AUX_PP_COUNTER()) = sizeof( \ 310 boost::mpl::assertion_failed<(x rel y)>( boost::mpl::assert_rel_arg( \ 311 boost::mpl::BOOST_MPL_AUX_ASSERT_RELATION(x,y,(&boost::mpl::operator rel))() \ 312 ) ) \ 313 ) \ 314 ) \ 315/**/ 316# else 317# define BOOST_MPL_ASSERT_RELATION(x, rel, y) \ 318BOOST_MPL_AUX_ASSERT_CONSTANT( \ 319 std::size_t \ 320 , BOOST_PP_CAT(mpl_assertion_in_line_,BOOST_MPL_AUX_PP_COUNTER()) = sizeof( \ 321 boost::mpl::assertion_failed<(x rel y)>( (boost::mpl::failed ************ ( \ 322 boost::mpl::BOOST_MPL_AUX_ASSERT_RELATION(x,y,(&boost::mpl::operator rel))::************))0 ) \ 323 ) \ 324 ) \ 325/**/ 326# endif 327 328#endif 329 330 331// BOOST_MPL_ASSERT_MSG( (pred<x,...>::value), USER_PROVIDED_MESSAGE, (types<x,...>) ) 332 333#if BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3202)) 334# define BOOST_MPL_ASSERT_MSG_IMPL( counter, c, msg, types_ ) \ 335struct msg; \ 336typedef struct BOOST_PP_CAT(msg,counter) : boost::mpl::assert_ \ 337{ \ 338 using boost::mpl::assert_::types; \ 339 static boost::mpl::failed ************ (msg::************ assert_arg()) types_ \ 340 { return 0; } \ 341} BOOST_PP_CAT(mpl_assert_arg,counter); \ 342BOOST_MPL_AUX_ASSERT_CONSTANT( \ 343 std::size_t \ 344 , BOOST_PP_CAT(mpl_assertion_in_line_,counter) = sizeof( \ 345 boost::mpl::assertion<(c)>::failed( BOOST_PP_CAT(mpl_assert_arg,counter)::assert_arg() ) \ 346 ) \ 347 ) \ 348/**/ 349#else 350# define BOOST_MPL_ASSERT_MSG_IMPL( counter, c, msg, types_ ) \ 351struct msg; \ 352typedef struct BOOST_PP_CAT(msg,counter) : boost::mpl::assert_ \ 353{ \ 354 static boost::mpl::failed ************ (msg::************ assert_arg()) types_ \ 355 { return 0; } \ 356} BOOST_PP_CAT(mpl_assert_arg,counter); \ 357BOOST_MPL_AUX_ASSERT_CONSTANT( \ 358 std::size_t \ 359 , BOOST_PP_CAT(mpl_assertion_in_line_,counter) = sizeof( \ 360 boost::mpl::assertion_failed<(c)>( BOOST_PP_CAT(mpl_assert_arg,counter)::assert_arg() ) \ 361 ) \ 362 ) \ 363/**/ 364#endif 365 366#define BOOST_MPL_ASSERT_MSG( c, msg, types_ ) \ 367BOOST_MPL_ASSERT_MSG_IMPL( BOOST_MPL_AUX_PP_COUNTER(), c, msg, types_ ) \ 368/**/ 369 370#endif // BOOST_MPL_ASSERT_HPP_INCLUDED 371