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/PGI/Clang (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) || defined(__clang__)
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
66BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_OPEN
67
68struct 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
79template< bool C > struct assert { typedef void* type; };
80template<> struct assert<false> { typedef AUX778076_ASSERT_ARG(assert) type; };
81
82template< bool C >
83int assertion_failed( typename assert<C>::type );
84
85template< bool C >
86struct assertion
87{
88 static int failed( assert<false> );
89};
90
91template<>
92struct assertion<true>
93{
94 static int failed( void* );
95};
96
97struct 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
109bool operator==( failed, failed );
110bool operator!=( failed, failed );
111bool operator>( failed, failed );
112bool operator>=( failed, failed );
113bool operator<( failed, failed );
114bool operator<=( failed, failed );
115
116#if defined(__EDG_VERSION__)
117template< 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
120template< BOOST_MPL_AUX_NTTP_DECL(long, x), BOOST_MPL_AUX_NTTP_DECL(long, y), bool (*)(failed, failed) >
121struct 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
127boost::mpl::aux::weighted_tag<1>::type operator==( assert_, assert_ );
128boost::mpl::aux::weighted_tag<2>::type operator!=( assert_, assert_ );
129boost::mpl::aux::weighted_tag<3>::type operator>( assert_, assert_ );
130boost::mpl::aux::weighted_tag<4>::type operator>=( assert_, assert_ );
131boost::mpl::aux::weighted_tag<5>::type operator<( assert_, assert_ );
132boost::mpl::aux::weighted_tag<6>::type operator<=( assert_, assert_ );
133
134template< assert_::relations r, long x, long y > struct assert_relation {};
135
136#endif
137
138#if BOOST_WORKAROUND(BOOST_MSVC, == 1700)
139
140template<class Pred>
141struct extract_assert_pred;
142
143template<class Pred>
144struct extract_assert_pred<void(Pred)> { typedef Pred type; };
145
146template<class Pred>
147struct 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
156template<class Pred>
157struct 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
166template< typename T >
167T make_assert_arg();
168
169#elif !defined(BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER)
170
171template< bool > struct assert_arg_pred_impl { typedef int type; };
172template<> struct assert_arg_pred_impl<true> { typedef void* type; };
173
174template< 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
180template< 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 BOOST_WORKAROUND(BOOST_GCC_VERSION, >= 80000)
188#define BOOST_MPL_IGNORE_PARENTHESES_WARNING
189#pragma GCC diagnostic push
190#pragma GCC diagnostic ignored "-Wparentheses"
191#endif
192
193template< typename Pred >
194failed ************ (Pred::************
195 assert_arg( void (*)(Pred), typename assert_arg_pred<Pred>::type )
196 );
197
198template< typename Pred >
199failed ************ (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
208template< typename Pred >
209AUX778076_ASSERT_ARG(assert<false>)
210assert_arg( void (*)(Pred), typename assert_arg_pred_not<Pred>::type );
211
212template< typename Pred >
213AUX778076_ASSERT_ARG(assert<false>)
214assert_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
219template< bool c, typename Pred > struct assert_arg_type_impl
220{
221 typedef failed ************ Pred::* mwcw83_wknd;
222 typedef mwcw83_wknd ************* type;
223};
224
225template< typename Pred > struct assert_arg_type_impl<true,Pred>
226{
227 typedef AUX778076_ASSERT_ARG(assert<false>) type;
228};
229
230template< 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
235template< typename Pred >
236typename assert_arg_type<Pred>::type
237assert_arg(void (*)(Pred), int);
238
239template< typename Pred >
240typename assert_arg_type< boost::mpl::not_<Pred> >::type
241assert_not_arg(void (*)(Pred), int);
242
243# if !defined(BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES)
244template< long x, long y, bool (*r)(failed, failed) >
245typename assert_arg_type_impl< false,BOOST_MPL_AUX_ASSERT_RELATION(x,y,r) >::type
246assert_rel_arg( BOOST_MPL_AUX_ASSERT_RELATION(x,y,r) );
247# else
248template< assert_::relations r, long x, long y >
249typename assert_arg_type_impl< false,assert_relation<r,x,y> >::type
250assert_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
257BOOST_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) \
264BOOST_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) \
279BOOST_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) \
296BOOST_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)BOOST_NULLPTR, 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) \
310enum { \
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)BOOST_NULLPTR, 1 ) \
314 ) \
315 ) \
316}\
317/**/
318#else
319# define BOOST_MPL_ASSERT_NOT(pred) \
320BOOST_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)BOOST_NULLPTR, 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) \
340enum { BOOST_PP_CAT(mpl_assert_rel_value,counter) = (x rel y) }; \
341BOOST_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) \
357BOOST_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 ); \
363BOOST_MPL_AUX_ASSERT_CONSTANT( bool, BOOST_PP_CAT(mpl_assert_rel_value,counter) = (x rel y) ); \
364BOOST_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) \
380BOOST_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) \
387BOOST_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) \
398BOOST_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_ ) \
415struct msg; \
416typedef 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); \
422BOOST_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_ ) \
431struct msg; \
432typedef 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); \
437BOOST_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_ ) \
451BOOST_STATIC_ASSERT_MSG( c, #msg ) \
452/**/
453#else
454# define BOOST_MPL_ASSERT_MSG( c, msg, types_ ) \
455BOOST_MPL_ASSERT_MSG_IMPL( BOOST_MPL_AUX_PP_COUNTER(), c, msg, types_ ) \
456/**/
457#endif
458
459#endif // BOOST_MPL_ASSERT_HPP_INCLUDED
460

source code of boost/libs/mpl/include/boost/mpl/assert.hpp