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source: downloads/boost_1_33_1/boost/mpl/assert.hpp @ 13

Last change on this file since 13 was 12, checked in by landauf, 18 years ago

added boost
File size: 10.3 KB
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1
2#ifndef BOOST_MPL_ASSERT_HPP_INCLUDED
3#define BOOST_MPL_ASSERT_HPP_INCLUDED
4
5// Copyright Aleksey Gurtovoy 2000-2004
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// $Source: /cvsroot/boost/boost/boost/mpl/assert.hpp,v $
14// $Date: 2004/09/28 13:56:58 $
15// $Revision: 1.13 $
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/workaround.hpp>
29
30#include <boost/preprocessor/cat.hpp>
31
32#if BOOST_WORKAROUND(__BORLANDC__, >= 0x560) && BOOST_WORKAROUND(__BORLANDC__, < 0x600) \
33    || (BOOST_MPL_CFG_GCC != 0)
34#   define BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES
35#endif
36
37#if BOOST_WORKAROUND(__MWERKS__, < 0x3202) \
38    || BOOST_WORKAROUND(__EDG_VERSION__, <= 238) \
39    || BOOST_WORKAROUND(__BORLANDC__, < 0x600) \
40    || BOOST_WORKAROUND(__DMC__, BOOST_TESTED_AT(0x840))
41#   define BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER
42#endif
43
44
45BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_OPEN
46
47struct failed {};
48
49// agurt, 24/aug/04: MSVC 7.1 workaround here and below: return/accept
50// 'assert<false>' by reference; can't apply it unconditionally -- apparently it
51// degrades quality of GCC diagnostics
52#if BOOST_WORKAROUND(BOOST_MSVC, == 1310)
53#   define AUX778076_ASSERT_ARG(x) x&
54#else
55#   define AUX778076_ASSERT_ARG(x) x
56#endif
57
58template< bool C >  struct assert        { typedef void* type; };
59template<>          struct assert<false> { typedef AUX778076_ASSERT_ARG(assert) type; };
60
61template< bool C >
62int assertion_failed( typename assert<C>::type );
63
64template< bool C >
65struct assertion
66{
67    static int failed( assert<false> );
68};
69
70template<>
71struct assertion<true>
72{
73    static int failed( void* );
74};
75
76struct assert_
77{
78#if !defined(BOOST_MPL_CFG_NO_DEFAULT_PARAMETERS_IN_NESTED_TEMPLATES)
79    template< typename T1, typename T2 = na, typename T3 = na, typename T4 = na > struct types {};
80#endif
81    static assert_ const arg;
82    enum relations { equal = 1, not_equal, greater, greater_equal, less, less_equal };
83};
84
85
86#if !defined(BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES)
87
88bool operator==( failed, failed );
89bool operator!=( failed, failed );
90bool operator>( failed, failed );
91bool operator>=( failed, failed );
92bool operator<( failed, failed );
93bool operator<=( failed, failed );
94
95#if defined(__EDG_VERSION__)
96template< bool (*)(failed, failed), long x, long y > struct assert_relation {};
97#   define BOOST_MPL_AUX_ASSERT_RELATION(x, y, r) assert_relation<r,x,y>
98#else
99template< BOOST_MPL_AUX_NTTP_DECL(long, x), BOOST_MPL_AUX_NTTP_DECL(long, y), bool (*)(failed, failed) > 
100struct assert_relation {};
101#   define BOOST_MPL_AUX_ASSERT_RELATION(x, y, r) assert_relation<x,y,r>
102#endif
103
104#else // BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES
105
106boost::mpl::aux::weighted_tag<1>::type operator==( assert_, assert_ );
107boost::mpl::aux::weighted_tag<2>::type operator!=( assert_, assert_ );
108boost::mpl::aux::weighted_tag<3>::type operator>(  assert_, assert_ );
109boost::mpl::aux::weighted_tag<4>::type operator>=( assert_, assert_ );
110boost::mpl::aux::weighted_tag<5>::type operator<( assert_, assert_ );
111boost::mpl::aux::weighted_tag<6>::type operator<=( assert_, assert_ );
112
113template< assert_::relations r, long x, long y > struct assert_relation {};
114
115#endif
116
117
118#if !defined(BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER)
119
120template< bool > struct assert_arg_pred_impl { typedef int type; };
121template<> struct assert_arg_pred_impl<true> { typedef void* type; };
122
123template< typename P > struct assert_arg_pred
124{
125    typedef typename P::type p_type;
126    typedef typename assert_arg_pred_impl< p_type::value >::type type;
127};
128
129template< typename P > struct assert_arg_pred_not
130{
131    typedef typename P::type p_type;
132    enum { p = !p_type::value };
133    typedef typename assert_arg_pred_impl<p>::type type;
134};
135
136template< typename Pred >
137failed ************ (Pred::************ 
138      assert_arg( void (*)(Pred), typename assert_arg_pred<Pred>::type )
139    );
140
141template< typename Pred >
142failed ************ (boost::mpl::not_<Pred>::************ 
143      assert_not_arg( void (*)(Pred), typename assert_arg_pred_not<Pred>::type )
144    );
145
146template< typename Pred >
147AUX778076_ASSERT_ARG(assert<false>)
148assert_arg( void (*)(Pred), typename assert_arg_pred_not<Pred>::type );
149
150template< typename Pred >
151AUX778076_ASSERT_ARG(assert<false>)
152assert_not_arg( void (*)(Pred), typename assert_arg_pred<Pred>::type );
153
154
155#else // BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER
156       
157template< bool c, typename Pred > struct assert_arg_type_impl
158{
159    typedef failed      ************ Pred::* mwcw83_wknd;
160    typedef mwcw83_wknd ************* type;
161};
162
163template< typename Pred > struct assert_arg_type_impl<true,Pred>
164{
165    typedef AUX778076_ASSERT_ARG(assert<false>) type;
166};
167
168template< typename Pred > struct assert_arg_type
169    : assert_arg_type_impl< BOOST_MPL_AUX_VALUE_WKND(BOOST_MPL_AUX_NESTED_TYPE_WKND(Pred))::value, Pred >
170{
171};
172
173template< typename Pred >
174typename assert_arg_type<Pred>::type
175assert_arg(void (*)(Pred), int);
176
177template< typename Pred >
178typename assert_arg_type< boost::mpl::not_<Pred> >::type
179assert_not_arg(void (*)(Pred), int);
180
181#   if !defined(BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES)
182template< long x, long y, bool (*r)(failed, failed) >
183typename assert_arg_type_impl< false,BOOST_MPL_AUX_ASSERT_RELATION(x,y,r) >::type
184assert_rel_arg( BOOST_MPL_AUX_ASSERT_RELATION(x,y,r) );
185#   else
186template< assert_::relations r, long x, long y >
187typename assert_arg_type_impl< false,assert_relation<r,x,y> >::type
188assert_rel_arg( assert_relation<r,x,y> );
189#   endif
190
191#endif // BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER
192
193#undef AUX778076_ASSERT_ARG
194
195BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_CLOSE
196
197
198// BOOST_MPL_ASSERT((pred<x,...>))
199
200#define BOOST_MPL_ASSERT(pred) \
201enum { \
202    BOOST_PP_CAT(mpl_assertion_in_line_,__LINE__) = sizeof( \
203          boost::mpl::assertion_failed<false>( \
204              boost::mpl::assert_arg( (void (*) pred)0, 1 ) \
205            ) \
206        ) \
207}\
208/**/
209
210// BOOST_MPL_ASSERT_NOT((pred<x,...>))
211
212#if BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
213#   define BOOST_MPL_ASSERT_NOT(pred) \
214enum { \
215    BOOST_PP_CAT(mpl_assertion_in_line_,__LINE__) = sizeof( \
216          boost::mpl::assertion<false>::failed( \
217              boost::mpl::assert_not_arg( (void (*) pred)0, 1 ) \
218            ) \
219        ) \
220}\
221/**/
222#else
223#   define BOOST_MPL_ASSERT_NOT(pred) \
224enum { \
225    BOOST_PP_CAT(mpl_assertion_in_line_,__LINE__) = sizeof( \
226          boost::mpl::assertion_failed<false>( \
227              boost::mpl::assert_not_arg( (void (*) pred)0, 1 ) \
228            ) \
229        ) \
230}\
231/**/
232#endif
233
234// BOOST_MPL_ASSERT_RELATION(x, ==|!=|<=|<|>=|>, y)
235
236#if defined(BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES)
237
238#   if !defined(BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER)
239#   define BOOST_MPL_ASSERT_RELATION(x, rel, y) \
240enum { \
241      BOOST_PP_CAT(mpl_assertion_in_line_,__LINE__) = sizeof( \
242        boost::mpl::assertion_failed<(x rel y)>( \
243            (boost::mpl::failed ************ ( boost::mpl::assert_relation< \
244                  boost::mpl::assert_::relations( sizeof( \
245                      boost::mpl::assert_::arg rel boost::mpl::assert_::arg \
246                    ) ) \
247                , x \
248                , y \
249                >::************)) 0 ) \
250        ) \
251} \
252/**/
253#   else
254#   define BOOST_MPL_ASSERT_RELATION(x, rel, y) \
255enum { \
256      BOOST_PP_CAT(mpl_assert_rel,__LINE__) = sizeof(boost::mpl::assert_::arg rel boost::mpl::assert_::arg) \
257    , BOOST_PP_CAT(mpl_assert_rel_value,__LINE__) = (x rel y) \
258    , BOOST_PP_CAT(mpl_assertion_in_line_,__LINE__) = sizeof( \
259        boost::mpl::assertion_failed<BOOST_PP_CAT(mpl_assert_rel_value,__LINE__)>( \
260              boost::mpl::assert_rel_arg( boost::mpl::assert_relation< \
261                  boost::mpl::assert_::relations(BOOST_PP_CAT(mpl_assert_rel,__LINE__)) \
262                , x \
263                , y \
264                >() ) \
265            ) \
266        ) \
267} \
268/**/
269#   endif
270
271#else // !BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES
272
273#   if defined(BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER)
274#   define BOOST_MPL_ASSERT_RELATION(x, rel, y) \
275enum { \
276    BOOST_PP_CAT(mpl_assertion_in_line_,__LINE__) = sizeof( \
277        boost::mpl::assertion_failed<(x rel y)>( boost::mpl::assert_rel_arg( \
278              boost::mpl::BOOST_MPL_AUX_ASSERT_RELATION(x,y,(&boost::mpl::operator rel))() \
279            ) ) \
280        ) \
281}\
282/**/
283#   else
284#   define BOOST_MPL_ASSERT_RELATION(x, rel, y) \
285enum { \
286    BOOST_PP_CAT(mpl_assertion_in_line_,__LINE__) = sizeof( \
287        boost::mpl::assertion_failed<(x rel y)>( (boost::mpl::failed ************ ( \
288            boost::mpl::BOOST_MPL_AUX_ASSERT_RELATION(x,y,(&boost::mpl::operator rel))::************))0 ) \
289        ) \
290}\
291/**/
292#   endif
293
294#endif
295
296
297// BOOST_MPL_ASSERT_MSG( (pred<x,...>::value), USER_PROVIDED_MESSAGE, (types<x,...>) )
298
299#if BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3202))
300#   define BOOST_MPL_ASSERT_MSG( c, msg, types_ ) \
301    struct msg; \
302    typedef struct BOOST_PP_CAT(msg,__LINE__) : boost::mpl::assert_ \
303    { \
304        using boost::mpl::assert_::types; \
305        static boost::mpl::failed ************ (msg::************ assert_arg()) types_ \
306        { return 0; } \
307    } BOOST_PP_CAT(mpl_assert_arg,__LINE__); \
308    enum { \
309        BOOST_PP_CAT(mpl_assertion_in_line_,__LINE__) = sizeof( \
310            boost::mpl::assertion<(c)>::failed( BOOST_PP_CAT(mpl_assert_arg,__LINE__)::assert_arg() ) \
311            ) \
312    }\
313/**/
314#else
315#   define BOOST_MPL_ASSERT_MSG( c, msg, types_ ) \
316    struct msg; \
317    typedef struct BOOST_PP_CAT(msg,__LINE__) : boost::mpl::assert_ \
318    { \
319        static boost::mpl::failed ************ (msg::************ assert_arg()) types_ \
320        { return 0; } \
321    } BOOST_PP_CAT(mpl_assert_arg,__LINE__); \
322    enum { \
323        BOOST_PP_CAT(mpl_assertion_in_line_,__LINE__) = sizeof( \
324            boost::mpl::assertion_failed<(c)>( BOOST_PP_CAT(mpl_assert_arg,__LINE__)::assert_arg() ) \
325            ) \
326    }\
327/**/
328#endif
329
330#endif // BOOST_MPL_ASSERT_HPP_INCLUDED
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