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| 2 | #ifndef BOOST_MPL_ASSERT_HPP_INCLUDED |
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| 3 | #define BOOST_MPL_ASSERT_HPP_INCLUDED |
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| 4 | |
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| 5 | // Copyright Aleksey Gurtovoy 2000-2006 |
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| 6 | // |
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| 7 | // Distributed under the Boost Software License, Version 1.0. |
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| 8 | // (See accompanying file LICENSE_1_0.txt or copy at |
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| 9 | // http://www.boost.org/LICENSE_1_0.txt) |
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| 10 | // |
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| 11 | // See http://www.boost.org/libs/mpl for documentation. |
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| 12 | |
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| 13 | // $Id: assert.hpp 49267 2008-10-11 06:19:02Z agurtovoy $ |
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| 14 | // $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $ |
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| 15 | // $Revision: 49267 $ |
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| 16 | |
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| 17 | #include <boost/mpl/not.hpp> |
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| 18 | #include <boost/mpl/aux_/value_wknd.hpp> |
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| 19 | #include <boost/mpl/aux_/nested_type_wknd.hpp> |
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| 20 | #include <boost/mpl/aux_/yes_no.hpp> |
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| 21 | #include <boost/mpl/aux_/na.hpp> |
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| 22 | #include <boost/mpl/aux_/adl_barrier.hpp> |
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| 23 | |
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| 24 | #include <boost/mpl/aux_/config/nttp.hpp> |
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| 25 | #include <boost/mpl/aux_/config/dtp.hpp> |
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| 26 | #include <boost/mpl/aux_/config/gcc.hpp> |
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| 27 | #include <boost/mpl/aux_/config/msvc.hpp> |
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| 28 | #include <boost/mpl/aux_/config/static_constant.hpp> |
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| 29 | #include <boost/mpl/aux_/config/pp_counter.hpp> |
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| 30 | #include <boost/mpl/aux_/config/workaround.hpp> |
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| 31 | |
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| 32 | #include <boost/preprocessor/cat.hpp> |
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| 33 | |
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| 34 | #include <boost/config.hpp> // make sure 'size_t' is placed into 'std' |
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| 35 | #include <cstddef> |
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| 36 | |
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| 37 | |
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| 38 | #if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x610)) \ |
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| 39 | || (BOOST_MPL_CFG_GCC != 0) \ |
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| 40 | || BOOST_WORKAROUND(__IBMCPP__, <= 600) |
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| 41 | # define BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES |
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| 42 | #endif |
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| 43 | |
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| 44 | #if BOOST_WORKAROUND(__MWERKS__, < 0x3202) \ |
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| 45 | || BOOST_WORKAROUND(__EDG_VERSION__, <= 238) \ |
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| 46 | || BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x610)) \ |
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| 47 | || BOOST_WORKAROUND(__DMC__, BOOST_TESTED_AT(0x840)) |
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| 48 | # define BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER |
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| 49 | #endif |
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| 50 | |
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| 51 | // agurt, 10/nov/06: use enums for Borland (which cannot cope with static constants) |
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| 52 | // and GCC (which issues "unused variable" warnings when static constants are used |
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| 53 | // at a function scope) |
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| 54 | #if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x610)) \ |
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| 55 | || (BOOST_MPL_CFG_GCC != 0) |
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| 56 | # define BOOST_MPL_AUX_ASSERT_CONSTANT(T, expr) enum { expr } |
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| 57 | #else |
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| 58 | # define BOOST_MPL_AUX_ASSERT_CONSTANT(T, expr) BOOST_STATIC_CONSTANT(T, expr) |
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| 59 | #endif |
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| 60 | |
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| 61 | |
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| 62 | BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_OPEN |
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| 63 | |
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| 64 | struct failed {}; |
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| 65 | |
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| 66 | // agurt, 24/aug/04: MSVC 7.1 workaround here and below: return/accept |
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| 67 | // 'assert<false>' by reference; can't apply it unconditionally -- apparently it |
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| 68 | // degrades the quality of GCC diagnostics |
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| 69 | #if BOOST_WORKAROUND(BOOST_MSVC, == 1310) |
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| 70 | # define AUX778076_ASSERT_ARG(x) x& |
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| 71 | #else |
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| 72 | # define AUX778076_ASSERT_ARG(x) x |
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| 73 | #endif |
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| 74 | |
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| 75 | template< bool C > struct assert { typedef void* type; }; |
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| 76 | template<> struct assert<false> { typedef AUX778076_ASSERT_ARG(assert) type; }; |
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| 77 | |
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| 78 | template< bool C > |
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| 79 | int assertion_failed( typename assert<C>::type ); |
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| 80 | |
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| 81 | template< bool C > |
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| 82 | struct assertion |
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| 83 | { |
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| 84 | static int failed( assert<false> ); |
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| 85 | }; |
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| 86 | |
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| 87 | template<> |
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| 88 | struct assertion<true> |
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| 89 | { |
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| 90 | static int failed( void* ); |
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| 91 | }; |
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| 92 | |
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| 93 | struct assert_ |
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| 94 | { |
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| 95 | #if !defined(BOOST_MPL_CFG_NO_DEFAULT_PARAMETERS_IN_NESTED_TEMPLATES) |
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| 96 | template< typename T1, typename T2 = na, typename T3 = na, typename T4 = na > struct types {}; |
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| 97 | #endif |
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| 98 | static assert_ const arg; |
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| 99 | enum relations { equal = 1, not_equal, greater, greater_equal, less, less_equal }; |
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| 100 | }; |
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| 101 | |
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| 102 | |
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| 103 | #if !defined(BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES) |
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| 104 | |
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| 105 | bool operator==( failed, failed ); |
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| 106 | bool operator!=( failed, failed ); |
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| 107 | bool operator>( failed, failed ); |
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| 108 | bool operator>=( failed, failed ); |
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| 109 | bool operator<( failed, failed ); |
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| 110 | bool operator<=( failed, failed ); |
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| 111 | |
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| 112 | #if defined(__EDG_VERSION__) |
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| 113 | template< bool (*)(failed, failed), long x, long y > struct assert_relation {}; |
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| 114 | # define BOOST_MPL_AUX_ASSERT_RELATION(x, y, r) assert_relation<r,x,y> |
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| 115 | #else |
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| 116 | template< BOOST_MPL_AUX_NTTP_DECL(long, x), BOOST_MPL_AUX_NTTP_DECL(long, y), bool (*)(failed, failed) > |
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| 117 | struct assert_relation {}; |
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| 118 | # define BOOST_MPL_AUX_ASSERT_RELATION(x, y, r) assert_relation<x,y,r> |
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| 119 | #endif |
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| 120 | |
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| 121 | #else // BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES |
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| 122 | |
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| 123 | boost::mpl::aux::weighted_tag<1>::type operator==( assert_, assert_ ); |
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| 124 | boost::mpl::aux::weighted_tag<2>::type operator!=( assert_, assert_ ); |
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| 125 | boost::mpl::aux::weighted_tag<3>::type operator>( assert_, assert_ ); |
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| 126 | boost::mpl::aux::weighted_tag<4>::type operator>=( assert_, assert_ ); |
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| 127 | boost::mpl::aux::weighted_tag<5>::type operator<( assert_, assert_ ); |
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| 128 | boost::mpl::aux::weighted_tag<6>::type operator<=( assert_, assert_ ); |
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| 129 | |
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| 130 | template< assert_::relations r, long x, long y > struct assert_relation {}; |
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| 131 | |
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| 132 | #endif |
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| 133 | |
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| 134 | |
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| 135 | #if !defined(BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER) |
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| 136 | |
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| 137 | template< bool > struct assert_arg_pred_impl { typedef int type; }; |
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| 138 | template<> struct assert_arg_pred_impl<true> { typedef void* type; }; |
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| 139 | |
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| 140 | template< typename P > struct assert_arg_pred |
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| 141 | { |
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| 142 | typedef typename P::type p_type; |
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| 143 | typedef typename assert_arg_pred_impl< p_type::value >::type type; |
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| 144 | }; |
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| 145 | |
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| 146 | template< typename P > struct assert_arg_pred_not |
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| 147 | { |
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| 148 | typedef typename P::type p_type; |
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| 149 | BOOST_MPL_AUX_ASSERT_CONSTANT( bool, p = !p_type::value ); |
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| 150 | typedef typename assert_arg_pred_impl<p>::type type; |
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| 151 | }; |
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| 152 | |
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| 153 | template< typename Pred > |
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| 154 | failed ************ (Pred::************ |
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| 155 | assert_arg( void (*)(Pred), typename assert_arg_pred<Pred>::type ) |
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| 156 | ); |
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| 157 | |
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| 158 | template< typename Pred > |
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| 159 | failed ************ (boost::mpl::not_<Pred>::************ |
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| 160 | assert_not_arg( void (*)(Pred), typename assert_arg_pred_not<Pred>::type ) |
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| 161 | ); |
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| 162 | |
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| 163 | template< typename Pred > |
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| 164 | AUX778076_ASSERT_ARG(assert<false>) |
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| 165 | assert_arg( void (*)(Pred), typename assert_arg_pred_not<Pred>::type ); |
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| 166 | |
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| 167 | template< typename Pred > |
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| 168 | AUX778076_ASSERT_ARG(assert<false>) |
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| 169 | assert_not_arg( void (*)(Pred), typename assert_arg_pred<Pred>::type ); |
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| 170 | |
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| 171 | |
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| 172 | #else // BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER |
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| 173 | |
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| 174 | template< bool c, typename Pred > struct assert_arg_type_impl |
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| 175 | { |
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| 176 | typedef failed ************ Pred::* mwcw83_wknd; |
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| 177 | typedef mwcw83_wknd ************* type; |
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| 178 | }; |
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| 179 | |
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| 180 | template< typename Pred > struct assert_arg_type_impl<true,Pred> |
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| 181 | { |
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| 182 | typedef AUX778076_ASSERT_ARG(assert<false>) type; |
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| 183 | }; |
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| 184 | |
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| 185 | template< typename Pred > struct assert_arg_type |
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| 186 | : assert_arg_type_impl< BOOST_MPL_AUX_VALUE_WKND(BOOST_MPL_AUX_NESTED_TYPE_WKND(Pred))::value, Pred > |
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| 187 | { |
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| 188 | }; |
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| 189 | |
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| 190 | template< typename Pred > |
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| 191 | typename assert_arg_type<Pred>::type |
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| 192 | assert_arg(void (*)(Pred), int); |
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| 193 | |
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| 194 | template< typename Pred > |
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| 195 | typename assert_arg_type< boost::mpl::not_<Pred> >::type |
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| 196 | assert_not_arg(void (*)(Pred), int); |
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| 197 | |
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| 198 | # if !defined(BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES) |
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| 199 | template< long x, long y, bool (*r)(failed, failed) > |
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| 200 | typename assert_arg_type_impl< false,BOOST_MPL_AUX_ASSERT_RELATION(x,y,r) >::type |
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| 201 | assert_rel_arg( BOOST_MPL_AUX_ASSERT_RELATION(x,y,r) ); |
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| 202 | # else |
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| 203 | template< assert_::relations r, long x, long y > |
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| 204 | typename assert_arg_type_impl< false,assert_relation<r,x,y> >::type |
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| 205 | assert_rel_arg( assert_relation<r,x,y> ); |
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| 206 | # endif |
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| 207 | |
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| 208 | #endif // BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER |
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| 209 | |
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| 210 | #undef AUX778076_ASSERT_ARG |
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| 211 | |
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| 212 | BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_CLOSE |
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| 213 | |
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| 214 | |
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| 215 | // BOOST_MPL_ASSERT((pred<x,...>)) |
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| 216 | |
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| 217 | #define BOOST_MPL_ASSERT(pred) \ |
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| 218 | BOOST_MPL_AUX_ASSERT_CONSTANT( \ |
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| 219 | std::size_t \ |
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| 220 | , BOOST_PP_CAT(mpl_assertion_in_line_,BOOST_MPL_AUX_PP_COUNTER()) = sizeof( \ |
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| 221 | boost::mpl::assertion_failed<false>( \ |
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| 222 | boost::mpl::assert_arg( (void (*) pred)0, 1 ) \ |
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| 223 | ) \ |
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| 224 | ) \ |
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| 225 | ) \ |
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| 226 | /**/ |
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| 227 | |
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| 228 | // BOOST_MPL_ASSERT_NOT((pred<x,...>)) |
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| 229 | |
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| 230 | #if BOOST_WORKAROUND(BOOST_MSVC, <= 1300) |
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| 231 | # define BOOST_MPL_ASSERT_NOT(pred) \ |
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| 232 | enum { \ |
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| 233 | BOOST_PP_CAT(mpl_assertion_in_line_,BOOST_MPL_AUX_PP_COUNTER()) = sizeof( \ |
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| 234 | boost::mpl::assertion<false>::failed( \ |
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| 235 | boost::mpl::assert_not_arg( (void (*) pred)0, 1 ) \ |
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| 236 | ) \ |
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| 237 | ) \ |
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| 238 | }\ |
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| 239 | /**/ |
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| 240 | #else |
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| 241 | # define BOOST_MPL_ASSERT_NOT(pred) \ |
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| 242 | BOOST_MPL_AUX_ASSERT_CONSTANT( \ |
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| 243 | std::size_t \ |
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| 244 | , BOOST_PP_CAT(mpl_assertion_in_line_,BOOST_MPL_AUX_PP_COUNTER()) = sizeof( \ |
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| 245 | boost::mpl::assertion_failed<false>( \ |
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| 246 | boost::mpl::assert_not_arg( (void (*) pred)0, 1 ) \ |
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| 247 | ) \ |
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| 248 | ) \ |
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| 249 | ) \ |
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| 250 | /**/ |
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| 251 | #endif |
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| 252 | |
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| 253 | // BOOST_MPL_ASSERT_RELATION(x, ==|!=|<=|<|>=|>, y) |
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| 254 | |
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| 255 | #if defined(BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES) |
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| 256 | |
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| 257 | # if !defined(BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER) |
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| 258 | // agurt, 9/nov/06: 'enum' below is a workaround for gcc 4.0.4/4.1.1 bugs #29522 and #29518 |
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| 259 | # define BOOST_MPL_ASSERT_RELATION_IMPL(counter, x, rel, y) \ |
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| 260 | enum { BOOST_PP_CAT(mpl_assert_rel_value,counter) = (x rel y) }; \ |
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| 261 | BOOST_MPL_AUX_ASSERT_CONSTANT( \ |
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| 262 | std::size_t \ |
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| 263 | , BOOST_PP_CAT(mpl_assertion_in_line_,counter) = sizeof( \ |
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| 264 | boost::mpl::assertion_failed<BOOST_PP_CAT(mpl_assert_rel_value,counter)>( \ |
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| 265 | (boost::mpl::failed ************ ( boost::mpl::assert_relation< \ |
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| 266 | boost::mpl::assert_::relations( sizeof( \ |
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| 267 | boost::mpl::assert_::arg rel boost::mpl::assert_::arg \ |
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| 268 | ) ) \ |
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| 269 | , x \ |
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| 270 | , y \ |
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| 271 | >::************)) 0 ) \ |
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| 272 | ) \ |
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| 273 | ) \ |
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| 274 | /**/ |
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| 275 | # else |
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| 276 | # define BOOST_MPL_ASSERT_RELATION_IMPL(counter, x, rel, y) \ |
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| 277 | BOOST_MPL_AUX_ASSERT_CONSTANT( \ |
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| 278 | std::size_t \ |
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| 279 | , BOOST_PP_CAT(mpl_assert_rel,counter) = sizeof( \ |
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| 280 | boost::mpl::assert_::arg rel boost::mpl::assert_::arg \ |
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| 281 | ) \ |
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| 282 | ); \ |
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| 283 | BOOST_MPL_AUX_ASSERT_CONSTANT( bool, BOOST_PP_CAT(mpl_assert_rel_value,counter) = (x rel y) ); \ |
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| 284 | BOOST_MPL_AUX_ASSERT_CONSTANT( \ |
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| 285 | std::size_t \ |
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| 286 | , BOOST_PP_CAT(mpl_assertion_in_line_,counter) = sizeof( \ |
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| 287 | boost::mpl::assertion_failed<BOOST_PP_CAT(mpl_assert_rel_value,counter)>( \ |
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| 288 | boost::mpl::assert_rel_arg( boost::mpl::assert_relation< \ |
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| 289 | boost::mpl::assert_::relations(BOOST_PP_CAT(mpl_assert_rel,counter)) \ |
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| 290 | , x \ |
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| 291 | , y \ |
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| 292 | >() ) \ |
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| 293 | ) \ |
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| 294 | ) \ |
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| 295 | ) \ |
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| 296 | /**/ |
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| 297 | # endif |
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| 298 | |
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| 299 | # define BOOST_MPL_ASSERT_RELATION(x, rel, y) \ |
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| 300 | BOOST_MPL_ASSERT_RELATION_IMPL(BOOST_MPL_AUX_PP_COUNTER(), x, rel, y) \ |
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| 301 | /**/ |
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| 302 | |
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| 303 | #else // !BOOST_MPL_CFG_ASSERT_USE_RELATION_NAMES |
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| 304 | |
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| 305 | # if defined(BOOST_MPL_CFG_ASSERT_BROKEN_POINTER_TO_POINTER_TO_MEMBER) |
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| 306 | # define BOOST_MPL_ASSERT_RELATION(x, rel, y) \ |
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| 307 | BOOST_MPL_AUX_ASSERT_CONSTANT( \ |
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| 308 | std::size_t \ |
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| 309 | , BOOST_PP_CAT(mpl_assertion_in_line_,BOOST_MPL_AUX_PP_COUNTER()) = sizeof( \ |
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| 310 | boost::mpl::assertion_failed<(x rel y)>( boost::mpl::assert_rel_arg( \ |
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| 311 | boost::mpl::BOOST_MPL_AUX_ASSERT_RELATION(x,y,(&boost::mpl::operator rel))() \ |
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| 312 | ) ) \ |
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| 313 | ) \ |
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| 314 | ) \ |
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| 315 | /**/ |
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| 316 | # else |
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| 317 | # define BOOST_MPL_ASSERT_RELATION(x, rel, y) \ |
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| 318 | BOOST_MPL_AUX_ASSERT_CONSTANT( \ |
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| 319 | std::size_t \ |
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| 320 | , BOOST_PP_CAT(mpl_assertion_in_line_,BOOST_MPL_AUX_PP_COUNTER()) = sizeof( \ |
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| 321 | boost::mpl::assertion_failed<(x rel y)>( (boost::mpl::failed ************ ( \ |
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| 322 | boost::mpl::BOOST_MPL_AUX_ASSERT_RELATION(x,y,(&boost::mpl::operator rel))::************))0 ) \ |
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| 323 | ) \ |
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| 324 | ) \ |
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| 325 | /**/ |
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| 326 | # endif |
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| 327 | |
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| 328 | #endif |
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| 329 | |
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| 330 | |
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| 331 | // BOOST_MPL_ASSERT_MSG( (pred<x,...>::value), USER_PROVIDED_MESSAGE, (types<x,...>) ) |
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| 332 | |
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| 333 | #if BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3202)) |
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| 334 | # define BOOST_MPL_ASSERT_MSG_IMPL( counter, c, msg, types_ ) \ |
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| 335 | struct msg; \ |
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| 336 | typedef struct BOOST_PP_CAT(msg,counter) : boost::mpl::assert_ \ |
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| 337 | { \ |
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| 338 | using boost::mpl::assert_::types; \ |
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| 339 | static boost::mpl::failed ************ (msg::************ assert_arg()) types_ \ |
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| 340 | { return 0; } \ |
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| 341 | } BOOST_PP_CAT(mpl_assert_arg,counter); \ |
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| 342 | BOOST_MPL_AUX_ASSERT_CONSTANT( \ |
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| 343 | std::size_t \ |
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| 344 | , BOOST_PP_CAT(mpl_assertion_in_line_,counter) = sizeof( \ |
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| 345 | boost::mpl::assertion<(c)>::failed( BOOST_PP_CAT(mpl_assert_arg,counter)::assert_arg() ) \ |
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| 346 | ) \ |
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| 347 | ) \ |
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| 348 | /**/ |
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| 349 | #else |
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| 350 | # define BOOST_MPL_ASSERT_MSG_IMPL( counter, c, msg, types_ ) \ |
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| 351 | struct msg; \ |
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| 352 | typedef struct BOOST_PP_CAT(msg,counter) : boost::mpl::assert_ \ |
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| 353 | { \ |
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| 354 | static boost::mpl::failed ************ (msg::************ assert_arg()) types_ \ |
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| 355 | { return 0; } \ |
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| 356 | } BOOST_PP_CAT(mpl_assert_arg,counter); \ |
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| 357 | BOOST_MPL_AUX_ASSERT_CONSTANT( \ |
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| 358 | std::size_t \ |
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| 359 | , BOOST_PP_CAT(mpl_assertion_in_line_,counter) = sizeof( \ |
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| 360 | boost::mpl::assertion_failed<(c)>( BOOST_PP_CAT(mpl_assert_arg,counter)::assert_arg() ) \ |
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| 361 | ) \ |
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| 362 | ) \ |
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| 363 | /**/ |
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| 364 | #endif |
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| 365 | |
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| 366 | #define BOOST_MPL_ASSERT_MSG( c, msg, types_ ) \ |
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| 367 | BOOST_MPL_ASSERT_MSG_IMPL( BOOST_MPL_AUX_PP_COUNTER(), c, msg, types_ ) \ |
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| 368 | /**/ |
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| 369 | |
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| 370 | #endif // BOOST_MPL_ASSERT_HPP_INCLUDED |
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