github.com/searKing/golang/go@v1.2.117/runtime/cgosymbolizer/include/boost/static_assert.hpp (about) 1 // (C) Copyright John Maddock 2000. 2 // Use, modification and distribution are subject to the 3 // Boost Software License, Version 1.0. (See accompanying file 4 // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 5 6 // See http://www.boost.org/libs/static_assert for documentation. 7 8 /* 9 Revision history: 10 02 August 2000 11 Initial version. 12 */ 13 14 #ifndef BOOST_STATIC_ASSERT_HPP 15 #define BOOST_STATIC_ASSERT_HPP 16 17 #include <boost/config.hpp> 18 #include <boost/detail/workaround.hpp> 19 20 #if defined(__GNUC__) && !defined(__GXX_EXPERIMENTAL_CXX0X__) 21 // 22 // This is horrible, but it seems to be the only we can shut up the 23 // "anonymous variadic macros were introduced in C99 [-Wvariadic-macros]" 24 // warning that get spewed out otherwise in non-C++11 mode. 25 // 26 #pragma GCC system_header 27 #endif 28 29 #ifndef BOOST_NO_CXX11_STATIC_ASSERT 30 # ifndef BOOST_NO_CXX11_VARIADIC_MACROS 31 # define BOOST_STATIC_ASSERT_MSG( ... ) static_assert(__VA_ARGS__) 32 # else 33 # define BOOST_STATIC_ASSERT_MSG( B, Msg ) static_assert( B, Msg ) 34 # endif 35 #else 36 # define BOOST_STATIC_ASSERT_MSG( B, Msg ) BOOST_STATIC_ASSERT( B ) 37 #endif 38 39 #ifdef BOOST_BORLANDC 40 // 41 // workaround for buggy integral-constant expression support: 42 #define BOOST_BUGGY_INTEGRAL_CONSTANT_EXPRESSIONS 43 #endif 44 45 #if defined(__GNUC__) && (__GNUC__ == 3) && ((__GNUC_MINOR__ == 3) || (__GNUC_MINOR__ == 4)) 46 // gcc 3.3 and 3.4 don't produce good error messages with the default version: 47 # define BOOST_SA_GCC_WORKAROUND 48 #endif 49 50 // 51 // If the compiler issues warnings about old C style casts, 52 // then enable this: 53 // 54 #if defined(__GNUC__) && ((__GNUC__ > 3) || ((__GNUC__ == 3) && (__GNUC_MINOR__ >= 4))) 55 # ifndef BOOST_NO_CXX11_VARIADIC_MACROS 56 # define BOOST_STATIC_ASSERT_BOOL_CAST( ... ) ((__VA_ARGS__) != 0) 57 # else 58 # define BOOST_STATIC_ASSERT_BOOL_CAST( x ) ((x) != 0) 59 # endif 60 #else 61 # ifndef BOOST_NO_CXX11_VARIADIC_MACROS 62 # define BOOST_STATIC_ASSERT_BOOL_CAST( ... ) (bool)(__VA_ARGS__) 63 # else 64 # define BOOST_STATIC_ASSERT_BOOL_CAST(x) (bool)(x) 65 # endif 66 #endif 67 68 #ifndef BOOST_NO_CXX11_STATIC_ASSERT 69 # ifndef BOOST_NO_CXX11_VARIADIC_MACROS 70 # define BOOST_STATIC_ASSERT( ... ) static_assert(__VA_ARGS__, #__VA_ARGS__) 71 # else 72 # define BOOST_STATIC_ASSERT( B ) static_assert(B, #B) 73 # endif 74 #else 75 76 namespace boost{ 77 78 // HP aCC cannot deal with missing names for template value parameters 79 template <bool x> struct STATIC_ASSERTION_FAILURE; 80 81 template <> struct STATIC_ASSERTION_FAILURE<true> { enum { value = 1 }; }; 82 83 // HP aCC cannot deal with missing names for template value parameters 84 template<int x> struct static_assert_test{}; 85 86 } 87 88 // 89 // Implicit instantiation requires that all member declarations be 90 // instantiated, but that the definitions are *not* instantiated. 91 // 92 // It's not particularly clear how this applies to enum's or typedefs; 93 // both are described as declarations [7.1.3] and [7.2] in the standard, 94 // however some compilers use "delayed evaluation" of one or more of 95 // these when implicitly instantiating templates. We use typedef declarations 96 // by default, but try defining BOOST_USE_ENUM_STATIC_ASSERT if the enum 97 // version gets better results from your compiler... 98 // 99 // Implementation: 100 // Both of these versions rely on sizeof(incomplete_type) generating an error 101 // message containing the name of the incomplete type. We use 102 // "STATIC_ASSERTION_FAILURE" as the type name here to generate 103 // an eye catching error message. The result of the sizeof expression is either 104 // used as an enum initialiser, or as a template argument depending which version 105 // is in use... 106 // Note that the argument to the assert is explicitly cast to bool using old- 107 // style casts: too many compilers currently have problems with static_cast 108 // when used inside integral constant expressions. 109 // 110 #if !defined(BOOST_BUGGY_INTEGRAL_CONSTANT_EXPRESSIONS) 111 112 #if defined(BOOST_MSVC) && defined(BOOST_NO_CXX11_VARIADIC_MACROS) 113 #define BOOST_STATIC_ASSERT( B ) \ 114 typedef ::boost::static_assert_test<\ 115 sizeof(::boost::STATIC_ASSERTION_FAILURE< BOOST_STATIC_ASSERT_BOOL_CAST ( B ) >)>\ 116 BOOST_JOIN(boost_static_assert_typedef_, __COUNTER__) 117 #elif defined(BOOST_MSVC) 118 #define BOOST_STATIC_ASSERT(...) \ 119 typedef ::boost::static_assert_test<\ 120 sizeof(::boost::STATIC_ASSERTION_FAILURE< BOOST_STATIC_ASSERT_BOOL_CAST (__VA_ARGS__) >)>\ 121 BOOST_JOIN(boost_static_assert_typedef_, __COUNTER__) 122 #elif (defined(BOOST_INTEL_CXX_VERSION) || defined(BOOST_SA_GCC_WORKAROUND)) && defined(BOOST_NO_CXX11_VARIADIC_MACROS) 123 // agurt 15/sep/02: a special care is needed to force Intel C++ issue an error 124 // instead of warning in case of failure 125 # define BOOST_STATIC_ASSERT( B ) \ 126 typedef char BOOST_JOIN(boost_static_assert_typedef_, __LINE__) \ 127 [ ::boost::STATIC_ASSERTION_FAILURE< BOOST_STATIC_ASSERT_BOOL_CAST( B ) >::value ] 128 #elif (defined(BOOST_INTEL_CXX_VERSION) || defined(BOOST_SA_GCC_WORKAROUND)) && !defined(BOOST_NO_CXX11_VARIADIC_MACROS) 129 // agurt 15/sep/02: a special care is needed to force Intel C++ issue an error 130 // instead of warning in case of failure 131 # define BOOST_STATIC_ASSERT(...) \ 132 typedef char BOOST_JOIN(boost_static_assert_typedef_, __LINE__) \ 133 [ ::boost::STATIC_ASSERTION_FAILURE< BOOST_STATIC_ASSERT_BOOL_CAST( __VA_ARGS__ ) >::value ] 134 #elif defined(__sgi) 135 // special version for SGI MIPSpro compiler 136 #define BOOST_STATIC_ASSERT( B ) \ 137 BOOST_STATIC_CONSTANT(bool, \ 138 BOOST_JOIN(boost_static_assert_test_, __LINE__) = ( B )); \ 139 typedef ::boost::static_assert_test<\ 140 sizeof(::boost::STATIC_ASSERTION_FAILURE< \ 141 BOOST_JOIN(boost_static_assert_test_, __LINE__) >)>\ 142 BOOST_JOIN(boost_static_assert_typedef_, __LINE__) 143 #elif BOOST_WORKAROUND(__MWERKS__, <= 0x3003) 144 // special version for CodeWarrior <= 8.x 145 #define BOOST_STATIC_ASSERT( B ) \ 146 BOOST_STATIC_CONSTANT(int, \ 147 BOOST_JOIN(boost_static_assert_test_, __LINE__) = \ 148 sizeof(::boost::STATIC_ASSERTION_FAILURE< BOOST_STATIC_ASSERT_BOOL_CAST( B ) >) ) 149 #else 150 // generic version 151 # ifndef BOOST_NO_CXX11_VARIADIC_MACROS 152 # define BOOST_STATIC_ASSERT( ... ) \ 153 typedef ::boost::static_assert_test<\ 154 sizeof(::boost::STATIC_ASSERTION_FAILURE< BOOST_STATIC_ASSERT_BOOL_CAST( __VA_ARGS__ ) >)>\ 155 BOOST_JOIN(boost_static_assert_typedef_, __LINE__) BOOST_ATTRIBUTE_UNUSED 156 # else 157 # define BOOST_STATIC_ASSERT( B ) \ 158 typedef ::boost::static_assert_test<\ 159 sizeof(::boost::STATIC_ASSERTION_FAILURE< BOOST_STATIC_ASSERT_BOOL_CAST( B ) >)>\ 160 BOOST_JOIN(boost_static_assert_typedef_, __LINE__) BOOST_ATTRIBUTE_UNUSED 161 # endif 162 #endif 163 164 #else 165 // alternative enum based implementation: 166 # ifndef BOOST_NO_CXX11_VARIADIC_MACROS 167 # define BOOST_STATIC_ASSERT( ... ) \ 168 enum { BOOST_JOIN(boost_static_assert_enum_, __LINE__) \ 169 = sizeof(::boost::STATIC_ASSERTION_FAILURE< (bool)( __VA_ARGS__ ) >) } 170 # else 171 # define BOOST_STATIC_ASSERT(B) \ 172 enum { BOOST_JOIN(boost_static_assert_enum_, __LINE__) \ 173 = sizeof(::boost::STATIC_ASSERTION_FAILURE< (bool)( B ) >) } 174 # endif 175 #endif 176 #endif // defined(BOOST_NO_CXX11_STATIC_ASSERT) 177 178 #endif // BOOST_STATIC_ASSERT_HPP 179 180