Jeff Thompson | f7d4994 | 2013-08-01 16:47:40 -0700 | [diff] [blame] | 1 | |
| 2 | // (C) Copyright Dave Abrahams, Steve Cleary, Beman Dawes, Howard |
| 3 | // Hinnant & John Maddock 2000. |
| 4 | // Use, modification and distribution are subject to the Boost Software License, |
| 5 | // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
| 6 | // http://www.boost.org/LICENSE_1_0.txt). |
| 7 | // |
| 8 | // See http://www.boost.org/libs/type_traits for most recent version including documentation. |
| 9 | |
| 10 | |
| 11 | #ifndef BOOST_TT_IS_ENUM_HPP_INCLUDED |
| 12 | #define BOOST_TT_IS_ENUM_HPP_INCLUDED |
| 13 | |
Jeff Thompson | 2277ce5 | 2013-08-01 17:34:11 -0700 | [diff] [blame] | 14 | #include <ndnboost/type_traits/intrinsics.hpp> |
Jeff Thompson | f7d4994 | 2013-08-01 16:47:40 -0700 | [diff] [blame] | 15 | #ifndef BOOST_IS_ENUM |
Jeff Thompson | 2277ce5 | 2013-08-01 17:34:11 -0700 | [diff] [blame] | 16 | #include <ndnboost/type_traits/add_reference.hpp> |
| 17 | #include <ndnboost/type_traits/is_arithmetic.hpp> |
| 18 | #include <ndnboost/type_traits/is_reference.hpp> |
| 19 | #include <ndnboost/type_traits/is_convertible.hpp> |
| 20 | #include <ndnboost/type_traits/is_array.hpp> |
Jeff Thompson | f7d4994 | 2013-08-01 16:47:40 -0700 | [diff] [blame] | 21 | #ifdef __GNUC__ |
Jeff Thompson | 2277ce5 | 2013-08-01 17:34:11 -0700 | [diff] [blame] | 22 | #include <ndnboost/type_traits/is_function.hpp> |
Jeff Thompson | f7d4994 | 2013-08-01 16:47:40 -0700 | [diff] [blame] | 23 | #endif |
Jeff Thompson | 2277ce5 | 2013-08-01 17:34:11 -0700 | [diff] [blame] | 24 | #include <ndnboost/type_traits/config.hpp> |
Jeff Thompson | f7d4994 | 2013-08-01 16:47:40 -0700 | [diff] [blame] | 25 | #if defined(BOOST_TT_HAS_CONFORMING_IS_CLASS_IMPLEMENTATION) |
Jeff Thompson | 2277ce5 | 2013-08-01 17:34:11 -0700 | [diff] [blame] | 26 | # include <ndnboost/type_traits/is_class.hpp> |
| 27 | # include <ndnboost/type_traits/is_union.hpp> |
Jeff Thompson | f7d4994 | 2013-08-01 16:47:40 -0700 | [diff] [blame] | 28 | #endif |
| 29 | #endif |
| 30 | |
| 31 | // should be the last #include |
Jeff Thompson | 2277ce5 | 2013-08-01 17:34:11 -0700 | [diff] [blame] | 32 | #include <ndnboost/type_traits/detail/bool_trait_def.hpp> |
Jeff Thompson | f7d4994 | 2013-08-01 16:47:40 -0700 | [diff] [blame] | 33 | |
| 34 | namespace ndnboost { |
| 35 | |
| 36 | #ifndef BOOST_IS_ENUM |
| 37 | #if !(defined(__BORLANDC__) && (__BORLANDC__ <= 0x551)) |
| 38 | |
| 39 | namespace detail { |
| 40 | |
| 41 | #if defined(BOOST_TT_HAS_CONFORMING_IS_CLASS_IMPLEMENTATION) |
| 42 | |
| 43 | template <typename T> |
| 44 | struct is_class_or_union |
| 45 | { |
| 46 | BOOST_STATIC_CONSTANT(bool, value = |
| 47 | (::ndnboost::type_traits::ice_or< |
| 48 | ::ndnboost::is_class<T>::value |
| 49 | , ::ndnboost::is_union<T>::value |
| 50 | >::value)); |
| 51 | }; |
| 52 | |
| 53 | #else |
| 54 | |
| 55 | template <typename T> |
| 56 | struct is_class_or_union |
| 57 | { |
| 58 | # if BOOST_WORKAROUND(BOOST_MSVC, < 1300) || BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x581))// we simply can't detect it this way. |
| 59 | BOOST_STATIC_CONSTANT(bool, value = false); |
| 60 | # else |
| 61 | template <class U> static ::ndnboost::type_traits::yes_type is_class_or_union_tester(void(U::*)(void)); |
| 62 | |
| 63 | # if BOOST_WORKAROUND(BOOST_MSVC, == 1300) \ |
| 64 | || BOOST_WORKAROUND(__MWERKS__, <= 0x3000) // no SFINAE |
| 65 | static ::ndnboost::type_traits::no_type is_class_or_union_tester(...); |
| 66 | BOOST_STATIC_CONSTANT( |
| 67 | bool, value = sizeof(is_class_or_union_tester(0)) == sizeof(::ndnboost::type_traits::yes_type)); |
| 68 | # else |
| 69 | template <class U> |
| 70 | static ::ndnboost::type_traits::no_type is_class_or_union_tester(...); |
| 71 | BOOST_STATIC_CONSTANT( |
| 72 | bool, value = sizeof(is_class_or_union_tester<T>(0)) == sizeof(::ndnboost::type_traits::yes_type)); |
| 73 | # endif |
| 74 | # endif |
| 75 | }; |
| 76 | #endif |
| 77 | |
| 78 | struct int_convertible |
| 79 | { |
| 80 | int_convertible(int); |
| 81 | }; |
| 82 | |
| 83 | // Don't evaluate convertibility to int_convertible unless the type |
| 84 | // is non-arithmetic. This suppresses warnings with GCC. |
| 85 | template <bool is_typename_arithmetic_or_reference = true> |
| 86 | struct is_enum_helper |
| 87 | { |
| 88 | template <typename T> struct type |
| 89 | { |
| 90 | BOOST_STATIC_CONSTANT(bool, value = false); |
| 91 | }; |
| 92 | }; |
| 93 | |
| 94 | template <> |
| 95 | struct is_enum_helper<false> |
| 96 | { |
| 97 | template <typename T> struct type |
| 98 | : public ::ndnboost::is_convertible<typename ndnboost::add_reference<T>::type,::ndnboost::detail::int_convertible> |
| 99 | { |
| 100 | }; |
| 101 | }; |
| 102 | |
| 103 | template <typename T> struct is_enum_impl |
| 104 | { |
| 105 | //typedef ::ndnboost::add_reference<T> ar_t; |
| 106 | //typedef typename ar_t::type r_type; |
| 107 | |
| 108 | #if defined(__GNUC__) |
| 109 | |
| 110 | #ifdef BOOST_TT_HAS_CONFORMING_IS_CLASS_IMPLEMENTATION |
| 111 | |
| 112 | // We MUST check for is_class_or_union on conforming compilers in |
| 113 | // order to correctly deduce that noncopyable types are not enums |
| 114 | // (dwa 2002/04/15)... |
| 115 | BOOST_STATIC_CONSTANT(bool, selector = |
| 116 | (::ndnboost::type_traits::ice_or< |
| 117 | ::ndnboost::is_arithmetic<T>::value |
| 118 | , ::ndnboost::is_reference<T>::value |
| 119 | , ::ndnboost::is_function<T>::value |
| 120 | , is_class_or_union<T>::value |
| 121 | , is_array<T>::value |
| 122 | >::value)); |
| 123 | #else |
| 124 | // ...however, not checking is_class_or_union on non-conforming |
| 125 | // compilers prevents a dependency recursion. |
| 126 | BOOST_STATIC_CONSTANT(bool, selector = |
| 127 | (::ndnboost::type_traits::ice_or< |
| 128 | ::ndnboost::is_arithmetic<T>::value |
| 129 | , ::ndnboost::is_reference<T>::value |
| 130 | , ::ndnboost::is_function<T>::value |
| 131 | , is_array<T>::value |
| 132 | >::value)); |
| 133 | #endif // BOOST_TT_HAS_CONFORMING_IS_CLASS_IMPLEMENTATION |
| 134 | |
| 135 | #else // !defined(__GNUC__): |
| 136 | |
| 137 | BOOST_STATIC_CONSTANT(bool, selector = |
| 138 | (::ndnboost::type_traits::ice_or< |
| 139 | ::ndnboost::is_arithmetic<T>::value |
| 140 | , ::ndnboost::is_reference<T>::value |
| 141 | , is_class_or_union<T>::value |
| 142 | , is_array<T>::value |
| 143 | >::value)); |
| 144 | |
| 145 | #endif |
| 146 | |
| 147 | #if BOOST_WORKAROUND(__BORLANDC__, < 0x600) |
| 148 | typedef ::ndnboost::detail::is_enum_helper< |
| 149 | ::ndnboost::detail::is_enum_impl<T>::selector |
| 150 | > se_t; |
| 151 | #else |
| 152 | typedef ::ndnboost::detail::is_enum_helper<selector> se_t; |
| 153 | #endif |
| 154 | |
| 155 | typedef typename se_t::template type<T> helper; |
| 156 | BOOST_STATIC_CONSTANT(bool, value = helper::value); |
| 157 | }; |
| 158 | |
| 159 | // these help on compilers with no partial specialization support: |
| 160 | BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_enum,void,false) |
| 161 | #ifndef BOOST_NO_CV_VOID_SPECIALIZATIONS |
| 162 | BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_enum,void const,false) |
| 163 | BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_enum,void volatile,false) |
| 164 | BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_enum,void const volatile,false) |
| 165 | #endif |
| 166 | |
| 167 | } // namespace detail |
| 168 | |
| 169 | BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_enum,T,::ndnboost::detail::is_enum_impl<T>::value) |
| 170 | |
| 171 | #else // __BORLANDC__ |
| 172 | // |
| 173 | // buggy is_convertible prevents working |
| 174 | // implementation of is_enum: |
| 175 | BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_enum,T,false) |
| 176 | |
| 177 | #endif |
| 178 | |
| 179 | #else // BOOST_IS_ENUM |
| 180 | |
| 181 | BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_enum,T,BOOST_IS_ENUM(T)) |
| 182 | |
| 183 | #endif |
| 184 | |
| 185 | } // namespace ndnboost |
| 186 | |
Jeff Thompson | 2277ce5 | 2013-08-01 17:34:11 -0700 | [diff] [blame] | 187 | #include <ndnboost/type_traits/detail/bool_trait_undef.hpp> |
Jeff Thompson | f7d4994 | 2013-08-01 16:47:40 -0700 | [diff] [blame] | 188 | |
| 189 | #endif // BOOST_TT_IS_ENUM_HPP_INCLUDED |