1 #ifndef BOOST_MP11_FUNCTION_HPP_INCLUDED 2 #define BOOST_MP11_FUNCTION_HPP_INCLUDED 3 4 // Copyright 2015-2019 Peter Dimov. 5 // 6 // Distributed under the Boost Software License, Version 1.0. 7 // 8 // See accompanying file LICENSE_1_0.txt or copy at 9 // http://www.boost.org/LICENSE_1_0.txt 10 11 #include <boost/mp11/integral.hpp> 12 #include <boost/mp11/utility.hpp> 13 #include <boost/mp11/detail/mp_list.hpp> 14 #include <boost/mp11/detail/mp_count.hpp> 15 #include <boost/mp11/detail/mp_plus.hpp> 16 #include <boost/mp11/detail/mp_min_element.hpp> 17 #include <boost/mp11/detail/mp_void.hpp> 18 #include <boost/mp11/detail/config.hpp> 19 #include <type_traits> 20 21 namespace boost 22 { 23 namespace mp11 24 { 25 26 // mp_void<T...> 27 // in detail/mp_void.hpp 28 29 // mp_and<T...> 30 #if BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, < 1910 ) 31 32 namespace detail 33 { 34 35 template<class... T> struct mp_and_impl; 36 37 } // namespace detail 38 39 template<class... T> using mp_and = mp_to_bool< typename detail::mp_and_impl<T...>::type >; 40 41 namespace detail 42 { 43 44 template<> struct mp_and_impl<> 45 { 46 using type = mp_true; 47 }; 48 49 template<class T> struct mp_and_impl<T> 50 { 51 using type = T; 52 }; 53 54 template<class T1, class... T> struct mp_and_impl<T1, T...> 55 { 56 using type = mp_eval_if< mp_not<T1>, T1, mp_and, T... >; 57 }; 58 59 } // namespace detail 60 61 #else 62 63 namespace detail 64 { 65 66 template<class L, class E = void> struct mp_and_impl 67 { 68 using type = mp_false; 69 }; 70 71 template<class... T> struct mp_and_impl< mp_list<T...>, mp_void<mp_if<T, void>...> > 72 { 73 using type = mp_true; 74 }; 75 76 } // namespace detail 77 78 template<class... T> using mp_and = typename detail::mp_and_impl<mp_list<T...>>::type; 79 80 #endif 81 82 // mp_all<T...> 83 // https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86355 84 #if BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, < 1920 ) || BOOST_MP11_WORKAROUND( BOOST_MP11_GCC, != 0 ) 85 86 template<class... T> using mp_all = mp_bool< mp_count_if< mp_list<T...>, mp_not >::value == 0 >; 87 88 #else 89 90 template<class... T> using mp_all = mp_bool< mp_count< mp_list<mp_to_bool<T>...>, mp_false >::value == 0 >; 91 92 #endif 93 94 // mp_or<T...> 95 namespace detail 96 { 97 98 template<class... T> struct mp_or_impl; 99 100 } // namespace detail 101 102 template<class... T> using mp_or = mp_to_bool< typename detail::mp_or_impl<T...>::type >; 103 104 namespace detail 105 { 106 107 template<> struct mp_or_impl<> 108 { 109 using type = mp_false; 110 }; 111 112 template<class T> struct mp_or_impl<T> 113 { 114 using type = T; 115 }; 116 117 template<class T1, class... T> struct mp_or_impl<T1, T...> 118 { 119 using type = mp_eval_if< T1, T1, mp_or, T... >; 120 }; 121 122 } // namespace detail 123 124 // mp_any<T...> 125 // https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86356 126 #if BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, < 1920 ) || BOOST_MP11_WORKAROUND( BOOST_MP11_GCC, != 0 ) 127 128 template<class... T> using mp_any = mp_bool< mp_count_if< mp_list<T...>, mp_to_bool >::value != 0 >; 129 130 #else 131 132 template<class... T> using mp_any = mp_bool< mp_count< mp_list<mp_to_bool<T>...>, mp_true >::value != 0 >; 133 134 #endif 135 136 // mp_same<T...> 137 namespace detail 138 { 139 140 template<class... T> struct mp_same_impl; 141 142 template<> struct mp_same_impl<> 143 { 144 using type = mp_true; 145 }; 146 147 template<class T1, class... T> struct mp_same_impl<T1, T...> 148 { 149 using type = mp_bool< mp_count<mp_list<T...>, T1>::value == sizeof...(T) >; 150 }; 151 152 } // namespace detail 153 154 template<class... T> using mp_same = typename detail::mp_same_impl<T...>::type; 155 156 // mp_similar<T...> 157 namespace detail 158 { 159 160 template<class... T> struct mp_similar_impl; 161 162 template<> struct mp_similar_impl<> 163 { 164 using type = mp_true; 165 }; 166 167 template<class T> struct mp_similar_impl<T> 168 { 169 using type = mp_true; 170 }; 171 172 template<class T> struct mp_similar_impl<T, T> 173 { 174 using type = mp_true; 175 }; 176 177 template<class T1, class T2> struct mp_similar_impl<T1, T2> 178 { 179 using type = mp_false; 180 }; 181 182 template<template<class...> class L, class... T1, class... T2> struct mp_similar_impl<L<T1...>, L<T2...>> 183 { 184 using type = mp_true; 185 }; 186 187 template<template<class...> class L, class... T> struct mp_similar_impl<L<T...>, L<T...>> 188 { 189 using type = mp_true; 190 }; 191 192 template<class T1, class T2, class T3, class... T> struct mp_similar_impl<T1, T2, T3, T...> 193 { 194 using type = mp_all< typename mp_similar_impl<T1, T2>::type, typename mp_similar_impl<T1, T3>::type, typename mp_similar_impl<T1, T>::type... >; 195 }; 196 197 } // namespace detail 198 199 template<class... T> using mp_similar = typename detail::mp_similar_impl<T...>::type; 200 201 #if BOOST_MP11_GCC 202 # pragma GCC diagnostic push 203 //# pragma GCC diagnostic ignored "-Wsign-compare" 204 #endif 205 206 // mp_less<T1, T2> 207 template<class T1, class T2> using mp_less = mp_bool<(T1::value < 0 && T2::value >= 0) || ((T1::value < T2::value) && !(T1::value >= 0 && T2::value < 0))>; 208 209 #if BOOST_MP11_GCC 210 # pragma GCC diagnostic pop 211 #endif 212 213 // mp_min<T...> 214 template<class T1, class... T> using mp_min = mp_min_element<mp_list<T1, T...>, mp_less>; 215 216 // mp_max<T...> 217 template<class T1, class... T> using mp_max = mp_max_element<mp_list<T1, T...>, mp_less>; 218 219 } // namespace mp11 220 } // namespace boost 221 222 #endif // #ifndef BOOST_MP11_FUNCTION_HPP_INCLUDED 223