1 #ifndef BOOST_MP11_SET_HPP_INCLUDED
2 #define BOOST_MP11_SET_HPP_INCLUDED
4 // Copyright 2015, 2019 Peter Dimov.
6 // 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
11 #include <boost/mp11/utility.hpp>
12 #include <boost/mp11/function.hpp>
13 #include <boost/mp11/detail/mp_list.hpp>
14 #include <boost/mp11/detail/mp_append.hpp>
15 #include <boost/mp11/detail/mp_copy_if.hpp>
16 #include <boost/mp11/detail/mp_remove_if.hpp>
17 #include <boost/mp11/detail/mp_is_list.hpp>
18 #include <type_traits>
25 // mp_set_contains<S, V>
29 template<class S, class V> struct mp_set_contains_impl
33 template<template<class...> class L, class... T, class V> struct mp_set_contains_impl<L<T...>, V>
35 using type = mp_to_bool<std::is_base_of<mp_identity<V>, mp_inherit<mp_identity<T>...> > >;
40 template<class S, class V> using mp_set_contains = typename detail::mp_set_contains_impl<S, V>::type;
42 // mp_set_push_back<S, T...>
46 template<class S, class... T> struct mp_set_push_back_impl
50 template<template<class...> class L, class... U> struct mp_set_push_back_impl<L<U...>>
55 template<template<class...> class L, class... U, class T1, class... T> struct mp_set_push_back_impl<L<U...>, T1, T...>
57 using S = mp_if<mp_set_contains<L<U...>, T1>, L<U...>, L<U..., T1>>;
58 using type = typename mp_set_push_back_impl<S, T...>::type;
63 template<class S, class... T> using mp_set_push_back = typename detail::mp_set_push_back_impl<S, T...>::type;
65 // mp_set_push_front<S, T...>
69 template<class S, class... T> struct mp_set_push_front_impl
73 template<template<class...> class L, class... U> struct mp_set_push_front_impl<L<U...>>
78 template<template<class...> class L, class... U, class T1> struct mp_set_push_front_impl<L<U...>, T1>
80 using type = mp_if<mp_set_contains<L<U...>, T1>, L<U...>, L<T1, U...>>;
83 template<template<class...> class L, class... U, class T1, class... T> struct mp_set_push_front_impl<L<U...>, T1, T...>
85 using S = typename mp_set_push_front_impl<L<U...>, T...>::type;
86 using type = typename mp_set_push_front_impl<S, T1>::type;
91 template<class S, class... T> using mp_set_push_front = typename detail::mp_set_push_front_impl<S, T...>::type;
97 template<class S> struct mp_is_set_impl
99 using type = mp_false;
102 template<template<class...> class L, class... T> struct mp_is_set_impl<L<T...>>
104 using type = mp_to_bool<std::is_same<mp_list<T...>, mp_set_push_back<mp_list<>, T...> > >;
107 } // namespace detail
109 template<class S> using mp_is_set = typename detail::mp_is_set_impl<S>::type;
111 // mp_set_union<L...>
115 template<class... L> struct mp_set_union_impl
119 template<> struct mp_set_union_impl<>
121 using type = mp_list<>;
124 template<template<class...> class L, class... T> struct mp_set_union_impl<L<T...>>
126 using type = L<T...>;
129 template<template<class...> class L1, class... T1, template<class...> class L2, class... T2> struct mp_set_union_impl<L1<T1...>, L2<T2...>>
131 using type = mp_set_push_back<L1<T1...>, T2...>;
134 template<class L1, class... L> using mp_set_union_ = typename mp_set_union_impl<L1, mp_append<mp_list<>, L...>>::type;
136 template<class L1, class L2, class L3, class... L> struct mp_set_union_impl<L1, L2, L3, L...>: mp_defer<mp_set_union_, L1, L2, L3, L...>
140 } // namespace detail
142 template<class... L> using mp_set_union = typename detail::mp_set_union_impl<L...>::type;
144 // mp_set_intersection<S...>
148 template<class... S> struct in_all_sets
150 template<class T> using fn = mp_all< mp_set_contains<S, T>... >;
153 template<class L, class... S> using mp_set_intersection_ = mp_if< mp_all<mp_is_list<S>...>, mp_copy_if_q<L, detail::in_all_sets<S...>> >;
155 template<class... S> struct mp_set_intersection_impl
159 template<> struct mp_set_intersection_impl<>
161 using type = mp_list<>;
164 template<class L, class... S> struct mp_set_intersection_impl<L, S...>: mp_defer<mp_set_intersection_, L, S...>
168 } // namespace detail
170 template<class... S> using mp_set_intersection = typename detail::mp_set_intersection_impl<S...>::type;
172 // mp_set_difference<L, S...>
176 template<class... S> struct in_any_set
178 template<class T> using fn = mp_any< mp_set_contains<S, T>... >;
181 } // namespace detail
183 template<class L, class... S> using mp_set_difference = mp_if< mp_all<mp_is_list<S>...>, mp_remove_if_q<L, detail::in_any_set<S...>> >;
188 #endif // #ifndef BOOST_MP11_SET_HPP_INCLUDED