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Add mp_set_union

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Peter Dimov
2019-01-07 06:50:51 +02:00
parent c61d99db87
commit 08444e4587
6 changed files with 137 additions and 7 deletions
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42
include/boost/mp11/set.hpp
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@@ -1,15 +1,16 @@
#ifndef BOOST_MP11_SET_HPP_INCLUDED
#define BOOST_MP11_SET_HPP_INCLUDED
// Copyright 2015 Peter Dimov.
// Copyright 2015, 2019 Peter Dimov.
//
// Distributed under the Boost Software License, Version 1.0.
// Distributed under the Boost Software License, Version 1.0.
//
// See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt
// See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt
#include <boost/mp11/utility.hpp>
#include <boost/mp11/detail/mp_list.hpp>
#include <boost/mp11/detail/mp_append.hpp>
#include <type_traits>
namespace boost
@@ -97,6 +98,39 @@ template<template<class...> class L, class... T> struct mp_is_set_impl<L<T...>>
template<class S> using mp_is_set = typename detail::mp_is_set_impl<S>::type;
// mp_set_union<L...>
namespace detail
{
template<class... L> struct mp_set_union_impl
{
};
template<> struct mp_set_union_impl<>
{
using type = mp_list<>;
};
template<template<class...> class L, class... T> struct mp_set_union_impl<L<T...>>
{
using type = L<T...>;
};
template<template<class...> class L1, class... T1, template<class...> class L2, class... T2> struct mp_set_union_impl<L1<T1...>, L2<T2...>>
{
using type = mp_set_push_back<L1<T1...>, T2...>;
};
template<class L1, class... L> using mp_set_union_ = typename mp_set_union_impl<L1, mp_append<mp_list<>, L...>>::type;
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...>
{
};
} // namespace detail
template<class... L> using mp_set_union = typename detail::mp_set_union_impl<L...>::type;
} // namespace mp11
} // namespace boost