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Add mp_set_difference

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This commit is contained in:
Peter Dimov
2019-01-07 21:02:30 +02:00
parent a9b36f58ae
commit 3a31eeee29
3 changed files with 64 additions and 0 deletions
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15
include/boost/mp11/set.hpp
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@ -9,8 +9,10 @@
// http://www.boost.org/LICENSE_1_0.txt
#include <boost/mp11/utility.hpp>
#include <boost/mp11/function.hpp>
#include <boost/mp11/detail/mp_list.hpp>
#include <boost/mp11/detail/mp_append.hpp>
#include <boost/mp11/detail/mp_remove_if.hpp>
#include <type_traits>
namespace boost
@ -131,6 +133,19 @@ template<class L1, class L2, class L3, class... L> struct mp_set_union_impl<L1,
template<class... L> using mp_set_union = typename detail::mp_set_union_impl<L...>::type;
// mp_set_difference<L, S...>
namespace detail
{
template<class... S> struct in_any_set
{
template<class T> using fn = mp_any< mp_set_contains<S, T>... >;
};
} // namespace detail
template<class L, class... S> using mp_set_difference = mp_remove_if_q<L, detail::in_any_set<S...>>;
} // namespace mp11
} // namespace boost

1
test/Jamfile
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@ -135,6 +135,7 @@ run mp_set_push_front.cpp ;
run mp_is_set.cpp ;
run mp_set_union.cpp ;
run mp_set_union_sf.cpp ;
run mp_set_difference.cpp ;
# function
run mp_all.cpp ;

48
test/mp_set_difference.cpp Normal file
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@ -0,0 +1,48 @@
// Copyright 2019 Peter Dimov.
//
// 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
#include <boost/mp11/set.hpp>
#include <boost/mp11/list.hpp>
#include <boost/core/lightweight_test_trait.hpp>
#include <type_traits>
#include <tuple>
#include <utility>
int main()
{
using boost::mp11::mp_list;
using boost::mp11::mp_set_difference;
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_set_difference<mp_list<>>, mp_list<>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_set_difference<mp_list<void>>, mp_list<void>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_set_difference<mp_list<void, int>>, mp_list<void, int>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_set_difference<mp_list<void, int, float>>, mp_list<void, int, float>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_set_difference<std::tuple<>, std::pair<float, int>>, std::tuple<>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_set_difference<std::tuple<void>, std::pair<float, int>>, std::tuple<void>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_set_difference<std::tuple<void, int>, std::pair<float, int>>, std::tuple<void>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_set_difference<std::tuple<void, int, float>, std::pair<float, int>>, std::tuple<void>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_set_difference<mp_list<void, int, float>, std::tuple<>>, mp_list<void, int, float>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_set_difference<mp_list<void, int, float>, std::tuple<int>>, mp_list<void, float>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_set_difference<mp_list<void, int, float>, std::tuple<float, void>>, mp_list<int>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_set_difference<mp_list<void, int, float>, std::tuple<float, void, int>>, mp_list<>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_set_difference<std::tuple<>, mp_list<>, std::pair<float, int>>, std::tuple<>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_set_difference<std::tuple<void>, mp_list<double>, std::pair<float, int>>, std::tuple<void>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_set_difference<std::tuple<void, int>, mp_list<double, int>, std::pair<float, int>>, std::tuple<void>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_set_difference<std::tuple<void, int, float>, mp_list<double, int, float>, std::pair<float, int>>, std::tuple<void>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_set_difference<mp_list<void, int, float, double>, std::pair<double, void>, std::tuple<>>, mp_list<int, float>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_set_difference<mp_list<void, int, float, double>, std::pair<double, void>, std::tuple<int>>, mp_list<float>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_set_difference<mp_list<void, int, float, double>, std::pair<double, void>, std::tuple<float, void>>, mp_list<int>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_set_difference<mp_list<void, int, float, double>, std::pair<double, void>, std::tuple<float, void, int>>, mp_list<>>));
return boost::report_errors();
}