1// Copyright Louis Dionne 2013-2022
2// Distributed under the Boost Software License, Version 1.0.
3// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
4
5#include <boost/hana/assert.hpp>
6#include <boost/hana/equal.hpp>
7#include <boost/hana/integral_constant.hpp>
8#include <boost/hana/set.hpp>
9#include <boost/hana/string.hpp>
10#include <boost/hana/type.hpp>
11#include <boost/hana/union.hpp>
12namespace hana = boost::hana;
13using namespace hana::literals;
14
15
16constexpr auto xs = hana::make_set(hana::int_c<1>, hana::type_c<void>, hana::int_c<2>);
17constexpr auto ys = hana::make_set(hana::int_c<2>, hana::type_c<int>, hana::int_c<3>);
18
19BOOST_HANA_CONSTANT_CHECK(hana::union_(xs, ys) == hana::make_set(
20 hana::int_c<1>, hana::int_c<2>, hana::int_c<3>, hana::type_c<void>, hana::type_c<int>
21));
22
23int main() { }
24

source code of boost/libs/hana/example/set/union.cpp