1 // Copyright Louis Dionne 2013-2017
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)
5 #include <boost/hana/assert.hpp>
6 #include <boost/hana/at_key.hpp>
7 #include <boost/hana/equal.hpp>
8 #include <boost/hana/find.hpp>
9 #include <boost/hana/integral_constant.hpp>
10 #include <boost/hana/optional.hpp>
11 #include <boost/hana/set.hpp>
12 namespace hana = boost::hana;
16 constexpr auto xs = hana::make_set(hana::int_c<0>, hana::int_c<1>, hana::int_c<2>);
17 BOOST_HANA_CONSTANT_CHECK(hana::find(xs, hana::int_c<0>) == hana::just(hana::int_c<0>));
18 BOOST_HANA_CONSTANT_CHECK(hana::find(xs, hana::int_c<3>) == hana::nothing);
20 // operator[] is equivalent to at_key
21 BOOST_HANA_CONSTANT_CHECK(xs[hana::int_c<2>] == hana::int_c<2>);
23 // long_c<0> == int_<0>, and therefore int_<0> is found
24 BOOST_HANA_CONSTANT_CHECK(xs[hana::long_c<0>] == hana::int_c<0>);