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/not_equal.hpp>
8#include <boost/hana/optional.hpp>
9namespace hana = boost::hana;
10
11
12BOOST_HANA_CONSTANT_CHECK(hana::nothing == hana::nothing);
13static_assert(hana::just('x') == hana::just('x'), "");
14static_assert(hana::just('x') != hana::just('y'), "");
15BOOST_HANA_CONSTANT_CHECK(hana::just('x') != hana::nothing);
16
17int main() { }
18

source code of boost/libs/hana/example/optional/comparable.cpp