hana/test/optional/operator_deref.cpp
2017-01-07 14:14:18 -08:00

34 lines
828 B
C++

// Copyright Louis Dionne 2013-2017
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
#include <boost/hana/assert.hpp>
#include <boost/hana/equal.hpp>
#include <boost/hana/optional.hpp>
#include <laws/base.hpp>
namespace hana = boost::hana;
using hana::test::ct_eq;
int main() {
auto lvalue = hana::just(ct_eq<3>{});
ct_eq<3>& ref = *lvalue;
BOOST_HANA_CONSTANT_CHECK(hana::equal(
ref,
ct_eq<3>{}
));
auto const const_lvalue = hana::just(ct_eq<3>{});
ct_eq<3> const& const_ref = *const_lvalue;
BOOST_HANA_CONSTANT_CHECK(hana::equal(
const_ref,
ct_eq<3>{}
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
*hana::just(ct_eq<3>{}),
ct_eq<3>{}
));
}