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// 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/type.hpp>
#include <type_traits>
namespace hana = boost::hana;
// This test checks that the unary + operator on types works as expected.
// The unary + operator is supposed to turn a reference to a hana::type
// object into an equivalent prvalue.
struct T;
int main() {
auto& ref = hana::type_c<T>;
auto const& cref = hana::type_c<T>;
auto&& rref = hana::type_c<T>;
auto val = hana::type_c<T>;
BOOST_HANA_CONSTANT_CHECK(hana::equal(val, +val));
BOOST_HANA_CONSTANT_CHECK(hana::equal(val, +ref));
BOOST_HANA_CONSTANT_CHECK(hana::equal(val, +cref));
BOOST_HANA_CONSTANT_CHECK(hana::equal(val, +rref));
static_assert(!std::is_reference<decltype(+val)>{}, "");
static_assert(!std::is_reference<decltype(+ref)>{}, "");
static_assert(!std::is_reference<decltype(+cref)>{}, "");
static_assert(!std::is_reference<decltype(+rref)>{}, "");
using T1 = decltype(+val)::type;
using T2 = decltype(+ref)::type;
using T3 = decltype(+cref)::type;
using T4 = decltype(+rref)::type;
}
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