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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)
#ifndef BOOST_HANA_TEST_AUTO_IS_EMPTY_HPP
#define BOOST_HANA_TEST_AUTO_IS_EMPTY_HPP
#include <boost/hana/assert.hpp>
#include <boost/hana/is_empty.hpp>
#include <boost/hana/not.hpp>
#include "test_case.hpp"
namespace _test_is_empty_detail { template <int i> struct undefined { }; }
TestCase test_is_empty{[]{
namespace hana = boost::hana;
using _test_is_empty_detail::undefined;
BOOST_HANA_CONSTANT_CHECK(hana::is_empty(
MAKE_TUPLE()
));
BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_empty(
MAKE_TUPLE(undefined<0>{})
)));
BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_empty(
MAKE_TUPLE(undefined<0>{}, undefined<1>{})
)));
BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_empty(
MAKE_TUPLE(undefined<0>{}, undefined<1>{}, undefined<2>{})
)));
BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_empty(
MAKE_TUPLE(undefined<0>{}, undefined<1>{}, undefined<2>{}, undefined<3>{})
)));
// Check with a runtime value
{
int i = 3; // <- runtime value
BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_empty(MAKE_TUPLE(i))));
BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_empty(MAKE_TUPLE(i, i))));
}
#ifndef MAKE_TUPLE_NO_CONSTEXPR
static_assert(hana::is_empty(MAKE_TUPLE()), "");
static_assert(hana::not_(hana::is_empty(MAKE_TUPLE(undefined<0>{}))), "");
static_assert(hana::not_(hana::is_empty(MAKE_TUPLE(undefined<0>{}, undefined<1>{}))), "");
#endif
}};
#endif // !BOOST_HANA_TEST_AUTO_IS_EMPTY_HPP
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