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Diffstat (limited to 'src/boost/libs/hana/test/_include/auto/is_empty.hpp')
-rw-r--r-- | src/boost/libs/hana/test/_include/auto/is_empty.hpp | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/src/boost/libs/hana/test/_include/auto/is_empty.hpp b/src/boost/libs/hana/test/_include/auto/is_empty.hpp new file mode 100644 index 000000000..99ae879dd --- /dev/null +++ b/src/boost/libs/hana/test/_include/auto/is_empty.hpp @@ -0,0 +1,55 @@ +// 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 |