| 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/experimental/types.hpp> |
| 7 | #include <boost/hana/is_empty.hpp> |
| 8 | #include <boost/hana/not.hpp> |
| 9 | namespace hana = boost::hana; |
| 10 | |
| 11 | |
| 12 | template <int> struct x; |
| 13 | |
| 14 | int main() { |
| 15 | BOOST_HANA_CONSTANT_CHECK(hana::is_empty( |
| 16 | hana::experimental::types<>{} |
| 17 | )); |
| 18 | |
| 19 | BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_empty( |
| 20 | hana::experimental::types<x<0>>{} |
| 21 | ))); |
| 22 | |
| 23 | BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_empty( |
| 24 | hana::experimental::types<x<0>, x<1>>{} |
| 25 | ))); |
| 26 | |
| 27 | BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_empty( |
| 28 | hana::experimental::types<x<0>, x<1>, x<2>>{} |
| 29 | ))); |
| 30 | |
| 31 | BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_empty( |
| 32 | hana::experimental::types<x<0>, x<1>, x<2>, x<3>>{} |
| 33 | ))); |
| 34 | } |
| 35 |