1 // Copyright Louis Dionne 2013-2017
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/is_empty.hpp>
7 #include <boost/hana/not.hpp>
8 #include <boost/hana/tuple.hpp>
9 namespace hana = boost::hana;
10
11
12 struct x0;
13 struct x1;
14 struct x2;
15
main()16 int main() {
17 // tuple_t
18 BOOST_HANA_CONSTANT_CHECK(hana::is_empty(hana::tuple_t<>));
19 BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_empty(hana::tuple_t<x0>)));
20 BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_empty(hana::tuple_t<x0, x1>)));
21 BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_empty(hana::tuple_t<x0, x1, x2>)));
22
23 // tuple_c
24 BOOST_HANA_CONSTANT_CHECK(hana::is_empty(hana::tuple_c<int>));
25 BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_empty(hana::tuple_c<int, 0>)));
26 BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_empty(hana::tuple_c<int, 0, 1>)));
27 BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_empty(hana::tuple_c<int, 0, 1, 2>)));
28 }
29