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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/not.hpp> | |
7 | #include <boost/hana/optional.hpp> | |
8 | namespace hana = boost::hana; | |
9 | ||
10 | ||
11 | struct undefined { }; | |
12 | ||
13 | int main() { | |
14 | BOOST_HANA_CONSTANT_CHECK(hana::is_just(hana::just(undefined{}))); | |
15 | BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_just(hana::nothing))); | |
16 | } |