| 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/equal.hpp> |
| 7 | #include <boost/hana/optional.hpp> |
| 8 | #include <boost/hana/unpack.hpp> |
| 9 | |
| 10 | #include <laws/base.hpp> |
| 11 | namespace hana = boost::hana; |
| 12 | |
| 13 | |
| 14 | int main() { |
| 15 | hana::test::ct_eq<2> x{}; |
| 16 | hana::test::_injection<0> f{}; |
| 17 | |
| 18 | BOOST_HANA_CONSTANT_CHECK(hana::equal( |
| 19 | hana::unpack(hana::nothing, f), |
| 20 | f() |
| 21 | )); |
| 22 | |
| 23 | BOOST_HANA_CONSTANT_CHECK(hana::equal( |
| 24 | hana::unpack(hana::just(x), f), |
| 25 | f(x) |
| 26 | )); |
| 27 | |
| 28 | // Previously, there was a bug that would make this fail. |
| 29 | auto non_const_nothing = hana::nothing; |
| 30 | BOOST_HANA_CONSTANT_CHECK(hana::equal( |
| 31 | hana::unpack(non_const_nothing, f), |
| 32 | f() |
| 33 | )); |
| 34 | } |
| 35 |