| 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/fold_left.hpp> |
| 8 | #include <boost/hana/optional.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::ct_eq<3> s{}; |
| 17 | hana::test::_injection<0> f{}; |
| 18 | |
| 19 | BOOST_HANA_CONSTANT_CHECK(hana::equal( |
| 20 | hana::fold_left(hana::just(x), s, f), |
| 21 | f(s, x) |
| 22 | )); |
| 23 | |
| 24 | BOOST_HANA_CONSTANT_CHECK(hana::equal( |
| 25 | hana::fold_left(hana::nothing, s, f), |
| 26 | s |
| 27 | )); |
| 28 | } |
| 29 |