| 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/at_key.hpp> |
| 7 | #include <boost/hana/equal.hpp> |
| 8 | #include <boost/hana/find.hpp> |
| 9 | #include <boost/hana/integral_constant.hpp> |
| 10 | #include <boost/hana/optional.hpp> |
| 11 | #include <boost/hana/set.hpp> |
| 12 | namespace hana = boost::hana; |
| 13 | |
| 14 | |
| 15 | int main() { |
| 16 | constexpr auto xs = hana::make_set(hana::int_c<0>, hana::int_c<1>, hana::int_c<2>); |
| 17 | BOOST_HANA_CONSTANT_CHECK(hana::find(xs, hana::int_c<0>) == hana::just(hana::int_c<0>)); |
| 18 | BOOST_HANA_CONSTANT_CHECK(hana::find(xs, hana::int_c<3>) == hana::nothing); |
| 19 | |
| 20 | // operator[] is equivalent to at_key |
| 21 | BOOST_HANA_CONSTANT_CHECK(xs[hana::int_c<2>] == hana::int_c<2>); |
| 22 | |
| 23 | // long_c<0> == int_<0>, and therefore int_<0> is found |
| 24 | BOOST_HANA_CONSTANT_CHECK(xs[hana::long_c<0>] == hana::int_c<0>); |
| 25 | } |
| 26 |