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b32b8144 | 1 | // Copyright Louis Dionne 2013-2017 |
7c673cae FG |
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/chain.hpp> | |
7 | #include <boost/hana/config.hpp> | |
8 | #include <boost/hana/equal.hpp> | |
9 | #include <boost/hana/flatten.hpp> | |
10 | #include <boost/hana/optional.hpp> | |
11 | namespace hana = boost::hana; | |
12 | ||
13 | ||
14 | int main() { | |
15 | BOOST_HANA_CONSTEXPR_LAMBDA auto inc = [](auto x) { | |
16 | return hana::just(x + 1); | |
17 | }; | |
18 | ||
19 | BOOST_HANA_CONSTEXPR_CHECK(hana::chain(hana::just(1), inc) == hana::just(2)); | |
20 | BOOST_HANA_CONSTANT_CHECK(hana::chain(hana::nothing, inc) == hana::nothing); | |
21 | ||
22 | BOOST_HANA_CONSTEXPR_CHECK(hana::flatten(hana::just(hana::just(2))) == hana::just(2)); | |
23 | } |