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f51cf556 | 1 | // Copyright Louis Dionne 2013-2022 |
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/ap.hpp> | |
6 | #include <boost/hana/assert.hpp> | |
7 | #include <boost/hana/config.hpp> | |
8 | #include <boost/hana/equal.hpp> | |
9 | #include <boost/hana/optional.hpp> | |
10 | #include <boost/hana/tuple.hpp> | |
11 | ||
12 | #include <functional> | |
13 | namespace hana = boost::hana; | |
14 | ||
15 | ||
16 | int main() { | |
17 | // with tuples | |
18 | static_assert( | |
19 | hana::ap(hana::make_tuple(std::plus<>{}), hana::make_tuple(1, 2), | |
20 | hana::make_tuple(3, 4, 5)) | |
21 | == | |
22 | hana::make_tuple( | |
23 | 1 + 3, 1 + 4, 1 + 5, | |
24 | 2 + 3, 2 + 4, 2 + 5 | |
25 | ) | |
26 | , ""); | |
27 | ||
28 | // with optional values | |
29 | BOOST_HANA_CONSTEXPR_LAMBDA auto multiply = [](auto a, auto b, auto c) { | |
30 | return a * b * c; | |
31 | }; | |
32 | ||
33 | BOOST_HANA_CONSTEXPR_CHECK( | |
34 | hana::ap(hana::just(multiply), hana::just(1), | |
35 | hana::just(2), | |
36 | hana::just(3)) | |
37 | == | |
38 | hana::just(1 * 2 * 3) | |
39 | ); | |
40 | ||
41 | BOOST_HANA_CONSTANT_CHECK( | |
42 | hana::ap(hana::just(multiply), hana::just(1), | |
43 | hana::nothing, | |
44 | hana::just(3)) | |
45 | == | |
46 | hana::nothing | |
47 | ); | |
48 | } |