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1 | // Copyright Louis Dionne 2013-2017 | |
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/adjust.hpp> | |
6 | #include <boost/hana/assert.hpp> | |
7 | #include <boost/hana/config.hpp> | |
8 | #include <boost/hana/equal.hpp> | |
9 | #include <boost/hana/tuple.hpp> | |
10 | namespace hana = boost::hana; | |
11 | ||
12 | ||
13 | BOOST_HANA_CONSTEXPR_LAMBDA auto negate = [](auto x) { | |
14 | return -x; | |
15 | }; | |
16 | ||
17 | int main() { | |
18 | BOOST_HANA_CONSTEXPR_CHECK( | |
19 | hana::adjust(hana::make_tuple(1, 4, 9, 2, 3, 4), 4, negate) | |
20 | == | |
21 | hana::make_tuple(1, -4, 9, 2, 3, -4) | |
22 | ); | |
23 | } |