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_if.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
__anonfb0e22580102(auto x) 13 BOOST_HANA_CONSTEXPR_LAMBDA auto negative = [](auto x) {
14 return x < 0;
15 };
16
__anonfb0e22580202(auto x) 17 BOOST_HANA_CONSTEXPR_LAMBDA auto negate = [](auto x) {
18 return -x;
19 };
20
main()21 int main() {
22 BOOST_HANA_CONSTEXPR_CHECK(
23 hana::adjust_if(hana::make_tuple(-3, -2, -1, 0, 1, 2, 3), negative, negate)
24 ==
25 hana::make_tuple(3, 2, 1, 0, 1, 2, 3)
26 );
27 }
28