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/fold_left.hpp> 6 #include <boost/hana/fold_right.hpp> 7 #include <boost/hana/minus.hpp> 8 #include <boost/hana/pair.hpp> 9 #include <boost/hana/plus.hpp> 10 namespace hana = boost::hana; 11 12 13 static_assert(hana::fold_left(hana::make_pair(1, 3), 0, hana::plus) == 4, ""); 14 static_assert(hana::fold_right(hana::make_pair(1, 3), 0, hana::minus) == -2, ""); 15 main()16int main() { } 17