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/functional/lockstep.hpp> 6 #include <boost/hana/plus.hpp> 7 namespace hana = boost::hana; 8 9 to_int(char c)10constexpr int to_int(char c) { 11 return static_cast<int>(c) - 48; 12 } 13 increment(int i)14constexpr int increment(int i) { 15 return i + 1; 16 } 17 18 static_assert(hana::lockstep(hana::plus)(to_int, increment)('3', 4) == 3 + 5, ""); 19 main()20int main() { } 21