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/assert.hpp> 6 #include <boost/hana/equal.hpp> 7 #include <boost/hana/ext/boost/fusion/tuple.hpp> 8 #include <boost/hana/integral_constant.hpp> 9 #include <boost/hana/transform.hpp> 10 11 #include <boost/fusion/include/make_tuple.hpp> 12 #include <boost/fusion/include/tuple.hpp> 13 14 #include <string> 15 namespace fusion = boost::fusion; 16 namespace hana = boost::hana; 17 18 19 struct Fish { std::string name; }; 20 struct Cat { std::string name; }; 21 struct Dog { std::string name; }; 22 main()23int main() { 24 fusion::tuple<Fish, Cat, Dog> animals{Fish{"Nemo"}, Cat{"Garfield"}, Dog{"Snoopy"}}; 25 hana::front(animals).name = "Moby Dick"; 26 27 auto names = hana::transform(animals, [](auto a) { 28 return a.name; 29 }); 30 31 BOOST_HANA_RUNTIME_CHECK(hana::equal( 32 names, 33 fusion::make_tuple("Moby Dick", "Garfield", "Snoopy") 34 )); 35 } 36