hana/example/ext/std/tuple.cpp

/*
@copyright Louis Dionne 2015
Distributed under the Boost Software License, Version 1.0.
(See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
 */

#include <boost/hana/assert.hpp>
#include <boost/hana/equal.hpp>
#include <boost/hana/ext/std/tuple.hpp>
#include <boost/hana/integral_constant.hpp>
#include <boost/hana/transform.hpp>

#include <string>
#include <tuple>
namespace hana = boost::hana;


struct Fish { std::string name; };
struct Cat  { std::string name; };
struct Dog  { std::string name; };

int main() {
    std::tuple<Fish, Cat, Dog> animals{{"Nemo"}, {"Garfield"}, {"Snoopy"}};
    hana::front(animals).name = "Moby Dick";

    auto names = hana::transform(animals, [](auto a) {
      return a.name;
    });

    BOOST_HANA_RUNTIME_CHECK(hana::equal(
        names,
        std::make_tuple("Moby Dick", "Garfield", "Snoopy")
    ));
}