// Copyright Louis Dionne 2013-2017
// 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/core/to.hpp>
#include <boost/hana/map.hpp>
#include <boost/hana/pair.hpp>
#include <boost/hana/tuple.hpp>
#include <boost/hana/type.hpp>

#include <string>
namespace hana = boost::hana;
using namespace std::literals;


int main() {
    auto xs = hana::make_tuple(
        hana::make_pair(hana::type_c<int>, "abcd"s),
        hana::make_pair(hana::type_c<void>, 1234),
        hana::make_pair(hana::type_c<int>, nullptr)
    );

    BOOST_HANA_RUNTIME_CHECK(
        hana::to<hana::map_tag>(xs) == hana::make_map(
            hana::make_pair(hana::type_c<int>, "abcd"s),
            hana::make_pair(hana::type_c<void>, 1234)
        )
    );
}