src/boost/libs/hana/example/struct/keys.cpp


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// 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/define_struct.hpp>
#include <boost/hana/equal.hpp>
#include <boost/hana/keys.hpp>
#include <boost/hana/string.hpp>
#include <boost/hana/tuple.hpp>

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


struct Person {
    BOOST_HANA_DEFINE_STRUCT(Person,
        (std::string, name),
        (unsigned short, age)
    );
};

int main() {
    Person john{"John", 30};
    BOOST_HANA_CONSTANT_CHECK(
        hana::keys(john) == hana::make_tuple(BOOST_HANA_STRING("name"),
                                             BOOST_HANA_STRING("age"))
    );
}