43 lines
1.2 KiB
C++
43 lines
1.2 KiB
C++
// 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/accessors.hpp>
|
|
#include <boost/hana/assert.hpp>
|
|
#include <boost/hana/at.hpp>
|
|
#include <boost/hana/define_struct.hpp>
|
|
#include <boost/hana/equal.hpp>
|
|
#include <boost/hana/first.hpp>
|
|
#include <boost/hana/integral_constant.hpp>
|
|
#include <boost/hana/second.hpp>
|
|
#include <boost/hana/string.hpp>
|
|
|
|
#include <string>
|
|
namespace hana = boost::hana;
|
|
|
|
|
|
struct Person {
|
|
BOOST_HANA_DEFINE_STRUCT(Person,
|
|
(std::string, name),
|
|
(unsigned short, age)
|
|
);
|
|
};
|
|
|
|
int main() {
|
|
constexpr auto accessors = hana::accessors<Person>();
|
|
BOOST_HANA_CONSTANT_CHECK(
|
|
hana::first(accessors[hana::size_c<0>]) == BOOST_HANA_STRING("name")
|
|
);
|
|
|
|
BOOST_HANA_CONSTANT_CHECK(
|
|
hana::first(accessors[hana::size_c<1>]) == BOOST_HANA_STRING("age")
|
|
);
|
|
|
|
constexpr auto get_name = hana::second(accessors[hana::size_c<0>]);
|
|
constexpr auto get_age = hana::second(accessors[hana::size_c<1>]);
|
|
|
|
Person john{"John", 30};
|
|
BOOST_HANA_RUNTIME_CHECK(get_name(john) == "John");
|
|
BOOST_HANA_RUNTIME_CHECK(get_age(john) == 30);
|
|
}
|