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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/accessors.hpp>
#include <boost/hana/adapt_adt.hpp>
#include <boost/hana/assert.hpp>
#include <boost/hana/core/to.hpp>
#include <boost/hana/equal.hpp>
#include <boost/hana/find.hpp>
#include <boost/hana/first.hpp>
#include <boost/hana/map.hpp>
#include <boost/hana/not_equal.hpp>
#include <boost/hana/optional.hpp>
#include <boost/hana/pair.hpp>
#include <boost/hana/string.hpp>
#include <boost/hana/transform.hpp>
#include <boost/hana/tuple.hpp>
#include <string>
namespace hana = boost::hana;
namespace ns {
struct Person {
explicit Person(std::string const& name, int age)
: name_(name), age_(age)
{ }
std::string const& get_name() const { return name_; }
int get_age() const { return age_; }
private:
std::string name_;
int age_;
};
}
BOOST_HANA_ADAPT_ADT(ns::Person,
(name, [](ns::Person const& p) { return p.get_name(); }),
(age, [](ns::Person const& p) { return p.get_age(); })
);
// The member names are hana::strings:
auto names = hana::transform(hana::accessors<ns::Person>(), hana::first);
BOOST_HANA_CONSTANT_CHECK(
names == hana::make_tuple(BOOST_HANA_STRING("name"), BOOST_HANA_STRING("age"))
);
int main() {
ns::Person john{"John", 30}, bob{"Bob", 40};
BOOST_HANA_RUNTIME_CHECK(hana::equal(john, john));
BOOST_HANA_RUNTIME_CHECK(hana::not_equal(john, bob));
BOOST_HANA_RUNTIME_CHECK(hana::find(john, BOOST_HANA_STRING("name")) == hana::just("John"));
BOOST_HANA_RUNTIME_CHECK(hana::find(john, BOOST_HANA_STRING("age")) == hana::just(30));
BOOST_HANA_CONSTANT_CHECK(hana::find(john, BOOST_HANA_STRING("foo")) == hana::nothing);
BOOST_HANA_RUNTIME_CHECK(hana::to_tuple(john) == hana::make_tuple(
hana::make_pair(BOOST_HANA_STRING("name"), "John"),
hana::make_pair(BOOST_HANA_STRING("age"), 30)
));
BOOST_HANA_RUNTIME_CHECK(hana::to_map(john) == hana::make_map(
hana::make_pair(BOOST_HANA_STRING("name"), "John"),
hana::make_pair(BOOST_HANA_STRING("age"), 30)
));
}
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