58 lines
1.9 KiB
C++
58 lines
1.9 KiB
C++
// Copyright Louis Dionne 2013-2017
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
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#include <boost/hana/assert.hpp>
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#include <boost/hana/concept/struct.hpp>
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#include <boost/hana/config.hpp>
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#include <boost/hana/equal.hpp>
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#include <boost/hana/find.hpp>
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#include <boost/hana/functional/id.hpp>
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#include <boost/hana/integral_constant.hpp>
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#include <boost/hana/not_equal.hpp>
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#include <boost/hana/pair.hpp>
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#include <boost/hana/string.hpp>
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#include <boost/hana/tuple.hpp>
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#include <string>
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#include <utility>
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namespace hana = boost::hana;
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//! [main]
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struct Person {
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std::string name;
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int age;
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struct hana_accessors_impl {
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static BOOST_HANA_CONSTEXPR_LAMBDA auto apply() {
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return boost::hana::make_tuple(
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boost::hana::make_pair(BOOST_HANA_STRING("name"),
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[](auto&& p) -> decltype(auto) {
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return boost::hana::id(std::forward<decltype(p)>(p).name);
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}),
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boost::hana::make_pair(BOOST_HANA_STRING("age"),
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[](auto&& p) -> decltype(auto) {
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return boost::hana::id(std::forward<decltype(p)>(p).age);
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})
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);
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}
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};
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};
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//! [main]
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int main() {
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Person john{"John", 30}, bob{"Bob", 40};
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BOOST_HANA_RUNTIME_CHECK(hana::equal(john, john));
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BOOST_HANA_RUNTIME_CHECK(hana::not_equal(john, bob));
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BOOST_HANA_RUNTIME_CHECK(hana::find(john, BOOST_HANA_STRING("name")) == hana::just("John"));
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BOOST_HANA_RUNTIME_CHECK(hana::find(john, BOOST_HANA_STRING("age")) == hana::just(30));
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BOOST_HANA_CONSTANT_CHECK(hana::find(john, BOOST_HANA_STRING("foo")) == hana::nothing);
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BOOST_HANA_RUNTIME_CHECK(hana::to_tuple(john) == hana::make_tuple(
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hana::make_pair(BOOST_HANA_STRING("name"), "John"),
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hana::make_pair(BOOST_HANA_STRING("age"), 30)
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));
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}
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