68 lines
2.2 KiB
C++
68 lines
2.2 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/accessors.hpp>
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#include <boost/hana/adapt_adt.hpp>
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#include <boost/hana/assert.hpp>
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#include <boost/hana/core/to.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/first.hpp>
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#include <boost/hana/map.hpp>
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#include <boost/hana/not_equal.hpp>
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#include <boost/hana/optional.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/transform.hpp>
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#include <boost/hana/tuple.hpp>
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#include <string>
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namespace hana = boost::hana;
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namespace ns {
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struct Person {
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explicit Person(std::string const& name, int age)
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: name_(name), age_(age)
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{ }
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std::string const& get_name() const { return name_; }
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int get_age() const { return age_; }
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private:
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std::string name_;
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int age_;
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};
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}
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BOOST_HANA_ADAPT_ADT(ns::Person,
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(name, [](ns::Person const& p) { return p.get_name(); }),
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(age, [](ns::Person const& p) { return p.get_age(); })
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);
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// The member names are hana::strings:
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auto names = hana::transform(hana::accessors<ns::Person>(), hana::first);
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BOOST_HANA_CONSTANT_CHECK(
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names == hana::make_tuple(BOOST_HANA_STRING("name"), BOOST_HANA_STRING("age"))
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);
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int main() {
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ns::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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BOOST_HANA_RUNTIME_CHECK(hana::to_map(john) == hana::make_map(
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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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