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1 | // Copyright Louis Dionne 2013-2016 |
2 | // Distributed under the Boost Software License, Version 1.0. | |
3 | // (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt) | |
4 | ||
5 | #include <boost/hana/assert.hpp> | |
6 | #include <boost/hana/config.hpp> | |
7 | #include <boost/hana/core/to.hpp> | |
8 | #include <boost/hana/equal.hpp> | |
9 | #include <boost/hana/find.hpp> | |
10 | #include <boost/hana/functional/id.hpp> | |
11 | #include <boost/hana/fwd/accessors.hpp> | |
12 | #include <boost/hana/integral_constant.hpp> | |
13 | #include <boost/hana/not_equal.hpp> | |
14 | #include <boost/hana/pair.hpp> | |
15 | #include <boost/hana/string.hpp> | |
16 | #include <boost/hana/tuple.hpp> | |
17 | ||
18 | #include <string> | |
19 | #include <utility> | |
20 | namespace hana = boost::hana; | |
21 | ||
22 | ||
23 | //! [main] | |
24 | struct Person { | |
25 | Person(std::string const& name, int age) : name_(name), age_(age) { } | |
26 | ||
27 | std::string const& get_name() const { return name_; } | |
28 | int get_age() const { return age_; } | |
29 | ||
30 | private: | |
31 | std::string name_; | |
32 | int age_; | |
33 | }; | |
34 | ||
35 | namespace boost { namespace hana { | |
36 | template <> | |
37 | struct accessors_impl<Person> { | |
38 | static BOOST_HANA_CONSTEXPR_LAMBDA auto apply() { | |
39 | return make_tuple( | |
40 | make_pair(BOOST_HANA_STRING("name"), [](auto&& p) -> std::string const& { | |
41 | return p.get_name(); | |
42 | }), | |
43 | make_pair(BOOST_HANA_STRING("age"), [](auto&& p) { | |
44 | return p.get_age(); | |
45 | }) | |
46 | ); | |
47 | } | |
48 | }; | |
49 | }} | |
50 | //! [main] | |
51 | ||
52 | int main() { | |
53 | auto name = BOOST_HANA_STRING("name"); | |
54 | auto age = BOOST_HANA_STRING("age"); | |
55 | ||
56 | Person john{"John", 30}, bob{"Bob", 40}; | |
57 | BOOST_HANA_RUNTIME_CHECK(hana::equal(john, john)); | |
58 | BOOST_HANA_RUNTIME_CHECK(hana::not_equal(john, bob)); | |
59 | ||
60 | BOOST_HANA_RUNTIME_CHECK(hana::find(john, name) == hana::just("John")); | |
61 | BOOST_HANA_RUNTIME_CHECK(hana::find(john, age) == hana::just(30)); | |
62 | BOOST_HANA_CONSTANT_CHECK(hana::find(john, BOOST_HANA_STRING("foo")) == hana::nothing); | |
63 | ||
64 | BOOST_HANA_RUNTIME_CHECK(hana::to_tuple(john) == hana::make_tuple( | |
65 | hana::make_pair(name, "John"), | |
66 | hana::make_pair(age, 30) | |
67 | )); | |
68 | } |