1 // Copyright Louis Dionne 2013-2017
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/accessors.hpp>
6 #include <boost/hana/all_of.hpp>
7 #include <boost/hana/assert.hpp>
8 #include <boost/hana/define_struct.hpp>
9 #include <boost/hana/equal.hpp>
10 #include <boost/hana/find.hpp>
11 #include <boost/hana/optional.hpp>
12 #include <boost/hana/second.hpp>
13 #include <boost/hana/string.hpp>
14
15 #include <string>
16 namespace hana = boost::hana;
17
18
19 struct Person {
20 BOOST_HANA_DEFINE_STRUCT(Person,
21 (std::string, name),
22 (unsigned short, age)
23 );
24 };
25
main()26 int main() {
27 Person john{"John", 30};
28
29 BOOST_HANA_RUNTIME_CHECK(
30 hana::find(john, BOOST_HANA_STRING("name")) == hana::just("John")
31 );
32
33 BOOST_HANA_CONSTANT_CHECK(
34 hana::find(john, BOOST_HANA_STRING("foobar")) == hana::nothing
35 );
36
37
38 BOOST_HANA_RUNTIME_CHECK(
39 hana::all_of(hana::accessors<Person>(), [&](auto a) {
40 return hana::second(a)(john) == hana::second(a)(john);
41 })
42 );
43
44 // the above is equivalent to:
45 BOOST_HANA_RUNTIME_CHECK(hana::equal(john, john));
46 }
47