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b32b8144 | 1 | // Copyright Louis Dionne 2013-2017 |
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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 | ||
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5 | #include <boost/hana/accessors.hpp> |
6 | #include <boost/hana/all_of.hpp> | |
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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> | |
b32b8144 | 12 | #include <boost/hana/second.hpp> |
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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 | ||
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 | ); | |
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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)); | |
7c673cae | 46 | } |