| 1 | // Copyright Louis Dionne 2013-2022 |
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| 2 | // Distributed under the Boost Software License, Version 1.0. |
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| 3 | // (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt) |
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| 4 | |
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| 5 | #include <boost/hana/accessors.hpp> |
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| 6 | #include <boost/hana/all_of.hpp> |
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| 7 | #include <boost/hana/assert.hpp> |
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| 8 | #include <boost/hana/define_struct.hpp> |
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| 9 | #include <boost/hana/equal.hpp> |
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| 10 | #include <boost/hana/find.hpp> |
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| 11 | #include <boost/hana/optional.hpp> |
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| 12 | #include <boost/hana/second.hpp> |
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| 13 | #include <boost/hana/string.hpp> |
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| 14 | |
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| 15 | #include <string> |
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| 16 | namespace hana = boost::hana; |
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| 17 | |
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| 18 | |
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| 19 | struct Person { |
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| 20 | BOOST_HANA_DEFINE_STRUCT(Person, |
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| 21 | (std::string, name), |
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| 22 | (unsigned short, age) |
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| 23 | ); |
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| 24 | }; |
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| 25 | |
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| 26 | int main() { |
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| 27 | Person john{.name: "John" , .age: 30}; |
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| 28 | |
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| 29 | BOOST_HANA_RUNTIME_CHECK( |
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| 30 | hana::find(john, BOOST_HANA_STRING("name" )) == hana::just("John" ) |
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| 31 | ); |
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| 32 | |
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| 33 | BOOST_HANA_CONSTANT_CHECK( |
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| 34 | hana::find(john, BOOST_HANA_STRING("foobar" )) == hana::nothing |
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| 35 | ); |
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| 36 | |
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| 37 | |
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| 38 | BOOST_HANA_RUNTIME_CHECK( |
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| 39 | hana::all_of(hana::accessors<Person>(), [&](auto a) { |
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| 40 | return hana::second(a)(john) == hana::second(a)(john); |
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| 41 | }) |
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| 42 | ); |
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| 43 | |
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| 44 | // the above is equivalent to: |
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| 45 | BOOST_HANA_RUNTIME_CHECK(hana::equal(john, john)); |
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| 46 | } |
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| 47 | |
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