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- // Copyright Louis Dionne 2013-2017
- // Distributed under the Boost Software License, Version 1.0.
- // (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
- #include <boost/hana/accessors.hpp>
- #include <boost/hana/all_of.hpp>
- #include <boost/hana/assert.hpp>
- #include <boost/hana/define_struct.hpp>
- #include <boost/hana/equal.hpp>
- #include <boost/hana/find.hpp>
- #include <boost/hana/optional.hpp>
- #include <boost/hana/second.hpp>
- #include <boost/hana/string.hpp>
- #include <string>
- namespace hana = boost::hana;
- struct Person {
- BOOST_HANA_DEFINE_STRUCT(Person,
- (std::string, name),
- (unsigned short, age)
- );
- };
- int main() {
- Person john{"John", 30};
- BOOST_HANA_RUNTIME_CHECK(
- hana::find(john, BOOST_HANA_STRING("name")) == hana::just("John")
- );
- BOOST_HANA_CONSTANT_CHECK(
- hana::find(john, BOOST_HANA_STRING("foobar")) == hana::nothing
- );
- BOOST_HANA_RUNTIME_CHECK(
- hana::all_of(hana::accessors<Person>(), [&](auto a) {
- return hana::second(a)(john) == hana::second(a)(john);
- })
- );
- // the above is equivalent to:
- BOOST_HANA_RUNTIME_CHECK(hana::equal(john, john));
- }
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