| 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.hpp> |
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| 6 | |
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| 7 | #include <iostream> |
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| 8 | #include <string> |
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| 9 | namespace hana = boost::hana; |
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| 10 | using namespace hana::literals; |
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| 11 | using namespace std::literals; |
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| 12 | |
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| 13 | |
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| 14 | //! [BOOST_HANA_DEFINE_STRUCT] |
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| 15 | struct Person { |
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| 16 | BOOST_HANA_DEFINE_STRUCT(Person, |
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| 17 | (std::string, name), |
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| 18 | (int, age) |
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| 19 | ); |
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| 20 | }; |
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| 21 | //! [BOOST_HANA_DEFINE_STRUCT] |
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| 22 | |
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| 23 | int main() { |
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| 24 | |
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| 25 | //! [for_each] |
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| 26 | Person john{.name: "John" , .age: 30}; |
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| 27 | |
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| 28 | hana::for_each(john, [](auto pair) { |
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| 29 | std::cout << hana::to<char const*>(hana::first(pair)) << ": " |
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| 30 | << hana::second(pair) << std::endl; |
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| 31 | }); |
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| 32 | |
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| 33 | // name: John |
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| 34 | // age: 30 |
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| 35 | //! [for_each] |
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| 36 | |
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| 37 | //! [for_each.fuse] |
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| 38 | hana::for_each(john, hana::fuse([](auto name, auto member) { |
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| 39 | std::cout << hana::to<char const*>(name) << ": " << member << std::endl; |
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| 40 | })); |
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| 41 | //! [for_each.fuse] |
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| 42 | |
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| 43 | #ifdef BOOST_HANA_CONFIG_ENABLE_STRING_UDL |
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| 44 | |
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| 45 | { |
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| 46 | |
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| 47 | //! [at_key] |
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| 48 | std::string name = hana::at_key(john, "name"_s ); |
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| 49 | BOOST_HANA_RUNTIME_CHECK(name == "John" ); |
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| 50 | |
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| 51 | int age = hana::at_key(john, "age"_s ); |
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| 52 | BOOST_HANA_RUNTIME_CHECK(age == 30); |
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| 53 | //! [at_key] |
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| 54 | |
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| 55 | }{ |
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| 56 | |
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| 57 | //! [to<map_tag>] |
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| 58 | auto map = hana::insert(hana::to<hana::map_tag>(john), hana::make_pair("last name"_s , "Doe"s )); |
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| 59 | |
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| 60 | std::string name = map["name"_s ]; |
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| 61 | BOOST_HANA_RUNTIME_CHECK(name == "John" ); |
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| 62 | |
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| 63 | std::string last_name = map["last name"_s ]; |
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| 64 | BOOST_HANA_RUNTIME_CHECK(last_name == "Doe" ); |
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| 65 | |
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| 66 | int age = map["age"_s ]; |
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| 67 | BOOST_HANA_RUNTIME_CHECK(age == 30); |
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| 68 | //! [to<map_tag>] |
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| 69 | |
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| 70 | } |
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| 71 | |
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| 72 | #endif |
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| 73 | |
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| 74 | } |
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| 75 | |
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| 76 | //! [BOOST_HANA_ADAPT_STRUCT] |
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| 77 | namespace not_my_namespace { |
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| 78 | struct Person { |
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| 79 | std::string name; |
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| 80 | int age; |
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| 81 | }; |
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| 82 | } |
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| 83 | |
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| 84 | BOOST_HANA_ADAPT_STRUCT(not_my_namespace::Person, name, age); |
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| 85 | //! [BOOST_HANA_ADAPT_STRUCT] |
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| 86 | |
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| 87 | |
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| 88 | //! [BOOST_HANA_ADAPT_ADT] |
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| 89 | namespace also_not_my_namespace { |
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| 90 | struct Person { |
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| 91 | std::string get_name(); |
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| 92 | int get_age(); |
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| 93 | }; |
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| 94 | } |
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| 95 | |
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| 96 | BOOST_HANA_ADAPT_ADT(also_not_my_namespace::Person, |
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| 97 | (name, [](auto const& p) { return p.get_name(); }), |
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| 98 | (age, [](auto const& p) { return p.get_age(); }) |
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| 99 | ); |
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| 100 | //! [BOOST_HANA_ADAPT_ADT] |
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| 101 | |
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