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Diffstat (limited to 'src/boost/libs/hana/example/struct.mcd.nested.cpp')
-rw-r--r-- | src/boost/libs/hana/example/struct.mcd.nested.cpp | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/src/boost/libs/hana/example/struct.mcd.nested.cpp b/src/boost/libs/hana/example/struct.mcd.nested.cpp new file mode 100644 index 00000000..3ba10a37 --- /dev/null +++ b/src/boost/libs/hana/example/struct.mcd.nested.cpp @@ -0,0 +1,57 @@ +// 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/assert.hpp> +#include <boost/hana/concept/struct.hpp> +#include <boost/hana/config.hpp> +#include <boost/hana/equal.hpp> +#include <boost/hana/find.hpp> +#include <boost/hana/functional/id.hpp> +#include <boost/hana/integral_constant.hpp> +#include <boost/hana/not_equal.hpp> +#include <boost/hana/pair.hpp> +#include <boost/hana/string.hpp> +#include <boost/hana/tuple.hpp> + +#include <string> +#include <utility> +namespace hana = boost::hana; + + +//! [main] +struct Person { + std::string name; + int age; + + struct hana_accessors_impl { + static BOOST_HANA_CONSTEXPR_LAMBDA auto apply() { + return boost::hana::make_tuple( + boost::hana::make_pair(BOOST_HANA_STRING("name"), + [](auto&& p) -> decltype(auto) { + return boost::hana::id(std::forward<decltype(p)>(p).name); + }), + boost::hana::make_pair(BOOST_HANA_STRING("age"), + [](auto&& p) -> decltype(auto) { + return boost::hana::id(std::forward<decltype(p)>(p).age); + }) + ); + } + }; +}; +//! [main] + +int main() { + Person john{"John", 30}, bob{"Bob", 40}; + BOOST_HANA_RUNTIME_CHECK(hana::equal(john, john)); + BOOST_HANA_RUNTIME_CHECK(hana::not_equal(john, bob)); + + BOOST_HANA_RUNTIME_CHECK(hana::find(john, BOOST_HANA_STRING("name")) == hana::just("John")); + BOOST_HANA_RUNTIME_CHECK(hana::find(john, BOOST_HANA_STRING("age")) == hana::just(30)); + BOOST_HANA_CONSTANT_CHECK(hana::find(john, BOOST_HANA_STRING("foo")) == hana::nothing); + + BOOST_HANA_RUNTIME_CHECK(hana::to_tuple(john) == hana::make_tuple( + hana::make_pair(BOOST_HANA_STRING("name"), "John"), + hana::make_pair(BOOST_HANA_STRING("age"), 30) + )); +} |