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git.proxmox.com Git - ceph.git/blob - ceph/src/boost/libs/hana/example/optional/functor.cpp
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1 // Copyright Louis Dionne 2013-2017
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)
5 #include <boost/hana/assert.hpp>
6 #include <boost/hana/equal.hpp>
7 #include <boost/hana/functional/placeholder.hpp>
8 #include <boost/hana/optional.hpp>
9 #include <boost/hana/transform.hpp>
10 namespace hana
= boost::hana
;
13 BOOST_HANA_CONSTANT_CHECK(hana::transform(hana::nothing
, hana::_
+ 1) == hana::nothing
);
14 static_assert(hana::transform(hana::just(1), hana::_
+ 1) == hana::just(2), "");