[ceph.git] / ceph / src / boost / libs / hana / example / optional / maybe.cpp

// 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/functional/placeholder.hpp>
#include <boost/hana/optional.hpp>
namespace hana = boost::hana;


static_assert(hana::maybe('x', hana::_ + 1, hana::just(1)) == 2, "");
static_assert(hana::maybe('x', hana::_ + 1, hana::nothing) == 'x', "");

int main() { }
Commit	Line	Data
b32b8144	1	// Copyright Louis Dionne 2013-2017
7c673cae FG	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)
	4
	5	#include <boost/hana/functional/placeholder.hpp>
	6	#include <boost/hana/optional.hpp>
	7	namespace hana = boost::hana;
	8
	9
	10	static_assert(hana::maybe('x', hana::_ + 1, hana::just(1)) == 2, "");
	11	static_assert(hana::maybe('x', hana::_ + 1, hana::nothing) == 'x', "");
	12
	13	int main() { }