ceph/src/boost/libs/hana/example/optional/maybe.cpp

   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)
   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() { }