ceph/src/boost/libs/hana/example/duplicate.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/duplicate.hpp>
   6 #include <boost/hana/extract.hpp>
   7 #include <boost/hana/lazy.hpp>
   8 namespace hana = boost::hana;
   9
  10
  11 int main() {
  12     constexpr auto very_lazy = hana::duplicate(hana::make_lazy(3));
  13     static_assert(hana::extract(hana::extract(very_lazy)) == 3, "");
  14 }