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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/duplicate.hpp>
6 #include <boost/hana/extract.hpp>
7 #include <boost/hana/lazy.hpp>
8 namespace hana
= boost::hana
;
12 constexpr auto very_lazy
= hana::duplicate(hana::make_lazy(3));
13 static_assert(hana::extract(hana::extract(very_lazy
)) == 3, "");