mirror of https://gitee.com/bigwinds/arangodb
18 lines
587 B
C++
18 lines
587 B
C++
// Copyright Louis Dionne 2013-2016
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
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#include <boost/hana/assert.hpp>
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#include <boost/hana/not.hpp>
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#include <boost/hana/optional.hpp>
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namespace hana = boost::hana;
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struct undefined { };
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int main() {
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BOOST_HANA_CONSTANT_CHECK(hana::is_nothing(hana::nothing));
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BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_nothing(hana::just(undefined{}))));
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BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_nothing(hana::just(hana::nothing))));
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}
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