mirror of https://gitee.com/bigwinds/arangodb
19 lines
731 B
C++
19 lines
731 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/concat.hpp>
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#include <boost/hana/empty.hpp>
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#include <boost/hana/equal.hpp>
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#include <boost/hana/optional.hpp>
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namespace hana = boost::hana;
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static_assert(hana::concat(hana::nothing, hana::just('x')) == hana::just('x'), "");
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BOOST_HANA_CONSTANT_CHECK(hana::concat(hana::nothing, hana::nothing) == hana::nothing);
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static_assert(hana::concat(hana::just('x'), hana::just('y')) == hana::just('x'), "");
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BOOST_HANA_CONSTANT_CHECK(hana::empty<hana::optional_tag>() == hana::nothing);
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int main() { }
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