44 lines
1.4 KiB
C++
44 lines
1.4 KiB
C++
// Copyright Louis Dionne 2013-2017
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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/experimental/view.hpp>
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#include <boost/hana/is_empty.hpp>
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#include <boost/hana/not.hpp>
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#include <support/seq.hpp>
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namespace hana = boost::hana;
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template <int> struct undefined { };
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int main() {
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auto container = ::seq;
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{
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auto storage1 = container();
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auto storage2 = container();
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auto joined = hana::experimental::joined(storage1, storage2);
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BOOST_HANA_CONSTANT_CHECK(hana::is_empty(joined));
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}
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{
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auto storage1 = container(undefined<0>{});
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auto storage2 = container();
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auto joined = hana::experimental::joined(storage1, storage2);
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BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_empty(joined)));
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}
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{
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auto storage1 = container(undefined<0>{});
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auto storage2 = container(undefined<1>{});
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auto joined = hana::experimental::joined(storage1, storage2);
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BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_empty(joined)));
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}
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{
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auto storage1 = container();
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auto storage2 = container(undefined<0>{});
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auto joined = hana::experimental::joined(storage1, storage2);
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BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_empty(joined)));
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}
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}
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