50 lines
1.7 KiB
C++
50 lines
1.7 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 <boost/hana/tuple.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 storage = container();
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auto sliced = hana::experimental::sliced(storage, hana::tuple_c<int>);
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BOOST_HANA_CONSTANT_CHECK(hana::is_empty(sliced));
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}{
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auto storage = container(undefined<0>{});
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auto sliced = hana::experimental::sliced(storage, hana::tuple_c<int>);
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BOOST_HANA_CONSTANT_CHECK(hana::is_empty(sliced));
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}{
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auto storage = container(undefined<0>{}, undefined<1>{});
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auto sliced = hana::experimental::sliced(storage, hana::tuple_c<int>);
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BOOST_HANA_CONSTANT_CHECK(hana::is_empty(sliced));
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}
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{
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auto storage = container(undefined<0>{});
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auto sliced = hana::experimental::sliced(storage, hana::tuple_c<int, 0>);
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BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_empty(sliced)));
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}{
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auto storage = container(undefined<0>{});
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auto sliced = hana::experimental::sliced(storage, hana::tuple_c<int, 0, 0>);
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BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_empty(sliced)));
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}
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{
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auto storage = container(undefined<0>{}, undefined<1>{});
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auto sliced = hana::experimental::sliced(storage, hana::tuple_c<int, 0, 1>);
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BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_empty(sliced)));
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}
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}
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