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33 lines
1.2 KiB
C++
33 lines
1.2 KiB
C++
/*
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@copyright Louis Dionne 2014
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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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*/
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#include <boost/hana/list.hpp>
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#include <boost/hana/detail/constexpr.hpp>
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#include <boost/hana/detail/static_assert.hpp>
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#include <boost/hana/integral.hpp>
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using namespace boost::hana;
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template <int ...i>
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BOOST_HANA_CONSTEXPR_LAMBDA auto ilist = list_c<int, i...>;
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int main() {
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BOOST_HANA_STATIC_ASSERT(take(int_<0>, list()) == list());
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BOOST_HANA_STATIC_ASSERT(take(int_<1>, list()) == list());
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BOOST_HANA_STATIC_ASSERT(take(int_<2>, list()) == list());
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BOOST_HANA_STATIC_ASSERT(take(int_<0>, ilist<0>) == list());
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BOOST_HANA_STATIC_ASSERT(take(int_<1>, ilist<0>) == ilist<0>);
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BOOST_HANA_STATIC_ASSERT(take(int_<2>, ilist<0>) == ilist<0>);
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BOOST_HANA_STATIC_ASSERT(take(int_<3>, ilist<0>) == ilist<0>);
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BOOST_HANA_STATIC_ASSERT(take(int_<0>, ilist<0, 1>) == list());
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BOOST_HANA_STATIC_ASSERT(take(int_<1>, ilist<0, 1>) == ilist<0>);
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BOOST_HANA_STATIC_ASSERT(take(int_<2>, ilist<0, 1>) == ilist<0, 1>);
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BOOST_HANA_STATIC_ASSERT(take(int_<3>, ilist<0, 1>) == ilist<0, 1>);
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}
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