25 lines
1003 B
C++
25 lines
1003 B
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/drop_front.hpp>
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#include <boost/hana/equal.hpp>
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#include <boost/hana/integral_constant.hpp>
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#include <boost/hana/tuple.hpp>
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namespace hana = boost::hana;
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constexpr auto xs = hana::make_tuple(0, '1', 2.0);
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static_assert(hana::drop_front(xs, hana::size_c<0>) == xs, "");
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static_assert(hana::drop_front(xs, hana::size_c<1>) == hana::make_tuple('1', 2.0), "");
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static_assert(hana::drop_front(xs, hana::size_c<2>) == hana::make_tuple(2.0), "");
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BOOST_HANA_CONSTANT_CHECK(hana::drop_front(xs, hana::size_c<3>) == hana::make_tuple());
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BOOST_HANA_CONSTANT_CHECK(hana::drop_front(xs, hana::size_c<4>) == hana::make_tuple());
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// drop_front(xs) is equivalent to drop_front(xs, size_t<1>)
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static_assert(hana::drop_front(xs) == hana::make_tuple('1', 2.0), "");
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int main() { }
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