| 1 | // Copyright Louis Dionne 2013-2022 |
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| 2 | // Distributed under the Boost Software License, Version 1.0. |
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| 3 | // (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt) |
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| 4 | |
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| 5 | #include <boost/hana/assert.hpp> |
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| 6 | #include <boost/hana/drop_front_exactly.hpp> |
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| 7 | #include <boost/hana/equal.hpp> |
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| 8 | #include <boost/hana/integral_constant.hpp> |
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| 9 | #include <boost/hana/tuple.hpp> |
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| 10 | namespace hana = boost::hana; |
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| 11 | |
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| 12 | |
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| 13 | constexpr auto xs = hana::make_tuple(0, '1', 2.0); |
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| 14 | |
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| 15 | static_assert(hana::drop_front_exactly(xs, hana::size_c<1>) == hana::make_tuple('1', 2.0), "" ); |
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| 16 | static_assert(hana::drop_front_exactly(xs, hana::size_c<2>) == hana::make_tuple(2.0), "" ); |
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| 17 | BOOST_HANA_CONSTANT_CHECK(hana::drop_front_exactly(xs, hana::size_c<3>) == hana::make_tuple()); |
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| 18 | |
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| 19 | // drop_front_exactly(xs) is equivalent to drop_front_exactly(xs, size_t<1>) |
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| 20 | static_assert(hana::drop_front_exactly(xs) == hana::make_tuple('1', 2.0), "" ); |
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| 21 | |
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| 22 | int main() { } |
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| 23 | |
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