| 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_while.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/less.hpp> |
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| 10 | #include <boost/hana/negate.hpp> |
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| 11 | #include <boost/hana/range.hpp> |
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| 12 | #include <boost/hana/tuple.hpp> |
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| 13 | namespace hana = boost::hana; |
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| 14 | using namespace hana::literals; |
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| 15 | |
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| 16 | |
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| 17 | auto negative = [](auto x) { |
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| 18 | return x < hana::int_c<0>; |
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| 19 | }; |
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| 20 | |
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| 21 | BOOST_HANA_CONSTANT_CHECK( |
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| 22 | hana::drop_while(hana::make_range(hana::int_c<-3>, hana::int_c<6>), negative) |
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| 23 | == |
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| 24 | hana::make_range(hana::int_c<0>, hana::int_c<6>) |
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| 25 | ); |
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| 26 | |
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| 27 | BOOST_HANA_CONSTANT_CHECK( |
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| 28 | hana::drop_while(hana::make_tuple(1_c, -2_c, 4_c, 5_c), negative) |
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| 29 | == |
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| 30 | hana::make_tuple(1_c, -2_c, 4_c, 5_c) |
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| 31 | ); |
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| 32 | |
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| 33 | int main() { } |
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| 34 | |
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