| 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/is_empty.hpp> |
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| 7 | #include <boost/hana/not.hpp> |
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| 8 | #include <boost/hana/tuple.hpp> |
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| 9 | namespace hana = boost::hana; |
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| 10 | |
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| 11 | |
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| 12 | struct x0; |
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| 13 | struct x1; |
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| 14 | struct x2; |
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| 15 | |
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| 16 | int main() { |
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| 17 | // tuple_t |
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| 18 | BOOST_HANA_CONSTANT_CHECK(hana::is_empty(hana::tuple_t<>)); |
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| 19 | BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_empty(hana::tuple_t<x0>))); |
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| 20 | BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_empty(hana::tuple_t<x0, x1>))); |
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| 21 | BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_empty(hana::tuple_t<x0, x1, x2>))); |
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| 22 | |
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| 23 | // tuple_c |
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| 24 | BOOST_HANA_CONSTANT_CHECK(hana::is_empty(hana::tuple_c<int>)); |
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| 25 | BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_empty(hana::tuple_c<int, 0>))); |
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| 26 | BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_empty(hana::tuple_c<int, 0, 1>))); |
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| 27 | BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_empty(hana::tuple_c<int, 0, 1, 2>))); |
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| 28 | } |
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| 29 | |
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