| 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/equal.hpp> |
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| 7 | #include <boost/hana/flatten.hpp> |
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| 8 | #include <boost/hana/optional.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 | static_assert( |
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| 14 | hana::flatten(hana::make_tuple(hana::make_tuple(1, 2, 3), |
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| 15 | hana::make_tuple(4, 5), |
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| 16 | hana::make_tuple(6, 7, 8, 9))) |
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| 17 | == |
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| 18 | hana::make_tuple(1, 2, 3, 4, 5, 6, 7, 8, 9) |
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| 19 | , "" ); |
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| 20 | |
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| 21 | BOOST_HANA_CONSTANT_CHECK(hana::flatten(hana::nothing) == hana::nothing); |
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| 22 | static_assert(hana::flatten(hana::just(hana::just(1))) == hana::just(1), "" ); |
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| 23 | BOOST_HANA_CONSTANT_CHECK(hana::flatten(hana::just(hana::nothing)) == hana::nothing); |
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| 24 | |
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| 25 | int main() { } |
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| 26 | |
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