| 1 | //===----------------------------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | // <tuple> |
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| 10 | |
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| 11 | // template <class... Types> class tuple; |
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| 12 | |
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| 13 | // template<class... TTypes, class... UTypes> |
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| 14 | // auto |
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| 15 | // operator<=>(const tuple<TTypes...>& t, const tuple<UTypes...>& u); |
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| 16 | |
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| 17 | // UNSUPPORTED: c++03, c++11, c++14, c++17 |
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| 18 | |
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| 19 | #include <tuple> |
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| 20 | |
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| 21 | template <class T, class U> |
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| 22 | concept can_compare = requires(T t, U u) { t <=> u; }; |
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| 23 | |
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| 24 | typedef std::tuple<int> T1; |
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| 25 | typedef std::tuple<int, long> T2; |
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| 26 | |
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| 27 | static_assert(!can_compare<T1, T2>); |
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| 28 | static_assert(!can_compare<T2, T1>); |
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| 29 | |
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