| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <tuple> |
| |
| // template <class... Types> class tuple; |
| |
| // template<class... TTypes, class... UTypes> |
| // auto |
| // operator<=>(const tuple<TTypes...>& t, const tuple<UTypes...>& u); |
| |
| // UNSUPPORTED: c++03, c++11, c++14, c++17 |
| |
| #include <tuple> |
| |
| template <class T, class U> |
| concept can_compare = requires(T t, U u) { t <=> u; }; |
| |
| typedef std::tuple<int> T1; |
| typedef std::tuple<int, long> T2; |
| |
| static_assert(!can_compare<T1, T2>); |
| static_assert(!can_compare<T2, T1>); |
