| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // UNSUPPORTED: c++03, c++11, c++14, c++17 |
| |
| // template<class F, class... Args> |
| // concept strict_weak_order; |
| |
| #include <concepts> |
| |
| static_assert(std::strict_weak_order<bool(int, int), int, int>); |
| static_assert(std::strict_weak_order<bool(int, int), double, double>); |
| static_assert(std::strict_weak_order<bool(int, double), double, double>); |
| |
| static_assert(!std::strict_weak_order<bool (*)(), int, double>); |
| static_assert(!std::strict_weak_order<bool (*)(int), int, double>); |
| static_assert(!std::strict_weak_order<bool (*)(double), int, double>); |
| |
| static_assert(!std::strict_weak_order<bool(double, double*), double, double*>); |
| static_assert(!std::strict_weak_order<bool(int&, int&), double&, double&>); |
| |
| struct S1 {}; |
| static_assert(std::strict_weak_order<bool (S1::*)(S1*), S1*, S1*>); |
| static_assert(std::strict_weak_order<bool (S1::*)(S1&), S1&, S1&>); |
| |
| struct S2 {}; |
| |
| struct P1 { |
| bool operator()(S1, S1) const; |
| }; |
| static_assert(std::strict_weak_order<P1, S1, S1>); |
| |
| struct P2 { |
| bool operator()(S1, S1) const; |
| bool operator()(S1, S2) const; |
| }; |
| static_assert(!std::strict_weak_order<P2, S1, S2>); |
| |
| struct P3 { |
| bool operator()(S1, S1) const; |
| bool operator()(S1, S2) const; |
| bool operator()(S2, S1) const; |
| }; |
| static_assert(!std::strict_weak_order<P3, S1, S2>); |
| |
| struct P4 { |
| bool operator()(S1, S1) const; |
| bool operator()(S1, S2) const; |
| bool operator()(S2, S1) const; |
| bool operator()(S2, S2) const; |
| }; |
| static_assert(std::strict_weak_order<P4, S1, S2>); |