1 // Copyright (C) 2019-2021 Free Software Foundation, Inc.
2 //
3 // This file is part of the GNU ISO C++ Library.  This library is free
4 // software; you can redistribute it and/or modify it under the
5 // terms of the GNU General Public License as published by the
6 // Free Software Foundation; either version 3, or (at your option)
7 // any later version.
8 
9 // This library is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12 // GNU General Public License for more details.
13 
14 // You should have received a copy of the GNU General Public License along
15 // with this library; see the file COPYING3.  If not see
16 // <http://www.gnu.org/licenses/>.
17 
18 // { dg-options "-std=gnu++2a" }
19 // { dg-do compile { target c++2a } }
20 
21 #include <concepts>
22 
23 static_assert( ! std::strict_weak_order<bool, void, void> );
24 static_assert( ! std::strict_weak_order<bool(), void, void> );
25 static_assert( ! std::strict_weak_order<bool(*)(), void, void> );
26 static_assert( ! std::strict_weak_order<bool(&)(int, int), void, void> );
27 static_assert( ! std::strict_weak_order<bool(), int, int> );
28 static_assert( ! std::strict_weak_order<bool() const, int, int> );
29 
30 static_assert( std::strict_weak_order<bool(*)(int, int), short, long> );
31 static_assert( std::strict_weak_order<bool(&)(const void*, const void*), char[2], int*> );
32 
33 static_assert( ! std::strict_weak_order<bool& (const long*, short), long*, char> );
34 
35 struct A;
36 static_assert( ! std::strict_weak_order<int A::*, const A&, const A&> );
37 static_assert( ! std::strict_weak_order<void (A::*)(long&), const A*, long&> );
38 static_assert( ! std::strict_weak_order<void (A::*)(long&) const, A*, long&> );
39 static_assert( std::strict_weak_order<long (A::*)(A*) const, A*, A*> );
40 
41 struct F
42 {
43   void operator()(long, long) const;
44   bool& operator()(int, const int&) const;
45 };
46 static_assert( ! std::strict_weak_order<F, long, long> );
47 static_assert( std::strict_weak_order<F&, int, int> );
48 static_assert( std::strict_weak_order<const F&, const int, const int> );
49