1 // Copyright (C) 2019-2020 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::regular<int> );
24 static_assert( std::regular<int*> );
25 static_assert( ! std::regular<int&> );
26 static_assert( ! std::regular<void> );
27 static_assert( ! std::regular<void()> );
28 static_assert( ! std::regular<void() noexcept> );
29 static_assert( ! std::regular<void() const> );
30 
31 struct Trivial { };
32 static_assert( ! std::regular<Trivial> );
33 
34 struct NotTrivial
35 {
NotTrivialNotTrivial36   NotTrivial() { }
~NotTrivialNotTrivial37   ~NotTrivial() { }
38 };
39 static_assert( ! std::regular<NotTrivial> );
40 
41 struct NotDefaultConstructible
42 {
NotDefaultConstructibleNotDefaultConstructible43   NotDefaultConstructible(int) { }
44 };
45 static_assert( ! std::regular<NotDefaultConstructible> );
46 
47 struct HasReference
48 {
49   int& ref;
50 };
51 static_assert( ! std::regular<HasReference> );
52 
53 struct HasEq { };
operator ==(HasEq,HasEq)54 bool operator==(HasEq, HasEq) { return true; }
55 #ifdef __cpp_impl_three_way_comparison
56 static_assert( std::regular<HasEq> );
57 #else
58 static_assert( ! std::regular<HasEq> );
59 #endif
60 
61 struct HasEqNeq { };
operator ==(HasEqNeq,HasEqNeq)62 bool operator==(HasEqNeq, HasEqNeq) { return true; }
operator !=(HasEqNeq,HasEqNeq)63 bool operator!=(HasEqNeq, HasEqNeq) { return false; }
64 static_assert( std::regular<HasEqNeq> );
65