1 // Copyright (C) 2020-2021 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 <compare>
22
23 void
test01()24 test01()
25 {
26 // PR libstdc++/93479
27 int i[1];
28 int j[1];
29 std::compare_three_way{}(i, j); // { dg-error "no match" }
30 }
31
32 void
test02()33 test02()
34 {
35 struct X
36 {
37 operator const char*() const noexcept { return "!"; }
38 void operator<=>(X) const = delete;
39 void operator<=>(const void*) const = delete;
40 } x;
41 std::compare_three_way{}(x, x); // { dg-error "no match" }
42 std::compare_three_way{}(x, ""); // { dg-error "no match" }
43 std::compare_three_way{}("", x); // { dg-error "no match" }
44 }
45
46 // { dg-prune-output "in requirements with" }
47