libstdc++-v3/testsuite/18_support/comparisons/object/93479.cc

   1 // Copyright (C) 2020-2022 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
  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
  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" }