libstdc++-v3/testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_neg.cc

   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 xfail *-*-* } }
  20 // { dg-require-debug-mode { } }
  21
  22 #include <algorithm>
  23 #include <array>
  24
  25 struct A
  26 {
  27   int _i;
  28
  29   constexpr bool
  30   operator<(const A& a) const
  31   { return _i == a._i; }
  32 };
  33
  34 constexpr bool
  35 test()
  36 {
  37   constexpr std::array<A, 12> ca0{{0, 1, 2, 3, 4, 5, 6, 5, 8, 9, 10, 11}};
  38
  39   constexpr A a6{ 6 };
  40   const auto it = std::upper_bound(ca0.begin(), ca0.end(), a6);
  41
  42   return true;
  43 }
  44
  45 static_assert(test()); // { dg-error "" }
  46
  47 // { dg-prune-output "builtin_unreachable" }
  48 // { dg-prune-output "in 'constexpr'" }