libstdc++-v3/testsuite/25_algorithms/equal/debug/constexpr_neg.cc

   1 // Copyright (C) 2020-2024 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-do compile { target c++20 } }
  19 // { dg-require-debug-mode "" }
  20
  21 #include <algorithm>
  22 #include <array>
  23
  24 constexpr bool
  25 test01()
  26 {
  27   constexpr std::array<int, 12> ca0{{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11}};
  28   constexpr std::array<int, 12> ca1{{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11}};
  29
  30   const auto outa = std::equal(ca0.end(), ca0.begin(), ca1.begin());
  31   return outa;
  32 }
  33
  34 static_assert(test01()); // { dg-error "non-constant condition" }
  35 // { dg-error "builtin_unreachable" "" { target *-*-* } 0 }
  36
  37 constexpr bool
  38 test02()
  39 {
  40   constexpr std::array<int, 12> ca0{{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11}};
  41   constexpr std::array<int, 11> ca1{{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}};
  42
  43   const auto outa = std::equal(ca0.begin(), ca0.end(), ca1.begin());
  44   return outa;
  45 }
  46
  47 static_assert(test02()); // { dg-error "non-constant condition" }
  48 // { dg-error "is outside the bounds" "" { target *-*-* } 0 }