libstdc++-v3/testsuite/25_algorithms/reverse/constexpr.cc

   1 //
   2 // This file is part of the GNU ISO C++ Library.  This library is free
   3 // software; you can redistribute it and/or modify it under the
   4 // terms of the GNU General Public License as published by the
   5 // Free Software Foundation; either version 3, or (at your option)
   6 // any later version.
   7
   8 // This library is distributed in the hope that it will be useful,
   9 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 // GNU General Public License for more details.
  12
  13 // You should have received a copy of the GNU General Public License along
  14 // with this library; see the file COPYING3.  If not see
  15 // <http://www.gnu.org/licenses/>.
  16
  17 // { dg-do compile { target c++20 } }
  18
  19 #include <algorithm>
  20 #include <array>
  21
  22 constexpr bool
  23 test()
  24 {
  25   std::array<int, 12> ar0{{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11}};
  26
  27   std::reverse(ar0.begin() + 2, ar0.begin() + 9);
  28
  29   return ar0[2] == 8 && ar0[8] == 2;
  30 }
  31
  32 static_assert(test());