libstdc++-v3/testsuite/25_algorithms/move_backward/95578.cc

   1 // Copyright (C) 2020-2025 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 run { target c++20 } }
  19
  20 #include <algorithm>
  21 #include <vector>
  22 #include <testsuite_hooks.h>
  23
  24 namespace ranges = std::ranges;
  25
  26 template<typename It>
  27 struct sentinel
  28 {
  29   It it;
  30
  31   friend bool
  32   operator==(It x, sentinel y)
  33   { return x == y.it; }
  34 };
  35
  36 void
  37 test01()
  38 {
  39   std::vector<int> v = {1,2,3,4,5}, w = {0,0,0,0,0};
  40   ranges::subrange sr = {v.begin(), sentinel{v.end()}};
  41   ranges::move_backward(sr, w.end());
  42   VERIFY( ranges::equal(w, (int[]){1,2,3,4,5}) );
  43 }
  44
  45 void
  46 test02()
  47 {
  48   using std::reverse_iterator;
  49   std::vector<int> v = {1,2,3,4,5}, w = {0,0,0,0,0};
  50   ranges::subrange sr
  51     = {reverse_iterator{v.end()}, sentinel{reverse_iterator{v.begin()}}};
  52   ranges::move_backward(sr, reverse_iterator{w.begin()});
  53   VERIFY( ranges::equal(w, (int[]){1,2,3,4,5}) );
  54 }
  55
  56 int
  57 main()
  58 {
  59   test01();
  60   test02();
  61 }