libstdc++-v3/testsuite/25_algorithms/unique_copy/26133.cc

   1 // Copyright (C) 2006-2025 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 #include <algorithm>
  19 #include <iterator>
  20 #include <sstream>
  21 #include <testsuite_hooks.h>
  22
  23 struct no_assign
  24 {
  25   int const x;
  26   no_assign() : x(23) { }
  27   operator int() const { return x; }
  28 };
  29
  30 // libstdc++/26133
  31 void test01()
  32 {
  33   std::ostringstream oss1, oss2;
  34
  35   no_assign in[4];
  36
  37   std::unique_copy(in, in + 4, std::ostream_iterator<int>(oss1, "\n"));
  38   VERIFY( oss1.str() == "23\n" );
  39
  40   std::unique_copy(in, in + 4, std::ostream_iterator<int>(oss2, "\n"),
  41                    std::equal_to<int>());
  42   VERIFY( oss2.str() == "23\n" );
  43 }
  44
  45 int main()
  46 {
  47   test01();
  48   return 0;
  49 }