libstdc++-v3/testsuite/24_iterators/back_insert_iterator/pr93884.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 run { target c++2a } }
  20
  21 #include <iterator>
  22 #include <algorithm>
  23 #include <vector>
  24 #include <ranges>
  25 #include <testsuite_hooks.h>
  26
  27 namespace ranges = std::ranges;
  28 namespace views = std::views;
  29
  30 void
  31 test01()
  32 {
  33   auto v = std::vector<int>{};
  34   auto i = views::iota(0, 10);
  35   auto o = std::back_inserter(v);
  36   static_assert(std::output_iterator<decltype(o), int>);
  37   ranges::copy(i, o);
  38   VERIFY( ranges::equal(v, i) );
  39 }
  40
  41 int
  42 main()
  43 {
  44   test01();
  45 }