libstdc++-v3/testsuite/24_iterators/reverse_iterator/100639.cc

   1 // Copyright (C) 2021-2023 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=c++2a" }
  19 // { dg-do compile { target c++2a } }
  20
  21 // PR libstdc++/100639
  22
  23 #include <iterator>
  24 #include <ranges>
  25
  26 void
  27 test01()
  28 {
  29   using iter = std::ranges::iterator_t<std::ranges::iota_view<long long>>;
  30   using riter = std::reverse_iterator<iter>;
  31   static_assert(std::same_as<std::iter_reference_t<iter>,
  32                              std::iter_reference_t<riter>>);
  33   static_assert(std::same_as<std::iter_value_t<iter>,
  34                              std::iter_value_t<riter>>);
  35   static_assert(std::same_as<std::iter_difference_t<iter>,
  36                              std::iter_difference_t<riter>>);
  37 }