libstdc++-v3/testsuite/24_iterators/istream_iterator/70766.cc

   1 // Copyright (C) 2016-2023 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-do compile { target c++11 } }
  19
  20 #include <iterator>
  21 #include <istream>
  22
  23 namespace adl
  24 {
  25   template<typename T>
  26     void operator&(const T&) = delete;
  27
  28   struct traits : std::char_traits<char> { };
  29
  30   struct X { void f() const { } };
  31
  32   std::basic_istream<char, adl::traits>&
  33   operator>>(std::basic_istream<char, adl::traits>& is, X&)
  34   { return is; }
  35 }
  36
  37 void
  38 test01()
  39 {
  40   std::basic_istream<char, adl::traits> is(nullptr);
  41   std::istream_iterator<adl::X, char, adl::traits> ii(is);
  42   ii->f();
  43 }