libstdc++-v3/testsuite/20_util/reference_wrapper/80504.cc

   1 // Copyright (C) 2017-2021 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-do compile { target c++11 } }
  19
  20 #include <functional>
  21
  22 namespace X {
  23   struct Y { };
  24   template<typename T> void ref(T) { }
  25   template<typename T> void cref(T) { }
  26 }
  27
  28 int main()
  29 {
  30   X::Y i;
  31   std::reference_wrapper<X::Y> r(i);
  32   ref(r);
  33   cref(r);
  34 }