libstdc++-v3/testsuite/20_util/function/10.cc

   1 // { dg-do compile { target c++11 } }
   2 // { dg-require-effective-target hosted }
   3 //
   4 // Copyright (C) 2012-2024 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11 //
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16 //
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21 // 20.8.11 polymorphic function object wrapper
  22
  23 #include <functional>
  24
  25 struct X { void f() { } };
  26
  27 void (X::*p)() = &X::f;
  28 void (X::* volatile& vp)() = p;
  29
  30 typedef std::function<void(X&)> function_type;
  31
  32 void test01()
  33 {
  34   function_type f( vp );
  35   function_type f2( std::ref(vp) );
  36   function_type f3( std::cref(vp) );
  37 }