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

   1 // { dg-do compile { target c++11 } }
   2 //
   3 // Copyright (C) 2012-2018 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10 //
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15 //
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 // 20.8.11 polymorphic function object wrapper
  21
  22 #include <functional>
  23
  24 struct X { void f() { } };
  25
  26 void (X::*p)() = &X::f;
  27 void (X::* volatile& vp)() = p;
  28
  29 typedef std::function<void(X&)> function_type;
  30
  31 void test01()
  32 {
  33   function_type f( vp );
  34   function_type f2( std::ref(vp) );
  35   function_type f3( std::cref(vp) );
  36 }