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// { dg-options "-std=gnu++0x" }

// 2005-01-15 Douglas Gregor <dgregor@cs.indiana.edu>

//

// Copyright (C) 2005, 2009 Free Software Foundation, Inc.

//

// This file is part of the GNU ISO C++ Library.  This library is free

// software; you can redistribute it and/or modify it under the

// terms of the GNU General Public License as published by the

// Free Software Foundation; either version 3, or (at your option)

// any later version.

//

// This library is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

// GNU General Public License for more details.

//

// You should have received a copy of the GNU General Public License along

// with this library; see the file COPYING3.  If not see

// <http://www.gnu.org/licenses/>.

// 20.7.15 polymorphic function object wrapper

#include <functional>

#include <testsuite_hooks.h>

using namespace __gnu_test;

bool test __attribute__((unused)) = true;

struct secret {};

struct noncopyable_function_object_type

{

  noncopyable_function_object_type(secret) {}

  int operator()() const { return 42; }

  int operator()()       { return 17; }

 private:

  noncopyable_function_object_type();

  noncopyable_function_object_type(const noncopyable_function_object_type&);

  void operator=(const noncopyable_function_object_type&);

};

// Put reference_wrappers into function<> wrappers

void test06()

{

  using std::function;

  using std::ref;

  using std::cref;

  secret password;

  noncopyable_function_object_type x(password);

  function<int()> f(ref(x));

  VERIFY( f );

  VERIFY( f() == 17 );

  VERIFY( f.target_type() == typeid(noncopyable_function_object_type) );

  VERIFY( f.target<noncopyable_function_object_type>() == &x );

  function<int()> g = f;

  VERIFY( g );

  VERIFY( g() == 17 );

  VERIFY( g.target_type() == typeid(noncopyable_function_object_type) );

  VERIFY( g.target<noncopyable_function_object_type>() == &x );

  function<int()> h = cref(x);

  VERIFY( h );

  VERIFY( h() == 42 );

  VERIFY( h.target_type() == typeid(noncopyable_function_object_type) );

  VERIFY( h.target<const noncopyable_function_object_type>() == &x );

  VERIFY( h.target<const noncopyable_function_object_type>() == &x );

  const function<int()>& hc = h;

  VERIFY( h.target<noncopyable_function_object_type>() == 0 );

  VERIFY( hc.target<noncopyable_function_object_type>() == &x );

}

int main()

{

  test06();

  return 0;

}