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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;

// Operations on empty function<> objects

void test01()

{

  using std::function;

  using std::bad_function_call;

  // Default-construction

  function<int(float)> f1;

  VERIFY( ((bool)f1 == false) );

  VERIFY( !f1 );

  VERIFY( f1 == 0 );

  VERIFY( 0 == f1 );

  VERIFY( !(f1 != 0) );

  VERIFY( !(0 != f1) );

  // Copy-construction

  function<int(float)> f2(f1);

  VERIFY( !f2 );

  // Construct with NULL pointer

  function<int(float)> f3(0);

  VERIFY( !f3 );

  // Assignment

  f1 = f2;

  VERIFY( !f1);

  // Assignment to NULL pointer

  f1 = 0;

  VERIFY( !f1 );

  // Swap

  swap(f1, f2);

  VERIFY( !f1 );

  VERIFY( !f2 );

  // Invocation should throw bad_function_call

  bool thrown = false;

  try

    {

      f1(3.14159f);

      VERIFY( false );

    }

  catch (bad_function_call)

    {

      thrown = true;

    }

  VERIFY( thrown );

  // target_type returns typeid(void)

  VERIFY( f1.target_type() == typeid(void) );

  // target() always returns a NULL pointer

  VERIFY( f1.target<int (*)(float)>() == 0);

  // Check const version

  const function<int(float)>& f1c = f1;

  VERIFY( f1c.target<int (*)(float)>() == 0 );

  VERIFY( !f1c );

}

int main()

{

  test01();

  return 0;

}