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

//

// Copyright (C) 2005 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 2, 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 COPYING.  If not, write to the Free

// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,

// USA.

// 3.7.2 polymorphic function object wrapper

#include <tr1/functional>

#include <testsuite_hooks.h>

#include <testsuite_tr1.h>

using namespace __gnu_test;

bool test __attribute__((unused)) = true;

// Put nearly-matching function pointers into function<> wrappers

void test03()

{

  using std::tr1::function;

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

  VERIFY( f1 );

  VERIFY( !!f1 );

  VERIFY( !(f1 == 0) );

  VERIFY( !(0 == f1) );

  VERIFY( f1 != 0 );

  VERIFY( 0 != f1 );

  // Copy-construction

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

  VERIFY( f2 );

  // Invocation

  VERIFY( f1(3.1f) == 3 );

  VERIFY( f2(3.1f) == 3 );

  // Assignment to zero

  f1 = 0;

  VERIFY( !f1 );

  // Swap

  f1.swap(f2);

  VERIFY( f1 );

  VERIFY( !f2 );

  VERIFY( f1(3.1f) == 3 );

  // Assignment from a function pointer

  f2 = truncate_double;

  VERIFY( f2(3.1f) == 3 );

  // target_type and target() functions

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

  VERIFY( typeid(long(*)(double)) == f1.target_type() );

  VERIFY( f2.target<long(*)(double)>() != 0 );

  VERIFY( *f2.target<long(*)(double)>() == &truncate_double );

  VERIFY( f1c.target<long(*)(double)>() != 0 );

  VERIFY( *f1c.target<long(*)(double)>() == &truncate_double );

}

int main()

{

  test03();

  return 0;

}