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

// 2010-08-11  Paolo Carlini  <paolo.carlini@oracle.com>

//

// Copyright (C) 2010 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/>.

#include <forward_list>

#include <testsuite_hooks.h>

// 23.3.3.5 forward_list operations [forwardlist.ops]

// Used to cause many Valgrind errors: LWG 526-type situation.

void test01()

{

  bool test __attribute__((unused)) = true;

  std::forward_list<int> fl1;

  fl1.push_front(1);

  fl1.push_front(2);

  fl1.push_front(3);

  fl1.push_front(4);

  fl1.push_front(1);

  fl1.remove(*fl1.begin());

  VERIFY( std::distance(fl1.begin(), fl1.end()) == 3 );

  auto it1 = fl1.begin();

  VERIFY( *it1 == 4 );

  ++it1;

  VERIFY( *it1 == 3 );

  ++it1;

  VERIFY( *it1 == 2 );

  std::forward_list<int> fl2;

  fl2.push_front(3);

  fl2.push_front(3);

  fl2.push_front(3);

  fl2.push_front(3);

  fl2.push_front(3);

  auto it2 = fl2.begin();

  ++it2;

  ++it2;

  fl2.remove(*it2);

  VERIFY( std::distance(fl2.begin(), fl2.end()) == 0 );

  std::forward_list<int> fl3;

  fl3.push_front(1);

  fl3.push_front(2);

  fl3.push_front(3);

  fl3.push_front(3);

  fl3.push_front(3);

  auto it3 = fl3.begin();

  ++it3;

  ++it3;

  fl3.remove(*it3);

  VERIFY( std::distance(fl3.begin(), fl3.end()) == 2 );

  it3 = fl3.begin();

  VERIFY( *it3 == 2 );

  ++it3;

  VERIFY( *it3 == 1 );

}

int main()

{

  test01();

  return 0;

}