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

// 2010-02-10  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 <unordered_set>

#include <string>

#include <testsuite_hooks.h>

namespace

{

  std::size_t

  get_nb_bucket_elems(const std::unordered_set<std::string>& us)

  {

    std::size_t nb = 0;

    for (std::size_t b = 0; b != us.bucket_count(); ++b)

      nb += us.bucket_size(b);

    return nb;

  }

}

void test01()

{

  bool test __attribute__((unused)) = true;

  typedef std::unordered_set<std::string> Set;

  typedef Set::iterator       iterator;

  typedef Set::const_iterator const_iterator;

  Set s1;

  s1.insert("because to why");

  s1.insert("the stockholm syndrome");

  s1.insert("a cereous night");

  s1.insert("eeilo");

  s1.insert("protean");

  s1.insert("the way you are when");

  s1.insert("tillsammans");

  s1.insert("umbra/penumbra");

  s1.insert("belonging (no longer mix)");

  s1.insert("one line behind");

  VERIFY( s1.size() == 10 );

  VERIFY( get_nb_bucket_elems(s1) == s1.size() );

  VERIFY( distance(s1.begin(), s1.end()) == s1.size() );

  VERIFY( s1.erase("eeilo") == 1 );

  VERIFY( s1.size() == 9 );

  VERIFY( get_nb_bucket_elems(s1) == s1.size() );

  VERIFY( distance(s1.begin(), s1.end()) == s1.size() );

  iterator it1 = s1.find("eeilo");

  VERIFY( it1 == s1.end() );

  VERIFY( s1.erase("tillsammans") == 1 );

  VERIFY( s1.size() == 8 );

  VERIFY( get_nb_bucket_elems(s1) == s1.size() );

  VERIFY( distance(s1.begin(), s1.end()) == s1.size() );

  iterator it2 = s1.find("tillsammans");

  VERIFY( it2 == s1.end() );

  // Must work (see DR 526)

  iterator it3 = s1.find("belonging (no longer mix)");

  VERIFY( it3 != s1.end() );

  VERIFY( s1.erase(*it3) == 1 );

  VERIFY( s1.size() == 7 );

  VERIFY( get_nb_bucket_elems(s1) == s1.size() );

  VERIFY( distance(s1.begin(), s1.end()) == s1.size() );

  it3 = s1.find("belonging (no longer mix)");

  VERIFY( it3 == s1.end() );

  VERIFY( !s1.erase("abra") );

  VERIFY( s1.size() == 7 );

  VERIFY( get_nb_bucket_elems(s1) == s1.size() );

  VERIFY( distance(s1.begin(), s1.end()) == s1.size() );

  VERIFY( !s1.erase("eeilo") );

  VERIFY( s1.size() == 7 );

  VERIFY( s1.erase("because to why") == 1 );

  VERIFY( s1.size() == 6 );

  VERIFY( get_nb_bucket_elems(s1) == s1.size() );

  VERIFY( distance(s1.begin(), s1.end()) == s1.size() );

  iterator it4 = s1.find("because to why");

  VERIFY( it4 == s1.end() );

  iterator it5 = s1.find("umbra/penumbra");

  iterator it6 = s1.find("one line behind");

  VERIFY( it5 != s1.end() );

  VERIFY( it6 != s1.end() );

  VERIFY( s1.find("the stockholm syndrome") != s1.end() );

  VERIFY( s1.find("a cereous night") != s1.end() );

  VERIFY( s1.find("the way you are when") != s1.end() );

  VERIFY( s1.find("a cereous night") != s1.end() );

  VERIFY( s1.erase(*it5) == 1 );

  VERIFY( s1.size() == 5 );

  VERIFY( get_nb_bucket_elems(s1) == s1.size() );

  VERIFY( distance(s1.begin(), s1.end()) == s1.size() );

  it5 = s1.find("umbra/penumbra");

  VERIFY( it5 == s1.end() );

  VERIFY( s1.erase(*it6) == 1 );

  VERIFY( s1.size() == 4 );

  VERIFY( get_nb_bucket_elems(s1) == s1.size() );

  VERIFY( distance(s1.begin(), s1.end()) == s1.size() );

  it6 = s1.find("one line behind");

  VERIFY( it6 == s1.end() );

  iterator it7 = s1.begin();

  iterator it8 = it7;

  ++it8;

  iterator it9 = it8;

  ++it9;

  VERIFY( s1.erase(*it8) == 1 );

  VERIFY( s1.size() == 3 );

  VERIFY( get_nb_bucket_elems(s1) == s1.size() );

  VERIFY( distance(s1.begin(), s1.end()) == s1.size() );

  VERIFY( ++it7 == it9 );

  iterator it10 = it9;

  ++it10;

  iterator it11 = it10;

  VERIFY( s1.erase(*it9) == 1 );

  VERIFY( get_nb_bucket_elems(s1) == s1.size() );

  VERIFY( distance(s1.begin(), s1.end()) == s1.size() );

  VERIFY( s1.size() == 2 );

  VERIFY( ++it10 == s1.end() );

  VERIFY( s1.erase(s1.begin()) != s1.end() );

  VERIFY( s1.size() == 1 );

  VERIFY( get_nb_bucket_elems(s1) == s1.size() );

  VERIFY( distance(s1.begin(), s1.end()) == s1.size() );

  VERIFY( s1.begin() == it11 );

  VERIFY( s1.erase(*s1.begin()) == 1 );

  VERIFY( s1.size() == 0 );

  VERIFY( get_nb_bucket_elems(s1) == s1.size() );

  VERIFY( distance(s1.begin(), s1.end()) == s1.size() );

  VERIFY( s1.begin() == s1.end() );

}

int main()

{

  test01();

  return 0;

}