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

// Copyright (C) 2011 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_map>

#include <string>

#include <testsuite_hooks.h>

namespace

{

  std::size_t

  get_nb_bucket_elems(const std::unordered_multimap<std::string, int>& um)

  {

    std::size_t nb = 0;

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

      nb += um.bucket_size(b);

    return nb;

  }

}

void test01()

{

  bool test __attribute__((unused)) = true;

  typedef std::unordered_multimap<std::string, int> Mmap;

  typedef Mmap::iterator       iterator;

  typedef Mmap::const_iterator const_iterator;

  typedef Mmap::value_type     value_type;

  Mmap mm1;

  mm1.insert(value_type("foo", 10));

  mm1.insert(value_type("foo", 11));

  mm1.insert(value_type("foo", 12));

  mm1.insert(value_type("foo", 13));

  mm1.insert(value_type("foo", 14));

  mm1.insert(value_type("foo", 15));

  mm1.insert(value_type("bar", 20));

  mm1.insert(value_type("bar", 21));

  mm1.insert(value_type("bar", 22));

  mm1.insert(value_type("bar", 23));

  mm1.insert(value_type("bar", 24));

  mm1.insert(value_type("bar", 25));

  VERIFY( mm1.size() == 12 );

  VERIFY( get_nb_bucket_elems(mm1) == mm1.size() );

  VERIFY( distance(mm1.begin(), mm1.end()) == mm1.size() );

  VERIFY( mm1.erase(mm1.begin()) != mm1.end() );

  VERIFY( mm1.size() == 11 );

  VERIFY( get_nb_bucket_elems(mm1) == mm1.size() );

  VERIFY( distance(mm1.begin(), mm1.end()) == mm1.size() );

  auto it = mm1.begin();

  advance(it, 2);

  VERIFY( mm1.erase(mm1.begin(), it) != mm1.end() );

  VERIFY( mm1.size() == 9 );

  VERIFY( get_nb_bucket_elems(mm1) == mm1.size() );

  VERIFY( distance(mm1.begin(), mm1.end()) == mm1.size() );

  VERIFY( mm1.erase(mm1.begin()->first) == 3 );

  VERIFY( mm1.size() == 6 );

  VERIFY( get_nb_bucket_elems(mm1) == mm1.size() );

  VERIFY( distance(mm1.begin(), mm1.end()) == mm1.size() );

  VERIFY( mm1.erase(mm1.begin(), mm1.end()) == mm1.end() );

  VERIFY( mm1.empty() );

  VERIFY( get_nb_bucket_elems(mm1) == mm1.size() );

  VERIFY( distance(mm1.begin(), mm1.end()) == mm1.size() );

}

int main()

{

  test01();

  return 0;

}