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// Debugging set implementation -*- C++ -*-

// Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 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.

// Under Section 7 of GPL version 3, you are granted additional

// permissions described in the GCC Runtime Library Exception, version

// 3.1, as published by the Free Software Foundation.

// You should have received a copy of the GNU General Public License and

// a copy of the GCC Runtime Library Exception along with this program;

// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see

// <http://www.gnu.org/licenses/>.

/** @file debug/set.h

 *  This file is a GNU debug extension to the Standard C++ Library.

 */

#ifndef _GLIBCXX_DEBUG_SET_H

#define _GLIBCXX_DEBUG_SET_H 1

#include <debug/safe_sequence.h>

#include <debug/safe_iterator.h>

#include <utility>

namespace std

{

namespace __debug

{

  /// Class std::set with safety/checking/debug instrumentation.

  template<typename _Key, typename _Compare = std::less<_Key>,

           typename _Allocator = std::allocator<_Key> >

    class set

    : public _GLIBCXX_STD_D::set<_Key,_Compare,_Allocator>,

      public __gnu_debug::_Safe_sequence<set<_Key, _Compare, _Allocator> >

    {

      typedef _GLIBCXX_STD_D::set<_Key, _Compare, _Allocator> _Base;

      typedef __gnu_debug::_Safe_sequence<set> _Safe_base;

    public:

      // types:

      typedef _Key                                  key_type;

      typedef _Key                                  value_type;

      typedef _Compare                              key_compare;

      typedef _Compare                              value_compare;

      typedef _Allocator                            allocator_type;

      typedef typename _Base::reference             reference;

      typedef typename _Base::const_reference       const_reference;

      typedef __gnu_debug::_Safe_iterator<typename _Base::iterator, set>

                                                    iterator;

      typedef __gnu_debug::_Safe_iterator<typename _Base::const_iterator, set>

                                                    const_iterator;

      typedef typename _Base::size_type             size_type;

      typedef typename _Base::difference_type       difference_type;

      typedef typename _Base::pointer               pointer;

      typedef typename _Base::const_pointer         const_pointer;

      typedef std::reverse_iterator<iterator>       reverse_iterator;

      typedef std::reverse_iterator<const_iterator> const_reverse_iterator;

      // 23.3.3.1 construct/copy/destroy:

      explicit set(const _Compare& __comp = _Compare(),

                   const _Allocator& __a = _Allocator())

      : _Base(__comp, __a) { }

      template<typename _InputIterator>

        set(_InputIterator __first, _InputIterator __last,

            const _Compare& __comp = _Compare(),

            const _Allocator& __a = _Allocator())

        : _Base(__gnu_debug::__check_valid_range(__first, __last), __last,

                __comp, __a) { }

      set(const set& __x)

      : _Base(__x), _Safe_base() { }

      set(const _Base& __x)

      : _Base(__x), _Safe_base() { }

#ifdef __GXX_EXPERIMENTAL_CXX0X__

      set(set&& __x)

      : _Base(std::forward<set>(__x)), _Safe_base()

      { this->_M_swap(__x); }

      set(initializer_list<value_type> __l,

          const _Compare& __comp = _Compare(),

          const allocator_type& __a = allocator_type())

      : _Base(__l, __comp, __a), _Safe_base() { }

#endif

      ~set() { }

      set&

      operator=(const set& __x)

      {

        *static_cast<_Base*>(this) = __x;

        this->_M_invalidate_all();

        return *this;

      }

#ifdef __GXX_EXPERIMENTAL_CXX0X__

      set&

      operator=(set&& __x)

      {

        // NB: DR 1204.

        // NB: DR 675.

        clear();

        swap(__x);

        return *this;

      }

      set&

      operator=(initializer_list<value_type> __l)

      {

        this->clear();

        this->insert(__l);

        return *this;

      }

#endif

      using _Base::get_allocator;

      // iterators:

      iterator

      begin()

      { return iterator(_Base::begin(), this); }

      const_iterator

      begin() const

      { return const_iterator(_Base::begin(), this); }

      iterator

      end()

      { return iterator(_Base::end(), this); }

      const_iterator

      end() const

      { return const_iterator(_Base::end(), this); }

      reverse_iterator

      rbegin()

      { return reverse_iterator(end()); }

      const_reverse_iterator

      rbegin() const

      { return const_reverse_iterator(end()); }

      reverse_iterator

      rend()

      { return reverse_iterator(begin()); }

      const_reverse_iterator

      rend() const

      { return const_reverse_iterator(begin()); }

#ifdef __GXX_EXPERIMENTAL_CXX0X__

      const_iterator

      cbegin() const

      { return const_iterator(_Base::begin(), this); }

      const_iterator

      cend() const

      { return const_iterator(_Base::end(), this); }

      const_reverse_iterator

      crbegin() const

      { return const_reverse_iterator(end()); }

      const_reverse_iterator

      crend() const

      { return const_reverse_iterator(begin()); }

#endif

      // capacity:

      using _Base::empty;

      using _Base::size;

      using _Base::max_size;

      // modifiers:

      std::pair<iterator, bool>

      insert(const value_type& __x)

      {

        typedef typename _Base::iterator _Base_iterator;

        std::pair<_Base_iterator, bool> __res = _Base::insert(__x);

        return std::pair<iterator, bool>(iterator(__res.first, this),

                                         __res.second);

      }

      iterator

      insert(iterator __position, const value_type& __x)

      {

        __glibcxx_check_insert(__position);

        return iterator(_Base::insert(__position.base(), __x), this);

      }

      template <typename _InputIterator>

        void

        insert(_InputIterator __first, _InputIterator __last)

        {

          __glibcxx_check_valid_range(__first, __last);

          _Base::insert(__first, __last);

        }

#ifdef __GXX_EXPERIMENTAL_CXX0X__

      void

      insert(initializer_list<value_type> __l)

      { _Base::insert(__l); }

#endif

#ifdef __GXX_EXPERIMENTAL_CXX0X__

      iterator

      erase(iterator __position)

      {

        __glibcxx_check_erase(__position);

        __position._M_invalidate();

        return iterator(_Base::erase(__position.base()), this);

      }

#else

      void

      erase(iterator __position)

      {

        __glibcxx_check_erase(__position);

        __position._M_invalidate();

        _Base::erase(__position.base());

      }

#endif

      size_type

      erase(const key_type& __x)

      {

        iterator __victim = find(__x);

        if (__victim == end())

          return 0;

        else

        {

          __victim._M_invalidate();

          _Base::erase(__victim.base());

          return 1;

        }

      }

#ifdef __GXX_EXPERIMENTAL_CXX0X__

      iterator

      erase(iterator __first, iterator __last)

      {

        // _GLIBCXX_RESOLVE_LIB_DEFECTS

        // 151. can't currently clear() empty container

        __glibcxx_check_erase_range(__first, __last);

        while (__first != __last)

          this->erase(__first++);

        return __last;

      }

#else

      void

      erase(iterator __first, iterator __last)

      {

        // _GLIBCXX_RESOLVE_LIB_DEFECTS

        // 151. can't currently clear() empty container

        __glibcxx_check_erase_range(__first, __last);

        while (__first != __last)

          this->erase(__first++);

      }

#endif

      void

      swap(set& __x)

      {

        _Base::swap(__x);

        this->_M_swap(__x);

      }

      void

      clear()

      { this->erase(begin(), end()); }

      // observers:

      using _Base::key_comp;

      using _Base::value_comp;

      // set operations:

      iterator

      find(const key_type& __x)

      { return iterator(_Base::find(__x), this); }

      // _GLIBCXX_RESOLVE_LIB_DEFECTS

      // 214. set::find() missing const overload

      const_iterator

      find(const key_type& __x) const

      { return const_iterator(_Base::find(__x), this); }

      using _Base::count;

      iterator

      lower_bound(const key_type& __x)

      { return iterator(_Base::lower_bound(__x), this); }

      // _GLIBCXX_RESOLVE_LIB_DEFECTS

      // 214. set::find() missing const overload

      const_iterator

      lower_bound(const key_type& __x) const

      { return const_iterator(_Base::lower_bound(__x), this); }

      iterator

      upper_bound(const key_type& __x)

      { return iterator(_Base::upper_bound(__x), this); }

      // _GLIBCXX_RESOLVE_LIB_DEFECTS

      // 214. set::find() missing const overload

      const_iterator

      upper_bound(const key_type& __x) const

      { return const_iterator(_Base::upper_bound(__x), this); }

      std::pair<iterator,iterator>

      equal_range(const key_type& __x)

      {

        typedef typename _Base::iterator _Base_iterator;

        std::pair<_Base_iterator, _Base_iterator> __res =

        _Base::equal_range(__x);

        return std::make_pair(iterator(__res.first, this),

                              iterator(__res.second, this));

      }

      // _GLIBCXX_RESOLVE_LIB_DEFECTS

      // 214. set::find() missing const overload

      std::pair<const_iterator,const_iterator>

      equal_range(const key_type& __x) const

      {

        typedef typename _Base::const_iterator _Base_iterator;

        std::pair<_Base_iterator, _Base_iterator> __res =

        _Base::equal_range(__x);

        return std::make_pair(const_iterator(__res.first, this),

                              const_iterator(__res.second, this));

      }

      _Base&

      _M_base() { return *this; }

      const _Base&

      _M_base() const { return *this; }

    private:

      void

      _M_invalidate_all()

      {

        typedef typename _Base::const_iterator _Base_const_iterator;

        typedef __gnu_debug::_Not_equal_to<_Base_const_iterator> _Not_equal;

        this->_M_invalidate_if(_Not_equal(_M_base().end()));

      }

    };

  template<typename _Key, typename _Compare, typename _Allocator>

    inline bool

    operator==(const set<_Key, _Compare, _Allocator>& __lhs,

               const set<_Key, _Compare, _Allocator>& __rhs)

    { return __lhs._M_base() == __rhs._M_base(); }

  template<typename _Key, typename _Compare, typename _Allocator>

    inline bool

    operator!=(const set<_Key, _Compare, _Allocator>& __lhs,

               const set<_Key, _Compare, _Allocator>& __rhs)

    { return __lhs._M_base() != __rhs._M_base(); }

  template<typename _Key, typename _Compare, typename _Allocator>

    inline bool

    operator<(const set<_Key, _Compare, _Allocator>& __lhs,

              const set<_Key, _Compare, _Allocator>& __rhs)

    { return __lhs._M_base() < __rhs._M_base(); }

  template<typename _Key, typename _Compare, typename _Allocator>

    inline bool

    operator<=(const set<_Key, _Compare, _Allocator>& __lhs,

               const set<_Key, _Compare, _Allocator>& __rhs)

    { return __lhs._M_base() <= __rhs._M_base(); }

  template<typename _Key, typename _Compare, typename _Allocator>

    inline bool

    operator>=(const set<_Key, _Compare, _Allocator>& __lhs,

               const set<_Key, _Compare, _Allocator>& __rhs)

    { return __lhs._M_base() >= __rhs._M_base(); }

  template<typename _Key, typename _Compare, typename _Allocator>

    inline bool

    operator>(const set<_Key, _Compare, _Allocator>& __lhs,

              const set<_Key, _Compare, _Allocator>& __rhs)

    { return __lhs._M_base() > __rhs._M_base(); }

  template<typename _Key, typename _Compare, typename _Allocator>

    void

    swap(set<_Key, _Compare, _Allocator>& __x,

         set<_Key, _Compare, _Allocator>& __y)

    { return __x.swap(__y); }

} // namespace __debug

} // namespace std

#endif