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// Debugging list implementation -*- C++ -*-

// Copyright (C) 2003, 2004, 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.

// As a special exception, you may use this file as part of a free software
// library without restriction.  Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License.  This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.

#ifndef _GLIBCXX_DEBUG_LIST
#define _GLIBCXX_DEBUG_LIST 1

#include <list>
#include <bits/stl_algo.h>
#include <debug/safe_sequence.h>
#include <debug/safe_iterator.h>

namespace __gnu_debug_def
{
  template<typename _Tp, typename _Allocator = std::allocator<_Tp> >
    class list
    : public _GLIBCXX_STD::list<_Tp, _Allocator>,
      public __gnu_debug::_Safe_sequence<list<_Tp, _Allocator> >
    {
      typedef _GLIBCXX_STD::list<_Tp, _Allocator> _Base;
      typedef __gnu_debug::_Safe_sequence<list>  _Safe_base;

    public:
      typedef typename _Base::reference             reference;
      typedef typename _Base::const_reference       const_reference;

      typedef __gnu_debug::_Safe_iterator<typename _Base::iterator, list>
                            iterator;
      typedef __gnu_debug::_Safe_iterator<typename _Base::const_iterator, list>
                            const_iterator;

      typedef typename _Base::size_type             size_type;
      typedef typename _Base::difference_type       difference_type;

      typedef _Tp                   value_type;
      typedef _Allocator                allocator_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;

      // 23.2.2.1 construct/copy/destroy:
      explicit list(const _Allocator& __a = _Allocator())
      : _Base(__a) { }

      explicit list(size_type __n, const _Tp& __value = _Tp(),
            const _Allocator& __a = _Allocator())
      : _Base(__n, __value, __a) { }

      template<class _InputIterator>
      list(_InputIterator __first, _InputIterator __last,
       const _Allocator& __a = _Allocator())
      : _Base(__gnu_debug::__check_valid_range(__first, __last), __last, __a)
      { }


      list(const list& __x) : _Base(__x), _Safe_base() { }

      list(const _Base& __x) : _Base(__x), _Safe_base() { }

      ~list() { }

      list&
      operator=(const list& __x)
      {
    static_cast<_Base&>(*this) = __x;
    this->_M_invalidate_all();
    return *this;
      }

      template<class _InputIterator>
        void
        assign(_InputIterator __first, _InputIterator __last)
        {
      __glibcxx_check_valid_range(__first, __last);
      _Base::assign(__first, __last);
      this->_M_invalidate_all();
    }

      void
      assign(size_type __n, const _Tp& __t)
      {
    _Base::assign(__n, __t);
    this->_M_invalidate_all();
      }

      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()); }

      // 23.2.2.2 capacity:
      using _Base::empty;
      using _Base::size;
      using _Base::max_size;

      void
      resize(size_type __sz, _Tp __c = _Tp())
      {
    this->_M_detach_singular();

    // if __sz < size(), invalidate all iterators in [begin+__sz, end())
    iterator __victim = begin();
    iterator __end = end();
    for (size_type __i = __sz; __victim != __end && __i > 0; --__i)
      ++__victim;

    while (__victim != __end)
      {
        iterator __real_victim = __victim++;
        __real_victim._M_invalidate();
      }

    try
      {
        _Base::resize(__sz, __c);
      }
    catch(...)
      {
        this->_M_revalidate_singular();
        __throw_exception_again;
      }
      }

      // element access:
      reference
      front()
      {
    __glibcxx_check_nonempty();
    return _Base::front();
      }

      const_reference
      front() const
      {
    __glibcxx_check_nonempty();
    return _Base::front();
      }

      reference
      back()
      {
    __glibcxx_check_nonempty();
    return _Base::back();
      }

      const_reference
      back() const
      {
    __glibcxx_check_nonempty();
    return _Base::back();
      }

      // 23.2.2.3 modifiers:
      using _Base::push_front;

      void
      pop_front()
      {
    __glibcxx_check_nonempty();
    iterator __victim = begin();
    __victim._M_invalidate();
    _Base::pop_front();
      }

      using _Base::push_back;

      void
      pop_back()
      {
    __glibcxx_check_nonempty();
    iterator __victim = end();
    --__victim;
    __victim._M_invalidate();
    _Base::pop_back();
      }

      iterator
      insert(iterator __position, const _Tp& __x)
      {
    __glibcxx_check_insert(__position);
    return iterator(_Base::insert(__position.base(), __x), this);
      }

      void
      insert(iterator __position, size_type __n, const _Tp& __x)
      {
    __glibcxx_check_insert(__position);
    _Base::insert(__position.base(), __n, __x);
      }

      template<class _InputIterator>
        void
        insert(iterator __position, _InputIterator __first,
           _InputIterator __last)
        {
      __glibcxx_check_insert_range(__position, __first, __last);
      _Base::insert(__position.base(), __first, __last);
    }

      iterator
      erase(iterator __position)
      {
    __glibcxx_check_erase(__position);
    __position._M_invalidate();
    return iterator(_Base::erase(__position.base()), this);
      }

      iterator
      erase(iterator __position, iterator __last)
      {
    // _GLIBCXX_RESOLVE_LIB_DEFECTS
    // 151. can't currently clear() empty container
    __glibcxx_check_erase_range(__position, __last);
    for (iterator __victim = __position; __victim != __last; )
      {
        iterator __old = __victim;
        ++__victim;
        __old._M_invalidate();
      }
    return iterator(_Base::erase(__position.base(), __last.base()), this);
      }

      void
      swap(list& __x)
      {
    _Base::swap(__x);
    this->_M_swap(__x);
      }

      void
      clear()
      {
    _Base::clear();
    this->_M_invalidate_all();
      }

      // 23.2.2.4 list operations:
      void
      splice(iterator __position, list& __x)
      {
    _GLIBCXX_DEBUG_VERIFY(&__x != this,
                  _M_message(::__gnu_debug::__msg_self_splice)
                  ._M_sequence(*this, "this"));
    this->splice(__position, __x, __x.begin(), __x.end());
      }

      void
      splice(iterator __position, list& __x, iterator __i)
      {
    __glibcxx_check_insert(__position);
    _GLIBCXX_DEBUG_VERIFY(__x.get_allocator() == this->get_allocator(),
                  _M_message(::__gnu_debug::__msg_splice_alloc)
                ._M_sequence(*this)._M_sequence(__x, "__x"));
    _GLIBCXX_DEBUG_VERIFY(__i._M_dereferenceable(),
                  _M_message(::__gnu_debug::__msg_splice_bad)
                  ._M_iterator(__i, "__i"));
    _GLIBCXX_DEBUG_VERIFY(__i._M_attached_to(&__x),
                  _M_message(::__gnu_debug::__msg_splice_other)
                 ._M_iterator(__i, "__i")._M_sequence(__x, "__x"));

    // _GLIBCXX_RESOLVE_LIB_DEFECTS
    // 250. splicing invalidates iterators
    this->_M_transfer_iter(__i);
    _Base::splice(__position.base(), __x._M_base(), __i.base());
      }

      void
      splice(iterator __position, list& __x, iterator __first, iterator __last)
      {
    __glibcxx_check_insert(__position);
    __glibcxx_check_valid_range(__first, __last);
    _GLIBCXX_DEBUG_VERIFY(__first._M_attached_to(&__x),
                  _M_message(::__gnu_debug::__msg_splice_other)
                  ._M_sequence(__x, "x")
                  ._M_iterator(__first, "first"));
    _GLIBCXX_DEBUG_VERIFY(__x.get_allocator() == this->get_allocator(),
                  _M_message(::__gnu_debug::__msg_splice_alloc)
                  ._M_sequence(*this)._M_sequence(__x));

    for (iterator __tmp = __first; __tmp != __last; )
      {
        _GLIBCXX_DEBUG_VERIFY(&__x != this || __tmp != __position,
                _M_message(::__gnu_debug::__msg_splice_overlap)
                  ._M_iterator(__tmp, "position")
                  ._M_iterator(__first, "first")
                  ._M_iterator(__last, "last"));
        iterator __victim = __tmp++;
        // _GLIBCXX_RESOLVE_LIB_DEFECTS
        // 250. splicing invalidates iterators
        this->_M_transfer_iter(__victim);
      }

    _Base::splice(__position.base(), __x._M_base(), __first.base(),
              __last.base());
      }

      void
      remove(const _Tp& __value)
      {
    for (iterator __x = begin(); __x.base() != _Base::end(); )
      {
        if (*__x == __value)
          __x = erase(__x);
        else
          ++__x;
      }
      }

      template<class _Predicate>
        void
        remove_if(_Predicate __pred)
        {
      for (iterator __x = begin(); __x.base() != _Base::end(); )
        {
          if (__pred(*__x))
        __x = erase(__x);
          else
        ++__x;
        }
    }

      void
      unique()
      {
    iterator __first = begin();
    iterator __last = end();
    if (__first == __last)
      return;
    iterator __next = __first;
    while (++__next != __last)
      {
        if (*__first == *__next)
          erase(__next);
        else
          __first = __next;
        __next = __first;
      }
      }

      template<class _BinaryPredicate>
        void
        unique(_BinaryPredicate __binary_pred)
        {
      iterator __first = begin();
      iterator __last = end();
      if (__first == __last)
        return;
      iterator __next = __first;
      while (++__next != __last)
        {
          if (__binary_pred(*__first, *__next))
        erase(__next);
          else
        __first = __next;
          __next = __first;
        }
    }

      void
      merge(list& __x)
      {
    __glibcxx_check_sorted(_Base::begin(), _Base::end());
    __glibcxx_check_sorted(__x.begin().base(), __x.end().base());
    for (iterator __tmp = __x.begin(); __tmp != __x.end(); )
      {
        iterator __victim = __tmp++;
        __victim._M_attach(&__x);
      }
    _Base::merge(__x._M_base());
      }

      template<class _Compare>
        void
        merge(list& __x, _Compare __comp)
        {
      __glibcxx_check_sorted_pred(_Base::begin(), _Base::end(), __comp);
      __glibcxx_check_sorted_pred(__x.begin().base(), __x.end().base(),
                      __comp);
      for (iterator __tmp = __x.begin(); __tmp != __x.end(); )
        {
          iterator __victim = __tmp++;
          __victim._M_attach(&__x);
        }
      _Base::merge(__x._M_base(), __comp);
    }

      void
      sort() { _Base::sort(); }

      template<typename _StrictWeakOrdering>
        void
        sort(_StrictWeakOrdering __pred) { _Base::sort(__pred); }

      using _Base::reverse;

      _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 _Tp, typename _Alloc>
    inline bool
    operator==(const list<_Tp, _Alloc>& __lhs, const list<_Tp, _Alloc>& __rhs)
    { return __lhs._M_base() == __rhs._M_base(); }

  template<typename _Tp, typename _Alloc>
    inline bool
    operator!=(const list<_Tp, _Alloc>& __lhs, const list<_Tp, _Alloc>& __rhs)
    { return __lhs._M_base() != __rhs._M_base(); }

  template<typename _Tp, typename _Alloc>
    inline bool
    operator<(const list<_Tp, _Alloc>& __lhs, const list<_Tp, _Alloc>& __rhs)
    { return __lhs._M_base() < __rhs._M_base(); }

  template<typename _Tp, typename _Alloc>
    inline bool
    operator<=(const list<_Tp, _Alloc>& __lhs, const list<_Tp, _Alloc>& __rhs)
    { return __lhs._M_base() <= __rhs._M_base(); }

  template<typename _Tp, typename _Alloc>
    inline bool
    operator>=(const list<_Tp, _Alloc>& __lhs, const list<_Tp, _Alloc>& __rhs)
    { return __lhs._M_base() >= __rhs._M_base(); }

  template<typename _Tp, typename _Alloc>
    inline bool
    operator>(const list<_Tp, _Alloc>& __lhs, const list<_Tp, _Alloc>& __rhs)
    { return __lhs._M_base() > __rhs._M_base(); }

  template<typename _Tp, typename _Alloc>
    inline void
    swap(list<_Tp, _Alloc>& __lhs, list<_Tp, _Alloc>& __rhs)
    { __lhs.swap(__rhs); }
} // namespace __gnu_debug_def

#endif

---