debug/set.h

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

// Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 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.

// 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 _GLIBCXX_VISIBILITY(default) 
{
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_C::set<_Key,_Compare,_Allocator>,
      public __gnu_debug::_Safe_sequence<set<_Key, _Compare, _Allocator> >
    {
      typedef _GLIBCXX_STD_C::set<_Key, _Compare, _Allocator> _Base;

      typedef typename _Base::const_iterator _Base_const_iterator;
      typedef typename _Base::iterator _Base_iterator;
      typedef __gnu_debug::_Equal_to<_Base_const_iterator> _Equal;
    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<_Base_iterator, set>
                                                    iterator;
      typedef __gnu_debug::_Safe_iterator<_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::__base(__gnu_debug::__check_valid_range(__first,
                                     __last)),
        __gnu_debug::__base(__last),
        __comp, __a) { }

      set(const set& __x)
      : _Base(__x) { }

      set(const _Base& __x)
      : _Base(__x) { }

#ifdef __GXX_EXPERIMENTAL_CXX0X__
      set(set&& __x)
      noexcept(is_nothrow_copy_constructible<_Compare>::value)
      : _Base(std::move(__x))
      { this->_M_swap(__x); }

      set(initializer_list<value_type> __l,
      const _Compare& __comp = _Compare(),
      const allocator_type& __a = allocator_type())
      : _Base(__l, __comp, __a) { }
#endif

      ~set() _GLIBCXX_NOEXCEPT { }

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

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

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

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

      reverse_iterator
      rbegin() _GLIBCXX_NOEXCEPT
      { return reverse_iterator(end()); }

      const_reverse_iterator
      rbegin() const _GLIBCXX_NOEXCEPT
      { return const_reverse_iterator(end()); }

      reverse_iterator
      rend() _GLIBCXX_NOEXCEPT
      { return reverse_iterator(begin()); }

      const_reverse_iterator
      rend() const _GLIBCXX_NOEXCEPT
      { return const_reverse_iterator(begin()); }

#ifdef __GXX_EXPERIMENTAL_CXX0X__
      const_iterator
      cbegin() const noexcept
      { return const_iterator(_Base::begin(), this); }

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

      const_reverse_iterator
      crbegin() const noexcept
      { return const_reverse_iterator(end()); }

      const_reverse_iterator
      crend() const noexcept
      { 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)
      {
    std::pair<_Base_iterator, bool> __res = _Base::insert(__x);
    return std::pair<iterator, bool>(iterator(__res.first, this),
                     __res.second);
      }

#ifdef __GXX_EXPERIMENTAL_CXX0X__
      std::pair<iterator, bool>
      insert(value_type&& __x)
      {
    std::pair<_Base_iterator, bool> __res
      = _Base::insert(std::move(__x));
    return std::pair<iterator, bool>(iterator(__res.first, this),
                     __res.second);
      }
#endif

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

#ifdef __GXX_EXPERIMENTAL_CXX0X__
      iterator
      insert(const_iterator __position, value_type&& __x)
      {
    __glibcxx_check_insert(__position);
    return iterator(_Base::insert(__position.base(), std::move(__x)),
            this);
      }
#endif

      template <typename _InputIterator>
        void
        insert(_InputIterator __first, _InputIterator __last)
        {
      __glibcxx_check_valid_range(__first, __last);
      _Base::insert(__gnu_debug::__base(__first),
            __gnu_debug::__base(__last));
    }

#ifdef __GXX_EXPERIMENTAL_CXX0X__
      void
      insert(initializer_list<value_type> __l)
      { _Base::insert(__l); }
#endif

#ifdef __GXX_EXPERIMENTAL_CXX0X__
      iterator
      erase(const_iterator __position)
      {
    __glibcxx_check_erase(__position);
    this->_M_invalidate_if(_Equal(__position.base()));
    return iterator(_Base::erase(__position.base()), this);
      }
#else
      void
      erase(iterator __position)
      {
    __glibcxx_check_erase(__position);
    this->_M_invalidate_if(_Equal(__position.base()));
    _Base::erase(__position.base());
      }
#endif

      size_type
      erase(const key_type& __x)
      {
    _Base_iterator __victim = _Base::find(__x);
    if (__victim == _Base::end())
          return 0;
    else
      {
        this->_M_invalidate_if(_Equal(__victim));
        _Base::erase(__victim);
        return 1;
      }
      }

#ifdef __GXX_EXPERIMENTAL_CXX0X__
      iterator
      erase(const_iterator __first, const_iterator __last)
      {
    // _GLIBCXX_RESOLVE_LIB_DEFECTS
    // 151. can't currently clear() empty container
    __glibcxx_check_erase_range(__first, __last);
    for (_Base_const_iterator __victim = __first.base();
         __victim != __last.base(); ++__victim)
      {
        _GLIBCXX_DEBUG_VERIFY(__victim != _Base::end(),
                  _M_message(__gnu_debug::__msg_valid_range)
                  ._M_iterator(__first, "first")
                  ._M_iterator(__last, "last"));
        this->_M_invalidate_if(_Equal(__victim));
      }
    return iterator(_Base::erase(__first.base(), __last.base()), this);
      }
#else
      void
      erase(iterator __first, iterator __last)
      {
    // _GLIBCXX_RESOLVE_LIB_DEFECTS
    // 151. can't currently clear() empty container
    __glibcxx_check_erase_range(__first, __last);
    for (_Base_iterator __victim = __first.base();
         __victim != __last.base(); ++__victim)
      {
        _GLIBCXX_DEBUG_VERIFY(__victim != _Base::end(),
                  _M_message(__gnu_debug::__msg_valid_range)
                  ._M_iterator(__first, "first")
                  ._M_iterator(__last, "last"));
        this->_M_invalidate_if(_Equal(__victim));
      }
    _Base::erase(__first.base(), __last.base());
      }
#endif

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

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

      // 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)
      {
    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
      {
    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() _GLIBCXX_NOEXCEPT       { return *this; }

      const _Base&
      _M_base() const _GLIBCXX_NOEXCEPT { return *this; }

    private:
      void
      _M_invalidate_all()
      {
    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