stl_set.h

mingw32.rar

      /**
       *  @brief Attempts to insert an element into the %set.
       *  @param  x  Element to be inserted.
       *  @return  A pair, of which the first element is an iterator that points
       *           to the possibly inserted element, and the second is a bool
       *           that is true if the element was actually inserted.
       *
       *  This function attempts to insert an element into the %set.  A %set
       *  relies on unique keys and thus an element is only inserted if it is
       *  not already present in the %set.
       *
       *  Insertion requires logarithmic time.
       */
      pair<iterator,bool>
      insert(const value_type& __x)
      {
	pair<typename _Rep_type::iterator, bool> __p = _M_t.insert_unique(__x);
	return pair<iterator, bool>(__p.first, __p.second);
      }

      /**
       *  @brief Attempts to insert an element into the %set.
       *  @param  position  An iterator that serves as a hint as to where the
       *                    element should be inserted.
       *  @param  x  Element to be inserted.
       *  @return  An iterator that points to the element with key of @a x (may
       *           or may not be the element passed in).
       *
       *  This function is not concerned about whether the insertion took place,
       *  and thus does not return a boolean like the single-argument insert()
       *  does.  Note that the first parameter is only a hint and can
       *  potentially improve the performance of the insertion process.  A bad
       *  hint would cause no gains in efficiency.
       *
       *  See http://gcc.gnu.org/onlinedocs/libstdc++/23_containers/howto.html#4
       *  for more on "hinting".
       *
       *  Insertion requires logarithmic time (if the hint is not taken).
       */
      iterator
      insert(iterator __position, const value_type& __x)
      {
	typedef typename _Rep_type::iterator _Rep_iterator;
	return _M_t.insert_unique((_Rep_iterator&)__position, __x);
      }

      /**
       *  @brief A template function that attemps to insert a range of elements.
       *  @param  first  Iterator pointing to the start of the range to be
       *                 inserted.
       *  @param  last  Iterator pointing to the end of the range.
       *
       *  Complexity similar to that of the range constructor.
       */
      template<class _InputIterator>
      void
      insert(_InputIterator __first, _InputIterator __last)
      { _M_t.insert_unique(__first, __last); }

      /**
       *  @brief Erases an element from a %set.
       *  @param  position  An iterator pointing to the element to be erased.
       *
       *  This function erases an element, pointed to by the given iterator,
       *  from a %set.  Note that this function only erases the element, and
       *  that if the element is itself a pointer, the pointed-to memory is not
       *  touched in any way.  Managing the pointer is the user's responsibilty.
       */
      void
      erase(iterator __position)
      {
	typedef typename _Rep_type::iterator _Rep_iterator;
	_M_t.erase((_Rep_iterator&)__position);
      }

      /**
       *  @brief Erases elements according to the provided key.
       *  @param  x  Key of element to be erased.
       *  @return  The number of elements erased.
       *
       *  This function erases all the elements located by the given key from
       *  a %set.
       *  Note that this function only erases the element, and that if
       *  the element is itself a pointer, the pointed-to memory is not touched
       *  in any way.  Managing the pointer is the user's responsibilty.
       */
      size_type
      erase(const key_type& __x) { return _M_t.erase(__x); }

      /**
       *  @brief Erases a [first,last) range of elements from a %set.
       *  @param  first  Iterator pointing to the start of the range to be
       *                 erased.
       *  @param  last  Iterator pointing to the end of the range to be erased.
       *
       *  This function erases a sequence of elements from a %set.
       *  Note that this function only erases the element, and that if
       *  the element is itself a pointer, the pointed-to memory is not touched
       *  in any way.  Managing the pointer is the user's responsibilty.
       */
      void
      erase(iterator __first, iterator __last)
      {
	typedef typename _Rep_type::iterator _Rep_iterator;
	_M_t.erase((_Rep_iterator&)__first, (_Rep_iterator&)__last);
      }

      /**
       *  Erases all elements in a %set.  Note that this function only erases
       *  the elements, and that if the elements themselves are pointers, the
       *  pointed-to memory is not touched in any way.  Managing the pointer is
       *  the user's responsibilty.
       */
      void
      clear()
      { _M_t.clear(); }

      // set operations:

      /**
       *  @brief  Finds the number of elements.
       *  @param  x  Element to located.
       *  @return  Number of elements with specified key.
       *
       *  This function only makes sense for multisets; for set the result will
       *  either be 0 (not present) or 1 (present).
       */
      size_type
      count(const key_type& __x) const
      { return _M_t.find(__x) == _M_t.end() ? 0 : 1; }

      // _GLIBCXX_RESOLVE_LIB_DEFECTS
      // 214.  set::find() missing const overload
      //@{
      /**
       *  @brief Tries to locate an element in a %set.
       *  @param  x  Element to be located.
       *  @return  Iterator pointing to sought-after element, or end() if not
       *           found.
       *
       *  This function takes a key and tries to locate the element with which
       *  the key matches.  If successful the function returns an iterator
       *  pointing to the sought after element.  If unsuccessful it returns the
       *  past-the-end ( @c end() ) iterator.
       */
      iterator
      find(const key_type& __x)
      { return _M_t.find(__x); }

      const_iterator
      find(const key_type& __x) const
      { return _M_t.find(__x); }
      //@}

      //@{
      /**
       *  @brief Finds the beginning of a subsequence matching given key.
       *  @param  x  Key to be located.
       *  @return  Iterator pointing to first element equal to or greater
       *           than key, or end().
       *
       *  This function returns the first element of a subsequence of elements
       *  that matches the given key.  If unsuccessful it returns an iterator
       *  pointing to the first element that has a greater value than given key
       *  or end() if no such element exists.
       */
      iterator
      lower_bound(const key_type& __x)
      { return _M_t.lower_bound(__x); }

      const_iterator
      lower_bound(const key_type& __x) const
      { return _M_t.lower_bound(__x); }
      //@}

      //@{
      /**
       *  @brief Finds the end of a subsequence matching given key.
       *  @param  x  Key to be located.
       *  @return Iterator pointing to the first element
       *          greater than key, or end().
       */
      iterator
      upper_bound(const key_type& __x)
      { return _M_t.upper_bound(__x); }

      const_iterator
      upper_bound(const key_type& __x) const
      { return _M_t.upper_bound(__x); }
      //@}

      //@{
      /**
       *  @brief Finds a subsequence matching given key.
       *  @param  x  Key to be located.
       *  @return  Pair of iterators that possibly points to the subsequence
       *           matching given key.
       *
       *  This function is equivalent to
       *  @code
       *    std::make_pair(c.lower_bound(val),
       *                   c.upper_bound(val))
       *  @endcode
       *  (but is faster than making the calls separately).
       *
       *  This function probably only makes sense for multisets.
       */
      pair<iterator,iterator>
      equal_range(const key_type& __x)
      { return _M_t.equal_range(__x); }

      pair<const_iterator,const_iterator>
      equal_range(const key_type& __x) const
      { return _M_t.equal_range(__x); }
      //@}

      template<class _K1, class _C1, class _A1>
        friend bool
        operator== (const set<_K1,_C1,_A1>&, const set<_K1,_C1,_A1>&);

      template<class _K1, class _C1, class _A1>
        friend bool
        operator< (const set<_K1,_C1,_A1>&, const set<_K1,_C1,_A1>&);
    };


  /**
   *  @brief  Set equality comparison.
   *  @param  x  A %set.
   *  @param  y  A %set of the same type as @a x.
   *  @return  True iff the size and elements of the sets are equal.
   *
   *  This is an equivalence relation.  It is linear in the size of the sets.
   *  Sets are considered equivalent if their sizes are equal, and if
   *  corresponding elements compare equal.
  */
  template<class _Key, class _Compare, class _Alloc>
    inline bool
    operator==(const set<_Key,_Compare,_Alloc>& __x,
	       const set<_Key,_Compare,_Alloc>& __y)
    { return __x._M_t == __y._M_t; }

  /**
   *  @brief  Set ordering relation.
   *  @param  x  A %set.
   *  @param  y  A %set of the same type as @a x.
   *  @return  True iff @a x is lexicographically less than @a y.
   *
   *  This is a total ordering relation.  It is linear in the size of the
   *  maps.  The elements must be comparable with @c <.
   *
   *  See std::lexicographical_compare() for how the determination is made.
  */
  template<class _Key, class _Compare, class _Alloc>
    inline bool
    operator<(const set<_Key,_Compare,_Alloc>& __x,
	      const set<_Key,_Compare,_Alloc>& __y)
    { return __x._M_t < __y._M_t; }

  ///  Returns !(x == y).
  template<class _Key, class _Compare, class _Alloc>
    inline bool
    operator!=(const set<_Key,_Compare,_Alloc>& __x,
	       const set<_Key,_Compare,_Alloc>& __y)
    { return !(__x == __y); }

  ///  Returns y < x.
  template<class _Key, class _Compare, class _Alloc>
    inline bool
    operator>(const set<_Key,_Compare,_Alloc>& __x,
	      const set<_Key,_Compare,_Alloc>& __y)
    { return __y < __x; }

  ///  Returns !(y < x)
  template<class _Key, class _Compare, class _Alloc>
    inline bool
    operator<=(const set<_Key,_Compare,_Alloc>& __x,
	       const set<_Key,_Compare,_Alloc>& __y)
    { return !(__y < __x); }

  ///  Returns !(x < y)
  template<class _Key, class _Compare, class _Alloc>
    inline bool
    operator>=(const set<_Key,_Compare,_Alloc>& __x,
	       const set<_Key,_Compare,_Alloc>& __y)
    { return !(__x < __y); }

  /// See std::set::swap().
  template<class _Key, class _Compare, class _Alloc>
    inline void
    swap(set<_Key,_Compare,_Alloc>& __x, set<_Key,_Compare,_Alloc>& __y)
    { __x.swap(__y); }

} // namespace std

#endif /* _SET_H */