Iterator class for vector and basic_string

[Ryszard Kabatek <rysio@rumcajs.chemie.uni-halle.de>]

In my previous message I used four template paramters
for the iterator classes. I think we need only one parameter.

BTW. Should the class iterator (not const_iterator)
have `const' member functions? I think it shouldn't.

We could use the following srtucture for the iterators:

// bits/iter_base.h  <-- new file

template<typename _Tp>
class _Iterator_base : public iterator<random_access_iterator_tag, 
                                       _Tp, ptfrdiff_t, _Tp*, _Tp&>
{
// members
};

template<typename _Tp>
class _Iterator : public _Iterator_base<_Tp>
{
// members
};

template<typename _Tp>
class _Const_iterator : public _Iterator_base<_Tp>
{
// members
};


// bits/basic_string.h

template<class _CharT, class _Traits, class _Alloc>
class basic_string {
  public:
    class iterator : public _Iterator<_CharT> {
      friend class basic_string<_CharT, _Traits, _Alloc>;
      // Constructors  
    };

    class const_iterator : public _Const_iterator<_CharT> {
      // like above
    };
};


// stl/bits/stl_vector.h

template<class _Tp, class _Alloc>
class vector {
// iterators like in basic_string
};


Ryszard Kabatek
--
Martin-Luther University Halle-Wittenberg
Department of Physical Chemistry
Geusaer Str. 88, 06217 Merseburg, Germany
Tel. +49 3461 46 2487 Fax. +49 3461 46 2129