__normal_iterator conversion bug

[Ryszard Kabatek]

const_cast removes the const attribute, 
so the (just modified) copy constructor (see below)
allows a conversion from const_iterator to iterator.
This is a wrong direction...


  // Allow iterator to const_iterator conversion
  template<typename _Iter>
  inline __normal_iterator(const __normal_iterator<_Iter, _Container>& __i)
    : _M_current(const_cast<_Iterator>(__i.base())) { }


# include <string>
int main()
{
  string::const_iterator I;
  string::iterator J(I);     // Does compile!
}


Ryszard Kabatek
Martin-Luther University Halle-Wittenberg, Department of Physical Chemistry
Geusaer Str. 88, 06217 Merseburg, Germany
Tel. +49 3461 46 2487 (2466) Fax. +49 3461 46 2129