Re: [boost] iterator adapter, little help please?

From: Neal Becker (ndbecker2_at_[hidden])
Date: 2005-09-01 21:16:45

I see I can get this to work by adding an ugly const_cast.  This seems to
confirm my suspicion, that the problem is caused by iterator_facade having      
template <class Facade>
      static typename Facade::reference dereference(Facade const& f)
      {
          return f.dereference();
      }

IIUC the problem is the const in the above.  To make my adaptor work, I did
this:
    scalar_type & dereference() const {
      return (cnt % 2 == 0) ?
const_cast<complex_type&>(*this->base_reference()).real() :
const_cast<complex_type&>(*this->base_reference()).imag();
    }

So, basically, my dereference() has to lie about being const.

Is this really correct?  Is there another way to make my dereference without
this ugly cast?