#include <iterator>
#include <boost/iterator_adaptors.hpp>

using namespace boost;

struct dummy_input_iterator 
{
    typedef std::input_iterator_tag iterator_category;
	typedef char value_type;
	typedef size_t difference_type;
	typedef char * pointer;
	typedef char & reference;
	
	value_type operator*() const { return 42; }
	dummy_input_iterator & operator++() { return *this; }
	dummy_input_iterator operator++(int) { return *this; }
};

typedef iterator_adaptor<
        dummy_input_iterator, default_iterator_policies,
        char, char &, char *
    > adapted_dummy_iterator;
    
void main()
{
adapted_dummy_iterator it, end;
char c;

    while (it != end) {
        c = *it;
        ++it;
    }
}