equal_pointees and invalid pointers

[NN]

In file boost/utility/compare_pointees.hpp function equal_pointees treat invalid pointers as a positive value.

There should be added another function which treats invalid pointers as a negative value.

template<class OptionalPointee>
inline
bool equal_pointees ( OptionalPointee const& x, OptionalPointee const& y )
{
  return (!x) != (!y) ? false : ( !x ? true : (*x) == (*y) ) ;
}

template<class OptionalPointee>
inline
bool equal_pointees_false ( OptionalPointee const& x, OptionalPointee const& y )
{
  return (!x) != (!y) ? false : ( !x ? false : (*x) == (*y) ) ;
}

Thanx.

[Steven Watanabe]

I don't understand what you mean by negative and positive. equal_pointees returns true if both pointers are null or if both pointers are non-null and their targets are equal.