[boost] boost::optional feature request.

From: Joe Gottman (jgottman_at_[hidden])
Date: 2003-03-24 20:37:34

   It would be nice if boost::optional<T> had operator< defined whenever
operator< was defined for T.   This would allow us to use optional<T> as the
key of  an associative container.  I suggest the following semantics:

bool operator<(optional<T> const &x, optional<T> const &y);

Returns: If y is uninitialized, false.  If  y is initialized and x is
uninitialized, true.  If x and y are both initialized, (*x < *y).

   This results in a strict weak ordering with uninitialized optional<T>
objects being sorted first.

Joe Gottman