Re: overload ":=" ???

[dewar@cs.nyu.edu (Robert Dewar)]

John Herro, answering a question from David said

  ">Is there a way to overload the assignment operator ":=" ?
     Unfortunately, no.  However, you can write your own procedure Assign
  or Set.  The difficulty with that is that you may forget to call it, and
  use the predefined := instead.
     The workaround is to make the type of the object you're assigning
  limited private.  Then the compiler will force you to call your Set
  procedure, and won't allow you accidentally to use := (outside the
  package)."

This seems the wrong advice. In Ada 95, nearly all cases where you want
to redefine assignment can be nicely handled by using non-limited controlled
types and redefining Adjust appropriately. I am not clear as to why John
omitted this most obvious response. Perhaps he was answering in the
framework of Ada 83 (where controlled types are not available).