Pascal Costanza wrote: > Matthias Blume wrote: > > Pascal Costanza <[EMAIL PROTECTED]> writes: > >> (slot-value p 'address) is an attempt to access the field 'address in > >> the object p. In many languages, the notation for this is p.address. > >> > >> Although the class definition for person doesn't mention the field > >> address, the call to (eval (read)) allows the user to change the > >> definition of the class person and update its existing > >> instances. Therefore at runtime, the call to (slot-value p 'adress) > >> has a chance to succeed. > > > > I am quite comfortable with the thought that this sort of evil would > > get rejected by a statically typed language. :-) > > This sort of feature is clearly not meant for you. ;-P
To be fair though that kind of thing would only really be used while debugging a program. Its no different than adding a new member to a class while in the debugger. There are other places where you might add a slot to an object at runtime, but they would be done in tidier ways. -- http://mail.python.org/mailman/listinfo/python-list
