PHWinfo - Afficher un message - Why use object pointers rather than objects?

15/10/2007, 20h31

krishna.kishore.0987@gmail.com wrote:
> Why are always object pointers used? (i.e., ObjectType *objPointer)
> what are the advantages of using object pointers Vs objects
> (ObjectType obj)

Polymorhpism and slicing.

> one advantage I see is passing them across methods, but is this purely
> presentation issue (use 'objPointer' rather than '&obj') or are there
> some performance affects?

Now you're talking about references instead of copied objects. The
advantage is that a reference parameter always refers to a valid object
(modulo UB in the caller, of course).

15/10/2007, 20h31	#2
red floyd Messages: n/a Hébergeur:	Re: Why use object pointers rather than objects? krishna.kishore.0987@gmail.com wrote: > Why are always object pointers used? (i.e., ObjectType *objPointer) > what are the advantages of using object pointers Vs objects > (ObjectType obj) Polymorhpism and slicing. > one advantage I see is passing them across methods, but is this purely > presentation issue (use 'objPointer' rather than '&obj') or are there > some performance affects? Now you're talking about references instead of copied objects. The advantage is that a reference parameter always refers to a valid object (modulo UB in the caller, of course).