Re: How To Check if an object is created (instantiated)?

Danny Strümpel wrote:

> Rudy Velthuis schrieb:
> > Danny Strümpel wrote:
> > 
> > > To check for instantiation use "if Assigned(R) then ..."
> > 
> > No, don't. It is useless. If the variable is local, it most likely
> > isn't nil, and Assigned() ONLY checks for nil, nothing more.
> 
> I assumed correct assignment of the referenced object, either to nil
> or to a valid pointer. If you're passing invalid pointers, how would
> you check their validity?

ISTM that that is exactly what the OP wants to test: if a pointer
passed in is initialized or not. If it is nil, it was obviously
initialized, either by the RTL or by the "user". But if it is not nil,
you don't know if it was. IOW, you can't test that.
-- 
Rudy Velthuis        http://rvelthuis.de

"Man has no right to kill his brother. It is no excuse that he
 does so in uniform: he only adds the infamy of servitude to
 the crime of murder." -- Percy Bysshe Shelley