On 2016-09-28 08:38, David Emerson wrote:
> I'm testing out CORBA interfaces before changing all my code to use them
> (I would prefer not to have managed types for interfaces).
I've been using CORBA style interfaces for years, and it was always
worked well for me. I must add, I never use the is/as syntax though (for
COM or CORBA style interfaces). I always use Supports(..) as in:
var
h: i_hello;
begin
// fellow is the class instance variable.
if Supports(fellow, i_hello, h) then
h.hello;
The Supports(..) syntax just seems more logical to me than the is/as
syntax. The latter assumes the object "is" an instance of one of the
interfaces and simply typecasts it to a interface variable. The
Supports(..) syntax queries the object instance and asks if it supports
a specific interface.
Regards,
Graeme
--
fpGUI Toolkit - a cross-platform GUI toolkit using Free Pascal
http://fpgui.sourceforge.net/
My public PGP key: http://tinyurl.com/graeme-pgp
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