[gmpi] Re: Plugin Factory Update

Tim Hockin wrote:

> You've changed some of the COM interfaces to take references now instead
> of pointers (specifically to GMPI_GUID). How does that play with COM?
> Does it magically become a pointer in C? The mix of pointers and refs is weird. Can we make it all consistent one way or another?

Hi Tim, here's Ron's reasoning:

[1] For in arguments, I like to use const references.  Pointers are
reserved for out.  That gives a very handy way of knowing, at the call
site, what might change and what might not.  So:

GMPI_Factory::CreateInstance( const GMPI_GUID& iid, ... )

Note that a reference is the same as a pointer in C, or at least that's
how they do it in COM.  They declare the interface as const GUID*, but
the impl can be const GUID&.

Best Regards,
Jeff


----------------------------------------------------------------------
Generalized Music Plugin Interface (GMPI) public discussion list
Participation in this list is contingent upon your abiding by the
following rules:  Please stay on topic.  You are responsible for your own
words.  Please respect your fellow subscribers.  Please do not
redistribute anyone else's words without their permission.

Archive: http://www.freelists.org/archives/gmpi
Email gmpi-request@xxxxxxxxxxxxx w/ subject "unsubscribe" to unsubscribe

Other related posts: