"Walter" <walter@digitalmars.com> wrote in message news:ae0vvr$18iq$1@digitaldaemon.com...
> "OddesE" <OddesE_XYZ@hotmail.com> wrote in message news:ae0enc$nhq$1@digitaldaemon.com...
> > "Matthew Wilson" <mwilson@nextgengaming.com> wrote in message news:adm69r$1pt3$1@digitaldaemon.com...
> > > simply:
> > >
> > > - unique says there is no aliasing elsewhere (in the walkable tree of arguments in "this" function call) of the ptr so marked.
> > >
> > > - ref incorporates unique, and states that the ptr so marked cannot be
> > NULL
> > > (or rather that it will not be NULL - it's still possible to pass NULL
> in
> > > C/C++ of course)
> > >
> > > As I said, this is a simple explanation, but captures the most
> interesting
> > > features. If anyone wants to provide a fullsome explanation, be my
guest
> > ...
> > >
> > >
> > >
> > > "Walter" <walter@digitalmars.com> wrote in message news:adlhnj$166m$1@digitaldaemon.com...
> > > >
> > > > "OddesE" <OddesE_XYZ@hotmail.com> wrote in message news:acqivc$a3j$1@digitaldaemon.com...
> > > > > Walter is there still any need for IDL in D,
> > > > > or are all constructs supported by IDL also
> > > > > supported by D? What do you do with the
> > > > > unique and ref keywords for instance?
> > > >
> > > > I don't remember what those keywords do.
> > > >
> > > >
> > >
> > >
> >
> > Basically they aid COM in the decision for
> > marshaling code to use. Let's say you pass
> > a circular linked list. Since you cannot
> > pass pointers across boundaries you will
> > have to copy the block of memory each
> > pointer is pointing at. However you might
> > get in an infinite loop when passing a
> > circular linked list, so you have to check
> > each pointer to see if you already passed it
> > before. Using unique tells the IDL compiler
> > that every pointer will be unique, so the
> > extra checking code is not needed, making
> > the marshaling faster.
> >
> >
> > --
> > Stijn
> > OddesE_XYZ@hotmail.com
> > http://OddesE.cjb.net
> > _________________________________________________
> > Remove _XYZ from my address when replying by mail
> >
> >
> >
>

>
> Thanks for the illumination. D doesn't have something directly comparable.


And that makes perfect sense, COM is proprietary, D isn't. But just don't write off IDL yet... :)


--
Stijn
OddesE_XYZ@hotmail.com
http://OddesE.cjb.net
_________________________________________________
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