Re: Out parameters in a function

["Kent Paul Dolan" <xanthian@well.com>]

"Stephen Leake" <stephen.a.leake.1@gsfc.nasa.gov> wrote:

> In Forth, I can push several values on the stack, and then return
> from the word (it's _not_ a "function", it's a "word" :). In Ada, I
> can set several values in the return type, and then return. I don't
> see that the difference is significant. The syntax is different, but
> not the semantics.

Yes.  In Java, the Enumeration provides a similar facility for returning
a (possibly mixed, if they were hooked that way in the container from
which the Enumeration is derived) bag of objects which it will then
regurgitate one by one as requested; since they can be of Java's
essentially anonymous type "Object", it is up to the recipient or to an
agreement between producer and consumer to sort out what is what.

So, in comparision to Darren's model for Forth, in Java, you do "hook,
hook, hook, create Enumeration, return Enumeration, receive Enumeration,
unhook, unhook, unhook"; same result, different details.

xanthian.

Unfortunately it would _not_ support the C model of using the third
thing hooked as a boolean to a conditional before accessing the first
and second things hooked.  Strictly FIFO, so far as I can tell.  Thus it
wouldn't satisfy the original request.


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