Re: in-out and out parameters

["Randy Brukardt" <randy@rrsoftware.com>]

"Hyman Rosen" <hyrosen@mail.com> wrote in message
news:1077805821.190885@master.nyc.kbcfp.com...
> Evangelista Sami wrote:
> > I thought that, as I and J were passed by references
>
> In Ada, out parameters may be passed using copy-in/copy-out
> rather than by reference in certain circumstances.

Which are all of them in this case (elementary types are *always* passed by
copy-in/copy-out). Ada has types that must always be passed by reference as
well. And there are some types where the compiler is allowed to choose - but
the compiler is likely to make the same choice for all parameter passing
modes (for instance, if the objects are large).

Thus, the choice between by-reference and by-copy depends mostly on the type
of the item passed; the parameter passing mode has little or no effect on
how items are passed.

              Randy.