Re: Out parameters in a function

[Jim Rogers <jimmaureenrogers@worldnet.att.net>]

Kent Paul Dolan wrote:

> "John McCabe" <john.mccabe@emrad.ns.com> wrote:
> 
>  > type of thing, but I can't remember off-hand how you would use a
>  > returned status with multiple return values!
> 
> Well, if I'm not inventing capabilities, in C the syntax is fairly
> direct (and forgive that with several dozen languages mixed in my head I
> cannot write any one correctly without manual in lap, which I don't have
> these days):
> 
> if
> (
>   (
>     aSomestructTypedVariable =
>       aSomestructReturningFunction
>       (
>         lots,
>         of,
>         parms
>       )
>   ).booleanPart
> )
> {
>   usefulVal = aSomestructTypedVariable.usefulPart;
> }
> 
> Does Ada support a similar "assignment en passant" mechanism?
> 
> xanthian.
> 
> (Does C return structures, for that matter?)


Well, almost. C does not have a boolean type. C (since its first
ANSI standard) does support returning structures. It could always
return a pointer to a structure.

Ada does not have the same sense of expressions as C.
Specifically, an assignment operator in Ada does not return a value.

Jim Rogers