Policy for return by reference values in error cases

[Sebastian Huber]

On 23/03/2021 18:48, Joel Sherrill wrote:

> My first thought is that I don't like covering up for applications 
> that do the wrong thing.
This topic just came up recently in a discussion about defensive 
programming. We also test for NULL pointers.
>
> I'm overall rather ambiguous. It is possible that setting the value at 
> the top of the function could lead to overridden before used issues 
> with warnings and static analysis.

You mean code like this:

void (int *x, int y)

{

   *x = 0;

  if (y) {

    *x = 1;

} else {

  *x = 2;

}

?

> I don't want to see every error case assign a value to an output 
> parameter though.
Yes, I don't like this also.

-- 
embedded brains GmbH
Herr Sebastian HUBER
Dornierstr. 4
82178 Puchheim
Germany
email: sebastian.huber at embedded-brains.de
phone: +49-89-18 94 741 - 16
fax:   +49-89-18 94 741 - 08

Registergericht: Amtsgericht München
Registernummer: HRB 157899
Vertretungsberechtigte Geschäftsführer: Peter Rasmussen, Thomas Dörfler
Unsere Datenschutzerklärung finden Sie hier:
https://embedded-brains.de/datenschutzerklaerung/