Policy for return by reference values in error cases

Sebastian Huber sebastian.huber at embedded-brains.de
Tue Mar 23 17:58:20 UTC 2021

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.

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