[NSWI004] Getting a pointer to the item with a link.

[Vojtech Horky]

Hello.

Dne 30. 09. 20 v 9:34 Georgii Ekserdzhian napsal(a):
> Good morning,
> I'm working on a %pL placeholder and I encountered some problems.
> So I get a pointer to a list. I turn it's pointer into a string, that's 
> fine.
> Now I need to get pointers to the items in that list.
> I need to iterate them first.
> That is done either by list_foreach() or I can do it just by jumping 
> pointers to links and getting a pointer to each item with list_item().
> Both list_foreach() and list_item() require a type of a payload and a 
> name of a link variable.
> In test cases it's a paw_t, but I suppose we need to make this work on 
> any structure.
> I'm not sure how to make this generic.

Your reasoning is completely correct.

For this special case, we expect that you will iterate through the 
prev/next pointers manually because there is no way how to pass 
information about the actual payload type into your printf.

For other cases, the list_foreach() is the right approach as you usually 
know the payload type.

Cheers,
- VH