On: Tell HN: C Experts Panel – Ask us anything about C

[DougGwyn]

Why is there a second argument which is not used?

[tropo → DougGwyn]

It could be for function pointer type compatibility.

There is an array of pointers, or there is a callback interface, or something like that. The type is set in stone.

[wnoise → DougGwyn]

To match an API where it is sometimes used.