I recently came along this line of code:

CustomData_em_free_block(&em->vdata, &eve->data);

And I thought, isn't:

a->b

just syntactic sugar for:

(*a).b

With that in mind, this line could be re-written as:

CustomData_em_free_block(&(*em).vdata, &(*eve).data);

If that's the case, what is the point of passing in

&(*a), as a parameter, and not just a? It seems like the pointer equivalent of -(-a) is being passed in in, is there any logic for this?

Thank you.