i previously had a bad habit of using double underscores in include
guard macro names, which are implementation-reserved per
the C++98 standard (see 17.4.3.1.2 Global names).
Co-authored-by: Pheenoh <pheenoh@gmail.com>
* f_op_actor_tag OK
* f_pc_layer_tag OK
* f_pc_layer_iter
* forgot a return
* identation and extern var name comments
* fix struct member name
Co-authored-by: Pheenoh <pheenoh@gmail.com>