(** Spin *)

(* Electron spin *)


(** Type *)
type t = Alfa | Beta

(** Note :
   ~Alfa~ if written with an 'f' instead of 'ph' because it has the same
   number of letters as ~Beta~, so the alignment of the code is nicer.
 *)


(** Functions *)

val other : t -> t
(** Returns the opposite spin. *)


(** Printers *)

val pp : Format.formatter -> t -> unit