Same as Infix, except the monad type has three arguments. The second and third are compose across all computation.
type ('a, 'i, 'j) t
val (>>=) : ('a, 'i, 'j) t ‑> ('a ‑> ('b, 'j, 'k) t) ‑> ('b, 'i, 'k) t
val (>>|) : ('a, 'i, 'j) t ‑> ('a ‑> 'b) ‑> ('b, 'i, 'j) t