Parameter Over_monad.Req

type ('a, 'index) t = ('a, 'index) Monad.t

The type held by the Indexed Monad Plus.

val combine : ('a, 'index) t -> ('a, 'index) t -> ('a, 'index) t

Combine two values of t into one.

val neutral : ('a, 'index) t

The neutral element of the t.