Via_map_and_join.Req
type 'a t
The type held by the Monad_plus.
Monad_plus
include Preface_specs.Indexed_monad.WITH_RETURN with type ('a, 'index) t := 'a t
val return : 'a -> 'a t
Lift a value into a t.
t
include Preface_specs.Indexed_bind.WITH_MAP_AND_JOIN with type ('a, 'index) t := 'a t
val map : ('a -> 'b) -> 'a t -> 'b t
Mapping over from 'a to 'b.
'a
'b
val join : 'a t t -> 'a t
join remove one level of monadic structure, projecting its bound argument into the outer level.
join
val combine : 'a t -> 'a t -> 'a t
Combine two values of t into one.
val neutral : 'a t
The neutral element of the t.