OPERATION (preface.Preface_specs.Indexed

type ('a, 'index) t

The type held by the Indexed Comonad.

val lift : ('a -> 'b) -> ('a, 'index) t -> ('b, 'index) t

Mapping over t from 'a to 'b.

val lift2 : 
  ('a -> 'b -> 'c) ->
  ('a, 'index) t ->
  ('b, 'index) t ->
  ('c, 'index) t

Lift a binary function that acts on arbitrary values into a function that acts t values.

val lift3 : 
  ('a -> 'b -> 'c -> 'd) ->
  ('a, 'index) t ->
  ('b, 'index) t ->
  ('c, 'index) t ->
  ('d, 'index) t

Lift a ternary function that acts on arbitrary values into a function that acts t values.

val compose_right_to_left : 
  (('b, 'index) t -> 'c) ->
  (('a, 'index) t -> 'b) ->
  ('a, 'index) t ->
  'c

Composing co-monadic functions using Co-Kleisli Arrow (from right to left).

val replace : 'a -> ('b, 'index) t -> ('a, 'index) t

Create a new t, replacing all values of the given functor by given a value of 'a.

val void : ('a, 'index) t -> (unit, 'index) t

Create a new t, replacing all values in the given functor by unit.