package travesty

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S0 is the full signature of an arity-0 bi-traversable type.

Functions traversing over arity-0 types must preserve both element types.

include Generic_types.Bi0
type t

Fixed type of containers.

type left

Fixed type of left elements.

type right

Fixed type of right elements.

include Generic with type ('l, 'r) t := t and type 'l left := left and type 'r right := right
include Generic_types.Bi_generic with type ('l, 'r) t := t with type 'l left := left with type 'r right := right

We can do non-monadic bi-mapping operations.

include Bi_mappable_types.Generic with type ('l, 'r) t := t and type 'l left := left and type 'r right := right
include Bi_mappable_types.Basic_generic with type ('l, 'r) t := t with type 'l left := left with type 'r right := right
include Generic_types.Bi_generic with type ('l, 'r) t := t with type 'l left := left with type 'r right := right
val bi_map : t -> left:(left -> left) -> right:(right -> right) -> t

bi_map c ~left ~right maps left over every 'l1 left, and right over every 'r1 right, in c.

val map_left : t -> f:(left -> left) -> t

map_left c ~f maps f over the left type of c only.

val map_right : t -> f:(right -> right) -> t

map_right c ~f maps f over the right type of c only.

module On (M : Base.Applicative.S) : Generic_on_applicative with type ('l, 'r) t := t and type 'l left := left and type 'r right := right and module M := M

On implements bi-traversal operators for a given applicative functor M.

module On_monad (M : Base.Monad.S) : Generic_on_applicative with type ('l, 'r) t := t and type 'l left := left and type 'r right := right and module M := Monad_exts.App(M)

On_monad implements bi-traversal operators for a given monad M.

module With_errors : Generic_on_applicative with type ('l, 'r) t := t and type 'l left := left and type 'r right := right and module M := Base.Or_error

With_errors specialises On_monad to the error_monad.