Alist (p.travesty.0.5.1.doc.travesty.base_exts.Travesty_base

Sourcetype ('k, 'v) t = ('k, 'v) Base.List.Assoc.t

Defined to let this module be used directly in chaining operations etc.

Associative lists are bi-mappable; the left type is keys, and the right type is values. For example:

    bi_map [("foo", 27); ("bar", 53); ("baz", 99)]
      ~left:String.capitalize ~right:Int.neg
    (* returns: [("Foo", -27); ("Bar", -53); ("Baz", -99)] *)

include Travesty.Bi_mappable.S2 with type ('l, 'r) t := ('l, 'r) t

Type of containers.

include Base.T2 with type ('l, 'r) t := ('l, 'r) t

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

include Travesty.Bi_mappable.Basic_generic
  with type ('l, 'r) t := ('l, 'r) t
  with type 'l left := 'l
  with type 'r right := 'r

include Travesty.Types_intf.Bi_generic
  with type ('l, 'r) t := ('l, 'r) t
  with type 'l left := 'l
  with type 'r right := 'r

Source

val bi_map : 
  ('l1, 'r1) t ->
  left:('l1 -> 'l2) ->
  right:('r1 -> 'r2) ->
  ('l2, 'r2) t

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

Sourceval map_left : ('l1, 'r) t -> f:('l1 -> 'l2) -> ('l2, 'r) t

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

Sourceval map_right : ('l, 'r1) t -> f:('r1 -> 'r2) -> ('l, 'r2) t

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

Source

val compose : 
  ('a, 'b) t ->
  ('b, 'c) t ->
  equal:('b -> 'b -> bool) ->
  ('a, 'c) t

compose a b ~equal produces an associative list that returns (x, z) for each (x, y) in a such that a (y', z) exists in b, and equal y y' is true.