links 0.9.8 · OCaml Package

type t =

| ConcreteLens of Sort.t
(*
A statically fully checked lens.
*)
| AbstractLens of {
1. checked : bool;
2. sort : Sort.t;
}
(*
The type of a lens where not all checks have been performed. The predicate value is a dummy value (None) and not the actual predicate.
*)

val pp : 
  Ppx_deriving_runtime.Format.formatter ->
  t ->
  Ppx_deriving_runtime.unit

val show : t -> Ppx_deriving_runtime.string

val sort : t -> Sort.t

Get the sort of the lens.

val equal : t -> t -> bool

val type_lens_fun_dep : 
  fds:(string list * string list) list ->
  columns:Column.List.t ->
  (t, Sort.Lens_sort_error.t) result

val set_serial : t -> columns:Alias.Set.t -> t

Change the specified columns to be of serial type.

module Select_lens_error : sig ... end

val type_select_lens : 
  t ->
  predicate:('a * 'a Links_lens__.Phrase_sugar.t) ->
  (t, 'a Select_lens_error.t) result

val type_select_lens_dynamic : t -> (t, 'a Select_lens_error.t) result

module Drop_lens_error : sig ... end

val type_drop_lens : 
  t ->
  drop:Alias.t list ->
  default:Links_lens__.Phrase_type.t list ->
  key:Alias.Set.t ->
  (t, Drop_lens_error.t) result

module Join_lens_error : sig ... end

val type_join_lens : 
  t ->
  t ->
  on:(string * string * string) list ->
  del_left:('a * 'a Links_lens__.Phrase_sugar.t) ->
  del_right:('a * 'a Links_lens__.Phrase_sugar.t) ->
  (t, 'a Join_lens_error.t) result

val record_type : t -> Links_lens__.Phrase_type.t

module Unchecked_lens_error : sig ... end

val is_abstract : t -> bool

Returns true if the lens is an abstract lens.

val is_checked : t -> bool

Returns true if an abstract lens has been checked or the lens is a concrete lens.

val ensure_checked : t -> (unit, Unchecked_lens_error.t) result

Ensures that an abstract lens type has explicitly been checked.

val make_checked : t -> t

Set an abstract lens as explicitly checked.

package links