`sig
val of_option : 'a option -> 'a list
val set_inter : 'a list -> 'a list -> 'a list
val set_diff : 'a list -> 'a list -> 'a list
val classify :
?equal:('b -> 'b -> bool) ->
f:('a -> 'b) -> 'a list -> ('b * 'a list) list
val enumerate_from : int -> 'a list -> ('a * int) list
val fold_left_term :
'a list ->
f:('b -> 'a -> [ `Continue of 'b | `Final of 'b ]) -> init:'b -> 'b
val map_accum :
'a list -> f:('b -> 'a -> 'b * 'c) -> init:'b -> 'b * 'c list
val max : ?cmp:('a -> 'a -> int) -> 'a list -> 'a option
val min : ?cmp:('a -> 'a -> int) -> 'a list -> 'a option
val max_exn : ?cmp:('a -> 'a -> int) -> 'a list -> 'a
val min_exn : ?cmp:('a -> 'a -> int) -> 'a list -> 'a
val lcs : 'a list -> 'a list -> 'a list
val number : 'a list -> ('a * int) list
val multimerge : 'a list list -> 'a list
val multimerge_unique : 'a list list -> 'a list
val square : ?null:'v -> ('k * 'v) list list -> 'k list * 'v list list
val square_unique :
?null:'v -> ('k * 'v) list list -> 'k list * 'v list list
val equal : equal:('a -> 'b -> bool) -> 'a list -> 'b list -> bool
val compare : ('a -> 'b -> int) -> 'a list -> 'b list -> int
end`