# Module StdLabels.List

    module List: sig .. end

    val length : 'a list -> int

    val hd : 'a list -> 'a

    val tl : 'a list -> 'a list

    val nth : 'a list -> int -> 'a

    val rev : 'a list -> 'a list

    val append : 'a list -> 'a list -> 'a list

    val rev_append : 'a list -> 'a list -> 'a list

    val concat : 'a list list -> 'a list

    val flatten : 'a list list -> 'a list

    val iter : f:('a -> unit) -> 'a list -> unit

    val map : f:('a -> 'b) -> 'a list -> 'b list

    val rev_map : f:('a -> 'b) -> 'a list -> 'b list

    val fold_left : f:('a -> 'b -> 'a) -> init:'a -> 'b list -> 'a

    val fold_right : f:('a -> 'b -> 'b) -> 'a list -> init:'b -> 'b

    val iter2 : f:('a -> 'b -> unit) -> 'a list -> 'b list -> unit

    val map2 : f:('a -> 'b -> 'c) -> 'a list -> 'b list -> 'c list

    val rev_map2 : f:('a -> 'b -> 'c) -> 'a list -> 'b list -> 'c list

    val fold_left2 : f:('a -> 'b -> 'c -> 'a) -> init:'a -> 'b list -> 'c list -> 'a

    val fold_right2 : f:('a -> 'b -> 'c -> 'c) -> 'a list -> 'b list -> init:'c -> 'c

    val for_all : f:('a -> bool) -> 'a list -> bool

    val exists : f:('a -> bool) -> 'a list -> bool

    val for_all2 : f:('a -> 'b -> bool) -> 'a list -> 'b list -> bool

    val exists2 : f:('a -> 'b -> bool) -> 'a list -> 'b list -> bool

    val mem : 'a -> set:'a list -> bool

    val memq : 'a -> set:'a list -> bool

    val find : f:('a -> bool) -> 'a list -> 'a

    val filter : f:('a -> bool) -> 'a list -> 'a list

    val find_all : f:('a -> bool) -> 'a list -> 'a list

    val partition : f:('a -> bool) -> 'a list -> 'a list * 'a list

    val assoc : 'a -> ('a * 'b) list -> 'b

    val assq : 'a -> ('a * 'b) list -> 'b

    val mem_assoc : 'a -> map:('a * 'b) list -> bool

    val mem_assq : 'a -> map:('a * 'b) list -> bool

    val remove_assoc : 'a -> ('a * 'b) list -> ('a * 'b) list

    val remove_assq : 'a -> ('a * 'b) list -> ('a * 'b) list

    val split : ('a * 'b) list -> 'a list * 'b list

    val combine : 'a list -> 'b list -> ('a * 'b) list

    val sort : cmp:('a -> 'a -> int) -> 'a list -> 'a list

    val stable_sort : cmp:('a -> 'a -> int) -> 'a list -> 'a list

    val fast_sort : cmp:('a -> 'a -> int) -> 'a list -> 'a list

    val merge : cmp:('a -> 'a -> int) -> 'a list -> 'a list -> 'a list