signature Utils_sig =
sig
(* General error format and reporting mechanism *)
exception ERR of {module:string,func:string, mesg:string}
val Raise : exn -> 'a
(* infix 3 ## *)
val ## : ('a -> 'b) * ('c -> 'd) -> 'a * 'c -> 'b * 'd
val can : ('a -> 'b) -> 'a -> bool
val holds : ('a -> bool) -> 'a -> bool
val assert: ('a -> bool) -> 'a -> 'a
val W : ('a -> 'a -> 'b) -> 'a -> 'b
val C : ('a -> 'b -> 'c) -> 'b -> 'a -> 'c
val I : 'a -> 'a
val curry : ('a * 'b -> 'c) -> 'a -> 'b -> 'c
val uncurry : ('a -> 'b -> 'c) -> 'a * 'b -> 'c
val fst : 'a * 'b -> 'a
val snd : 'a * 'b -> 'b
(* option type *)
datatype 'a option = SOME of 'a | NONE
(* Set operations *)
val mem : ('a -> 'a -> bool) -> 'a -> 'a list -> bool
val union : ('a -> 'a -> bool) -> 'a list -> 'a list -> 'a list
val Union : ('a -> 'a -> bool) -> 'a list list -> 'a list
val intersect : ('a -> 'a -> bool) -> 'a list -> 'a list -> 'a list
val set_diff : ('a -> 'b -> bool) -> 'a list -> 'b list -> 'a list
val mk_set : ('a -> 'a -> bool) -> 'a list -> 'a list
val set_eq : ('a -> 'a -> bool) -> 'a list -> 'a list -> bool
val map2 : ('a -> 'b -> 'c) -> 'a list -> 'b list -> 'c list
val itlist : ('a -> 'b -> 'b) -> 'a list -> 'b -> 'b
val rev_itlist : ('a -> 'b -> 'b) -> 'a list -> 'b -> 'b
val end_itlist : ('a -> 'a -> 'a) -> 'a list -> 'a
val itlist2 :('a -> 'b -> 'c -> 'c) -> 'a list -> 'b list -> 'c -> 'c
val filter : ('a -> bool) -> 'a list -> 'a list
val mapfilter : ('a -> 'b) -> 'a list -> 'b list
val pluck : ('a -> bool) -> 'a list -> 'a * 'a list
val assoc1 : ('a*'a->bool) -> 'a -> ('a * 'b) list -> ('a * 'b) option
val front_back : 'a list -> 'a list * 'a
val all : ('a -> bool) -> 'a list -> bool
val exists : ('a -> bool) -> 'a list -> bool
val zip : 'a list -> 'b list -> ('a*'b) list
val zip3 : 'a list -> 'b list -> 'c list -> ('a*'b*'c) list
val unzip : ('a*'b) list -> ('a list * 'b list)
val take : ('a -> 'b) -> int * 'a list -> 'b list
val sort : ('a -> 'a -> bool) -> 'a list -> 'a list
val int_to_string : int -> string
val concat : string -> string -> string
val quote : string -> string
end;