diff -r 71b760618f30 -r 241838c01caf TFL/utils.sig
--- a/TFL/utils.sig	Tue May 20 11:47:33 1997 +0200
+++ b/TFL/utils.sig	Tue May 20 11:49:57 1997 +0200
@@ -4,50 +4,25 @@
   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