--- a/TFL/utils.sml Tue Sep 05 18:53:21 2000 +0200
+++ b/TFL/utils.sml Tue Sep 05 18:53:42 2000 +0200
@@ -1,11 +1,31 @@
-(* Title: TFL/utils
+(* Title: TFL/utils.sml
ID: $Id$
Author: Konrad Slind, Cambridge University Computer Laboratory
Copyright 1997 University of Cambridge
-Basic utilities
+Basic utilities.
*)
+signature Utils_sig =
+sig
+ exception ERR of {module:string,func:string, mesg:string}
+
+ val can : ('a -> 'b) -> 'a -> bool
+ val holds : ('a -> bool) -> 'a -> bool
+ val C : ('a -> 'b -> 'c) -> 'b -> 'a -> 'c
+
+ 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 pluck : ('a -> bool) -> 'a list -> 'a * 'a list
+ val zip3 : 'a list -> 'b list -> 'c list -> ('a*'b*'c) list
+ val take : ('a -> 'b) -> int * 'a list -> 'b list
+ val sort : ('a -> 'a -> bool) -> 'a list -> 'a list
+
+end;
+
+
structure Utils =
struct