* http://helm.cs.unibo.it/
*)
+ (** begin of error offset (counted in unicode codepoint)
+ * end of error offset (counted as above)
+ * error message *)
exception Error of int * int * string
- (** lexer for concrete syntax patterns (notation level 1) *)
-val level1_lexer: (string * string) Token.glexer
-
- (** lexer for ast patterns (notation level 2) *)
-val level2_lexer: (string * string) Token.glexer
+val notation_lexer: (string * string) Token.glexer