* error message *)
exception Error of int * int * string
- (** lexer for concrete syntax patterns (notation level 1) *)
-val syntax_pattern_lexer: (string * string) Token.glexer
+ (** XXX ZACK DEFCON 4 BEGIN: never use the tok_func field of the glexers below
+ * passing values of type char Stream.t, they should be in fact Ulexing.lexbuf
+ * casted with Obj.magic :-/ Read the comment in the .ml for the rationale *)
- (** lexer for ast patterns (notation level 2) *)
-val ast_pattern_lexer: (string * string) Token.glexer
+val level1_pattern_lexer: (string * string) Token.glexer
+val level2_ast_lexer: (string * string) Token.glexer
+val level2_meta_lexer: (string * string) Token.glexer
+
+ (** XXX ZACK DEFCON 4 END *)
+
+val add_level2_ast_keyword: string -> unit (** non idempotent *)
+val remove_level2_ast_keyword: string -> unit (** non idempotent *)
+
+(* val lookup_ligatures: string -> string list *)