这是我们参加06年全国开源软件的竞赛作品

				(* parser-sig.sml				 *				 * COPYRIGHT (c) 1995 AT&T Bell Laboratories.				 *)								signature REGEXP_PARSER =				  sig								    val scan : (char, 'a) StringCvt.reader					          -> (RegExpSyntax.syntax, 'a) StringCvt.reader					(* read an external representation of a regular expression					 * from the stream and return an abstract syntax representation					 *)								  end