Regexp.fromString

Stephen Weeks MLton@sourcelight.com
Thu, 14 Mar 2002 15:06:21 -0800


I am looking into extending Regexp.fromString to handle ^ and $, and I
have a couple of questions.

The "upper" function, used to implement range, appears broken to me.
Here is the definition.

	 fun upper (r, n: int) =
	    if n = 0
	       then null
	    else or [r, upper (r, n - 1)]

I would assume that you want upper (r, 3) to return

	null | r | rr | rrr

Also, is there any reason why you didn't just translate ^ as
AnchorStart?