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<  Erlang patches mailing list  ~  regexp: how to match a null string?
cpressey at catseye.mb.ca
Posted: Fri Mar 28, 2003 6:16 am Reply with quote
Guest
On Thu, 27 Mar 2003 18:54:53 -0600
Chris Pressey <cpressey_at_catseye.mb.ca> wrote:

> In my mind, "^(.*)$" should match a null string.
> It doesn't match any characters, but it's still a valid match.
> But because regexp deals only in terms of characters matched -
> there's no way to tell!

In lieu of a better solution... attached is a patch to regexp.erl which
adds the function

is_match(String, RegExp) -> true | false | {error, Reason}

-Chris



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