From: Daniel Carrera <dcarrera@...>
Date: 2003-01-27T05:53:51+09:00
Subject: Re: common regular expressions

On Mon, Jan 27, 2003 at 05:41:17AM +0900, Sam Roberts wrote:

> How about we take:
> 
>   "hi y@"."ruby \",master!"   ( ... a comment!!)  @ u%me . u+me . u-me
> 
> its syntactically valid, too! Though admittedly unusual...

I only meant to write an "approximate" RE that would work most of the 
time.  Writing a truly comprehensive RE would be very difficult and 
probably not even worth it.

For instance, did you know that the backspace character is technically 
allowed?  Your address could be:

  <backspace>@domain.com

But who's really going to have a backspace in their email address? (good 
luck getting any email there).
It's better to just ignore this possibility.

Cheers,

-- 
Daniel Carrera
Graduate Teaching Assistant.  Math Dept.
University of Maryland.  (301) 405-5137