Re^2: grep question using multiple lines

[bradcathey]

Thanks, but like I so carefully pointed out, I'm not just looking for email addresses. I'm aware of all the parsing modules out there. This is just an exercise in grepping and looking for an academic answer.

[Anonymous Monk]

$Email::Address::addr_spec This regular expression defined what an email address is allowed to look like.

(?-xism:(?-xism:(?-xism:(?-xism:(?-xism:\s*\((?:\s*(?-xism:(?-xism:(?>
+[^()\\]+))|(?-xism:\\(?-xism:[^\x0A\x0D]))|(?-xism:\s*\((?:\s*(?-xism
+:(?-xism:(?>[^()\\]+))|(?-xism:\\(?-xism:[^\x0A\x0D]))|))*\s*\)\s*)))
+*\s*\)\s*)|\s+)*(?-xism:[^\x00-\x1F\x7F()<>\[\]:;@\\,."\s]+(?:\.[^\x0
+0-\x1F\x7F()<>\[\]:;@\\,."\s]+)*)(?-xism:(?-xism:\s*\((?:\s*(?-xism:(
+?-xism:(?>[^()\\]+))|(?-xism:\\(?-xism:[^\x0A\x0D]))|(?-xism:\s*\((?:
+\s*(?-xism:(?-xism:(?>[^()\\]+))|(?-xism:\\(?-xism:[^\x0A\x0D]))|))*\
+s*\)\s*)))*\s*\)\s*)|\s+)*)|(?-xism:(?-xism:(?-xism:\s*\((?:\s*(?-xis
+m:(?-xism:(?>[^()\\]+))|(?-xism:\\(?-xism:[^\x0A\x0D]))|(?-xism:\s*\(
+(?:\s*(?-xism:(?-xism:(?>[^()\\]+))|(?-xism:\\(?-xism:[^\x0A\x0D]))|)
+)*\s*\)\s*)))*\s*\)\s*)|\s+)*"(?-xism:(?-xism:[^\\"])|(?-xism:\\(?-xi
+sm:[^\x0A\x0D])))+"(?-xism:(?-xism:\s*\((?:\s*(?-xism:(?-xism:(?>[^()
+\\]+))|(?-xism:\\(?-xism:[^\x0A\x0D]))|(?-xism:\s*\((?:\s*(?-xism:(?-
+xism:(?>[^()\\]+))|(?-xism:\\(?-xism:[^\x0A\x0D]))|))*\s*\)\s*)))*\s*
+\)\s*)|\s+)*))\@(?-xism:(?-xism:(?-xism:(?-xism:\s*\((?:\s*(?-xism:(?
+-xism:(?>[^()\\]+))|(?-xism:\\(?-xism:[^\x0A\x0D]))|(?-xism:\s*\((?:\
+s*(?-xism:(?-xism:(?>[^()\\]+))|(?-xism:\\(?-xism:[^\x0A\x0D]))|))*\s
+*\)\s*)))*\s*\)\s*)|\s+)*(?-xism:[^\x00-\x1F\x7F()<>\[\]:;@\\,."\s]+(
+?:\.[^\x00-\x1F\x7F()<>\[\]:;@\\,."\s]+)*)(?-xism:(?-xism:\s*\((?:\s*
+(?-xism:(?-xism:(?>[^()\\]+))|(?-xism:\\(?-xism:[^\x0A\x0D]))|(?-xism
+:\s*\((?:\s*(?-xism:(?-xism:(?>[^()\\]+))|(?-xism:\\(?-xism:[^\x0A\x0
+D]))|))*\s*\)\s*)))*\s*\)\s*)|\s+)*)|(?-xism:(?-xism:(?-xism:\s*\((?:
+\s*(?-xism:(?-xism:(?>[^()\\]+))|(?-xism:\\(?-xism:[^\x0A\x0D]))|(?-x
+ism:\s*\((?:\s*(?-xism:(?-xism:(?>[^()\\]+))|(?-xism:\\(?-xism:[^\x0A
+\x0D]))|))*\s*\)\s*)))*\s*\)\s*)|\s+)*\[(?:\s*(?-xism:(?-xism:[^\[\]\
+\])|(?-xism:\\(?-xism:[^\x0A\x0D]))))*\s*\](?-xism:(?-xism:\s*\((?:\s
+*(?-xism:(?-xism:(?>[^()\\]+))|(?-xism:\\(?-xism:[^\x0A\x0D]))|(?-xis
+m:\s*\((?:\s*(?-xism:(?-xism:(?>[^()\\]+))|(?-xism:\\(?-xism:[^\x0A\x
+0D]))|))*\s*\)\s*)))*\s*\)\s*)|\s+)*)))