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$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+)*)))

In reply to Re^3: grep question using multiple lines by Anonymous Monk
in thread grep question using multiple lines by bradcathey

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