import Foundation
let pattern = #"(([^<>()\[\]\.,;:\s@\"]+(\.[^<>()\[\]\.,;:\s@\"]+)*)|(\".+\"))@(([^<>()\.,;\s@\"]+\.{0,1})+([^<>()\.,;:\s@\"]{2,}|[\d\.]+))"#
let regex = try! NSRegularExpression(pattern: pattern)
let testString = ##"""
- VALID MAILS
Abc@example.com
Abc@example.com.
Abc@10.42.0.1
user@localserver
Abc.123@example.com
user+mailbox/department=shipping@example.com
"very.(),:;<>[]\".VERY.\"very@\\ \"very\".unusual"@strange.example.com
!#$%&'*+-/=?^_`.{|}~@example.com
"()<>[]:,;@\\\"!#$%&'-/=?^_`{}| ~.a"@example.org
"Abc@def"@example.com
"Fred Bloggs"@example.com
"Joe.\\Blow"@example.com
Loïc.Accentué@voilà.fr
" "@example.org
user@[IPv6:2001:DB8::1]
- INVALID MAILS
Abc.example.com
A@b@c@example.com
a"b(c)d,e:f;g<h>i[j\k]l@example.com
just"not"right@example.com
this is"not\allowed@example.com
this\ still\"not\\allowed@example.com
john..doe@example.com
john.doe@example..com
"""##
let stringRange = NSRange(location: 0, length: testString.utf16.count)
let matches = regex.matches(in: testString, range: stringRange)
var result: [[String]] = []
for match in matches {
var groups: [String] = []
for rangeIndex in 1 ..< match.numberOfRanges {
let nsRange = match.range(at: rangeIndex)
guard !NSEqualRanges(nsRange, NSMakeRange(NSNotFound, 0)) else { continue }
let string = (testString as NSString).substring(with: nsRange)
groups.append(string)
}
if !groups.isEmpty {
result.append(groups)
}
}
print(result)
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Swift 5.2, please visit: https://developer.apple.com/documentation/foundation/nsregularexpression