Regular Expressions 101

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An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression

/
/
gm

Test String

Code Generator

Generated Code

import Foundation let pattern = #"name\[(?<policy_name>[\w\.\-\d\s]+)\]uuid\[(?<uuid>[\w\d\.\-\s]+)\]srcintf\[(?<source_interface>[\w\.\-\s\d]+)\]dstintf\[(?<destination_interface>[\w\d\-\.\s]+)\]srcaddr\[(?<source_address>[\w\d\.\-\s]+)\]dstaddr\[(?<destination_address>[\w\d\.\-\s]+)\]action\[(?<policy_action>\w+)\]schedule\[(?<policy_schedule>[\w\d\s\.\-]+)\]service\[(?<policy_services>[\w\s\.\d\-]+)\](utm-status\[(?<utm_status>[\w\s\.\-\d]+)\])?logtraffic\[(?<log_traffic>[\d\w\s\.\-]+)\]ippool\[(?<pool_status>[\s\w\d\.\-]+)\]poolname\[(?<pool_name>[\w\s\d\.\-]+)\](profile-protocol-options\[(?<protocol_options>[\w\s\d\.\-]+)\]ssl-ssh-profile\[(?<ssl_ssh_profile>[\w\d\.\s\-]+)\]ips-sensor\[(?<ips_sensor>[\w\d\s\.\-]+)\])?nat\[(?<nat_status>[\w\d\s\.\-]+)\]"# let regex = try! NSRegularExpression(pattern: pattern, options: .anchorsMatchLines) let testString = #"name[BDC-OMNIChannel-Server-OUT]uuid[260b133c-6dfc-51eb-d0a5-eff41f9c9cea]srcintf[INT-To-CoreWAN TO-FG3700-DC-IC]dstintf[SERVICE-INT-OUTSIDE]srcaddr[Omni-Channel-Testbed]dstaddr[all]action[accept]schedule[always]service[DNS HTTP HTTPS PING]utm-status[enable]logtraffic[all]ippool[enable]poolname[INTERNET-SERVICES-OUTBOUND-POOL]profile-protocol-options[default]ssl-ssh-profile[certificate-inspection]ips-sensor[high_security]nat[enable]"# 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