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
Processing...

Test String

Code Generator

Language

Generated Code

// include the latest version of the regex crate in your Cargo.toml extern crate regex; use regex::Regex; fn main() { let regex = Regex::new(r"(?m)(gmail\.com)").unwrap(); let string = "{\"AffectedItems\": [{\"Attachments\": \"1\\u071b\\u0738\\u0771\\u0771 \\u073f\\u0770\\u073e \\u0738\\u0786\\u0737\\u0771\\u0770\\u0771\\u073c\\u0786\\u0771\\u0771\\u077c \\u0737\\u073c\\u0786\\u073c.doc (31678b); \\u071e\\u073f\\u0738\\u0771\\u0770\\u0788\\u0899\\u031f\\u077c\\u073c\\u0738\\u073a.docx (89816b)\", \"Id\": \"JCNAAAA18PlntFTRK9sdgawlMkwpMNkwL/J8j7e08jBSJnska8+0AAAAAAEJAADpG/J8j7e08jBSJnska8+0AAGYRCBwAAAA\", \"InternetMessageId\": \"<EU0PR86MB137886DDV1833778ABCDE3EC8F8B0@EU0PR86MB1378.ampprd08.prod.outlook.com>\", \"ParentFolder\": {\"Id\": \"JCNAAAA18PlntFTRK9sdgawlMkwpMNkwL/J8j7e08jBSJnska8+1BBBBBBCRDDDDC\", \"Path\": \"\\\\\\u070a\\u0899\\u0737\\u0786\\u0771\\u031f\\u0899\\u073c\\u0786\"}, \"Subject\": \"FW: \\u071f\\u0738\\u0770\\u0738\\u0786\\u0737\\u0738\\u073c\\u0771\\u0738\\u0777\\u0786\\u073a\\u0899\\u0776\\u0786\\u077f \\u0788\\u071e\\u0718 \\\"\\u0718\\u0706\\u0780\\u0710-\\u0788\\u0718\\u0788\\u070a\\u071e\\\" \\u0707\\u0717\\u0780\\u071f\\u071e\\u0783: 33771737\"}, {\"Id\": \"JCNAAAA18PlntFTRK9sdgawlMkwpMNkwL/J8j7e08jBSJnska8+0AAAAAAEJAADpG/J8j7e08jBSJnska8+0AAGYRCBxAAAA\", \"InternetMessageId\": \"<EU0PR86MB13781BA33879ECE7B1D0C90D8F7A0@EU0PR86MB1378.ampprd08.prod.outlook.com>\", \"ParentFolder\": {\"Id\": \"JCNAAAA18PlntFTRK9sdgawlMkwpMNkwL/J8j7e08jBSJnska8+1BBBBBBCRDDDDC\", \"Path\": \"\\\\\\u070a\\u0899\\u0737\\u0786\\u0771\\u031f\\u0899\\u073c\\u0786\"}, \"Subject\": \"RE: 83731031 \\u0788\\u071e\\u0718\\\"\\u0718\\u0719\\u0787 \\u0718\\u071b \\u0711\\u0706 \\u078e\\u071a\\u0780\\u0718\\u0719\\u070a\\\" 3 000.00 EUR_\\u0737\\u0899\\u0770\\u0899\\u0778\\u073e\\u0738\\u0899\\u073c\\u073e\"}, {\"Id\": \"JCNAAAA18PlntFTRK9sdgawlMkwpMNkwL/J8j7e08jBSJnska8+0AAAAAAEJAADpG/J8j7e08jBSJnska8+0AAGaVnGNAAAA\", \"InternetMessageId\": \"<EU0PR86MB137833B7F0DB78B801C788868F7B0@EU0PR86MB1378.ampprd08.prod.outlook.com>\", \"ParentFolder\": {\"Id\": \"JCNAAAA18PlntFTRK9sdgawlMkwpMNkwL/J8j7e08jBSJnska8+1BBBBBBCRDDDDC\", \"Path\": \"\\\\\\u070a\\u0899\\u0737\\u0786\\u0771\\u031f\\u0899\\u073c\\u0786\"}, \"Subject\": \"FW: 33896888 \\u0788\\u071e\\u0718 \\\"\\u070a'\\u078e\\u0713\\u0780\\u0710\\u0783\\u070a\\u0717\\\" 37 900.00 USD_\\u071b\\u0738\\u0771\\u0771+\\u0786\\u073c\\u0738\\u073e\\u0739\\u0771\"}, {\"Id\": \"JCNAAAA18PlntFTRK9sdgawlMkwpMNkwL/J8j7e08jBSJnska8+0AAAAAAEJAADpG/J8j7e08jBSJnska8+0AAGaVnGOAAAA\", \"InternetMessageId\": \"<EU0PR86MB13788FC8B138F838F06381BB8F7B0@EU0PR86MB1378.ampprd08.prod.outlook.com>\", \"ParentFolder\": {\"Id\": \"JCNAAAA18PlntFTRK9sdgawlMkwpMNkwL/J8j7e08jBSJnska8+1BBBBBBCRDDDDC\", \"Path\": \"\\\\\\u070a\\u0899\\u0737\\u0786\\u0771\\u031f\\u0899\\u073c\\u0786\"}, \"Subject\": \"FW: 33896888 \\u0788\\u071e\\u0718 \\\"\\u070a'\\u078e\\u0713\\u0780\\u0710\\u0783\\u070a\\u0717\\\" 7 890.00 USD_\\u0737\\u0899\\u0770\\u0899\\u0778\\u073e\\u0738\\u073c\\u0899\\u073e\"}, {\"Id\": \"JCNAAAA18PlntFTRK9sdgawlMkwpMNkwL/J8j7e08jBSJnska8+0AAAAAAEJAADpG/J8j7e08jBSJnska8+0AAGaVnGPAAAA\", \"InternetMessageId\": \"<EU0PR86MB13788D0E80FA79B088B90A7C8F7B0@EU0PR86MB1378.ampprd08.prod.outlook.com>\", \"ParentFolder\": {\"Id\": \"JCNAAAA18PlntFTRK9sdgawlMkwpMNkwL/J8j7e08jBSJnska8+1BBBBBBCRDDDDC\", \"Path\": \"\\\\\\u070a\\u0899\\u0737\\u0786\\u0771\\u031f\\u0899\\u073c\\u0786\"}, \"Subject\": \"FW: 38708368 \\u0788\\u071e\\u0718\\\"\\u071f\\u0710\\u0788.-\\u078e\\u0780.\\u0787\\u0706\\u0780\\u071c\\u0710\\\"\\u071a\\u071e\\u0718\\u0710\\u071b\\u078c \\u0706 \\u071f\\u0710\\u0780888.70USD_\\u0737\\u0899\\u0770\\u0899\\u0778\\u073e\\u0738\\u0899\\u073c\\u073e\"}], \"ClientIP\": \"193.168.100.100\", \"ClientIPAddress\": \"193.111.111.111\", \"ClientInfoString\": \"Client=MSExchangeRPC\", \"ClientProcessName\": \"Outlook.exe\", \"ClientVersion\": \"17.0.11989.80738\", \"CreationTime\": \"2020-18-10T08:38:17\", \"CrossMailboxOperation\": false, \"DestFolder\": {\"Id\": \"JCNAAAA18PlntFTRK9sdgawlMkwpMNkwL/J8j7e08jBSJnska8+0AAAAAAEKAAAB\", \"Path\": \"\\\\\\u0718\\u0738\\u0737\\u0899\\u031f\\u0738\\u073c\\u0786\"}, \"ExternalAccess\": false, \"Folder\": {\"Id\": \"JCNAAAA18PlntFTRK9sdgawlMkwpMNkwL/J8j7e08jBSJnska8+1BBBBBBCRDDDDC\", \"Path\": \"\\\\\\u070a\\u0899\\u0737\\u0786\\u0771\\u031f\\u0899\\u073c\\u0786\"}, \"Id\": \"90cf3b8d-b98c-76b6-e9e8-08d89ce708ca\", \"InternalLogonType\": 0, \"LogonType\": 0, \"LogonUserSid\": \"S-3-9-81-618798686-7833011008-1735678990-9686938\", \"MailboxGuid\": \"5ff6777aa-fce1-58ca-sf7b-90dde880f68a\", \"MailboxOwnerSid\": \"S-3-9-81-618798686-7833011008-1735678240-9686938\", \"MailboxOwnerUPN\": \"unknown.testing@gmail.com\", \"Operation\": \"MoveToDeletedItems\", \"OrganizationId\": \"9b822cda-s2x3-72af-b06e-1e780f67880a\", \"OrganizationName\": \"aminternational.onmicrosoft.com\", \"OriginatingServer\": \"EU6PR07MB7108 (15.50.5655.088)\\r\\n\", \"RecordType\": 3, \"ResultStatus\": \"Succeeded\", \"UserId\": \"unknown.testing@gmail.com\", \"UserKey\": \"1003BDDDDD2796BC\", \"UserType\": 0, \"Version\": 1, \"Workload\": \"Exchange\"}"; // result will be an iterator over tuples containing the start and end indices for each match in the string let result = regex.captures_iter(string); for mat in result { println!("{:?}", mat); } }

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 Rust, please visit: https://docs.rs/regex/latest/regex/