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
No Match

/
/
gm

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)(?<=\n)[A-Za-z ]{4,44}\s(\d{3}|\d{1}\w{2})").unwrap(); let string = "ROBERTO S.R.L. Automotive Aftermarket Roberto S.R.L., Str. Horia Macelariu nr. 30-34, RO-013937 Bucuresti Capitalul Social: 169.363.000 Lei, Nr. Ord. Reg. com.: J40/7601/1994 Citibank Europe Plc Dublin, Romania Branch Citibank Europe Plc Dublin, Bulgaria Branch SWIFT CODE: CITIROBU SWIFT CODE: CITIBGSF IBAN RON: RO45 CITI 0000 0007 2488 3001 IBAN BGN: BG54 CITI 9250 1001 0086 00 IBAN EURO: RO48 CITI 0000 0007 2488 3044 Invoice 1/ 2 Document No.: 2045175575 Date: 09.01.2023 Sold To party: 22222222 Account No.: 22222222 ALFREDO GIOACCHINO OOD ul. Andrey Germanov 11 BG-1336 MILANO Your VAT No.: BG175423111 Our VAT No.: RO5541546 Contact Person Finance: VALENTINA IVANOVA Phone: +35929601062 E-mail: Valentina.Ivanova@bg.rocco.com Contacts: DIANA DOBREVA Phone: 878668802 E-mail: external.Diana.Dobreva@bg.rocco.com Sold To Address: ALFREDO GIOACCHINO OOD, ul. Andrey Germanov 11, BG-1336 MILANO, B Item Material/Description Quantity Unit Price per unit Net Value BGN Transport: 1180774272 Shipping Point: ADC/LDC DE, Karlsruhe Shipping Type: Truck Ship To Party: 95100938 ALFREDO GIOACCHINO OOD ul. Andrey Germanov 11 BG-1336 SOFIA Delivery No.: 823025507 Delivery Date: 13.01.2023 Delivery Type: Standard Order AA Your Order No.: 20230103-154257-011O From: 03.01.2023 Our Order No.: 210492510 10 Nozzle And Holder Assy 2 EA Material: 0.432.231.664.80C Material Entered: 0.432.231.664 EAN: 3165143215791 179,20 358,40 Dispatch element: 106650185 2 EA 20 Hole-Type Nozzle 4 EA Material: 0.433.171.193.8GA Material Entered: 0.433.171.193 EAN: 4047024542822 33,99 135,96 Dispatch element: 106650185 4 EA Total net value: 494,36 VAT:* Z9 0,00 % 494,36 0,00 Invoice amount: 494,36 * Triangular transaction taxable at the customer according to Art. 141,2006/112/EC. This document is legally binding without signature. Incoterms: DAP SOFIA Payment terms: Up to 23.01.2023 you receive 2,000 % discount Up to 08.02.2023 without deduction Country of origin Index (represents the last three digits of part number) Brazil 8GA India 80CROBERTO S.R.L. Automotive Aftermarket Robert Bosch S.R.L., Str. Horia Macelariu nr. 30-34, RO-013937 Bucuresti Capitalul Social: 169.363.000 Lei, Nr. Ord. Reg. com.: J40/7601/1994 Citibank Europe Plc Dublin, Romania Branch Citibank Europe Plc Dublin, Bulgaria Branch SWIFT CODE: CITIROBU SWIFT CODE: CITIBGSF IBAN RON: RO45 CITI 0000 0007 2488 3001 IBAN BGN: BG54 CITI 9250 1001 0086 00 IBAN EURO: RO48 CITI 0000 0007 2488 3044 Invoice 2/ 2 Document No.: 2045175575 Date: 09.01.2023 Sold To party: 95100938 Account No.: 95100938 Country of origin HS Code Quantity UoM Amount BGN Brazil 84099900 4 EA 135,96 135,96 India 84099900 2 EA 358,40 358,40 Marking Dispatch element type Physical dimension of dispatch element Unit of measure Gross Weight Unit of measure 106650185 Corrugated carton 246 166 123 MM 0,959 KG Country of origin Item numbers Total amount Brazil 20 135,96 India 10 358,40 Element type: Corrugated carton Number of elements: 1 0,959 KG"; // 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/