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

/
/
gis

Test String

Substitution

Processing...

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"(?is)(<Contract)(.*)(Contract>)").unwrap(); let string = "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?> <Records xmlns=\"http://www.datapump.cig.com\"> <Contract phaseId=\"4\" operation=\"2\"> <General> <ContractCode>8848</ContractCode> <DateOfSignature>2009-09-08</DateOfSignature> <CreditPurpose id=\"20\"/> <NegativeStatus id=\"4\"/> <ApplicationDate>2009-09-08</ApplicationDate> <StartDate>2009-09-08</StartDate> <ExpectedEndDate>2011-03-31</ExpectedEndDate> <Subjects> <Subject roleId=\"1\"> <Entity> <Individual gender=\"1\"> <FirstName> <Text language=\"uk-UA\">украинский</Text> </FirstName> <Surname> <Text language=\"uk-UA\">Первый</Text> </Surname> <FathersName> <Text language=\"uk-UA\">контрагент</Text> </FathersName> <Classification id=\"1\"/> <DateOfBirth>1980-12-06</DateOfBirth> <Residency id=\"1\"/> <Citizenship code=\"UA\"/> <MaritalStatus id=\"2\"/> <Identifications> <Identification typeId=\"2\"> <Number>2554209876</Number> </Identification> <Identification typeId=\"4\"> <Number>ВЦ620997</Number> <IssueDate>1997-04-01</IssueDate> <Authority language=\"uk-UA\">Дебальцевский ГОУМВД Украины в Донецкой области</Authority> </Identification> <Identification typeId=\"1\"> <Number>2554209876</Number> </Identification> </Identifications> <Addresses> <Address typeId=\"2\"> <Street> <Text language=\"uk-UA\">м. Kharkov, вул. Street, буд. 1, кв. 1</Text> </Street> </Address> </Addresses> </Individual> </Entity> </Subject> </Subjects> </General> <Type> <Credit paymentPeriodId=\"9\" paymentMethodId=\"6\"> <CreditLimit currency=\"USD\">7800.0</CreditLimit> <Records> <Record accountingDate=\"2011-04-20\"> <CreditUsage id=\"3\"/> <ResidualAmount currency=\"USD\">7800.0</ResidualAmount> <OverdueAmount currency=\"USD\">0.0</OverdueAmount> </Record> </Records> </Credit> </Type> </Contract>"; let substitution = ""; // result will be a String with the substituted value let result = regex.replace_all(string, substitution); println!("{}", 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 Rust, please visit: https://docs.rs/regex/latest/regex/