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)\"orderId\":\"(?<orderId>[^\"]+)\"},\"error\":\{\"errorCode\":\"(?<errorCode>[^\"]+)\""#).unwrap(); let string = "message: Send jms message [queue=SEP.TO.PEIN, statusCode=200, idempotencyId=b95d0d10-9709-4299-9d3e-8c65dd5a539d, processId=PE2400000582026, delivApp=null, message={\"transactionItems\":[{\"itemId\":\"4f2170cd-35f6-4d03-b0fe-6ebbca6e00cb\",\"status\":\"FAILED\",\"accountIdentification\":{\"contractAccountNumber\":{\"branchCode\":\"0784\",\"accountNumber\":\"0190595009\",\"currencyCode\":\"INR\"}}},{\"itemId\":\"adea3dff-8e02-433e-a2ad-94bac828989b\",\"status\":\"FAILED\",\"accountIdentification\":{\"contractAccountNumber\":{\"branchCode\":\"0784\",\"accountNumber\":\"0190595009\",\"currencyCode\":\"INR\"}}},{\"itemId\":\"bf96b534-2150-4228-843f-9fb920a1f44f\",\"status\":\"FAILED\",\"accountIdentification\":{\"contractAccountNumber\":{\"branchCode\":\"0784\",\"accountNumber\":\"0190595009\",\"currencyCode\":\"INR\"}}},{\"itemId\":\"cb6e42ac-ee83-48b6-8213-7faf0311c6d0\",\"status\":\"FAILED\",\"accountIdentification\":{\"contractAccountNumber\":{\"branchCode\":\"0784\",\"accountNumber\":\"0190595009\",\"currencyCode\":\"INR\"}}},{\"itemId\":\"bdd8a76f-ddb4-4616-a793-68ddd72aad0e\",\"status\":\"FAILED\",\"accountIdentification\":{\"contractAccountNumber\":{\"branchCode\":\"0784\",\"accountNumber\":\"0190595009\",\"currencyCode\":\"INR\"}}},{\"itemId\":\"cb339f2a-ad85-410c-9043-275aa1e4fe17\",\"status\":\"FAILED\",\"accountIdentification\":{\"contractAccountNumber\":{\"branchCode\":\"0784\",\"accountNumber\":\"0190595011\",\"currencyCode\":\"INR\"}}}],\"orderStatusResponse\":{\"orderStatus\":\"ORDER_FAILURE\",\"orderId\":\"b95d0d10-9709-4299-9d3e-8c65dd5a539d\"},\"error\":{\"errorCode\":\"SEP013\",\"errorDescription\":\"Cannot find IDMS-0784 account by accNumber: 0190595009\"}}]"; // 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/