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)(?<event>^.\S*[^\n<]*(?:(?:<(?!)|\n(?!$))[^\n]*)*(?:|\n$|\z))").unwrap(); let string = "isDraggingObject : True id : afbbdeb7-9fd4-4b53-ab17-742809154ba9 condition : {or, matches System.Object[] (?i)(^.*?host failure alert.*?www\\.jennycraig\\.com\\.au.*?$), matches System.Object[] (?i)(^.*?\\bwarning\\b.*?www\\.jennycraig\\.com\\.au.*?$)} catch_all : False advanced_condition : {} actions : {route PVG22KK, severity warning} isDraggingObject : True id : 3b5aa785-b854-4e43-900a-225da5786a27 condition : {or, matches System.Object[] (?i)(^.*?\\bcritical\\b.*?www\\.jennycraig\\.com\\.au.*?$)} catch_all : False advanced_condition : {} actions : {severity critical, route PVG22KK} **isDraggingObject : True id : a8420998-fbca-486b-9ff7-d03b9e16536e condition : {or, matches System.Object[] (?i)(^.*?\\bcritical\\b.*?www\\.jennycraig\\.com$), matches System.Object[] (?i)(^.*?\\bcritical\\b.*?locations\\.jennycraig\\.com)} catch_all : False advanced_condition : {} actions : {severity critical, route PW0VV83}**"; // 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/