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

r"
"
gm

Test String

Code Generator

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)(^(THE\s)?((7)|ESTATE OF\s))?(.*?)(-?\s?DECEASED)?((P\.?R\.? OF THE)?(?(3)|\sESTATE OF))$").unwrap(); let string = "SMITH JOHN ESTATE OF SMITH JOHN J ESTATE OF SMITH JOHN JAMES ESTATE OF SMITH, JOHN ESTATE OF SMITH, JOHN J ESTATE OF SMITH, JOHN JAMES ESTATE OF ESTATE OF JOHN SMITH - DECEASED ESTATE OF JOHN J SMITH - DECEASED ESTATE OF JOHN JAMES SMITH - DECEASED SMITH, JOHN DECEASED ESTATE OF SMITH, JOHN J DECEASED ESTATE OF SMITH, JOHN JAMES DECEASED ESTATE OF THE ESTATE OF JOHN SMITH THE ESTATE OF JOHN J. SMITH THE ESTATE OF JOHN JAMES SMITH THE ESTATE OF JOHN J. SMITH, JR. THE ESTATE OF JOHN SMITH DECEASED THE ESTATE OF JOHN J. SMITH DECEASED THE ESTATE OF JOHN JAMES SMITH DECEASED THE ESTATE OF JOHN J. SMITH, JR. DECEASED SMITH, JOHN, P.R. OF THE ESTATE OF SMITH, JOHN, J, P.R. OF THE ESTATE OF SMTIH, JOHN, JAMES, P.R. OF THE ESTATE OF SMITH, JOHN JAMES EST EST OF JOHN SMITH SMITH REAL ESTATE LLC PRALINES"; // 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/