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)^(?:\d\h+|[\d.]*[A-Z][A-Z\d.]*\h+)*[A-Z]{3,}").unwrap(); let string = "ID.4 ESTATE 109kW City Pure 52kWh 5dr Auto XC40 DIESEL ESTATE 2.0 D4 [190] Inscription Pro 5dr AWD Gea+ RAPID DIESEL HATCHBACK 1.6 TDI CR Elegance 5dr MODEL 3 120kW LONG RANGE AWD V40 DIESEL HATCHBACK D2 [120] Momentum 5dr Geartronic V60 DIESEL SPORTSWAGON 2.0 D4 [190] R DESIGN Plus 5dr Auto X3 ESTATE xDrive M40i 5dr Auto C CLASS DIESEL SALOON C250 BlueTEC SE 4dr Auto A CLASS DIESEL HATCHBACK A180d Sport Executive 5dr Auto 2 SERIES COUPE 218i Sport 2dr [Nav] Step Auto HILUX SPECIAL EDITIONS Invincible X Ltd Ed D/Cab P/Up 2.4 D+ C3 PICASSO 1.6 BlueHDi Platinum 5dr C3 HATCHBACK 1.2 PureTech 82 Flair 5dr XC40 DIESEL ESTATE XC40 1"; // 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/