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

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)^(?:\+4[39]|004[39]|0|\+\(49\)|\(\+49\))\s?(?=(?:[^\d\n]*\d){10,12}(?!\d))(\()?[19][1567]\d{1,2}(?(1)\))\s?\d(?:[ /-]?\d)+").unwrap(); let string = "################################### This is allowed ########################## +49 15207930698 +49 15207955279 +49 1739341284 +49 1626589266 +49915175461907 +4915207930698 +491635556416 017687400179 015903900297 015175355164 015175354885 01771789427 +49 915175461907 +43 915175461907 +49159039012341 +43159039012341 +4915207829969 +4917697400179 +4915903904567 +4915902944599 +4915902944599 +4915903904567 +491739341284 +431739341284 +49 176 97 456 123 0176 79 123 17 9 0176 97 50 01 79 0176 79 123 179 0174 80123179 0049 915175461907 0043 915175461907 0049159039012341 0043159039012341 004915207829969 (+49) 17697123456 +(49) (1739) 34 12 84 +49 (1739) 34-12-84 ############################################################################################ ################################### This is NOT allowed #################################### 012345678901234 123w345345345345 0123456789101191919 ### Too short +49 15902 +49 1590123 +49 15903567 +49 177178796 +49 757130309 +4915902 +491590123 +4915903567 +49177178796 +49757130309 ### Too long +49 1590345985412 +491590345985412 ### Not German and not Austrain format +12127319863 +13322014056 +12126712234 +427532697710 +417868150810 +287533002875 "; // 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/