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)mailto:([^\"]+)"#).unwrap(); let string = "<p><a href=\"mailto:info@tartaytantas.es\"> info@tartaytantas.es</a></p> <p>No cogemos pedidos por mail.</p> <p></p> </div><!-- .entry-content --> <footer class=\"entry-footer\"> </footer><!-- .entry-footer --> </div> </article><!-- #post-## --> </main><!-- #main --> </div><!-- #primary --> </div></div> <footer id=\"colophon\" class=\"site-footer\" role=\"contentinfo\" itemscope=\"\" itemtype=\"http://schema.org/WPFooter\"> <div class=\"container\"> <div class=\"footer-t\"> <div class=\"row\"> <div class=\"three-cols\"> <div class=\"col\"> </div> <div class=\"col center\"> <section class=\"widget widget_contact_form\"> </section> </div> <div class=\"col\"> </div> </div> </div> </div> <p><a href=\"mailto:info@tartaytantas.es\"> info@tartaytantas.es</a></p> <div class=\"site-info\"> <span> ©2020 <a href=\"http://tartaytantas.es/\">Tartaytantas - Tartas y bizccochos a domicilio en Aravaca</a>. </span> Bakes and Cakes | Desarrollado por <a href=\"https://rarathemes.com/\" rel=\"nofollow\" target=\"_blank\"> Rara Theme </a> Funciona gracias a <a href=\"https://wordpress.org/\">WordPress.</a> </div><!-- .site-info --> </div> </footer><!-- #colophon --> <div class=\"overlay\"></div> <a href=\"javascript:void(0);\" class=\"btn-top\"><span>Arriba</span></a> </div><!-- #acc-content --> </div><!-- #page --> <script type=\"text/javascript\" src=\"https://secureservercdn.net/160.153.137.170/zm5.b57.myftpupload.com/wp-content/themes/bakes-and-cakes/js/owl.carousel.min.js javascriptvue.jsEdit tags "; // 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/