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

/
/
g

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"\{\%\s(trans with \{.*\}|trans|transchoice)\s\%\}(.*)\{\%\s(endtrans|endtranschoice)\s\%\}").unwrap(); let string = "{% if estimate_delivery.text is not empty %} {% if estimate_delivery.day and estimate_delivery.month %} <strong>{% trans %}Order delivery estimation:{% endtrans %}</strong> {{ estimate_delivery.day }} {{ estimate_delivery.month | trans }} {{ estimate_delivery.text }} {{ estimate_delivery.interval }} {% elseif estimate_delivery.text %} <strong>{% trans %}Order delivery estimation:{% endtrans %}</strong> {{ estimate_delivery.text }} {{ estimate_delivery.interval }} {% endif %} <div class=\"emg-clear\"></div> {% else %} {% trans %}No delivery estimate data available.{% endtrans %} {% endif %} <div id=\"sameDay\"> <input id=\"same-day-chk\" type=\"checkbox\" name=\"shipping[courier][same_day]\" value=\"1\" class=\"gui-checkbox\" {% if same_day.show == false %}disabled=\"disabled\"{% endif %}> <label for=\"same-day-chk\" class=\"gui-label\">{% trans with {'%price%': money_format(same_day.price)} %}I want my order shipped today ( only %price%){% endtrans %}</label> {% if same_day.show != false %} <strong>{{ same_day.info.message|raw }} <a href=\"#\" data-count=\"{{ same_day.products|length }}\" id=\"sameDayDelivery\">( {{ same_day.products|length }} items )</a></strong> <div id=\"sameDayDelivery-emgBubble\" class=\"emg-bubble\"> {% for product in same_day.products %} <div class=\"emg-left\"> <img src=\"{{ product.image }}\" alt=\"\" /> </div> <div class=\"emg-right\"> {{ product.name }} </div> <div class=\"emg-clear\"></div> {% endfor %} <div class=\"button\"> <i class=\"icon-i27-round-close\"></i> </div> <div class=\"emg-clear\"></div> </div> {% endif %} </div> "; // 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/