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

@"
"
sgim

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#"(?sim)^<(?<Direction>(Send|Recv)) TYPE=""(?<Function>.+?)"" UTC=""(?<date>.+?)"" ID=""(?<ID>.+?)""(?:\s*\/>|>(?<Message>.*?)<\/\1>)$"#).unwrap(); let string = "<Recv TYPE=\"Select.req\" UTC=\"05.11.2024 01:43:35\" ID=\"2130706432\" /> <Send TYPE=\"Select.req\" UTC=\"05.11.2024 01:43:35\" ID=\"1152\" /> <Send TYPE=\"Select.rsp\" UTC=\"05.11.2024 01:43:35\" ID=\"2130706432\" /> <Send TYPE=\"S1F13W\" UTC=\"05.11.2024 01:43:35\" ID=\"1153\"> <List Items=\"2\"> <Ascii Size=\"17\" ItemName=\"MDLN\">SECSService</Ascii> <Ascii Size=\"20\" ItemName=\"SOFTREV\">1.0</Ascii> </List> </Send> <Recv TYPE=\"Select.rsp\" UTC=\"05.11.2024 01:43:35\" ID=\"1152\" /> <Recv TYPE=\"S1F14\" UTC=\"05.11.2024 01:43:36\" ID=\"1153\"> <List Items=\"2\"> <Binary Size=\"4\">0x00</Binary> <List Items=\"0\" /> </List> </Recv> <Recv TYPE=\"S1F13W\" UTC=\"05.11.2024 01:43:36\" ID=\"1\"> <List Items=\"0\" /> </Recv> <Send TYPE=\"S2F34\" UTC=\"05.11.2024 01:43:38\" ID=\"4\"> <Binary Size=\"4\" ItemName=\"DRACK\">0x00</Binary> </Send> <Recv TYPE=\"S2F37W\" UTC=\"05.11.2024 01:43:39\" ID=\"5\"> <List Items=\"2\"> <Boolean Size=\"5\">False</Boolean> <List Items=\"17\"> <UInt32 Size=\"1\">1</UInt32> <UInt32 Size=\"1\">2</UInt32> <UInt32 Size=\"1\">3</UInt32> <UInt32 Size=\"1\">5</UInt32> <UInt32 Size=\"1\">6</UInt32> <UInt32 Size=\"2\">10</UInt32> <UInt32 Size=\"2\">11</UInt32> <UInt32 Size=\"2\">20</UInt32> <UInt32 Size=\"2\">21</UInt32> <UInt32 Size=\"2\">22</UInt32> <UInt32 Size=\"2\">40</UInt32> <UInt32 Size=\"2\">41</UInt32> <UInt32 Size=\"2\">42</UInt32> <UInt32 Size=\"2\">50</UInt32> <UInt32 Size=\"2\">52</UInt32> <UInt32 Size=\"2\">70</UInt32> <UInt32 Size=\"2\">71</UInt32> </List> </List> </Recv>"; // 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/