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

/
/
s

Test String

Code Generator

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)<my:group1>(.*)<\/my:group1>").unwrap(); let string = "<?xml version=\"1.0\" encoding=\"UTF-8\"?> <?mso-infoPathSolution solutionVersion=\"1.0.0.182\" productVersion=\"15.0.0\" PIVersion=\"1.0.0.0\" href=\"http://sp01/hp/Therapy/Forms/template.xsn\" name=\"urn:schemas-microsoft-com:office:infopath:Therapy:-myXSD-2013-03-01T10-07-30\" ?> <?mso-application progid=\"InfoPath.Document\" versionProgid=\"InfoPath.Document.3\"?> <my:myFields xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:pc=\"http://schemas.microsoft.com/office/infopath/2007/PartnerControls\" xmlns:ma=\"http://schemas.microsoft.com/office/2009/metadata/properties/metaAttributes\" xmlns:d=\"http://schemas.microsoft.com/office/infopath/2009/WSSList/dataFields\" xmlns:q=\"http://schemas.microsoft.com/office/infopath/2009/WSSList/queryFields\" xmlns:dfs=\"http://schemas.microsoft.com/office/infopath/2003/dataFormSolution\" xmlns:dms=\"http://schemas.microsoft.com/office/2009/documentManagement/types\" xmlns:xhtml=\"http://www.w3.org/1999/xhtml\" xmlns:my=\"http://schemas.microsoft.com/office/infopath/2003/myXSD/2013-03-01T10:07:30\" xmlns:xd=\"http://schemas.microsoft.com/office/infopath/2003\" xml:lang=\"en-us\"> <my:PatientID>1</my:PatientID> <my:Name>name</my:Name> <my:Age>29.0000000000000</my:Age> <my:Gender>gender</my:Gender> <my:Date>2015-12-09</my:Date> <my:group1> <my:group2> <my:field1>1</my:field1> <my:PName>pname</my:PName> <my:PPrice>10000.0000000000</my:PPrice> <my:field11 xsi:nil=\"true\"></my:field11> </my:group2> <my:group2> <my:field1>9</my:field1> <my:PName>pname </my:PName> <my:PPrice>10000.0000000000</my:PPrice> <my:field11 xsi:nil=\"true\"></my:field11> </my:group2> </my:group1> <my:field4></my:field4> <my:field5></my:field5> <my:Status>false</my:Status> <my:Confirm>false</my:Confirm> <my:field6></my:field6> <my:field7></my:field7> <my:field8></my:field8> <my:TPrice>20000</my:TPrice> <my:field12></my:field12> <my:field13></my:field13> <my:insurance>1</my:insurance> <my:Partner>partner</my:Partner> <my:Doctor>doctor</my:Doctor> </my:myFields>"; // result will be a tuple containing the start and end indices for the first match in the string let result = regex.captures(string); let (start, end) = match result { Some((s, e)) => (s, e), None => { // ... } }; println!("{}", &string[start, end]); }

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/