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

/
/
gs

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)page="[0-9]+".+?subject="(?:Text Box|Sticky Note)".+?<\/span"#).unwrap(); let string = " ><text color=\"#FFFF00\" creationdate=\"D:20180307100631+04'00'\" flags=\"print,nozoom,norotate\" date=\"D:20180307100652+04'00'\" name=\"a60915a3-1c23-4f6d-b8d4-fbe0dd4890e9\" icon=\"Comment\" page=\"7\" rect=\"351.308000,135.732000,371.308000,153.732000\" subject=\"Sticky Note\" title=\"saddia\" ><contents-richtext ><body xmlns=\"http://www.w3.org/1999/xhtml\" xmlns:xfa=\"http://www.xfa.org/schema/xfa-data/1.0/\" xfa:APIVersion=\"Acrobat:9.0.0\" xfa:spec=\"2.0.2\" ><p dir=\"ltr\" ><span dir=\"ltr\" style=\"font-size:10.0pt;text-align:left;color:#000000;font-weight:normal;font-style:normal\" >As agreed with WPO that any unspecific area use GEN</span ><span dir=\"ltr\" style=\"font-size:11.0pt;text-align:left;color:#1D477B;font-weight:normal;font-style:normal\" >&#xD;</span ><span dir=\"ltr\" style=\"font-size:11.0pt;text-align:left;color:#000000;font-weight:normal;font-style:normal\" >&#xD;</span"; // 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/