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

r"
"
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)^(?P<unit_design>Z)(?P<unit_type>SFW|SF)(?P<unit_size>200|160|125|100|32|40|50|63|80)(?P<mounting_type>F)(?P<decompression_feature>0|1)(?P<sep_1>-)(?P<cracking_pressure>1)(?P<sep_2>-)(?P<unit_series>1X|2X)(?P<sep_3>/)(?P<seal_material>M|V)(?P<sep_4>/)(?P<pipe_port>12|01)(?P<orifice_position>D|)(?P<orifice_diameter>00|08|10|12|15|40|)(?P<additional_details>(.|[0-9])*)$").unwrap(); let string = "ZSF40F1-1-1X/M/01 ZSF40F0-1-1X/M/01 ZSF100F0-1-1X/M/01 ZSF80F1-1-1X/M/01D00 ZSF50F1-1-1X/M/01D00 ZSFW40F1-1-1X/M/01 ZSF100F1-1-1X/M/01 ZSFW100F1-1-1X/M/01 ZSF63F1-1-1X/M/01D00 ZSF80F0-1-1X/M/01D00 ZSF50F0-1-1X/M/01D00 ZSFW50F1-1-1X/M/01 ZSF40F0-1-1X/M/01SO1 ZSF63F0-1-1X/M/01D00 ZSFW80F0-1-1X/M/01 ZSFW100F0-1-1X/M/01 ZSFW80F1-1-1X/M/01 ZSF50F0-1-1X/M/01SO1 ZSF32F0-1-1X/M/01SO1 ZSF63F0-1-1X/M/01SO1 ZSFW160F0-1-1X/M/01 ZSFW40F0-1-1X/M/01 ZSFW63F1-1-1X/M/01 ZSFW63F0-1-1X/M/01 ZSFW50F0-1-1X/M/01 ZSF160F1-1-1X/M/01 ZSFW160F1-1-1X/M/01 ZSF160F0-1-1X/M/01 ZSF32F0-1-1X/M/01 ZSF32F1-1-1X/M/01SO6 ZSF100F1-1-1X/V/01 ZSF100F0-1-1X/M/01SO1 ZSF50F1-1-1X/M/01SO6 ZSF40F1-1-1X/M/01SO6 ZSFW32F0-1-1X/M/01 ZSF32F1-1-1X/M/01 ZSF80F0-1-1X/M/01SO1 ZSF80F1-1-1X/M/01SO1 ZSFW100F1-1-1X/V/01 ZSFW50F1-1-1X/V/01 ZSFW32F1-1-1X/M/01 ZSF160F0-1-1X/V/01 ZSF125F0-1-2X/M/01 ZSF125F1-1-2X/M/01 ZSFW125F1-1-2X/M/01 ZSFW125F0-1-2X/M/01 ZSF125F0-1-2X/V/01 ZSF125F1-1-2X/V/01 ZSFW125F0-1-2X/V/01 ZSF125F0-1-2X/M/01SO1 ZSF100F0-1-1X/V/01 ZSF63F0-1-1X/V/01D00 ZSF50F0-1-1X/V/01D00 ZSFW100F0-1-1X/V/01 ZSFW63F0-1-1X/V/01 ZSFW50F0-1-1X/V/01 ZSF125F1-1-2X/M/01SO6 ZSF200F0-1-2X/M/01D40 ZSFW200F0-1-2X/M/01D40 ZSFW125F1-1-2X/M/01SO6 ZSFW63F1-1-1X/V/01 ZSFW40F0-1-1X/V/01 ZSF160F1-1-1X/M/01SO12 ZSF125F0-1-2X/M/01SO6 ZSF160F0-1-1X/M/01SO6 ZSFW160F0-1-1X/M/01SO12 ZSF80F0-1-1X/V/01D00 ZSFW200F0-1-2X/V/01D40 ZSF100F0-1-1X/M/01SO13 ZSF125F0-1-2X/M/01SO13 ZSF125F0-1-2X/M/01SO14 ZSF63F0-1-1X/M/01D08 ZSF50F0-1-1X/M/01D08 ZSF80F0-1-1X/M/01D10 ZSF160F1-1-1X/M/01SO6 ZSF32F1-1-1X/M/01D08 ZSF100F0-1-1X/M/01D10 ZSF125F0-1-2X/M/01D12 ZSF160F0-1-1X/M/01D15 ZSF100F1-1-1X/M/01D10SO6 "; // 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/