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

@"""
"""
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)(\[|){\n(?<tab> )"id": "[0-9]*",\n\<tab>"type": [0-9],\n\<tab>"content": "[^"]*",\n\<tab>"channel_id": "[0-9]*",\n\<tab>"author": {\n(?<dtab> )"id": "[^"]*",\n\<dtab>"username": "[^"]*",\n\<dtab>"avatar": "[^"]*",\n\<dtab>"discriminator": "([0-9]{4}|[0-9])",\n\<dtab>"public_flags": [0-9]*,\n\<dtab>"flags": [0-9]*,\n\<dtab>"banner": (null|"[0-9]*"),\n\<dtab>"accent_color": (null|"[^"]*"),\n\<dtab>"global_name": "[^"]*",\n\<dtab>"avatar_decoration_data": (null|"[^"]*"),\n\<dtab>"banner_color": (null|"[^"]*")\n\<tab>},\n\<tab>"attachments": \[[^\]]*\],\n\<tab>"embeds": \[[^\]]*],\n\<tab>"mentions": \[[^\]]*],\n\<tab>"mention_roles": \[[^\]]*\],\n\<tab>"pinned": (true:|false),\n\<tab>"mention_everyone": (true|false),\n\<tab>"tts": (true:|false),\n\<tab>"timestamp": "[0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}.[0-9]{6}\+[0-9]{2}:[0-9]{2}",\n\<tab>"edited_timestamp": (null|"[0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}.[0-9]{6}\+[0-9]{2}:[0-9]{2}"),\n\<tab>"flags": [0-9]*,\n\<tab>"components": \[[^\]]*]\n}(\]|\,|)"#).unwrap(); let string = "{ \"id\": \"1145344233713188874\", \"type\": 0, \"content\": \"913 - this icecream good\", \"channel_id\": \"1124414874454339715\", \"author\": { \"id\": \"746383273621717104\", \"username\": \"kalote.\", \"avatar\": \"95b9bdc7aa5784a2354e2ec5256ae736\", \"discriminator\": \"0\", \"public_flags\": 128, \"flags\": 128, \"banner\": null, \"accent_color\": null, \"global_name\": \"Carrot :3\", \"avatar_decoration_data\": null, \"banner_color\": null }, \"attachments\": [], \"embeds\": [], \"mentions\": [], \"mention_roles\": [], \"pinned\": false, \"mention_everyone\": false, \"tts\": false, \"timestamp\": \"2023-08-27T13:09:04.784000+00:00\", \"edited_timestamp\": null, \"flags\": 0, \"components\": [] },"; // 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/