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"
"
mg

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)^((?:\[.+?:.*?\])+)(.*)$").unwrap(); let string = "[ar:胡彦斌] [ti:月光] [00:00.86]月光(秦时明月主题曲) [00:06.31]歌手 胡彦斌 [00:08.68]作词 林文炫 [00:10.49]作曲 胡彦斌 [00:20.11]月光色 [00:22.30]女子香 [00:24.51]泪断剑 [00:26.70]情多长 [00:28.95]有多痛 [00:30.97]无字想 [00:33.35][00:33.35]忘了你 [00:39.43]孤单魂 [00:41.51]随风荡 [00:43.57]谁去笑 [00:45.87]痴情郎 [00:48.03]这红尘的战场 [00:52.95]千军万马有谁能称王 [01:01.69]过情关 [01:06.00]谁敢闯 [01:10.42]望明月 [01:15.62]心悲凉 [01:19.13]千古恨 [01:23.45]轮回尝 [01:27.76]眼一闭 [01:32.71]谁最狂 [01:38.90]这世道的无常 [01:43.23]注定敢爱的人一生伤 [02:07.33]月光色 [02:09.20]女子香 [02:11.49]泪断剑 [02:13.58]情多长 [02:15.80]有多痛 [02:17.87]无字想 [02:20.23]忘了你 [02:26.21]孤单魂 [02:28.20]随风荡 [02:30.56]谁去笑 [02:32.64]痴情郎 [02:34.94]这红尘的战场 [02:39.70]千军万马有谁能称王 [02:48.65]过情关 [02:52.66]谁敢闯 [02:57.34]望明月 [03:02.44]心悲凉 [03:05.97]千古恨 [03:09.99]轮回尝 [03:14.67]眼一闭 [03:19.95]谁最狂 [03:30.06]过情关 [03:34.34]谁敢闯 [03:38.78]望明月 [03:43.92]心悲凉 [03:47.58]千古恨 [03:51.50]轮回尝 [03:55.96]眼一闭 [04:01.51]谁最狂 [04:07.21]这世道的无常 [04:21.34]注定敢爱的人一生伤"; // 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/