// 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)(bra){3}").unwrap();
let string = "# Quantifier：{number} 篇
#下方為測試文字區塊
b
br
bra
brabra
brabrabra
brabrabra brabrabrabarbarbabarbarbab
＃解釋：藍色部分就是透過規則/(bra){3}/所配對成功的文字，當 (bra)這組配對出現三次食就算配對成功。
";
// 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/