// 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"(?xm)(?(DEFINE)
(?<value>[^()\r\n]+)
(?<groupVal>(?&group)|(?&value))
(?<group>(?&value)*\((?&groupVal)\)(?&groupVal)*)
)
^(?&group)$").unwrap();
let string = "(F(i(r(s)t))) ((S)(e)((c)(o))n)d) (((((((Third)))))))
(F(i(r(s)t))) ((S)(e)((c)(o))n)d (((((((Third)))))))
((F(i(r(s)t))) ((S)(e)((c)(o))n)d) (((((((Third)))))))";
// 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/