// 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 = "x (a) y -> a
x (a b) y -> a b
x (a b c) y -> a b c
x (a b() c) y -> a b() c
x (a() b() c) y -> a() b() c
x (a b() c()) y -> a b() c()
x (a b(a) c) y -> a
x (a (b() c)) y -> b() c
x () y -> empty
";
// 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/