// 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"(?mx)(?(DEFINE)
(?<key>\w+)
(?<sep>\s*=\s*)
(?<value>(?:(?!(?&key)(?&sep))[^()=])+)
(?<par>\((?:[^()]+|(?&par))+\))
)
(?P<k>(?&key))(?&sep)(?P<v>(?:(?&value)|(?&par)))").unwrap();
let string = "drop = blah blah blah something keep = bar foo nlah aaaa rename = (a=b d=e) obs=4 where = (foo > 45 and bar == 35 and (bar == 45))";
// 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/