// 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"(?mi)\bch.*?\K\b(?:\d+|VI{0,3}|I(?:[XV]|I{0,2}))\b").unwrap();
let string = "\"chapter some word 12\"
\"chapter some word 12 some word\"
\"chapter some word I some word\"
\"chapter some word II some word\"
\"chapter some word III some word\"
\"chapter some word iv some word\"
\"chapter some word v some word\"
\"chapter some word vi some word\"
\"chapter some word vii some word\"
\"chapter some word viI some word\"
\"chapter some word ix some word\"
\"chapter some word x some word\"
\"chapter some word xi some word\"
";
// 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/