// 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"\b(first|second|third|fourth)(?=(?:\s*(?:,|and)\s*(?:first|second|third|fourth))*\s+section\b)").unwrap();
let string = "1. something first, other and then second, third and fourth section
2. something first and other and then second, third and fourth section
3. something first, second other and then second, third and fourth section
4. fourth section
5. something first, second, third and fourth section
";
// 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/