// 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"(?:{{([\w-]+(?:\h+[\w-]+)*)|(?!\A)\G)(?:\h*\[([^]]+)]|\h*}})").unwrap();
let string = "{{word with spaces}}
{{word with spaces [sub1]}}
{{word with spaces [sub1] [sub 2] [Sub-3] }}";
// 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/