// 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)(^[0-9]{4}?[0-9]$|^[0-9]{4}?[0-9]-[0-9]{4}$)").unwrap();
let string = "12345-1234
12345
1
12
123
1234
12345-
12345-1
12345-12
12345-123
";
let substitution = "";
// result will be a String with the substituted value
let result = regex.replace_all(string, substitution);
println!("{}", result);
}
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/