// 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)^K(?!.*#.*#)(?:#?[0-9a-z]){1,3}#?\$$").unwrap();
let string = "Kabc$
Ka#bc$
K01#a$
K#1ab$
Ka1a#$
K#1a#$
Ka1ab$
Pattern starts with the letter K
Is followed by any number (0-9) or any letter (a-z) between 1 and 3 times.
The symbol # can exist 0 or 1 time, anywhere after the starting K.
The pattern must end with the symbol $.";
// 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/