// 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)^A(?:(?![A-Z]{2}).)*?\K\d+").unwrap();
let string = "A bcd 1 should match and capture 1
Abcd1 should match and capture 1
A bcd should not match because there is no number
A BCd 1 should not match because there is a capital C between the A and the number
A bcd 1 EF should match because 1 is before the EF";
// 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/