#[test]
fn replace_with_mut_closure() {
let input = "5+183/32";
let mut last_digits: Vec<u8> = Vec::new();
let output = lazy_regex::regex_replace_all!(
r"\d*(\d)",
input,
|number, last_digit: &str| {
last_digits.push(last_digit.parse().unwrap());
format!("[{number}]")
}
);
assert_eq!(output, "[5]+[183]/[32]");
assert_eq!(last_digits, [5, 3, 2]);
}