// 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-Za-z].*\R\K[0-9](?=\R0$)").unwrap();
let string = "ABC
5
0
gdfgdfg
-----------
GHN
0
ffffffff
fffff
ffff
trte
-------------
H
1
0
----------------";
let substitution = "\\n";
// 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/