// 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"(?xm)^(.{10}).*$").unwrap();
let string = "Mary had a little lamb,
little lamb, little lamb.
Mary had a little lamb, its fleece was white as snow.
And everywhere that Mary went,
Mary went, Mary went,
and everywhere that Mary went, the lamb was sure to go.";
let substitution = "$1";
// 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/