// 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)#(?=item)").unwrap();
let string = "#333 /*do not track*/
#ff0000 /*do not track*/
#item1 /*found*/
#item2 /*found*/
#item3 /*found*/
#item /*found*/
#item /*found*/
#item /*found*/";
let substitution = ".";
// 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/