// 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)(^[^:\n]+:).*(\n\1.*)*").unwrap();
let string = "Subject: this is text not to be matched
Subject2: this is text to be recognized.
Subject2: This text can be different.
Subject2: ..and this text will be also matched in the first match.
Subject3: This text alone.
this text will not be matched
Subject2: New start of a new match.
Subject2: continuation of the above line";
// 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/