// 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"(?mi)\(([a-z -]+)\w+?(\d+)\W+\1\w+\)").unwrap();
let string = "(beginner_post12 - beginner_baseline)
(intermediate_post5 - intermediate_baseline)
(framework notes_posttest4 - framework notes_baseline)
(note-taking instruction_posttest33 - note-taking instruction_baseline)
";
let substitution = "Gain_$2($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/