// 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)(?<=ab|cd|ef|gh) *}} *{{ *(?=ab|cd|ef|gh)").unwrap();
let string = "{{ab}}{{ cd }}{{ ef }} {{ gh }} {{ gh }}{{ghen web|url=tr.uc}}
machintrcd}} {{ab}} {{cd}}
{{ab}}{{ab}}{{ab}}{{ab}}{{ab}}{{ab}}
{{ab}} {{ab}} {{ab}} {{ab}} {{ab}} {{ab}}
machintruc {{ab}} {{cd}}
{{ab}} {{cd}} {{ef}} [https://truc.org truc]
{{mr}} Trucmuche";
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/