// 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)([^\s]*\s*)\\rem\{(?:lp|db)\}(\{((?>[^{}]|\n|(?2))*)\})(\s?[^\s]*)").unwrap();
let string = "
Some text etc word\\rem{lp}{ more text {\\ce{O2}} further text {\\ce{H2O}} . some other text the $m = 48$ ({\\ce{O2}}) ps}.
\\rem{lp}{ more text {\\ce{O2}} further text {\\ce{H2O}} . some other text the $m = 48$ ({\\ce{O2}}) ps
where more text {\\ce{O2}} further text {\\ce{H2O}} . some other text the $m = 48$ ({\\ce{O2}}) ps from
who more text {\\ce{O2}} further text {\\ce{H2O}} . some other text the $m = 48$ ({\\ce{O2}}) ps.}
\\rem{lp}{ more text {\\ce{O2}} further text {\\ce{H2O}} . some other text the $m = 48$ ({\\ce{O2}}) ps.
more text {\\ce{O2}} further text {\\ce{H2O}} . some other text the $m = 48$ ({\\ce{O2}}) ps.}
\\subsection{other}
Our bla bla bla";
let substitution = "$1\\\\textcolor{red}{\\\\underline{<<ReTe>>}}$4";
// 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/