// 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)^[0-9]* *([a-zA-Z]+[0-9]*)+( *\+ *[0-9]*([a-zA-Z]{1,2}[0-9]*))* *-> *[0-9]* *([a-zA-Z]+[0-9]*)+( *\+ *[0-9]*([a-zA-Z]{1,2}[0-9]*))* *; *[a-z][0-9]+( *\* *[0-9]*([a-zA-Z]{1,2}[0-9]*))*$").unwrap();
let string = "2H2 + O2 -> 2H2O; k1*H2*H2*O2
C + O2 -> CO2; k2*C*O2";
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/