// 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)^([^a-zA-Z]*)([a-z])|(\.\s*)([a-z])").unwrap();
let string = ".this sentence
and this
This is already
.this sentence
and this.also this. and this.This one is not.";
let substitution = "$1\\U$2$3\\U$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/