// 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])\s+(?=(?:st|[rn]d|th)(?: [^\W\d_]|$))").unwrap();
let string = "10 th elementary
1 st grade
133 rd anniversary
abc123 th 33333 rddccc
10 thetree
20 street
";
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/