// 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#"(?mx) (?(DEFINE)
(?<old> old [ ] string ) # (1)
)
(?|
( > ) # (2)
(?&old)
( < ) # (3)
|
( " ) # (2)
(?&old)
( " ) # (3)
|
( ' ) # (2)
(?&old)
( ' ) # (3)
|
( \( ) # (2)
(?&old)
( \) ) # (3)
)
"#).unwrap();
let string = "(old string) 'old string' old string >old string<
\"old string\" >old string< old string 'old string'
";
let substitution = "$2new string$3";
// 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/