// 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"(?x) \$\K\s*((?:[^<$\s]+|(?!\s+[<$])\s+)*)\s*(?=(?:<(*ACCEPT)|\$|$)(*SKIP)(*F))
|(?!^)<\K\s*((?:[^<$\s]+|(?!\s+[<$])\s+)*)\s*(\$?)
|[^$]+(*SKIP)(*F)").unwrap();
let string = "random < test
nope $ foo $ bar < a $ qux < biz$fx<hk$
$foo<bar<baz$ foo buh<bar<baz$
$ foo $ a < z $ a <b <z$
";
let substitution = " \\1\\2 \\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/