Escape Regex
Escape regular expression special characters in order to make it able to be concatenated safely by users.
Example
extern crate escape_regex;
extern crate regex;
use Regex;
let pattern = "123*456";
let escaped_pattern = escape_string;
let reg = new.unwrap;
assert_eq!;
Crates.io
https://crates.io/crates/escape-regex