// 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)\A
(?> #MAIN iteration (atomic only for efficiency)
(?<upper>[A-Z]) # an uppercase letter
| # or
(?<lower>[a-z]) # a lowercase letter
| # or
(?<digit>[0-9]) # a digit
| # or
. # anything else
){8,}? #REPEATED 8+ times
#
#CONDITIONS:
(?(upper) # 1. There must be at least 1 uppercase
(?(lower) # 2. If (1), there must be 1 lowercase
(?(digit) # 3. If (2), there must be 1 digit
| (?!) # Else fail
) #
| (?!) # Else fail
) #
| (?!) # Else fail
) #").unwrap();
let string = "1Bc45678";
// result will be a tuple containing the start and end indices for the first match in the string
let result = regex.captures(string);
let (start, end) = match result {
Some((s, e)) => (s, e),
None => {
// ...
}
};
println!("{}", &string[start, end]);
}
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/