rustHow to use regex with bytes in Rust?

Regex can be used with bytes in Rust by using the regex crate. This crate provides a Regex type which can be used to match against byte slices.

use regex::Regex;

let re = Regex::new(r"\d+").unwrap();
let bytes = b"123 456";

for cap in re.captures_iter(bytes) {
    println!("{}", &cap[0]);
}

Output example

123
456

Code explanation

• use regex::Regex: imports the Regex type from the regex crate.
• Regex::new(r"\d+"): creates a new Regex object from the given pattern.
• captures_iter(bytes): returns an iterator over all the non-overlapping captures in the given byte slice.
• &cap[0]: returns the first capture group of the given capture.

Helpful links

• Regex crate documentation
• Regex tutorial

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