rust check valid email address using regex

To check if an email address is valid using a regular expression in Rust, you can use the regex crate. Here's an example of how you can accomplish this:

use regex::Regex;

fn is_valid_email(email: &str) -> bool {
    let email_regex = Regex::new(r"^[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,}$").unwrap();
    email_regex.is_match(email)
}

fn main() {
    let email = "[email protected]";
    if is_valid_email(email) {
        println!("Valid email address");
    } else {
        println!("Invalid email address");
    }
}

In this example, we define a function is_valid_email that takes an email address as a parameter and returns a boolean indicating whether the email address is valid or not. The regular expression used to validate the email address is ^[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,}$.

The is_match method of the Regex struct is used to check if the email address matches the regular expression. If it does, we consider it a valid email address.

In the main function, we call is_valid_email with an example email address and print the corresponding message based on the result. Keep in mind that this is a basic example, and you can modify the regular expression to suit your specific requirements for validating email addresses.