Function libmacchina::extra::is_int

pub fn is_int(s: String) -> Result<(), String>

This function checks if the given String is a valid integer, returning an error message if the check fails.

Example

use libmacchina::extra::is_int;

let a = String::from("123");
let b = String::from("ABC123");

assert_eq!(is_int(a).is_ok(), true);
assert_eq!(is_int(b).is_ok(), false);