Function libmacchina::extra::is_int [−][src]
pub fn is_int(s: String) -> Result<(), String>
Expand description
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);