Function prompt_until_ok 

pub fn prompt_until_ok<T>(prompt: &(impl ToString + Display + ?Sized)) -> T
where
    T: FromStr + 'static,

Creates a CLI prompt and repeatetly asks the user for input until their input is of valid type.

Example

use read_stdin;

let n: i32 = read_stdin::prompt_until_ok("Enter a number: ");

println!("You entered: {}", n);