Function beginner_tools::input

pub fn input<T>(prompt: &str) -> Result<T, Box<Error>> where
    T: FromStr,
    T::Err: 'static + Error, 

Inspired by Python's "input()", this function does (almost) exactly the same thing, takes an input from the user and tries to parse it to the specified type. Note that this function requires a prompt for the user.

Examples

// Will loop as long as user does not pass in a float,
// Stores the resulting value in "my_int" for later use
let my_int: i64 = loop {
    if let Ok(n) = input("Type an integer: ") {
        break n
    };
    println!("Wrong Input!");
};

// Shorter, asks once. Crashes if input is invalid.
// Passing in an empty &str results in the same
// functionality as "get_stdin()".
let my_float = input::<f64>("")
    .expect("Error, not a float");

Errors

Function returns an Err(error) when user inputs an incorrect type.