sandwich/src/eval.rs

pub fn do_math(arguments: String, operator: char) -> u32 {
    let split_args = arguments.split("-").collect::<Vec<&str>>();

    let num1: u32 = match split_args[0].parse() {
        Ok(num) => num,
        Err(_e) => panic!("ArgumentError: Not a number: {}", split_args[0]),
    };

    let num2: u32 = match split_args[1].parse() {
        Ok(num) => num,
        Err(_e) => panic!("ArgumentError: Not a number: {}", split_args[1]),
    };

    match operator {
        '+' => num1 + num2,
        '-' => num1 - num2,
        '*' => num1 * num2,
        '/' => num1 / num2,
        _ => panic!("SyntaxError: Unknown operator {}", operator),
    }
}