advent-of-code-2019/src/main.rs

#[macro_use]
extern crate clap;

mod day_1;
mod day_2;
mod day_3;

fn main() {
    use clap::App;

    let yml = load_yaml!("cli.yml");
    let matches = App::from_yaml(yml).get_matches();

    let day = opt_str_to_int(matches.value_of("day"));
    let puzzle = opt_str_to_int(matches.value_of("puzzle"));

    match day {
        1 => match puzzle {
            1 => day_1::puzzle_1::solve(),
            2 => day_1::puzzle_2::solve(),
            _ => println!("unavailable puzzle given!"),
        },
        2 => match puzzle {
            1 => day_2::puzzle_1::solve(),
            2 => day_2::puzzle_2::solve(),
            _ => println!("unavailable puzzle given!"),
        },
        3 => match puzzle {
            1 => day_3::puzzle_1::solve(),
            2 => day_3::puzzle_2::solve(),
            _ => println!("unavailable puzzle given!"),
        },
        _ => println!("unavailable day given!"),
    }
}

fn opt_str_to_int(val: Option<&str>) -> i32 {
    match val {
        Some(val) => val.parse::<i32>().unwrap(),
        None => panic!("value not supplied! type --help"),
    }
}