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

#[macro_use]
extern crate clap;

mod day_1;
mod day_2;
mod day_3;
mod day_4;

mod puzzle;
use crate::puzzle::options::Options;
use crate::puzzle::traits::{Create, Solve};

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

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

    let options = Options {
        puzzle: puzzle_number,
        prompt,
    };

    let puzzle: Box<dyn Solve> = match day {
        1 => day_1::Puzzle::new(options),
        2 => day_2::Puzzle::new(options),
        3 => day_3::Puzzle::new(options),
        4 => day_4::Puzzle::new(options),
        e => panic!("unknown day {}", e),
    };

    let res = puzzle.solve();

    println!("{}", res);
}

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