Advent of Code helper

This crate provides a macro to generate a handful main for your advent of code participation. The intention is to provide something similar to cargo-aoc through a much simple code base.

Currently this will only provide a few benefits:

• a somewhat pretty orchestration of your solutions
• automatic download and loading of your input files
• generation of criterion benchmarks

Usage

The generator and solutions for a given day must be implemented in a module called dayX. Then you can simply invoke the aoc_main::main! macro in your main.rs:

```rust mod day1 { pub fn generator(input: &str) -> Vec { input .lines() .map(|line| line.parse().unwrap()) .collect() }

pub fn part_1(input: &[u64]) -> u64 {
    input.iter().map(|&mass| mass / 3 - 2).sum()
}

pub fn part_2(input: &[u64]) -> u64 {
    fn total_needed_mass(obj: u64) -> u64 {
        if obj < 9 {
            0
        } else {
            let obj_mass = obj / 3 - 2;
            obj_mass + total_needed_mass(obj_mass)
        }
    }

    input.iter().copied().map(total_needed_mass).sum()
}

}

mod day2; mod day3;

aocmain::main! { year 2019; day1 : generator => part1, part2; day2 : generator => part1, part2, part2optimized; day3 => part1, part_2; // no generator, a &str is passed } ```

Then you can simply run cargo run!

Note that your solutions must take a borrowed version of the generator's output. Also, the generator can output a structure that contains borrowed data from the original input file.

Benchmarks

You can run Criterion benchmarks by running cargo run --release -- --bench, but first you need to enable the bench feature in your cargo.toml:

toml [dependencies] aoc-main = { version = "*", features = ["bench"] }

Fetching your AOC token

When the command line asks you for your session token, you can apply the following procedure (quoted from cargo-aoc):

• Firefox: "Storage" tab, Cookies, and copy the "Value" field of the session cookie.
• Google Chrome / Chromium: "Application" tab, Cookies, and copy the "Value" field of the session cookie.

If you wish to change or forget your connection token, you will have to remove aoc in your config directory (eg. $HOME/.config/aoc for linux users).