aoc-rs-2021/src/day_11/parsing.rs

use yap::Tokens;

use crate::parsing::{newline, parse_digit, parse_n};

use super::OctopusGrid;

pub fn parse_octopus_grid(tokens: &mut impl Tokens<Item = char>) -> Option<OctopusGrid> {
    parse_n(
        tokens,
        |t| parse_n(t, |t| parse_digit(t), |_| true),
        |t| newline(t),
    )
    .map(|grid| OctopusGrid { grid })
}