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#[derive(Debug, Clone, Copy)]
pub enum Direction {
    North,
    East,
    South,
    West,
    Still,
}

impl Direction {
    pub fn opposite(&self) -> Direction {
        match self {
            Direction::North => Direction::South,
            Direction::East => Direction::West,
            Direction::South => Direction::North,
            Direction::West => Direction::East,
            Direction::Still => Direction::Still,
        }
    }

    pub fn all() -> Vec<Direction> {
        Direction::all4()
    }

    pub fn all4() -> Vec<Direction> {
        vec![
            Direction::North,
            Direction::East,
            Direction::South,
            Direction::West,
        ]
    }

    pub fn all5() -> Vec<Direction> {
        vec![
            Direction::North,
            Direction::East,
            Direction::South,
            Direction::West,
            Direction::Still,
        ]
    }
}