snakepipe 2.2.1

A snake game based on stdin/stdout following unix philosophy
Documentation 
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use serde::Serialize;

#[derive(Debug, Clone, PartialEq, Serialize)]
pub struct Position {
    pub x: i32,
    pub y: i32,
}

impl Position {
    pub fn move_to_dir(&mut self, dir: Direction) {
        match dir {
            Direction::Up => self.y -= 1,
            Direction::Down => self.y += 1,
            Direction::Left => self.x -= 1,
            Direction::Right => self.x += 1,
        }
    }
}

#[derive(Debug, Copy, Clone, PartialEq, Serialize)]
#[serde(rename_all = "lowercase")]
pub enum Direction {
    Up,
    Right,
    Down,
    Left,
}

impl Direction {
    pub fn opposite(&self) -> Direction {
        match *self {
            Direction::Up => Direction::Down,
            Direction::Right => Direction::Left,
            Direction::Down => Direction::Up,
            Direction::Left => Direction::Right,
        }
    }
}