1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21

/// This enum represents the two players. The first player is always `Black`.
///
/// When displaying boards we use the symbol ● for Black and ○ for White.
/// Note that when using a dark theme, apparent colors might be reversed.
#[derive(Copy, Clone, Debug, PartialEq, Eq, Hash)]
pub enum Color {
    /// Needs to connect top to bottom. Always starts the game.
    Black,
    /// Needs to connect left to right.
    White,
}

impl Color {
    /// Return the color of the other player.
    pub fn opponent_color(&self) -> Self {
        match self {
            Color::Black => Color::White,
            Color::White => Color::Black,
        }
    }
}