pub fn piece_char(self) -> char {
        match self {
            Player::Black => 'X',
            Player::White => 'O',
        }
    }
/// The piece type indicating this player.
The piece type indicating this player.
The piece type indicating this player .
pub fn piece_char(self) -> char {
        match self {
            Player::Black => 'X',
            Player::White => 'O',
        }
    }
pub fn piece_char ( self ) -> char { match self { Player :: Black => 'X' , Player :: White => 'O' , } }
The piece type indicating this player.
The piece type indicating this player .
self
self