枚举数组，其可能变体包含参考 [重复]

Question

我尝试编写战舰的纸质游戏，其中战场是一个枚举数组。我找不到初始化数组的方法。

enum Tile {
    Water,
    Debris,
    Ship(Rc<Ship>),
}

fn main() {
    let mut a = [[Tile::Water; 10]; 10]; //Tile::Water doesn't implement Copy (the compiler is dumb)
    let mut b: [[Tile; 10]; 10];
    for i in 1..10 {
        for j in 1..10 {
            b[i][j] = Tile::Water;
        }
    } //use of possibly uninitialized b (I'm trying to initialize it)
}

如何做到这一点？我不是为游戏寻找其他解决方案，这只是一个示例。

Answer 1

试试这个：

enum Tile {
    Water,
    Debris,
    Ship(Rc<Ship>),
}

impl Default for Tile {
    fn default() -> Self {
        Tile::Water
    }
}

fn main() {
    let mut b: [[Tile; 10]; 10] = Default::default();
}