Rust 如何捕获可变变量？

如何捕获可变变量

我也尝试过使用这些函数和方法，但后来一切都崩溃了，因为它试图将自己移动到闭包中，就像

struct Level{
    i_vec: ~[int]
}
pub struct GameManager{
    lvl: Level
}
impl GameManager {
    pub fn new() -> GameManager{
        GameManager {lvl: Level{i_vec: ~[]}}
    }
    pub fn new_game(f: ~fn()) {
        do spawn {
            f();
        }
    }
    pub fn default_game_loop(lvl: &Level ,f: &fn() ){
        loop {
            f();
            break;
        }
    }
}
fn main() {
    let mut gm = GameManager::new();
    do GameManager::new_game(){
        // I know I could move "gm" here, but I would like
        // to know how to capture mutable variables.
        do GameManager::default_game_loop(&gm.lvl){

        }
    }

}
/*
/home/maik/source/test.rs:28:43: 28:45 error: mutable variables cannot be implicitly captured
/home/maik/source/test.rs:28         do GameManager::default_game_loop(&gm.lvl){
                                                                        ^~
error: aborting due to previous error
[Finished in 0.2s with exit code 101]
*/

do gm.default_game_loop(){
    let level = &gm.lvl;    
}

是否有我可以使用的自参数？因为通用汽车公司本身应该在关闭时可用

struct Level{
    i_vec: ~[int]
}
pub struct GameManager{
    lvl: Level
}
impl GameManager {
    pub fn new() -> GameManager{
        GameManager {lvl: Level{i_vec: ~[]}}
    }
    pub fn new_game(f: ~fn()) {
        do spawn {
            f();
        }
    }
    pub fn default_game_loop(lvl: &Level ,f: &fn() ){
        loop {
            f();
            break;
        }
    }
}
fn main() {
    let mut gm = GameManager::new();
    do GameManager::new_game(){
        // I know I could move "gm" here, but I would like
        // to know how to capture mutable variables.
        do GameManager::default_game_loop(&gm.lvl){

        }
    }

}
/*
/home/maik/source/test.rs:28:43: 28:45 error: mutable variables cannot be implicitly captured
/home/maik/source/test.rs:28         do GameManager::default_game_loop(&gm.lvl){
                                                                        ^~
error: aborting due to previous error
[Finished in 0.2s with exit code 101]
*/

do gm.default_game_loop(){
    let level = &gm.lvl;    
}

---

您遇到的问题是无法在两个任务之间直接共享内存。处理此问题的传统方法是将数据移动到线程。下面是一个例子：

do gm.default_game_loop(){
        let level = self.lvl;    
}

使用std:：task；
结构级{
i_vec:~[int]
}
发布结构游戏管理器{
lvl：水平
}
impl游戏管理器{
pub fn new（）->GameManager{
游戏管理器{lvl:Level{i_vec:~[]}
}
pub fn新游戏频道，或通过互斥保护