as_any_min

这是一个非常小的crate，通过允许你轻松地将特质对象向上转换为Any，使与实现了Any特质的特质一起工作变得更加容易。

示例

use core::any::Any;
use as_any_min::AsAny;

struct MyStruct;
trait MyTrait {}
impl MyTrait for MyStruct {}

/* Note that AsAny is automatically implemented for all
    structs that implement Any, so there is no need to
    implement it manually (in fact it won't compile if
    you try to) */

fn main() {
    // my_variable is now a trait object, which is the
    //  main use case for the AsAny trait.
    let my_variable: &dyn MyTrait = &MyStruct;

    let my_any_variable: &dyn Any = my_variable.as_any();
}

不使用AsAny

由于Rust（目前）没有内置的方式从特质对象向上转换为另一个特质（例如Any），这段代码将无法编译。

use core::any::Any;

struct MyStruct;
trait MyTrait {}
impl MyTrait for MyStruct {}

fn main() {
    let my_variable: &dyn MyTrait = &MyStruct;

    let my_any_variable: &dyn Any = my_variable;
}

许可证：MIT