我可以在嵌套类型上专门化一个特征吗？

trait MyTrait {
    fn do_something(&self);
}

impl<T> MyTrait for T {
    fn do_something(&self) {
        println!("Default implementation");
    }
}

impl MyTrait for i32 {
    fn do_something(&self) {
        println!("Specialized implementation for i32");
    }
}

fn main() {
    let generic_value = 10;
    let specialized_value: i32 = 20;

    generic_value.do_something(); // 输出：Default implementation
    specialized_value.do_something(); // 输出：Specialized implementation for i32
}