实际应该要这样

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👇
hyyzzz111: 不用和他绕，’b直接干掉

不用和他绕，’b直接干掉

https://www.rustexplorer.com/b#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

谢大哥，让我有白嫖知识的机会

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👇
Bai-Jinlin: 敢情面试的是我们是吧

进步了就行哈

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👇
bestgopher: 面试官看到了，你面试无了

面试官看到了，你面试无了

敢情面试的是我们是吧

#[derive(Debug)]
struct Struct<'a, 'b> {
    field_a: Option<&'a ()>,
    field_b: fn(&'b ()),
}

impl<'a, 'b> Struct<'a, 'b> {
    fn new(data: &'a (), func: fn(&'b ())) -> Self {
        Self {
            field_a: Some(data),
            field_b: func,
        }
    }
}

trait TraitAssociatedLifetime<'a> {
    type AssociatedType<'x>
    where
        Self: 'x + 'a;
    fn get_inner_fn(&mut self) -> (Self::AssociatedType<'a>, &'a ());
}

impl<'a, 'b> TraitAssociatedLifetime<'a> for Struct<'a, 'b>
where
    'a: 'b,
{
    type AssociatedType<'x> = fn(&'x ())
    where
    Self: 'x + 'a;

    fn get_inner_fn(&mut self) -> (Self::AssociatedType<'a>, &'a ())
    where
        'b: 'a,
    {
        (self.field_b, self.field_a.unwrap())
    }
}

fn function<'a>(_: &'a ()) {}

fn main() {
    {
        let empty = ();
        let mut obj = Struct::new(&empty, function);
        let (func, data) = obj.get_inner_fn();
        println!("{:#?}", obj);
        func(data);
    }
    println!("execute `cargo run` if you have completed")
}