函数指针 Vec 是可以实现的，但是不知道如何实现闭包 Vec 。type Bibao = dyn Fn(String)->String + 'static; pub fn close_test4(){ let a = "456"; let b1: Bibao = move |mut s:String|{ s.push_str(a); s }; let mut v = Vec::new(); op1(b1,&v); v.get(0)(String::from("123")); } fn op1<T:Fn(String) ->String>(t:T,mut v:&Vec<T>){ v.push(t); } 报错：expected trait object `dyn std::ops::Fn`, found closure 求大佬指点。