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use std::ops::Deref;
trait MyTrait: Deref<Target = u32> {}
struct MyStruct(u32);
impl MyTrait for MyStruct {}
impl Deref for MyStruct {
type Target = u32;
fn deref(&self) -> &Self::Target {
&self.0
}
}
fn get_concrete_value(i: u32) -> MyStruct {
MyStruct(i)
}
fn get_boxed_value(i: u32) -> Box<dyn MyTrait> {
Box::new(get_concrete_value(i))
}
fn main() {
let v = [1, 2, 3]
.iter()
.map(|i| get_boxed_value(*i))
.collect::<Vec<_>>();
let el = &v[0];
for _ in v {
//~^ ERROR cannot move out of `v` because it is borrowed
println!("{}", ***el > 0);
}
}
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