summaryrefslogtreecommitdiffstats
path: root/tests/ui/unsized-locals/autoderef.rs
blob: 5dd5898c12e5c2d44979fb44ebe9772cfebdc09b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
// run-pass

#![allow(incomplete_features)]
#![feature(unsized_locals, unsized_fn_params)]

pub trait Foo {
    fn foo(self) -> String;
}

impl Foo for [char] {
    fn foo(self) -> String {
        self.iter().collect()
    }
}

impl Foo for str {
    fn foo(self) -> String {
        self.to_owned()
    }
}

impl Foo for dyn FnMut() -> String {
    fn foo(mut self) -> String {
        self()
    }
}

fn main() {
    let x = *(Box::new(['h', 'e', 'l', 'l', 'o']) as Box<[char]>);
    assert_eq!(&x.foo() as &str, "hello");

    let x = Box::new(['h', 'e', 'l', 'l', 'o']) as Box<[char]>;
    assert_eq!(&x.foo() as &str, "hello");

    let x = "hello".to_owned().into_boxed_str();
    assert_eq!(&x.foo() as &str, "hello");

    let x = *("hello".to_owned().into_boxed_str());
    assert_eq!(&x.foo() as &str, "hello");

    let x = "hello".to_owned().into_boxed_str();
    assert_eq!(&x.foo() as &str, "hello");

    let x = *(Box::new(|| "hello".to_owned()) as Box<dyn FnMut() -> String>);
    assert_eq!(&x.foo() as &str, "hello");

    let x = Box::new(|| "hello".to_owned()) as Box<dyn FnMut() -> String>;
    assert_eq!(&x.foo() as &str, "hello");
}