blob: fe4802c9b3a472d34f114211d637b5e3019363b3 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
|
error[E0038]: the trait `Foo` is not dyn compatible
--> $DIR/arbitrary-self-types-dyn-incompatible.rs:29:39
|
LL | fn foo(self: &Rc<Self>) -> usize;
| --------- help: consider changing method `foo`'s `self` parameter to be `&self`: `&Self`
...
LL | let x = Rc::new(5usize) as Rc<dyn Foo>;
| ^^^ `Foo` is not dyn compatible
|
note: for a trait to be dyn compatible it needs to allow building a vtable
for more information, visit <https://doc.rust-lang.org/reference/items/traits.html#dyn-compatibility>
--> $DIR/arbitrary-self-types-dyn-incompatible.rs:4:18
|
LL | trait Foo {
| --- this trait is not dyn compatible...
LL | fn foo(self: &Rc<Self>) -> usize;
| ^^^^^^^^^ ...because method `foo`'s `self` parameter cannot be dispatched on
= help: only type `usize` implements `Foo`; consider using it directly instead.
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0038`.
|
