blob: 088f69b09f704406a1574f8207a5f5fa8e89dcd0 (
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
50
51
52
|
error[E0107]: missing generics for associated type `SuperTrait::SubType`
--> $DIR/issue-76535.rs:39:33
|
LL | let sub: Box<dyn SuperTrait<SubType = SubStruct>> = Box::new(SuperStruct::new(0));
| ^^^^^^^ expected 1 lifetime argument
|
note: associated type defined here, with 1 lifetime parameter: `'a`
--> $DIR/issue-76535.rs:9:10
|
LL | type SubType<'a>: SubTrait where Self: 'a;
| ^^^^^^^ --
help: add missing lifetime argument
|
LL | let sub: Box<dyn SuperTrait<SubType<'a> = SubStruct>> = Box::new(SuperStruct::new(0));
| ~~~~~~~~~~~
error[E0038]: the trait `SuperTrait` cannot be made into an object
--> $DIR/issue-76535.rs:39:14
|
LL | let sub: Box<dyn SuperTrait<SubType = SubStruct>> = Box::new(SuperStruct::new(0));
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `SuperTrait` cannot be made into an object
|
note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety>
--> $DIR/issue-76535.rs:9:10
|
LL | pub trait SuperTrait {
| ---------- this trait cannot be made into an object...
LL | type SubType<'a>: SubTrait where Self: 'a;
| ^^^^^^^ ...because it contains the generic associated type `SubType`
= help: consider moving `SubType` to another trait
error[E0038]: the trait `SuperTrait` cannot be made into an object
--> $DIR/issue-76535.rs:39:57
|
LL | let sub: Box<dyn SuperTrait<SubType = SubStruct>> = Box::new(SuperStruct::new(0));
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `SuperTrait` cannot be made into an object
|
note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety>
--> $DIR/issue-76535.rs:9:10
|
LL | pub trait SuperTrait {
| ---------- this trait cannot be made into an object...
LL | type SubType<'a>: SubTrait where Self: 'a;
| ^^^^^^^ ...because it contains the generic associated type `SubType`
= help: consider moving `SubType` to another trait
= note: required for `Box<SuperStruct>` to implement `CoerceUnsized<Box<dyn SuperTrait<SubType = SubStruct<'_>>>>`
= note: required by cast to type `Box<dyn SuperTrait<SubType = SubStruct<'_>>>`
error: aborting due to 3 previous errors
Some errors have detailed explanations: E0038, E0107.
For more information about an error, try `rustc --explain E0038`.
|
