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
|
error: invalid `?` in type
--> $DIR/infinite-assoc.rs:12:39
|
LL | struct A((A, <S as Trait>::T<NOT_EXIST?>));
| ^ `?` is only allowed on expressions, not types
|
help: if you meant to express that the type might not contain a value, use the `Option` wrapper type
|
LL - struct A((A, <S as Trait>::T<NOT_EXIST?>));
LL + struct A((A, <S as Trait>::T<Option<NOT_EXIST>>));
|
error[E0072]: recursive type `A` has infinite size
--> $DIR/infinite-assoc.rs:12:1
|
LL | struct A((A, <S as Trait>::T<NOT_EXIST?>));
| ^^^^^^^^ - recursive without indirection
|
help: insert some indirection (e.g., a `Box`, `Rc`, or `&`) to break the cycle
|
LL | struct A((Box<A>, <S as Trait>::T<NOT_EXIST?>));
| ++++ +
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0072`.
|
