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
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
|
error[E0666]: nested `impl Trait` is not allowed
--> $DIR/nested_impl_trait.rs:6:56
|
LL | fn bad_in_ret_position(x: impl Into<u32>) -> impl Into<impl Debug> { x }
| ----------^^^^^^^^^^-
| | |
| | nested `impl Trait` here
| outer `impl Trait`
error[E0666]: nested `impl Trait` is not allowed
--> $DIR/nested_impl_trait.rs:10:42
|
LL | fn bad_in_fn_syntax(x: fn() -> impl Into<impl Debug>) {}
| ----------^^^^^^^^^^-
| | |
| | nested `impl Trait` here
| outer `impl Trait`
error[E0666]: nested `impl Trait` is not allowed
--> $DIR/nested_impl_trait.rs:14:37
|
LL | fn bad_in_arg_position(_: impl Into<impl Debug>) { }
| ----------^^^^^^^^^^-
| | |
| | nested `impl Trait` here
| outer `impl Trait`
error[E0666]: nested `impl Trait` is not allowed
--> $DIR/nested_impl_trait.rs:19:44
|
LL | fn bad(x: impl Into<u32>) -> impl Into<impl Debug> { x }
| ----------^^^^^^^^^^-
| | |
| | nested `impl Trait` here
| outer `impl Trait`
error[E0562]: `impl Trait` is not allowed in `fn` pointer return types
--> $DIR/nested_impl_trait.rs:10:32
|
LL | fn bad_in_fn_syntax(x: fn() -> impl Into<impl Debug>) {}
| ^^^^^^^^^^^^^^^^^^^^^
|
= note: `impl Trait` is only allowed in arguments and return types of functions and methods
error[E0277]: the trait bound `impl Debug: From<impl Into<u32>>` is not satisfied
--> $DIR/nested_impl_trait.rs:6:46
|
LL | fn bad_in_ret_position(x: impl Into<u32>) -> impl Into<impl Debug> { x }
| ^^^^^^^^^^^^^^^^^^^^^ - return type was inferred to be `impl Into<u32>` here
| |
| the trait `From<impl Into<u32>>` is not implemented for `impl Debug`
|
= help: the trait `Into<U>` is implemented for `T`
= note: required for `impl Into<u32>` to implement `Into<impl Debug>`
error[E0277]: the trait bound `impl Debug: From<impl Into<u32>>` is not satisfied
--> $DIR/nested_impl_trait.rs:19:34
|
LL | fn bad(x: impl Into<u32>) -> impl Into<impl Debug> { x }
| ^^^^^^^^^^^^^^^^^^^^^ - return type was inferred to be `impl Into<u32>` here
| |
| the trait `From<impl Into<u32>>` is not implemented for `impl Debug`
|
= help: the trait `Into<U>` is implemented for `T`
= note: required for `impl Into<u32>` to implement `Into<impl Debug>`
error: aborting due to 7 previous errors
Some errors have detailed explanations: E0277, E0562, E0666.
For more information about an error, try `rustc --explain E0277`.
|
