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0531ce1d 1error[E0666]: nested `impl Trait` is not allowed
0731742a 2 --> $DIR/nested_impl_trait.rs:5:56
0531ce1d
XL
3 |
4LL | fn bad_in_ret_position(x: impl Into<u32>) -> impl Into<impl Debug> { x }
5 | ----------^^^^^^^^^^-
6 | | |
7 | | nested `impl Trait` here
8 | outer `impl Trait`
9
10error[E0666]: nested `impl Trait` is not allowed
5e7ed085 11 --> $DIR/nested_impl_trait.rs:9:42
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XL
12 |
13LL | fn bad_in_fn_syntax(x: fn() -> impl Into<impl Debug>) {}
14 | ----------^^^^^^^^^^-
15 | | |
16 | | nested `impl Trait` here
17 | outer `impl Trait`
18
19error[E0666]: nested `impl Trait` is not allowed
5e7ed085 20 --> $DIR/nested_impl_trait.rs:13:37
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21 |
22LL | fn bad_in_arg_position(_: impl Into<impl Debug>) { }
23 | ----------^^^^^^^^^^-
24 | | |
25 | | nested `impl Trait` here
26 | outer `impl Trait`
27
28error[E0666]: nested `impl Trait` is not allowed
5e7ed085 29 --> $DIR/nested_impl_trait.rs:18:44
0531ce1d
XL
30 |
31LL | fn bad(x: impl Into<u32>) -> impl Into<impl Debug> { x }
32 | ----------^^^^^^^^^^-
33 | | |
34 | | nested `impl Trait` here
35 | outer `impl Trait`
36
5099ac24 37error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `fn` pointer return
5e7ed085 38 --> $DIR/nested_impl_trait.rs:9:32
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39 |
40LL | fn bad_in_fn_syntax(x: fn() -> impl Into<impl Debug>) {}
41 | ^^^^^^^^^^^^^^^^^^^^^
42
5099ac24 43error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `Fn` trait return
5e7ed085 44 --> $DIR/nested_impl_trait.rs:27:42
0531ce1d
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45 |
46LL | fn allowed_in_ret_type() -> impl Fn() -> impl Into<u32> {
47 | ^^^^^^^^^^^^^^
48
5e7ed085
FG
49error[E0277]: the trait bound `impl Debug: From<impl Into<u32>>` is not satisfied
50 --> $DIR/nested_impl_trait.rs:5:46
51 |
52LL | fn bad_in_ret_position(x: impl Into<u32>) -> impl Into<impl Debug> { x }
53 | ^^^^^^^^^^^^^^^^^^^^^ the trait `From<impl Into<u32>>` is not implemented for `impl Debug`
54 |
04454e1e 55 = help: the trait `Into<U>` is implemented for `T`
5e7ed085
FG
56 = note: required because of the requirements on the impl of `Into<impl Debug>` for `impl Into<u32>`
57
58error[E0277]: the trait bound `impl Debug: From<impl Into<u32>>` is not satisfied
59 --> $DIR/nested_impl_trait.rs:18:34
60 |
61LL | fn bad(x: impl Into<u32>) -> impl Into<impl Debug> { x }
62 | ^^^^^^^^^^^^^^^^^^^^^ the trait `From<impl Into<u32>>` is not implemented for `impl Debug`
63 |
04454e1e 64 = help: the trait `Into<U>` is implemented for `T`
5e7ed085
FG
65 = note: required because of the requirements on the impl of `Into<impl Debug>` for `impl Into<u32>`
66
67error: aborting due to 8 previous errors
0531ce1d 68
5e7ed085
FG
69Some errors have detailed explanations: E0277, E0562, E0666.
70For more information about an error, try `rustc --explain E0277`.