mirror of https://github.com/rust-lang/rust
40 lines
1.4 KiB
Plaintext
40 lines
1.4 KiB
Plaintext
error[E0308]: mismatched types
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--> $DIR/issue-77179.rs:9:5
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LL | type Pointer<T> = impl std::ops::Deref<Target = T>;
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| -------------------------------- the expected opaque type
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LL |
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LL | fn test() -> Pointer<_> {
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| ---------- expected `Pointer<_>` because of return type
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LL |
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LL | Box::new(1)
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| ^^^^^^^^^^^ expected opaque type, found `Box<{integer}>`
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= note: expected opaque type `Pointer<_>`
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found struct `Box<{integer}>`
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note: this item must have the opaque type in its signature in order to be able to register hidden types
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--> $DIR/issue-77179.rs:7:4
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LL | fn test() -> Pointer<_> {
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| ^^^^
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error[E0121]: the placeholder `_` is not allowed within types on item signatures for return types
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--> $DIR/issue-77179.rs:7:22
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LL | fn test() -> Pointer<_> {
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| ^ not allowed in type signatures
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error[E0121]: the placeholder `_` is not allowed within types on item signatures for functions
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--> $DIR/issue-77179.rs:18:25
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LL | fn bar() -> Pointer<_>;
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| ^
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| |
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| not allowed in type signatures
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| help: use type parameters instead: `T`
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error: aborting due to 3 previous errors
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Some errors have detailed explanations: E0121, E0308.
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For more information about an error, try `rustc --explain E0121`.
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