mirror of https://github.com/rust-lang/rust
64 lines
2.7 KiB
Plaintext
64 lines
2.7 KiB
Plaintext
error[E0308]: mismatched types
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--> $DIR/return-impl-trait-bad.rs:5:5
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LL | fn bad_echo<T>(_t: T) -> T {
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| - - expected `T` because of return type
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| expected this type parameter
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LL | "this should not suggest impl Trait"
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected type parameter `T`, found `&str`
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= note: expected type parameter `T`
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found reference `&'static str`
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= note: the caller chooses a type for `T` which can be different from `&'static str`
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error[E0308]: mismatched types
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--> $DIR/return-impl-trait-bad.rs:9:5
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LL | fn bad_echo_2<T: Trait>(_t: T) -> T {
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| - - expected `T` because of return type
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| |
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| expected this type parameter
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LL | "this will not suggest it, because that would probably be wrong"
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected type parameter `T`, found `&str`
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= note: expected type parameter `T`
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found reference `&'static str`
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= note: the caller chooses a type for `T` which can be different from `&'static str`
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error[E0308]: mismatched types
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--> $DIR/return-impl-trait-bad.rs:17:5
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LL | fn other_bounds_bad<T>() -> T
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| - - expected `T` because of return type
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| expected this type parameter
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...
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LL | "don't suggest this, because Option<T> places additional constraints"
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected type parameter `T`, found `&str`
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= note: expected type parameter `T`
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found reference `&'static str`
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= note: the caller chooses a type for `T` which can be different from `&'static str`
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error[E0308]: mismatched types
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--> $DIR/return-impl-trait-bad.rs:28:5
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LL | fn used_in_trait<T>() -> T
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| - -
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| | |
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| | expected `T` because of return type
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| | help: consider using an impl return type: `impl Send`
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| expected this type parameter
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...
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LL | "don't suggest this, because the generic param is used in the bound."
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected type parameter `T`, found `&str`
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= note: expected type parameter `T`
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found reference `&'static str`
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= note: the caller chooses a type for `T` which can be different from `&'static str`
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error: aborting due to 4 previous errors
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For more information about this error, try `rustc --explain E0308`.
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