99f2977031
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39 lines
1.5 KiB
Plaintext
39 lines
1.5 KiB
Plaintext
error[E0423]: expected value, found trait `SomeTrait`
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--> $DIR/E0033.rs:6:37
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LL | let trait_obj: &dyn SomeTrait = SomeTrait;
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| ^^^^^^^^^ not a value
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error[E0038]: the trait `SomeTrait` cannot be made into an object
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--> $DIR/E0033.rs:6:20
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LL | let trait_obj: &dyn SomeTrait = SomeTrait;
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| ^^^^^^^^^^^^^^ `SomeTrait` cannot be made into an object
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note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety>
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--> $DIR/E0033.rs:2:8
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LL | trait SomeTrait {
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| --------- this trait cannot be made into an object...
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LL | fn foo();
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| ^^^ ...because associated function `foo` has no `self` parameter
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help: consider turning `foo` into a method by giving it a `&self` argument
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LL | fn foo(&self);
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| +++++
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help: alternatively, consider constraining `foo` so it does not apply to trait objects
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LL | fn foo() where Self: Sized;
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| +++++++++++++++++
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error[E0033]: type `&dyn SomeTrait` cannot be dereferenced
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--> $DIR/E0033.rs:10:9
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LL | let &invalid = trait_obj;
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| ^^^^^^^^ type `&dyn SomeTrait` cannot be dereferenced
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error: aborting due to 3 previous errors
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Some errors have detailed explanations: E0033, E0038, E0423.
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For more information about an error, try `rustc --explain E0033`.
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