mirror of https://github.com/rust-lang/rust
40 lines
1.7 KiB
Plaintext
40 lines
1.7 KiB
Plaintext
error: trait objects without an explicit `dyn` are deprecated
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--> $DIR/bare-trait-dont-suggest-dyn.rs:6:33
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LL | fn ord_prefer_dot(s: String) -> Ord {
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| ^^^
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= warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
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= note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
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note: the lint level is defined here
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--> $DIR/bare-trait-dont-suggest-dyn.rs:5:9
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LL | #![deny(bare_trait_objects)]
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| ^^^^^^^^^^^^^^^^^^
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help: if this is an object-safe trait, use `dyn`
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LL | fn ord_prefer_dot(s: String) -> dyn Ord {
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| +++
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error[E0038]: the trait `Ord` cannot be made into an object
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--> $DIR/bare-trait-dont-suggest-dyn.rs:6:33
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LL | fn ord_prefer_dot(s: String) -> Ord {
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| ^^^ `Ord` 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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--> $SRC_DIR/core/src/cmp.rs:LL:COL
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= note: the trait cannot be made into an object because it uses `Self` as a type parameter
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::: $SRC_DIR/core/src/cmp.rs:LL:COL
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= note: the trait cannot be made into an object because it uses `Self` as a type parameter
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help: consider using an opaque type instead
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LL | fn ord_prefer_dot(s: String) -> impl Ord {
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| ++++
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error: aborting due to 2 previous errors
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For more information about this error, try `rustc --explain E0038`.
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