mirror of https://github.com/rust-lang/rust
52 lines
2.0 KiB
Plaintext
52 lines
2.0 KiB
Plaintext
warning: trait objects without an explicit `dyn` are deprecated
|
|
--> $DIR/not-on-bare-trait.rs:7:12
|
|
|
|
|
LL | fn foo(_x: Foo + Send) {
|
|
| ^^^^^^^^^^
|
|
|
|
|
= warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
|
|
= note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
|
|
= note: `#[warn(bare_trait_objects)]` on by default
|
|
help: if this is an object-safe trait, use `dyn`
|
|
|
|
|
LL | fn foo(_x: dyn Foo + Send) {
|
|
| +++
|
|
|
|
error[E0277]: the size for values of type `(dyn Foo + Send + 'static)` cannot be known at compilation time
|
|
--> $DIR/not-on-bare-trait.rs:7:8
|
|
|
|
|
LL | fn foo(_x: Foo + Send) {
|
|
| ^^ doesn't have a size known at compile-time
|
|
|
|
|
= help: the trait `Sized` is not implemented for `(dyn Foo + Send + 'static)`
|
|
= help: unsized fn params are gated as an unstable feature
|
|
help: you can use `impl Trait` as the argument type
|
|
|
|
|
LL | fn foo(_x: impl Foo + Send) {
|
|
| ++++
|
|
help: function arguments must have a statically known size, borrowed types always have a known size
|
|
|
|
|
LL | fn foo(_x: &(dyn Foo + Send)) {
|
|
| +++++ +
|
|
|
|
error[E0277]: the size for values of type `(dyn Foo + Send + 'static)` cannot be known at compilation time
|
|
--> $DIR/not-on-bare-trait.rs:12:8
|
|
|
|
|
LL | fn bar(_x: (dyn Foo + Send)) {
|
|
| ^^ doesn't have a size known at compile-time
|
|
|
|
|
= help: the trait `Sized` is not implemented for `(dyn Foo + Send + 'static)`
|
|
= help: unsized fn params are gated as an unstable feature
|
|
help: you can use `impl Trait` as the argument type
|
|
|
|
|
LL | fn bar(_x: (impl Foo + Send)) {
|
|
| ~~~~
|
|
help: function arguments must have a statically known size, borrowed types always have a known size
|
|
|
|
|
LL | fn bar(_x: (&(dyn Foo + Send))) {
|
|
| ++ +
|
|
|
|
error: aborting due to 2 previous errors; 1 warning emitted
|
|
|
|
For more information about this error, try `rustc --explain E0277`.
|