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|
warning: trait objects without an explicit `dyn` are deprecated
--> $DIR/missing-for-type-in-impl.rs:8:6
|
LL | impl Foo<i64> {
| ^^^^^^^^
|
= 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 a dyn-compatible trait, use `dyn`
|
LL | impl dyn Foo<i64> {
| +++
help: you might have intended to implement this trait for a given type
|
LL | impl Foo<i64> for /* Type */ {
| ++++++++++++++
warning: trait objects without an explicit `dyn` are deprecated
--> $DIR/missing-for-type-in-impl.rs:8:6
|
LL | impl Foo<i64> {
| ^^^^^^^^
|
= 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: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
help: if this is a dyn-compatible trait, use `dyn`
|
LL | impl dyn Foo<i64> {
| +++
help: you might have intended to implement this trait for a given type
|
LL | impl Foo<i64> for /* Type */ {
| ++++++++++++++
error[E0038]: the trait `Foo` cannot be made into an object
--> $DIR/missing-for-type-in-impl.rs:8:6
|
LL | impl Foo<i64> {
| ^^^^^^^^ `Foo` cannot be made into an object
|
note: for a trait to be "dyn-compatible" 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>
--> $DIR/missing-for-type-in-impl.rs:4:8
|
LL | trait Foo<T> {
| --- this trait cannot be made into an object...
LL | fn id(me: T) -> T;
| ^^ ...because associated function `id` has no `self` parameter
help: consider turning `id` into a method by giving it a `&self` argument
|
LL | fn id(&self, me: T) -> T;
| ++++++
help: alternatively, consider constraining `id` so it does not apply to trait objects
|
LL | fn id(me: T) -> T where Self: Sized;
| +++++++++++++++++
error[E0277]: the trait bound `i64: Foo<i64>` is not satisfied
--> $DIR/missing-for-type-in-impl.rs:19:19
|
LL | let x: i64 = <i64 as Foo<i64>>::id(10);
| ^^^ the trait `Foo<i64>` is not implemented for `i64`
|
help: this trait has no implementations, consider adding one
--> $DIR/missing-for-type-in-impl.rs:3:1
|
LL | trait Foo<T> {
| ^^^^^^^^^^^^
error: aborting due to 2 previous errors; 2 warnings emitted
Some errors have detailed explanations: E0038, E0277.
For more information about an error, try `rustc --explain E0038`.
|
