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error[E0038]: the trait `NonObjectSafe1` cannot be made into an object
--> $DIR/feature-gate-object_safe_for_dispatch.rs:18:39
|
LL | fn takes_non_object_safe_ref<T>(obj: &dyn NonObjectSafe1) {
| ^^^^^^^^^^^^^^^^^^ `NonObjectSafe1` cannot be made into an object
|
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>
--> $DIR/feature-gate-object_safe_for_dispatch.rs:4:23
|
LL | trait NonObjectSafe1: Sized {}
| -------------- ^^^^^ ...because it requires `Self: Sized`
| |
| this trait cannot be made into an object...
error[E0038]: the trait `NonObjectSafe2` cannot be made into an object
--> $DIR/feature-gate-object_safe_for_dispatch.rs:22:45
|
LL | fn return_non_object_safe_ref() -> &'static dyn NonObjectSafe2 {
| ^^^^^^^^^^^^^^^^^^ `NonObjectSafe2` cannot be made into an object
|
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>
--> $DIR/feature-gate-object_safe_for_dispatch.rs:7:8
|
LL | trait NonObjectSafe2 {
| -------------- this trait cannot be made into an object...
LL | fn static_fn() {}
| ^^^^^^^^^ ...because associated function `static_fn` has no `self` parameter
help: consider turning `static_fn` into a method by giving it a `&self` argument
|
LL | fn static_fn(&self) {}
| +++++
help: alternatively, consider constraining `static_fn` so it does not apply to trait objects
|
LL | fn static_fn() where Self: Sized {}
| +++++++++++++++++
error[E0038]: the trait `NonObjectSafe3` cannot be made into an object
--> $DIR/feature-gate-object_safe_for_dispatch.rs:27:39
|
LL | fn takes_non_object_safe_box(obj: Box<dyn NonObjectSafe3>) {
| ^^^^^^^^^^^^^^^^^^ `NonObjectSafe3` cannot be made into an object
|
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>
--> $DIR/feature-gate-object_safe_for_dispatch.rs:11:8
|
LL | trait NonObjectSafe3 {
| -------------- this trait cannot be made into an object...
LL | fn foo<T>(&self);
| ^^^ ...because method `foo` has generic type parameters
= help: consider moving `foo` to another trait
error[E0038]: the trait `NonObjectSafe4` cannot be made into an object
--> $DIR/feature-gate-object_safe_for_dispatch.rs:31:47
|
LL | fn return_non_object_safe_rc() -> std::rc::Rc<dyn NonObjectSafe4> {
| ^^^^^^^^^^^^^^^^^^ `NonObjectSafe4` cannot be made into an object
|
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>
--> $DIR/feature-gate-object_safe_for_dispatch.rs:15:22
|
LL | trait NonObjectSafe4 {
| -------------- this trait cannot be made into an object...
LL | fn foo(&self, s: &Self);
| ^^^^^ ...because method `foo` references the `Self` type in this parameter
= help: consider moving `foo` to another trait
error[E0038]: the trait `NonObjectSafe1` cannot be made into an object
--> $DIR/feature-gate-object_safe_for_dispatch.rs:38:16
|
LL | impl Trait for dyn NonObjectSafe1 {}
| ^^^^^^^^^^^^^^^^^^ `NonObjectSafe1` cannot be made into an object
|
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>
--> $DIR/feature-gate-object_safe_for_dispatch.rs:4:23
|
LL | trait NonObjectSafe1: Sized {}
| -------------- ^^^^^ ...because it requires `Self: Sized`
| |
| this trait cannot be made into an object...
error: aborting due to 5 previous errors
For more information about this error, try `rustc --explain E0038`.
|
