| DefKind::ImplTraitPlaceholder

DefKind::ForeignMod | DefKind::GlobalAsm => false,

fn bar(self) -> impl Deref<Target = impl Sized>;

fn bar(self) -> &'static () { &() }

extern crate rpitit;

fn main() {

let _: &dyn rpitit::Foo = todo!();

//~^ ERROR the trait `Foo` cannot be made into an object

error[E0038]: the trait `Foo` cannot be made into an object

--> $DIR/foreign-dyn-error.rs:6:12

|

LL | let _: &dyn rpitit::Foo = todo!();

| ^^^^^^^^^^^^^^^^ `Foo` 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/auxiliary/rpitit.rs:8:21

|

LL | fn bar(self) -> impl Deref<Target = impl Sized>;

| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait cannot be made into an object because method `bar` references an `impl Trait` type in its return type

error: aborting due to previous error

For more information about this error, try `rustc --explain E0038`.

use rpitit::{Foo, Foreign};

impl Foo for Local {

fn bar(self) -> Arc<String> { Arc::new(String::new()) }

let &() = Foreign.bar();

let x: Arc<String> = Local.bar();