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// run-pass
#![allow(dead_code)]
// Test that traits can be implemented for extern types.
#![feature(extern_types)]
extern "C" {
type A;
}
trait Foo {
fn foo(&self) {}
}
impl Foo for A {
fn foo(&self) {}
}
fn assert_foo<T: ?Sized + Foo>() {}
fn use_foo<T: ?Sized + Foo>(x: &dyn Foo) {
x.foo();
}
fn main() {
assert_foo::<A>();
}
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