rust/tests/ui/unsized-locals/unsized-exprs.rs
2023-01-11 09:32:08 +00:00

29 lines
573 B
Rust

#![feature(unsized_tuple_coercion, unsized_fn_params)]
struct A<X: ?Sized>(X);
fn udrop<T: ?Sized>(_x: T) {}
fn foo() -> Box<[u8]> {
Box::new(*b"foo")
}
fn tfoo() -> Box<(i32, [u8])> {
Box::new((42, *b"foo"))
}
fn afoo() -> Box<A<[u8]>> {
Box::new(A(*b"foo"))
}
impl std::ops::Add<i32> for A<[u8]> {
type Output = ();
fn add(self, _rhs: i32) -> Self::Output {}
}
fn main() {
udrop::<(i32, [u8])>((42, *foo()));
//~^ERROR E0277
udrop::<A<[u8]>>(A { 0: *foo() });
//~^ERROR E0277
udrop::<A<[u8]>>(A(*foo()));
//~^ERROR E0277
}