rust/tests/ui/issues/issue-11267.rs
2024-02-16 20:02:50 +00:00

20 lines
345 B
Rust

//@ run-pass
// Tests that unary structs can be mutably borrowed.
struct Empty;
trait T<U> {
fn next(&mut self) -> Option<U>;
}
impl T<isize> for Empty {
fn next(&mut self) -> Option<isize> { None }
}
fn do_something_with(a : &mut dyn T<isize>) {
println!("{:?}", a.next())
}
pub fn main() {
do_something_with(&mut Empty);
}