| trait Q<T:?Sized> {} | |
| trait Foo where u32: Q<Self> { | |
| fn foo(&self); | |
| } | |
| impl Q<()> for u32 {} | |
| impl Foo for () { | |
| fn foo(&self) { | |
| println!("foo!"); | |
| } | |
| } | |
| fn main() { | |
| let _f: Box<dyn Foo> = //~ ERROR `Foo` cannot be made into an object | |
| Box::new(()); //~ ERROR `Foo` cannot be made into an object | |
| } |