src/test/ui/wf/wf-convert-unsafe-trait-obj.rs

   1 // Check that we do not allow casts or coercions
   2 // to object unsafe trait objects by ref
   3
   4 #![feature(object_safe_for_dispatch)]
   5
   6 trait Trait: Sized {}
   7
   8 struct S;
   9
  10 impl Trait for S {}
  11
  12 fn takes_trait(t: &dyn Trait) {}
  13
  14 fn main() {
  15     &S as &dyn Trait; //~ ERROR E0038
  16     let t: &dyn Trait = &S; //~ ERROR E0038
  17     takes_trait(&S); //~ ERROR E0038
  18 }