tests/ui/issues/issue-15155.rs

   1 // run-pass
   2 trait TraitWithSend: Send {}
   3 trait IndirectTraitWithSend: TraitWithSend {}
   4
   5 // Check struct instantiation (Box<TraitWithSend> will only have Send if TraitWithSend has Send)
   6 #[allow(dead_code)]
   7 struct Blah { x: Box<dyn TraitWithSend> }
   8 impl TraitWithSend for Blah {}
   9
  10 // Struct instantiation 2-levels deep
  11 #[allow(dead_code)]
  12 struct IndirectBlah { x: Box<dyn IndirectTraitWithSend> }
  13 impl TraitWithSend for IndirectBlah {}
  14 impl IndirectTraitWithSend for IndirectBlah {}
  15
  16 fn test_trait<T: Send + ?Sized>() { println!("got here!") }
  17
  18 fn main() {
  19     test_trait::<dyn TraitWithSend>();
  20     test_trait::<dyn IndirectTraitWithSend>();
  21 }