src/test/ui/specialization/deafult-associated-type-bound-1.rs

   1 // Check that we check that default associated types satisfy the required
   2 // bounds on them.
   3
   4 #![feature(specialization)]
   5 //~^ WARNING `specialization` is incomplete
   6
   7 trait X {
   8     type U: Clone;
   9     fn unsafe_clone(&self, x: Option<&Self::U>) {
  10         x.cloned();
  11     }
  12 }
  13
  14 // We cannot normalize `<T as X>::U` to `str` here, because the default could
  15 // be overridden. The error here must therefore be found by a method other than
  16 // normalization.
  17 impl<T> X for T {
  18     default type U = str;
  19     //~^ ERROR the trait bound `str: std::clone::Clone` is not satisfied
  20 }
  21
  22 pub fn main() {
  23     1.unsafe_clone(None);
  24 }