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Sep 17th, 2019
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  1. trait TraitA { type Item: ?Sized; }
  2.  
  3. trait TraitB<T> { }
  4.  
  5. impl<X: TraitA> TraitB<X> for X::Item { }
  6.  
  7. impl TraitA for () {
  8. type Item = dyn TraitB<()>;
  9. }
  10.  
  11. fn main() { }
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