src/test/ui/traits/coercion-generic-bad.rs

   1 struct Struct {
   2     person: &'static str
   3 }
   4
   5 trait Trait<T> {
   6     fn f(&self, x: T);
   7 }
   8
   9 impl Trait<&'static str> for Struct {
  10     fn f(&self, x: &'static str) {
  11         println!("Hello, {}!", x);
  12     }
  13 }
  14
  15 fn main() {
  16     let s: Box<dyn Trait<isize>> = Box::new(Struct { person: "Fred" });
  17     //~^ ERROR `Struct: Trait<isize>` is not satisfied
  18     s.f(1);
  19 }