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trait X<'a, T>
where
for<'b> T: X<'b, T>,
for<'b> <T as X<'b, T>>::U: Clone,
{
type U: ?Sized;
fn f(x: &<T as X<'_, T>>::U) {
<<T as X<'_, T>>::U>::clone(x);
}
}
impl<S, T> X<'_, T> for (S,) {
//~^ ERROR the trait bound `for<'b> T: X<'b, T>` is not satisfied
type U = str;
}
pub fn main() {
<(i32,) as X<i32>>::f("abc");
//~^ ERROR the trait bound `for<'b> i32: X<'b, i32>` is not satisfied
//~| ERROR the trait bound `for<'b> i32: X<'b, i32>` is not satisfied
//~| ERROR the trait bound `i32: X<'_, i32>` is not satisfied
}
|
