rust/tests/ui/traits/next-solver/specialization-unconstrained.rs

23 lines
503 B
Rust

// compile-flags: -Znext-solver
#![feature(specialization)]
//~^ WARN the feature `specialization` is incomplete
// Do not treat the RHS of a projection-goal as an unconstrained `Certainty::Yes` response
// if the impl is still further specializable.
trait Default {
type Id;
}
impl<T> Default for T {
default type Id = T; //~ ERROR type annotations needed
}
fn test<T: Default<Id = U>, U>() {}
fn main() {
test::<u32, ()>();
//~^ ERROR cannot satisfy `<u32 as Default>::Id == ()`
}