rust/tests/ui/traits/next-solver/param-candidate-doesnt-shadow-project.rs

26 lines
506 B
Rust

// compile-flags: -Znext-solver
// check-pass
trait Foo {
type Assoc;
}
trait Bar {}
impl<T> Foo for T {
type Assoc = i32;
}
impl<T> Bar for T where T: Foo<Assoc = i32> {}
fn require_bar<T: Bar>() {}
fn foo<T: Foo>() {
// Unlike the classic solver, `<T as Foo>::Assoc = _` will still project
// down to `i32` even though there's a param-env candidate here, since we
// don't assemble any param-env projection candidates for `T: Foo` alone.
require_bar::<T>();
}
fn main() {}