[rustc.git] / tests / ui / traits / new-solver / param-candidate-doesnt-shadow-project.rs

// compile-flags: -Ztrait-solver=next
// 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() {}
Commit	Line	Data
9ffffee4 FG	1	// compile-flags: -Ztrait-solver=next
	2	// check-pass
	3
	4	trait Foo {
	5	type Assoc;
	6	}
	7
	8	trait Bar {}
	9
	10	impl<T> Foo for T {
	11	type Assoc = i32;
	12	}
	13
	14	impl<T> Bar for T where T: Foo<Assoc = i32> {}
	15
	16	fn require_bar<T: Bar>() {}
	17
	18	fn foo<T: Foo>() {
	19	// Unlike the classic solver, `<T as Foo>::Assoc = _` will still project
	20	// down to `i32` even though there's a param-env candidate here, since we
	21	// don't assemble any param-env projection candidates for `T: Foo` alone.
	22	require_bar::<T>();
	23	}
	24
	25	fn main() {}