Static rustc_lint_defs::builtin::UNUSED_ASSOCIATED_TYPE_BOUNDS

pub static UNUSED_ASSOCIATED_TYPE_BOUNDS: &Lint

The unused_associated_type_bounds lint is emitted when an associated type bound is added to a trait object, but the associated type has a where Self: Sized bound, and is thus unavailable on the trait object anyway.

Example

trait Foo {
    type Bar where Self: Sized;
}
type Mop = dyn Foo<Bar = ()>;

{{produces}}

Explanation

Just like methods with Self: Sized bounds are unavailable on trait objects, associated types can be removed from the trait object.