Type Alias Placeholder 

pub type Placeholder<'tcx, T> = Placeholder<TyCtxt<'tcx>, T>;

Aliased Type

pub struct Placeholder<'tcx, T> {
    pub universe: UniverseIndex,
    pub bound: T,
    /* private fields */
}

Fields

universe: UniverseIndex

bound: T

Layout

Note: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.