use core::any::TypeId; #[test] fn test_typeid_sized_types() { struct X; struct Y(u32); assert_eq!(TypeId::of::(), TypeId::of::()); assert_eq!(TypeId::of::(), TypeId::of::()); assert!(TypeId::of::() != TypeId::of::()); } #[test] fn test_typeid_unsized_types() { trait Z {} struct X(str); struct Y(dyn Z + 'static); assert_eq!(TypeId::of::(), TypeId::of::()); assert_eq!(TypeId::of::(), TypeId::of::()); assert!(TypeId::of::() != TypeId::of::()); }