2 // Test that we will do various size optimizations to enum layout, but
3 // *not* if `#[repr(u8)]` or `#[repr(C)]` is passed. See also #40029.
26 struct StructNewtype<T>(T);
29 struct StructNewtypeC<T>(T);
31 enum EnumNewtype<T> { Variant(T) }
34 enum EnumNewtypeU8<T> { Variant(T) }
37 enum EnumNewtypeC<T> { Variant(T) }
40 assert!(mem::size_of::<Box<i32>>() == mem::size_of::<Nullable<Box<i32>>>());
41 assert!(mem::size_of::<Box<i32>>() < mem::size_of::<NullableU8<Box<i32>>>());
42 assert!(mem::size_of::<Box<i32>>() < mem::size_of::<NullableC<Box<i32>>>());
44 assert!(mem::size_of::<i32>() == mem::size_of::<StructNewtype<i32>>());
45 assert!(mem::size_of::<i32>() == mem::size_of::<StructNewtypeC<i32>>());
47 assert!(mem::size_of::<i32>() == mem::size_of::<EnumNewtype<i32>>());
48 assert!(mem::size_of::<i32>() < mem::size_of::<EnumNewtypeU8<i32>>());
49 assert!(mem::size_of::<i32>() < mem::size_of::<EnumNewtypeC<i32>>());