306         T: Sized => Immutable for Box<T>
336         T => TryFromBytes for Option<Box<T>>; |c| pointer::is_zeroed(c)
341         T => FromZeros for Option<Box<T>>
1401             fn with_passing_test_cases<F: Fn(Box<ReadOnly<Self>>)>(f: F);  in test_impls()
1406             fn with_passing_test_cases<F: Fn(Box<ReadOnly<Self>>)>(f: F) {  in test_impls()
1419                 f(Box::new(ffs));  in test_impls()
1429                         fn with_passing_test_cases<F: Fn(Box<ReadOnly<Self>>)>(f: F) {  in test_impls()
1431                             f(Box::new(ReadOnly::new(None)));  in test_impls()
1469                 fn with_passing_test_cases<F: Fn(Box<ReadOnly<Self>>)>(_f: F) {  in test_impls()
1471                         let bx = Box::<Self>::from($success_case);  in test_impls()
1472                         let ro: Box<ReadOnly<_>> = {  in test_impls()
1473                             let raw = Box::into_raw(bx);  in test_impls()
1477                             unsafe { Box::from_raw(raw as *mut _) }  in test_impls()
1493             Box<UnsafeCell<NotZerocopy>>,  in test_impls()
1505                 Box::new($e)  in test_impls()
1724                             Option<Box<UnsafeCell<NotZerocopy>>>,  in test_impls()
1759                             Option<Box<UnsafeCell<NotZerocopy>>>,  in test_impls()
2221 …assert_impls!(Option<Box<UnsafeCell<NotZerocopy>>>: KnownLayout, Immutable, TryFromBytes, FromZero…  in test_impls()
2222 …assert_impls!(Option<Box<[UnsafeCell<NotZerocopy>]>>: KnownLayout, !Immutable, !TryFromBytes, !Fro…  in test_impls()