| // check-pass |
| //! If visibility is assumed, a transmutation should be accepted even if the |
| //! destination type contains a private field. |
| |
| #![crate_type = "lib"] |
| #![feature(transmutability)] |
| #![allow(dead_code)] |
| |
| mod assert { |
| use std::mem::{Assume, BikeshedIntrinsicFrom}; |
| |
| pub fn is_transmutable<Src, Dst, Context>() |
| where |
| Dst: BikeshedIntrinsicFrom<Src, Context, { Assume::SAFETY }> |
| // safety IS assumed --------------------^^^^^^^^^^^^^^^^^^ |
| {} |
| } |
| |
| mod src { |
| #[repr(C)] pub(self) struct Zst; |
| |
| #[repr(C)] pub(in super) struct Src { |
| pub(self) field: Zst, |
| } |
| } |
| |
| mod dst { |
| #[repr(C)] pub(in super) struct Zst; |
| |
| #[repr(C)] pub(in super) struct Dst { |
| pub(self) field: Zst, // <- private field |
| } |
| } |
| |
| fn test() { |
| struct Context; |
| assert::is_transmutable::<src::Src, dst::Dst, Context>(); |
| } |