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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:03 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:03 +0000 |
commit | 64d98f8ee037282c35007b64c2649055c56af1db (patch) | |
tree | 5492bcf97fce41ee1c0b1cc2add283f3e66cdab0 /src/test/ui/transmutability/visibility/assume/should_accept_if_dst_has_tricky_unreachable_field.rs | |
parent | Adding debian version 1.67.1+dfsg1-1. (diff) | |
download | rustc-64d98f8ee037282c35007b64c2649055c56af1db.tar.xz rustc-64d98f8ee037282c35007b64c2649055c56af1db.zip |
Merging upstream version 1.68.2+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/test/ui/transmutability/visibility/assume/should_accept_if_dst_has_tricky_unreachable_field.rs')
-rw-r--r-- | src/test/ui/transmutability/visibility/assume/should_accept_if_dst_has_tricky_unreachable_field.rs | 46 |
1 files changed, 0 insertions, 46 deletions
diff --git a/src/test/ui/transmutability/visibility/assume/should_accept_if_dst_has_tricky_unreachable_field.rs b/src/test/ui/transmutability/visibility/assume/should_accept_if_dst_has_tricky_unreachable_field.rs deleted file mode 100644 index ebce8ce87..000000000 --- a/src/test/ui/transmutability/visibility/assume/should_accept_if_dst_has_tricky_unreachable_field.rs +++ /dev/null @@ -1,46 +0,0 @@ -// check-pass -//! Unless visibility is assumed, a transmutation should be rejected if the -//! destination type contains an unreachable field (e.g., a public field with a -//! private type). (This rule is distinct from type privacy, which still may -//! forbid naming such types.) -//! -//! This test exercises a tricky-to-implement instance of this principle: the -//! "pub-in-priv trick". In the below example, the type `dst::private::Zst` is -//! unreachable from `Context`. - -#![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(in super) struct Zst; - - #[repr(C)] pub(in super) struct Src { - pub(in super) field: Zst, - } -} - -mod dst { - mod private { - #[repr(C)] pub struct Zst; // <- unreachable type - } - - #[repr(C)] pub(in super) struct Dst { - pub(in super) field: private::Zst, - } -} - -fn test() { - struct Context; - assert::is_transmutable::<src::Src, dst::Dst, Context>(); -} |