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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-18 02:49:42 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-18 02:49:42 +0000 |
commit | 837b550238aa671a591ccf282dddeab29cadb206 (patch) | |
tree | 914b6b8862bace72bd3245ca184d374b08d8a672 /tests/ui/layout/issue-112048-unsizing-niche.rs | |
parent | Adding debian version 1.70.0+dfsg2-1. (diff) | |
download | rustc-837b550238aa671a591ccf282dddeab29cadb206.tar.xz rustc-837b550238aa671a591ccf282dddeab29cadb206.zip |
Merging upstream version 1.71.1+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/ui/layout/issue-112048-unsizing-niche.rs')
-rw-r--r-- | tests/ui/layout/issue-112048-unsizing-niche.rs | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/tests/ui/layout/issue-112048-unsizing-niche.rs b/tests/ui/layout/issue-112048-unsizing-niche.rs new file mode 100644 index 000000000..23588ba36 --- /dev/null +++ b/tests/ui/layout/issue-112048-unsizing-niche.rs @@ -0,0 +1,30 @@ +// run-pass + +// Check that unsizing does not change which field is considered for niche layout. + +#![feature(offset_of)] +#![allow(dead_code)] + +#[derive(Clone)] +struct WideptrField<T: ?Sized> { + first: usize, + second: usize, + niche: NicheAtEnd, + tail: T, +} + +#[derive(Clone)] +#[repr(C)] +struct NicheAtEnd { + arr: [u8; 7], + b: bool, +} + +type Tail = [bool; 8]; + +fn main() { + assert_eq!( + core::mem::offset_of!(WideptrField<Tail>, niche), + core::mem::offset_of!(WideptrField<dyn Send>, niche) + ); +} |