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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:13 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:13 +0000 |
commit | 218caa410aa38c29984be31a5229b9fa717560ee (patch) | |
tree | c54bd55eeb6e4c508940a30e94c0032fbd45d677 /tests/ui/packed/packed-struct-layout.rs | |
parent | Releasing progress-linux version 1.67.1+dfsg1-1~progress7.99u1. (diff) | |
download | rustc-218caa410aa38c29984be31a5229b9fa717560ee.tar.xz rustc-218caa410aa38c29984be31a5229b9fa717560ee.zip |
Merging upstream version 1.68.2+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/ui/packed/packed-struct-layout.rs')
-rw-r--r-- | tests/ui/packed/packed-struct-layout.rs | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/tests/ui/packed/packed-struct-layout.rs b/tests/ui/packed/packed-struct-layout.rs new file mode 100644 index 000000000..d49c222e6 --- /dev/null +++ b/tests/ui/packed/packed-struct-layout.rs @@ -0,0 +1,28 @@ +// run-pass +#![allow(dead_code)] +use std::mem; + +#[repr(packed)] +struct S4 { + a: u8, + b: [u8; 3], +} + +#[repr(packed)] +struct S5 { + a: u8, + b: u32 +} + +pub fn main() { + unsafe { + let s4 = S4 { a: 1, b: [2,3,4] }; + let transd : [u8; 4] = mem::transmute(s4); + assert_eq!(transd, [1, 2, 3, 4]); + + let s5 = S5 { a: 1, b: 0xff_00_00_ff }; + let transd : [u8; 5] = mem::transmute(s5); + // Don't worry about endianness, the u32 is palindromic. + assert_eq!(transd, [1, 0xff, 0, 0, 0xff]); + } +} |