From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 14:02:58 +0200 Subject: Adding upstream version 1.64.0+dfsg1. Signed-off-by: Daniel Baumann --- src/test/ui/packed/packed-struct-layout.rs | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 src/test/ui/packed/packed-struct-layout.rs (limited to 'src/test/ui/packed/packed-struct-layout.rs') diff --git a/src/test/ui/packed/packed-struct-layout.rs b/src/test/ui/packed/packed-struct-layout.rs new file mode 100644 index 000000000..d49c222e6 --- /dev/null +++ b/src/test/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]); + } +} -- cgit v1.2.3