diff options
Diffstat (limited to 'src/test/ui/packed/packed-tuple-struct-layout.rs')
-rw-r--r-- | src/test/ui/packed/packed-tuple-struct-layout.rs | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/test/ui/packed/packed-tuple-struct-layout.rs b/src/test/ui/packed/packed-tuple-struct-layout.rs new file mode 100644 index 000000000..931be5b94 --- /dev/null +++ b/src/test/ui/packed/packed-tuple-struct-layout.rs @@ -0,0 +1,23 @@ +// run-pass +use std::mem; + +#[repr(packed)] +#[allow(unused_tuple_struct_fields)] +struct S4(u8,[u8; 3]); + +#[repr(packed)] +#[allow(unused_tuple_struct_fields)] +struct S5(u8,u32); + +pub fn main() { + unsafe { + let s4 = S4(1, [2,3,4]); + let transd : [u8; 4] = mem::transmute(s4); + assert_eq!(transd, [1, 2, 3, 4]); + + let s5 = S5(1, 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]); + } +} |