// 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]); } }