// 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]); } }