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Rollup merge of #107576 - P1n3appl3:master, r=tmandry
[rust.git] / tests / ui / packed / packed-struct-generic-layout.rs
1 // run-pass
2 #![allow(dead_code)]
3 #![allow(overflowing_literals)]
4
5
6 use std::mem;
7
8 #[repr(packed)]
9 struct S<T, S> {
10     a: T,
11     b: u8,
12     c: S
13 }
14
15 pub fn main() {
16     unsafe {
17         let s = S { a: 0xff_ff_ff_ffu32, b: 1, c: 0xaa_aa_aa_aa as i32 };
18         let transd : [u8; 9] = mem::transmute(s);
19         // Don't worry about endianness, the numbers are palindromic.
20         assert_eq!(transd,
21                    [0xff, 0xff, 0xff, 0xff,
22                     1,
23                     0xaa, 0xaa, 0xaa, 0xaa]);
24
25
26         let s = S { a: 1u8, b: 2u8, c: 0b10000001_10000001 as i16};
27         let transd : [u8; 4] = mem::transmute(s);
28         // Again, no endianness problems.
29         assert_eq!(transd,
30                    [1, 2, 0b10000001, 0b10000001]);
31     }
32 }