| // Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| // ignore-linux #7340 fails on 32-bit linux |
| // ignore-macos #7340 fails on 32-bit macos |
| |
| use std::mem; |
| |
| enum Tag<A> { |
| Tag(A) |
| } |
| |
| struct Rec { |
| c8: u8, |
| t: Tag<u64> |
| } |
| |
| fn mk_rec() -> Rec { |
| return Rec { c8:0u8, t:Tag(0u64) }; |
| } |
| |
| fn is_8_byte_aligned(u: &Tag<u64>) -> bool { |
| let p: uint = unsafe { mem::transmute(u) }; |
| return (p & 7u) == 0u; |
| } |
| |
| pub fn main() { |
| let x = mk_rec(); |
| assert!(is_8_byte_aligned(&x.t)); |
| } |