src/test/run-pass/enum-discrim-autosizing.rs

   1 // Copyright 2013 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 use std::mem::size_of;
  12
  13 enum Ei8 {
  14     Ai8 = -1,
  15     Bi8 = 0
  16 }
  17
  18 enum Eu8 {
  19     Au8 = 0,
  20     Bu8 = 0x80
  21 }
  22
  23 enum Ei16 {
  24     Ai16 = -1,
  25     Bi16 = 0x80
  26 }
  27
  28 enum Eu16 {
  29     Au16 = 0,
  30     Bu16 = 0x8000
  31 }
  32
  33 enum Ei32 {
  34     Ai32 = -1,
  35     Bi32 = 0x8000
  36 }
  37
  38 enum Eu32 {
  39     Au32 = 0,
  40     Bu32 = 0x8000_0000
  41 }
  42
  43 enum Ei64 {
  44     Ai64 = -1,
  45     Bi64 = 0x8000_0000
  46 }
  47
  48 pub fn main() {
  49     assert_eq!(size_of::<Ei8>(), 1);
  50     assert_eq!(size_of::<Eu8>(), 1);
  51     assert_eq!(size_of::<Ei16>(), 2);
  52     assert_eq!(size_of::<Eu16>(), 2);
  53     assert_eq!(size_of::<Ei32>(), 4);
  54     assert_eq!(size_of::<Eu32>(), 4);
  55     #[cfg(target_pointer_width = "64")]
  56     assert_eq!(size_of::<Ei64>(), 8);
  57     #[cfg(target_pointer_width = "32")]
  58     assert_eq!(size_of::<Ei64>(), 4);
  59 }