src/test/ui/const-eval/ice-packed.rs

   1 // Copyright 2018 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 // compile-pass
  12 #[derive(Copy, Clone, PartialEq, Eq)]
  13 #[repr(packed)]
  14 pub struct Num(u64);
  15
  16 impl Num {
  17     pub const ZERO: Self = Num(0);
  18 }
  19
  20 pub fn decrement(a: Num) -> Num {
  21     match a {
  22         Num::ZERO => Num::ZERO,
  23         a => Num(a.0 - 1)
  24     }
  25 }
  26
  27 fn main() {
  28 }