src/test/ui/pattern/usefulness/slice-pattern-const-2.rs

   1 #![deny(unreachable_patterns)]
   2
   3 fn main() {
   4     let s = &[0x00; 4][..]; //Slice of any value
   5     const MAGIC_TEST: &[u32] = &[4, 5, 6, 7]; //Const slice to pattern match with
   6     match s {
   7         MAGIC_TEST => (),
   8         [0x00, 0x00, 0x00, 0x00] => (),
   9         [4, 5, 6, 7] => (), // FIXME(oli-obk): this should warn, but currently does not
  10         _ => (),
  11     }
  12     match s {
  13         [0x00, 0x00, 0x00, 0x00] => (),
  14         MAGIC_TEST => (),
  15         [4, 5, 6, 7] => (), // FIXME(oli-obk): this should warn, but currently does not
  16         _ => (),
  17     }
  18     match s {
  19         [0x00, 0x00, 0x00, 0x00] => (),
  20         [4, 5, 6, 7] => (),
  21         MAGIC_TEST => (), // FIXME(oli-obk): this should warn, but currently does not
  22         _ => (),
  23     }
  24     const FOO: [u32; 1] = [4];
  25     match [99] {
  26         [0x00] => (),
  27         [4] => (),
  28         FOO => (), //~ ERROR unreachable pattern
  29         _ => (),
  30     }
  31 }