src/test/ui/pattern/usefulness/slice-patterns-exhaustiveness.rs

   1 #![feature(slice_patterns)]
   2
   3 fn main() {
   4     let s: &[bool] = &[true; 0];
   5     let s1: &[bool; 1] = &[false; 1];
   6     let s2: &[bool; 2] = &[false; 2];
   7     let s3: &[bool; 3] = &[false; 3];
   8     let s10: &[bool; 10] = &[false; 10];
   9
  10     match s2 {
  11     //~^ ERROR `&[false, _]` not covered
  12         [true, .., true] => {}
  13     }
  14     match s3 {
  15     //~^ ERROR `&[false, ..]` not covered
  16         [true, .., true] => {}
  17     }
  18     match s10 {
  19     //~^ ERROR `&[false, ..]` not covered
  20         [true, .., true] => {}
  21     }
  22
  23     match s1 {
  24         [true, ..] => {}
  25         [.., false] => {}
  26     }
  27     match s2 {
  28     //~^ ERROR `&[false, true]` not covered
  29         [true, ..] => {}
  30         [.., false] => {}
  31     }
  32     match s3 {
  33     //~^ ERROR `&[false, .., true]` not covered
  34         [true, ..] => {}
  35         [.., false] => {}
  36     }
  37     match s {
  38     //~^ ERROR `&[false, .., true]` not covered
  39         [] => {}
  40         [true, ..] => {}
  41         [.., false] => {}
  42     }
  43
  44     match s {
  45     //~^ ERROR `&[_, ..]` not covered
  46         [] => {}
  47     }
  48     match s {
  49     //~^ ERROR `&[_, _, ..]` not covered
  50         [] => {}
  51         [_] => {}
  52     }
  53     match s {
  54     //~^ ERROR `&[false, ..]` not covered
  55         [] => {}
  56         [true, ..] => {}
  57     }
  58     match s {
  59     //~^ ERROR `&[false, _, ..]` not covered
  60         [] => {}
  61         [_] => {}
  62         [true, ..] => {}
  63     }
  64     match s {
  65     //~^ ERROR `&[_, .., false]` not covered
  66         [] => {}
  67         [_] => {}
  68         [.., true] => {}
  69     }
  70
  71     match s {
  72     //~^ ERROR `&[_, _, .., true]` not covered
  73         [] => {}
  74         [_] => {}
  75         [_, _] => {}
  76         [.., false] => {}
  77     }
  78     match s {
  79     //~^ ERROR `&[true, _, .., _]` not covered
  80         [] => {}
  81         [_] => {}
  82         [_, _] => {}
  83         [false, .., false] => {}
  84     }
  85
  86     const CONST: &[bool] = &[true];
  87     match s {
  88     //~^ ERROR `&[..]` not covered
  89         CONST => {}
  90     }
  91     match s {
  92     //~^ ERROR `&[true]` not covered
  93         [] => {},
  94         [false] => {},
  95         CONST => {},
  96         [_, _, ..] => {}
  97     }
  98     const CONST1: &[bool; 1] = &[true];
  99     match s1 {
 100     //~^ ERROR `&[false]` not covered
 101         CONST1 => {}
 102     }
 103     match s1 {
 104         CONST1 => {}
 105         [false] => {}
 106     }
 107 }