src/test/ui/borrowck/or-patterns.rs

   1 // Test that borrow check considers all choices in an or pattern, even the
   2 // unreachable ones.
   3
   4 fn or_pattern_moves_all(x: ((String, String),)) {
   5     match x {
   6         ((y, _) | (_, y),) => (),
   7     }
   8     &x.0 .0;
   9     //~^ ERROR borrow of moved value
  10     &x.0 .1;
  11     //~^ ERROR borrow of moved value
  12 }
  13
  14 fn or_pattern_borrows_all(mut x: ((String, String),)) {
  15     let r = match x {
  16         ((ref y, _) | (_, ref y),) => y,
  17     };
  18     &mut x.0 .0;
  19     //~^ ERROR cannot borrow
  20     &mut x.0 .1;
  21     //~^ ERROR cannot borrow
  22     drop(r);
  23 }
  24
  25 fn or_pattern_borrows_all_mut(mut x: ((String, String),)) {
  26     let r = match x {
  27         ((ref mut y, _) | (_, ref mut y),) => y,
  28     };
  29     &x.0 .0;
  30     //~^ ERROR cannot borrow
  31     &x.0 .1;
  32     //~^ ERROR cannot borrow
  33     drop(r);
  34 }
  35
  36 fn let_or_pattern_moves_all(x: ((String, String),)) {
  37     let ((y, _) | (_, y),) = x;
  38     &x.0 .0;
  39     //~^ ERROR borrow of moved value
  40     &x.0 .1;
  41     //~^ ERROR borrow of moved value
  42 }
  43
  44 fn let_or_pattern_borrows_all(mut x: ((String, String),)) {
  45     let ((ref r, _) | (_, ref r),) = x;
  46     &mut x.0 .0;
  47     //~^ ERROR cannot borrow
  48     &mut x.0 .1;
  49     //~^ ERROR cannot borrow
  50     drop(r);
  51 }
  52
  53 fn let_or_pattern_borrows_all_mut(mut x: ((String, String),)) {
  54     let ((ref mut r, _) | (_, ref mut r),) = x;
  55     &x.0 .0;
  56     //~^ ERROR cannot borrow
  57     &x.0 .1;
  58     //~^ ERROR cannot borrow
  59     drop(r);
  60 }
  61
  62 fn main() {}