src/test/run-pass/structs-enums/borrow-tuple-fields.rs

   1 // run-pass
   2
   3 struct Foo(isize, isize);
   4
   5 fn main() {
   6     let x = (1, 2);
   7     let a = &x.0;
   8     let b = &x.0;
   9     assert_eq!(*a, 1);
  10     assert_eq!(*b, 1);
  11
  12     let mut x = (1, 2);
  13     {
  14         let a = &x.0;
  15         let b = &mut x.1;
  16         *b = 5;
  17         assert_eq!(*a, 1);
  18     }
  19     assert_eq!(x.0, 1);
  20     assert_eq!(x.1, 5);
  21
  22
  23     let x = Foo(1, 2);
  24     let a = &x.0;
  25     let b = &x.0;
  26     assert_eq!(*a, 1);
  27     assert_eq!(*b, 1);
  28
  29     let mut x = Foo(1, 2);
  30     {
  31         let a = &x.0;
  32         let b = &mut x.1;
  33         *b = 5;
  34         assert_eq!(*a, 1);
  35     }
  36     assert_eq!(x.0, 1);
  37     assert_eq!(x.1, 5);
  38 }