src/test/ui/dynamically-sized-types/dst-tuple-zst-offsets.rs

   1 // run-pass
   2
   3 #![feature(unsized_tuple_coercion)]
   4
   5 // Check that we do not change the offsets of ZST fields when unsizing
   6
   7 fn scalar_layout() {
   8     let sized: &(u8, [(); 13]) = &(123, [(); 13]);
   9     let unsize: &(u8, [()]) = sized;
  10     assert_eq!(sized.1.as_ptr(), unsize.1.as_ptr());
  11 }
  12
  13 fn scalarpair_layout() {
  14     let sized: &(u8, u16, [(); 13]) = &(123, 456, [(); 13]);
  15     let unsize: &(u8, u16, [()]) = sized;
  16     assert_eq!(sized.2.as_ptr(), unsize.2.as_ptr());
  17 }
  18
  19 pub fn main() {
  20     scalar_layout();
  21     scalarpair_layout();
  22 }