example/track-caller-attribute.rs

   1 // Based on https://github.com/anp/rust/blob/175631311716d7dfeceec40d2587cde7142ffa8c/src/test/ui/rfc-2091-track-caller/track-caller-attribute.rs
   2
   3 // run-pass
   4
   5 use std::panic::Location;
   6
   7 #[track_caller]
   8 fn tracked() -> &'static Location<'static> {
   9     Location::caller()
  10 }
  11
  12 fn nested_intrinsic() -> &'static Location<'static> {
  13     Location::caller()
  14 }
  15
  16 fn nested_tracked() -> &'static Location<'static> {
  17     tracked()
  18 }
  19
  20 fn main() {
  21     let location = Location::caller();
  22     assert_eq!(location.file(), file!());
  23     assert_eq!(location.line(), 21);
  24     assert_eq!(location.column(), 20);
  25
  26     let tracked = tracked();
  27     assert_eq!(tracked.file(), file!());
  28     assert_eq!(tracked.line(), 26);
  29     assert_eq!(tracked.column(), 19);
  30
  31     let nested = nested_intrinsic();
  32     assert_eq!(nested.file(), file!());
  33     assert_eq!(nested.line(), 13);
  34     assert_eq!(nested.column(), 5);
  35
  36     let contained = nested_tracked();
  37     assert_eq!(contained.file(), file!());
  38     assert_eq!(contained.line(), 17);
  39     assert_eq!(contained.column(), 5);
  40 }