src/test/ui/macros/rfc-2011-nicer-assert-messages/feature-gate-generic_assert.rs

   1 // compile-flags: --test
   2 // ignore-tidy-linelength
   3 // run-pass
   4
   5 #![feature(core_intrinsics, generic_assert, generic_assert_internals)]
   6
   7 use std::fmt::{Debug, Formatter};
   8
   9 #[derive(Clone, Copy, PartialEq)]
  10 struct CopyDebug(i32);
  11
  12 impl Debug for CopyDebug {
  13   fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), std::fmt::Error> {
  14     f.write_str("With great power comes great electricity bills")
  15   }
  16 }
  17
  18 #[should_panic(expected = "Assertion failed: copy_debug == CopyDebug(3)\nWith captures:\n  copy_debug = With great power comes great electricity bills\n")]
  19 #[test]
  20 fn test() {
  21   let copy_debug = CopyDebug(1);
  22   assert!(copy_debug == CopyDebug(3));
  23 }
  24
  25 fn main() {
  26 }