src/test/ui/consts/rustc-impl-const-stability.rs

   1 // check-pass
   2
   3 #![crate_type = "lib"]
   4 #![feature(staged_api)]
   5 #![feature(const_trait_impl)]
   6 #![stable(feature = "foo", since = "1.0.0")]
   7
   8 #[stable(feature = "potato", since = "1.27.0")]
   9 pub struct Data {
  10     _data: u128,
  11 }
  12
  13 #[stable(feature = "potato", since = "1.27.0")]
  14 #[rustc_const_unstable(feature = "data_foo", issue = "none")]
  15 impl const Default for Data {
  16     fn default() -> Data {
  17         Data { _data: 42 }
  18     }
  19 }