| // Test that `#[rustc_*]` attributes are gated by `rustc_attrs` feature gate. |
| |
| #[rustc_variance] |
| //~^ ERROR use of an internal attribute [E0658] |
| //~| NOTE the `#[rustc_variance]` attribute is an internal implementation detail that will never be stable |
| //~| NOTE the `#[rustc_variance]` attribute is used for rustc unit tests |
| #[rustc_nonnull_optimization_guaranteed] |
| //~^ ERROR use of an internal attribute [E0658] |
| //~| NOTE the `#[rustc_nonnull_optimization_guaranteed]` attribute is an internal implementation detail that will never be stable |
| //~| NOTE the `#[rustc_nonnull_optimization_guaranteed]` attribute is just used to document guaranteed niche optimizations in the standard library |
| //~| NOTE the compiler does not even check whether the type indeed is being non-null-optimized; it is your responsibility to ensure that the attribute is only used on types that are optimized |
| fn main() {} |
