diff options
Diffstat (limited to 'src/libcore/mem')
| -rw-r--r-- | src/libcore/mem/mod.rs | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/libcore/mem/mod.rs b/src/libcore/mem/mod.rs index 90144d11dc9..c23d0adab5c 100644 --- a/src/libcore/mem/mod.rs +++ b/src/libcore/mem/mod.rs @@ -864,6 +864,7 @@ impl<T> fmt::Debug for Discriminant<T> { /// assert_ne!(mem::discriminant(&Foo::B(3)), mem::discriminant(&Foo::C(3))); /// ``` #[stable(feature = "discriminant_value", since = "1.21.0")] -pub fn discriminant<T>(v: &T) -> Discriminant<T> { +#[rustc_const_unstable(feature = "const_discriminant", issue = "69821")] +pub const fn discriminant<T>(v: &T) -> Discriminant<T> { Discriminant(intrinsics::discriminant_value(v), PhantomData) } |