diff options
| -rw-r--r-- | library/core/src/array/mod.rs | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/library/core/src/array/mod.rs b/library/core/src/array/mod.rs index 123a191dd2c..769ef02873d 100644 --- a/library/core/src/array/mod.rs +++ b/library/core/src/array/mod.rs @@ -12,6 +12,7 @@ use crate::convert::{Infallible, TryFrom}; use crate::fmt; use crate::hash::{self, Hash}; use crate::marker::Unsize; +use crate::ops::{Index, IndexMut}; use crate::slice::{Iter, IterMut}; mod iter; @@ -208,6 +209,30 @@ impl<'a, T, const N: usize> IntoIterator for &'a mut [T; N] { } } +#[stable(feature = "index_trait_on_arrays", since = "1.50.0")] +impl<T, I, const N: usize> Index<I> for [T; N] +where + [T]: Index<I>, +{ + type Output = <[T] as Index<I>>::Output; + + #[inline] + fn index(&self, index: I) -> &Self::Output { + Index::index(self as &[T], index) + } +} + +#[stable(feature = "index_trait_on_arrays", since = "1.50.0")] +impl<T, I, const N: usize> IndexMut<I> for [T; N] +where + [T]: IndexMut<I>, +{ + #[inline] + fn index_mut(&mut self, index: I) -> &mut Self::Output { + IndexMut::index_mut(self as &mut [T], index) + } +} + #[stable(feature = "rust1", since = "1.0.0")] impl<A, B, const N: usize> PartialEq<[B; N]> for [A; N] where |