diff options
| -rw-r--r-- | library/core/src/ops/range.rs | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/library/core/src/ops/range.rs b/library/core/src/ops/range.rs index 1d67e65e51f..0571dc74b9a 100644 --- a/library/core/src/ops/range.rs +++ b/library/core/src/ops/range.rs @@ -678,6 +678,29 @@ pub enum Bound<T> { Unbounded, } +#[unstable(feature = "bound_as_ref", issue = "80996")] +impl<T> Bound<T> { + /// Converts from `&Bound<T>` to `Bound<&T>`. + #[inline] + pub fn as_ref(&self) -> Bound<&T> { + match *self { + Included(ref x) => Included(x), + Excluded(ref x) => Excluded(x), + Unbounded => Unbounded, + } + } + + /// Converts from `&mut Bound<T>` to `Bound<&T>`. + #[inline] + pub fn as_mut(&mut self) -> Bound<&mut T> { + match *self { + Included(ref mut x) => Included(x), + Excluded(ref mut x) => Excluded(x), + Unbounded => Unbounded, + } + } +} + impl<T: Clone> Bound<&T> { /// Map a `Bound<&T>` to a `Bound<T>` by cloning the contents of the bound. /// |