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Implement From<[T; N]> for Rc<[T]> and Arc<[T]>
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nvzqz committed Jul 25, 2023
1 parent 31395ec commit b2d35e1
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21 changes: 21 additions & 0 deletions library/alloc/src/rc.rs
Original file line number Diff line number Diff line change
Expand Up @@ -2406,6 +2406,27 @@ impl<T> From<T> for Rc<T> {
}
}

#[cfg(not(no_global_oom_handling))]
#[stable(feature = "shared_from_array", since = "CURRENT_RUSTC_VERSION")]
impl<T, const N: usize> From<[T; N]> for Rc<[T]> {
/// Converts a [`[T; N]`](prim@array) into an `Rc<[T]>`.
///
/// The conversion moves the array into a newly allocated `Rc`.
///
/// # Example
///
/// ```
/// # use std::rc::Rc;
/// let original: [i32; 3] = [1, 2, 3];
/// let shared: Rc<[i32]> = Rc::from(original);
/// assert_eq!(&[1, 2, 3], &shared[..]);
/// ```
#[inline]
fn from(v: [T; N]) -> Rc<[T]> {
Rc::<[T; N]>::from(v)
}
}

#[cfg(not(no_global_oom_handling))]
#[stable(feature = "shared_from_slice", since = "1.21.0")]
impl<T: Clone> From<&[T]> for Rc<[T]> {
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21 changes: 21 additions & 0 deletions library/alloc/src/sync.rs
Original file line number Diff line number Diff line change
Expand Up @@ -3269,6 +3269,27 @@ impl<T> From<T> for Arc<T> {
}
}

#[cfg(not(no_global_oom_handling))]
#[stable(feature = "shared_from_array", since = "CURRENT_RUSTC_VERSION")]
impl<T, const N: usize> From<[T; N]> for Arc<[T]> {
/// Converts a [`[T; N]`](prim@array) into an `Arc<[T]>`.
///
/// The conversion moves the array into a newly allocated `Arc`.
///
/// # Example
///
/// ```
/// # use std::sync::Arc;
/// let original: [i32; 3] = [1, 2, 3];
/// let shared: Arc<[i32]> = Arc::from(original);
/// assert_eq!(&[1, 2, 3], &shared[..]);
/// ```
#[inline]
fn from(v: [T; N]) -> Arc<[T]> {
Arc::<[T; N]>::from(v)
}
}

#[cfg(not(no_global_oom_handling))]
#[stable(feature = "shared_from_slice", since = "1.21.0")]
impl<T: Clone> From<&[T]> for Arc<[T]> {
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