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Clarify/add must_use message for Rc/Arc/Weak::into_raw. #121287

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Mar 5, 2024
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Clarify/add must_use message for Rc/Arc/Weak::into_raw. #121287

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3 changes: 2 additions & 1 deletion library/alloc/src/rc.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1329,6 +1329,7 @@ impl<T: ?Sized, A: Allocator> Rc<T, A> {
/// let x_ptr = Rc::into_raw(x);
/// assert_eq!(unsafe { &*x_ptr }, "hello");
/// ```
#[must_use = "losing the pointer will leak memory"]
#[stable(feature = "rc_raw", since = "1.17.0")]
#[rustc_never_returns_null_ptr]
pub fn into_raw(this: Self) -> *const T {
Expand Down Expand Up @@ -2966,7 +2967,7 @@ impl<T: ?Sized, A: Allocator> Weak<T, A> {
///
/// [`from_raw`]: Weak::from_raw
/// [`as_ptr`]: Weak::as_ptr
#[must_use = "`self` will be dropped if the result is not used"]
#[must_use = "losing the pointer will leak memory"]
#[stable(feature = "weak_into_raw", since = "1.45.0")]
pub fn into_raw(self) -> *const T {
let result = self.as_ptr();
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2 changes: 1 addition & 1 deletion library/alloc/src/sync.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -2715,7 +2715,7 @@ impl<T: ?Sized, A: Allocator> Weak<T, A> {
///
/// [`from_raw`]: Weak::from_raw
/// [`as_ptr`]: Weak::as_ptr
#[must_use = "`self` will be dropped if the result is not used"]
#[must_use = "losing the pointer will leak memory"]
#[stable(feature = "weak_into_raw", since = "1.45.0")]
pub fn into_raw(self) -> *const T {
let result = self.as_ptr();
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