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Add const_cell_into_inner to OnceCell #129382

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Aug 22, 2024
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Add const_cell_into_inner to OnceCell #129382

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3 changes: 2 additions & 1 deletion library/core/src/cell/once.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -309,7 +309,8 @@ impl<T> OnceCell<T> {
/// ```
#[inline]
#[stable(feature = "once_cell", since = "1.70.0")]
pub fn into_inner(self) -> Option<T> {
#[rustc_const_unstable(feature = "const_cell_into_inner", issue = "78729")]
pub const fn into_inner(self) -> Option<T> {
// Because `into_inner` takes `self` by value, the compiler statically verifies
// that it is not currently borrowed. So it is safe to move out `Option<T>`.
self.inner.into_inner()
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