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docs: clarify explicitly freeing heap allocated memory

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This commit is contained in:
alpharush 2023-11-03 21:45:19 -05:00
parent f1b104f523
commit c7d8c65c1a
1 changed files with 11 additions and 3 deletions
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14
library/alloc/src/boxed.rs
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@ -1038,10 +1038,18 @@ impl<T: ?Sized, A: Allocator> Box<T, A> {
/// use std::ptr;
///
/// let x = Box::new(String::from("Hello"));
/// let p = Box::into_raw(x);
/// let ptr = Box::into_raw(x);
/// unsafe {
/// ptr::drop_in_place(p);
/// dealloc(p as *mut u8, Layout::new::<String>());
/// ptr::drop_in_place(ptr);
/// dealloc(ptr as *mut u8, Layout::new::<String>());
/// }
/// ```
/// Note: This is equivalent to the following:
/// ```
/// let x = Box::new(String::from("Hello"));
/// let ptr = Box::into_raw(x);
/// unsafe {
/// drop(Box::from_raw(ptr));
/// }
/// ```
///