Function std::intrinsics::retag_box_to_raw

pub unsafe fn retag_box_to_raw<T, A>(ptr: *mut T) -> *mut T
where
    T: ?Sized,

🔬This is a nightly-only experimental API. (core_intrinsics)

Retag a box pointer as part of casting it to a raw pointer. This is the Box equivalent of (x: &mut T) as *mut T. The input pointer must be the pointer of a Box (passed as raw pointer to avoid all questions around move semantics and custom allocators), and A must be the Box’s allocator.