Function std::ptr::metadata

const: unstable · source · []
pub fn metadata<T>(ptr: *const T) -> <T as Pointee>::Metadata where
    T: ?Sized
🔬 This is a nightly-only experimental API. (ptr_metadata #81513)
Expand description

Extract the metadata component of a pointer.

Values of type *mut T, &T, or &mut T can be passed directly to this function as they implicitly coerce to *const T.



assert_eq!(std::ptr::metadata("foo"), 3_usize);