const: unstable · source · pub fn metadata<T: ?Sized>(ptr: *const T) -> <T as Pointee>::Metadata
🔬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.
§Example
#![feature(ptr_metadata)]
assert_eq!(std::ptr::metadata("foo"), 3_usize);
Run