pub const fn metadata<T>(ptr: *const T) -> <T as Pointee>::Metadatawhere
T: ?Sized,
🔬This is a nightly-only experimental API. (
ptr_metadata
)Available on crate feature
std
only.Expand description
Extracts 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);