metadata in std::ptr - Rust
Description: Extracts the metadata component of a pointer.

## metadata

# Function metadata

Source

    pub const fn metadata<T>(ptr: *const T) -> <T as Pointee>::Metadatawhere
        T: ?Sized,

🔬This is a nightly-only experimental API. (`ptr_metadata` #81513)
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);