Struct NrAny 

pub struct NrAny { /* private fields */ }

A type-erased value that can hold any data type. This struct is #[repr(C)] and ABI-stable.

Implementations

impl NrAny

pub fn new<T: Clone + Send + Sync + 'static>(value: T, type_tag: u32) -> Self

Stores a clonable, thread-safe Rust value behind the ABI container.

pub fn from_bytes(bytes: &[u8], type_tag: u32) -> Self

Stores an owned copy of a byte slice as a Vec<u8>.

pub fn as_ptr<T>(&self) -> Result<*const T, NrStatus>

Returns a typed raw pointer after checking the stored byte size.

The user-defined type tag is not a Rust type identifier. The caller must verify NrAny::type_tag before dereferencing the returned pointer.

pub fn as_mut_ptr<T>(&mut self) -> Result<*mut T, NrStatus>

pub fn is_null(&self) -> bool

pub fn type_tag(&self) -> u32

pub fn size(&self) -> u64

Trait Implementations

impl Clone for NrAny

fn clone(&self) -> Self

Clone an NrAny.

Safety / ABI v1 limitation

NrAny is type-erased and ABI v1 has no clone_fn in the struct. Cloning a value that owns heap resources (i.e. has a drop_fn) by memcpy would shallow-copy any inner pointers and cause a double-free when both copies are dropped. Therefore:

• Null payload → returns default() (null).
• drop_fn = None (POD payload) → safe deep copy via byte memcpy.
• drop_fn = Some(_) → panics, because we cannot safely deep-copy without a type-aware clone_fn. Use drop_fn = None and a POD representation, or wait for ABI v2 which adds clone_fn.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for NrAny

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for NrAny

fn default() -> Self

Returns the “default value” for a type.

impl Drop for NrAny

fn drop(&mut self)

Executes the destructor for this type.

fn pin_drop(self: Pin<&mut Self>)

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

Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned.

impl Send for NrAny

impl Sync for NrAny