Struct NativeObjectBox 

pub struct NativeObjectBox { /* private fields */ }

A type-erased wrapper around Box<dyn NativeObject>.

This is what GcPtr actually points to inside Value::NativeObject. The wrapper exists because GcPtr<dyn NativeObject> would require unsized coercions; a concrete struct is simpler.

Implementations

impl NativeObjectBox

pub fn new(obj: impl NativeObject) -> Self

Wrap a concrete NativeObject implementor.

pub fn type_tag(&self) -> &str

The type tag for protocol dispatch.

pub fn downcast_ref<T: NativeObject>(&self) -> Option<&T>

Downcast to a concrete type.

pub fn inner(&self) -> &dyn NativeObject

Access the inner trait object.

Trait Implementations

impl Debug for NativeObjectBox

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

Formats the value using the given formatter.

impl Trace for NativeObjectBox

fn trace(&self, visitor: &mut MarkVisitor)

fn gc_size_extra(&self) -> usize