Struct wasmi::ExternRef

impl ExternRef

pub fn new<T>(ctx: impl AsContextMut, object: impl Into<Option<T>>) -> Self
where T: 'static + Any + Send + Sync,

Creates a new ExternRef wrapping the given value.

pub fn null() -> Self

Creates a new ExternRef which is null.

pub fn is_null(&self) -> bool

Returns true if ExternRef is null.

pub fn data<'a, T: 'a>( &self, ctx: impl Into<StoreContext<'a, T>> ) -> Option<&'a dyn Any>

Returns a shared reference to the underlying data for this ExternRef.

§Panics

Panics if ctx does not own this ExternRef.

Trait Implementations§

impl Clone for ExternRef

fn clone(&self) -> ExternRef

Returns a copy of the value. Read more

1.0.0 · source§

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

Performs copy-assignment from source. Read more

impl Debug for ExternRef

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

Formats the value using the given formatter. Read more

impl Default for ExternRef

fn default() -> ExternRef

Returns the “default value” for a type. Read more

impl From<ExternRef> for UntypedValue

fn from(externref: ExternRef) -> Self

Converts to this type from the input type.

impl From<ExternRef> for Value

fn from(externref: ExternRef) -> Self

Converts to this type from the input type.

impl From<UntypedValue> for ExternRef

fn from(untyped: UntypedValue) -> Self

Converts to this type from the input type.

impl Copy for ExternRef

impl WasmType for ExternRef

Auto Trait Implementations§

impl UnwindSafe for ExternRef

Blanket Implementations§

impl<T> Any for T
where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T
where T: ?Sized,

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T
where T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T1> DecodeUntypedSlice for T1
where T1: From<UntypedValue>,

fn decode_untyped_slice(results: &[UntypedValue]) -> Result<T1, UntypedError>

Decodes the slice of UntypedValue as a value of type Self. Read more

impl<T> Downcast for T
where T: Any,

fn into_any(self: Box<T>) -> Box<dyn Any>

Convert Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>. Box<dyn Any> can then be further downcast into Box<ConcreteType> where ConcreteType implements Trait.

fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>

Convert Rc<Trait> (where Trait: Downcast) to Rc<Any>. Rc<Any> can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait.

fn as_any(&self) -> &(dyn Any + 'static)

Convert &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s.

fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Convert &mut Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &mut Any’s vtable from &mut Trait’s.

impl<T> DowncastSync for T
where T: Any + Send + Sync,

fn into_any_arc(self: Arc<T>) -> Arc<dyn Any + Sync + Send>

Convert Arc<Trait> (where Trait: Downcast) to Arc<Any>. Arc<Any> can then be further downcast into Arc<ConcreteType> where ConcreteType implements Trait.