Enum Ref 

pub enum Ref<T> {
    Val(T),
    Null,
}

A nullable reference type.

Variants

Val(T)

The Ref is a non-null value.

Null

The Ref is null.

Implementations

impl<T> Ref<T>

pub fn is_null(&self) -> bool

Returns true is self is null.

pub fn val(&self) -> Option<&T>

Returns Some if self is a non-null value.

Otherwise returns None.

pub fn as_ref(&self) -> Ref<&T>

Converts from &Ref<T> to Ref<&T>.

Trait Implementations

impl<T: Clone> Clone for Ref<T>

fn clone(&self) -> Ref<T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for Ref<T>

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

Formats the value using the given formatter.

impl<T> Default for Ref<T>

fn default() -> Ref<T>

Returns the “default value” for a type.

impl From<Ref<ExternRef>> for UntypedVal

fn from(reftype: Ref<ExternRef>) -> Self

Converts to this type from the input type.

impl From<Ref<ExternRef>> for Val

fn from(externref: Ref<ExternRef>) -> Self

Converts to this type from the input type.

impl From<Ref<Func>> for UntypedVal

fn from(reftype: Ref<Func>) -> Self

Converts to this type from the input type.

impl From<Ref<Func>> for Val

fn from(funcref: Ref<Func>) -> Self

Converts to this type from the input type.

impl<T> From<T> for Ref<T>

fn from(value: T) -> Self

Converts to this type from the input type.

impl From<TypedVal> for Ref<ExternRef>

fn from(typed_value: TypedVal) -> Self

Converts to this type from the input type.

impl From<TypedVal> for Ref<Func>

fn from(typed_value: TypedVal) -> Self

Converts to this type from the input type.

impl From<UntypedVal> for Ref<ExternRef>

fn from(untyped: UntypedVal) -> Self

Converts to this type from the input type.

impl From<UntypedVal> for Ref<Func>

fn from(untyped: UntypedVal) -> Self

Converts to this type from the input type.

impl Typed for Ref<ExternRef>

const TY: ValType = crate::ValType::ExternRef

The static associated Wasm type.

impl Typed for Ref<Func>

const TY: ValType = crate::ValType::FuncRef

The static associated Wasm type.

impl<T: Copy> Copy for Ref<T>

impl WasmTy for Ref<ExternRef>

impl WasmTy for Ref<Func>