Enum Val 

pub enum Val {
    I32(i32),
    I64(i64),
    F32(F32),
    F64(F64),
    V128(V128),
    FuncRef(Ref<Func>),
    ExternRef(Ref<ExternRef>),
}

Runtime representation of a Wasm value.

Wasm code manipulate values of the four basic value types: integers and floating-point (IEEE 754-2008) data of 32 or 64 bit width each, respectively.

There is no distinction between signed and unsigned integer types. Instead, integers are interpreted by respective operations as either unsigned or signed in two’s complement representation.

Variants

I32(i32)

Value of 32-bit signed or unsigned integer.

I64(i64)

Value of 64-bit signed or unsigned integer.

F32(F32)

Value of 32-bit IEEE 754-2008 floating point number.

F64(F64)

Value of 64-bit IEEE 754-2008 floating point number.

V128(V128)

128-bit Wasm simd proposal vector.

FuncRef(Ref<Func>)

A nullable Func reference.

ExternRef(Ref<ExternRef>)

A nullable ExternRef reference.

Implementations

impl Val

pub fn default(value_type: ValType) -> Self

Creates new default value of given type.

pub fn ty(&self) -> ValType

Get variable type for this value.

pub fn i32(&self) -> Option<i32>

Returns the underlying i32 if the type matches otherwise returns None.

pub fn i64(&self) -> Option<i64>

Returns the underlying i64 if the type matches otherwise returns None.

pub fn f32(&self) -> Option<F32>

Returns the underlying f32 if the type matches otherwise returns None.

pub fn f64(&self) -> Option<F64>

Returns the underlying f64 if the type matches otherwise returns None.

pub fn funcref(&self) -> Option<Ref<&Func>>

Returns the underlying funcref if the type matches otherwise returns None.

pub fn externref(&self) -> Option<Ref<&ExternRef>>

Returns the underlying externref if the type matches otherwise returns None.

Trait Implementations

impl Clone for Val

fn clone(&self) -> Val

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Val

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

Formats the value using the given formatter.

impl From<ExternRef> for Val

fn from(externref: ExternRef) -> Self

Converts to this type from the input type.

impl From<F32> for Val

fn from(val: F32) -> Self

Converts to this type from the input type.

impl From<F64> for Val

fn from(val: F64) -> Self

Converts to this type from the input type.

impl From<Func> for Val

fn from(func: Func) -> 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 Val

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

Converts to this type from the input type.

impl From<TypedVal> for Val

fn from(value: TypedVal) -> Self

Converts to this type from the input type.

impl From<V128> for Val

fn from(value: V128) -> Self

Converts to this type from the input type.

impl From<Val> for TypedVal

fn from(value: Val) -> Self

Converts to this type from the input type.

impl From<Val> for UntypedVal

fn from(value: Val) -> Self

Converts to this type from the input type.

impl From<i32> for Val

fn from(val: i32) -> Self

Converts to this type from the input type.

impl From<i64> for Val

fn from(val: i64) -> Self

Converts to this type from the input type.