Enum wasmtime::Val

pub enum Val {
    I32(i32),
    I64(i64),
    F32(u32),
    F64(u64),
    AnyRef(AnyRef),
    FuncRef(Func),
    V128(u128),
}

Possible runtime values that a WebAssembly module can either consume or produce.

Variants

I32(i32)

A 32-bit integer

I64(i64)

A 64-bit integer

F32(u32)

A 32-bit float.

Note that the raw bits of the float are stored here, and you can use f32::from_bits to create an f32 value.

F64(u64)

A 64-bit float.

Note that the raw bits of the float are stored here, and you can use f64::from_bits to create an f64 value.

AnyRef(AnyRef)

An anyref value which can hold opaque data to the wasm instance itself.

Note that this is a nullable value as well.

FuncRef(Func)

A first-class reference to a WebAssembly function.

V128(u128)

A 128-bit number

Methods

impl Val

pub fn null() -> Val

Returns a null anyref value.

pub fn ty(&self) -> ValType

Returns the corresponding ValType for this Val.

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

Attempt to access the underlying value of this Val, returning None if it is not the correct type.

pub fn unwrap_i32(&self) -> i32

Returns the underlying value of this Val, panicking if it's the wrong type.

Panics

Panics if self is not of the right type.

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

Attempt to access the underlying value of this Val, returning None if it is not the correct type.

pub fn unwrap_i64(&self) -> i64

Returns the underlying value of this Val, panicking if it's the wrong type.

Panics

Panics if self is not of the right type.

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

Attempt to access the underlying value of this Val, returning None if it is not the correct type.

pub fn unwrap_f32(&self) -> f32

Returns the underlying value of this Val, panicking if it's the wrong type.

Panics

Panics if self is not of the right type.

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

Attempt to access the underlying value of this Val, returning None if it is not the correct type.

pub fn unwrap_f64(&self) -> f64

Returns the underlying value of this Val, panicking if it's the wrong type.

Panics

Panics if self is not of the right type.

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

Attempt to access the underlying value of this Val, returning None if it is not the correct type.

pub fn unwrap_funcref(&self) -> &Func

Returns the underlying value of this Val, panicking if it's the wrong type.

Panics

Panics if self is not of the right type.

pub fn v128(&self) -> Option<u128>

Attempt to access the underlying value of this Val, returning None if it is not the correct type.

pub fn unwrap_v128(&self) -> u128

Returns the underlying value of this Val, panicking if it's the wrong type.

Panics

Panics if self is not of the right type.

pub fn anyref(&self) -> Option<AnyRef>

Attempt to access the underlying value of this Val, returning None if it is not the correct type.

This will return Some for both the AnyRef and FuncRef types.

pub fn unwrap_anyref(&self) -> AnyRef

Returns the underlying value of this Val, panicking if it's the wrong type.

Panics

Panics if self is not of the right type.

Trait Implementations

impl Clone for Val

fn clone(&self) -> Val

Returns a copy 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<AnyRef> for Val

fn from(val: AnyRef) -> Val

Performs the conversion.

impl From<Func> for Val

fn from(val: Func) -> Val

Performs the conversion.

impl From<RuntimeValue> for Val

fn from(rv: RuntimeValue) -> Self

Performs the conversion.

impl From<f32> for Val

fn from(val: f32) -> Val

Performs the conversion.

impl From<f64> for Val

fn from(val: f64) -> Val

Performs the conversion.

impl From<i32> for Val

fn from(val: i32) -> Val

Performs the conversion.

impl From<i64> for Val

fn from(val: i64) -> Val

Performs the conversion.