Enum wasmtime_environ::wasmparser::ValType

pub enum ValType {
    I32,
    I64,
    F32,
    F64,
    V128,
    Ref(RefType),
}

Represents the types of values in a WebAssembly module.

Variants

I32

The value type is i32.

I64

The value type is i64.

F32

The value type is f32.

F64

The value type is f64.

V128

The value type is v128.

Ref(RefType)

The value type is a reference. Which type of reference is decided by RefType. This is a change in syntax from the function references proposal, which now provides FuncRef and ExternRef as sugar for the generic ref construct.

Implementations

impl ValType

pub const FUNCREF: ValType = ValType::Ref(RefType::FUNCREF)

Alias for the wasm funcref type.

pub const EXTERNREF: ValType = ValType::Ref(RefType::EXTERNREF)

Alias for the wasm externref type.

pub fn is_reference_type(&self) -> bool

Returns whether this value type is a “reference type”.

Only reference types are allowed in tables, for example, and with some instructions. Current reference types include funcref and externref.

pub fn is_defaultable(&self) -> bool

Whether the type is defaultable according to function references spec. This amounts to whether it’s a non-nullable ref

Trait Implementations

impl Clone for ValType

fn clone(&self) -> ValType

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ValType

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

Formats the value using the given formatter.

impl From<RefType> for ValType

fn from(ty: RefType) -> ValType

Converts to this type from the input type.

impl From<WasmType> for ValType

fn from(ty: WasmType) -> ValType

Converts to this type from the input type.

impl<'a> FromReader<'a> for ValType

fn from_reader( reader: &mut BinaryReader<'a> ) -> Result<ValType, BinaryReaderError>

Attempts to read Self from the provided binary reader, returning an error if it is unable to do so.

impl Hash for ValType

fn hash<__H>(&self, state: &mut __H)where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq<ValType> for ValType

fn eq(&self, other: &ValType) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl TryFrom<ValType> for WasmType

type Error = WasmError

The type returned in the event of a conversion error.

fn try_from( ty: ValType ) -> Result<WasmType, <WasmType as TryFrom<ValType>>::Error>

Performs the conversion.

impl Copy for ValType

impl Eq for ValType

impl StructuralEq for ValType

impl StructuralPartialEq for ValType