Struct wasmtime_environ::wasmparser::RefType

pub struct RefType(_);

A reference type.

The reference types proposal first introduced externref and funcref.

The function refererences proposal introduced typed function references.

Implementations

impl RefType

pub const FUNCREF: RefType = RefType::from_u32(Self::ANY_FUNC_DISCRIMINANT | Self::NULLABLE_MASK)

An nullable untyped function reference aka (ref null func) aka funcref aka anyfunc.

pub const EXTERNREF: RefType = RefType::from_u32(Self::EXTERN_DISCRIMINANT | Self::NULLABLE_MASK)

A nullable reference to an extern object aka (ref null extern) aka externref.

pub const fn typed_func(nullable: bool, index: u32) -> Option<RefType>

Create a reference to a typed function with the type at the given index.

Returns None when the type index is beyond this crate’s implementation limits and therfore is not representable.

pub fn new(nullable: bool, heap_type: HeapType) -> Option<RefType>

Create a new RefType.

Returns None when the heap type’s type index (if any) is beyond this crate’s implementation limits and therfore is not representable.

pub const fn is_typed_func_ref(&self) -> bool

Is this a reference to a typed function?

pub const fn type_index(&self) -> Option<u32>

If this is a reference to a typed function, get its type index.

pub fn is_func_ref(&self) -> bool

Is this an untyped function reference aka (ref null func) aka funcref aka anyfunc?

pub fn is_extern_ref(&self) -> bool

Is this a (ref null extern) aka externref?

pub const fn is_nullable(&self) -> bool

Is this ref type nullable?

pub fn as_non_null(&self) -> RefType

Get the non-nullable version of this ref type.

pub fn heap_type(&self) -> HeapType

Get the heap type that this is a reference to.

Trait Implementations

impl Clone for RefType

fn clone(&self) -> RefType

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for RefType

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<'a> FromReader<'a> for RefType

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

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

impl Hash for RefType

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<RefType> for RefType

fn eq(&self, other: &RefType) -> 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<RefType> for WasmType

type Error = WasmError

The type returned in the event of a conversion error.

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

Performs the conversion.

impl Copy for RefType

impl Eq for RefType

impl StructuralEq for RefType

impl StructuralPartialEq for RefType