Enum wasmtime_environ::wasmparser::HeapType

pub enum HeapType {
    Concrete(UnpackedIndex),
    Func,
    Extern,
    Any,
    None,
    NoExtern,
    NoFunc,
    Eq,
    Struct,
    Array,
    I31,
}

A heap type.

Variants

Concrete(UnpackedIndex)

A concrete, user-defined type.

Introduced in the function-references proposal.

Func

The abstract, untyped (any) function.

Introduced in the references-types proposal.

Extern

The abstract, external heap type.

Introduced in the references-types proposal.

Any

The abstract any heap type.

The common supertype (a.k.a. top) of all internal types.

Introduced in the GC proposal.

None

The abstract none heap type.

The common subtype (a.k.a. bottom) of all internal types.

Introduced in the GC proposal.

NoExtern

The abstract noextern heap type.

The common subtype (a.k.a. bottom) of all external types.

Introduced in the GC proposal.

NoFunc

The abstract nofunc heap type.

The common subtype (a.k.a. bottom) of all function types.

Introduced in the GC proposal.

Eq

The abstract eq heap type.

The common supertype of all heap types on which the ref.eq instruction is allowed.

Introduced in the GC proposal.

Struct

The abstract struct heap type.

The common supertype of all struct types.

Introduced in the GC proposal.

Array

The abstract array heap type.

The common supertype of all array types.

Introduced in the GC proposal.

I31

The abstract i31 heap type.

It is not expected that Wasm runtimes actually store these values on the heap, but unbox them inline into the i31refs themselves instead.

Introduced in the GC proposal.

Trait Implementations

impl Clone for HeapType

fn clone(&self) -> HeapType

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for HeapType

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

Formats the value using the given formatter.

impl<'a> FromReader<'a> for HeapType

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

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

impl Hash for HeapType

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 for HeapType

fn eq(&self, other: &HeapType) -> 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 Copy for HeapType

impl Eq for HeapType

impl StructuralPartialEq for HeapType