Struct TagType 

pub struct TagType { /* private fields */ }

Available on crate feature runtime only.

A descriptor for a tag in a WebAssembly module.

Note that tags are local to an Instance, i.e., are a runtime entity. However, a tag is associated with a function type, and so has a kind of static type. This descriptor is a thin wrapper around a FuncType representing the function type of a tag.

Implementations

impl TagType

pub fn new(ty: FuncType) -> TagType

Creates a new global descriptor of the specified type.

pub fn ty(&self) -> &FuncType

Returns the underlying function type of this tag descriptor.

pub fn default_value(&self, store: impl AsContextMut) -> Result<RuntimeTag>

Construct a new default tag with this type.

This creates a host Tag in the given store. Tag instances have no content other than their type, so this “default” value is identical to ordinary host tag allocation.

Trait Implementations

impl Clone for TagType

fn clone(&self) -> TagType

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TagType

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

Formats the value using the given formatter.

impl From<TagType> for ExternType

fn from(ty: TagType) -> ExternType

Converts to this type from the input type.

impl Hash for TagType

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

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.