Enum wasmer::Extern

pub enum Extern {
    Function(Function),
    Global(Global),
    Table(Table),
    Memory(Memory),
}

An Extern is the runtime representation of an entity that can be imported or exported.

Spec: https://webassembly.github.io/spec/core/exec/runtime.html#external-values

Variants

Function(Function)

A external Function.

Global(Global)

A external Global.

Table(Table)

A external Table.

Memory(Memory)

A external Memory.

Implementations

impl Extern

pub fn ty(&self) -> ExternType

Return the underlying type of the inner Extern.

pub fn from_vm_export(store: &Store, export: Export) -> Self

Create an Extern from an wasmer_engine::Export.

Trait Implementations

impl Clone for Extern

fn clone(&self) -> Extern

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Extern

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

Formats the value using the given formatter.

impl<'a> Exportable<'a> for Extern

fn to_export(&self) -> Export

This function is used when providedd the Extern as exportable, so it can be used while instantiating the Module.

fn get_self_from_extern(_extern: &'a Self) -> Result<&'a Self, ExportError>

Implementation of how to get the export corresponding to the implementing type from an Instance by name.

fn into_weak_instance_ref(&mut self)

Convert the extern internally to hold a weak reference to the InstanceRef. This is useful for preventing cycles, for example for data stored in a type implementing WasmerEnv.

impl From<Function> for Extern

fn from(r: Function) -> Self

Performs the conversion.

impl From<Global> for Extern

fn from(r: Global) -> Self

Performs the conversion.

impl From<Memory> for Extern

fn from(r: Memory) -> Self

Performs the conversion.

impl From<Table> for Extern

fn from(r: Table) -> Self

Performs the conversion.

impl MemoryUsage for Extern

fn size_of_val(&self, visited: &mut dyn MemoryUsageTracker) -> usize

Returns the size of the referenced value in bytes.

impl StoreObject for Extern

fn comes_from_same_store(&self, store: &Store) -> bool

Return true if the object Store is the same as the provided Store.