Enum Extern 

pub enum Extern<E: WasmEngine> {
    Global(E::Global),
    Table(E::Table),
    Memory(E::Memory),
    Func(E::Func),
}

An external item to a WebAssembly module.

This is returned from Instance::exports or Instance::get_export.

Variants

Global(E::Global)

A WebAssembly global which acts like a Cell<T> of sorts, supporting get and set operations.

Table(E::Table)

A WebAssembly table which is an array of funtion references.

Memory(E::Memory)

A WebAssembly linear memory.

Func(E::Func)

A WebAssembly function which can be called.

Implementations

impl<E: WasmEngine> Extern<E>

pub fn into_global(self) -> Option<E::Global>

Returns the underlying global variable if self is a global variable.

Returns None otherwise.

pub fn into_table(self) -> Option<E::Table>

Returns the underlying table if self is a table.

Returns None otherwise.

pub fn into_memory(self) -> Option<E::Memory>

Returns the underlying linear memory if self is a linear memory.

Returns None otherwise.

pub fn into_func(self) -> Option<E::Func>

Returns the underlying function if self is a function.

Returns None otherwise.

pub fn ty(&self, ctx: impl AsContext<E>) -> ExternType

Returns the type associated with this Extern.

Panics

If this item does not belong to the store provided.

Trait Implementations

impl<E: WasmEngine> Clone for Extern<E>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<E: WasmEngine> Debug for Extern<E>

where E::Global: Debug, E::Func: Debug, E::Memory: Debug, E::Table: Debug,

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

Formats the value using the given formatter.

impl<E: WasmEngine> From<&Extern<E>> for Extern

fn from(value: &Extern<E>) -> Self

Converts to this type from the input type.

impl<E: WasmEngine> From<&Extern> for Extern<E>

fn from(value: &Extern) -> Self

Converts to this type from the input type.