Enum Extern

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

An external item to a WebAssembly module, or a list of what can possibly be exported from a wasm module.

This is both returned from Instance::exports as well as required by Instance::new. In other words, this is the type of extracted values from an instantiated module, and it’s also used to provide imported values when instantiating a module.

Variants

Func(Func)

A WebAssembly func which can be called.

Global(Global)

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

Table(Table)

A WebAssembly table which is an array of Val types.

Memory(Memory)

A WebAssembly linear memory.

Implementations

impl Extern

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

Returns the underlying Func, if this external is a function.

Returns None if this is not a function.

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

Returns the underlying Global, if this external is a global.

Returns None if this is not a global.

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

Returns the underlying Table, if this external is a table.

Returns None if this is not a table.

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

Returns the underlying Memory, if this external is a memory.

Returns None if this is not a memory.

pub fn ty(&self) -> ExternType

Returns the type associated with this Extern.

Trait Implementations

impl Clone for Extern

fn clone(&self) -> Extern

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl From<Func> for Extern

fn from(r: Func) -> Self

Converts to this type from the input type.

impl From<Global> for Extern

fn from(r: Global) -> Self

Converts to this type from the input type.

impl From<Memory> for Extern

fn from(r: Memory) -> Self

Converts to this type from the input type.

impl From<Table> for Extern

fn from(r: Table) -> Self

Converts to this type from the input type.