Enum wasmtime::Extern

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

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.

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Func(Func)

A WebAssembly func which can be called.

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Global(Global)

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

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Table(Table)

A WebAssembly table which is an array of Val reference types.

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Memory(Memory)

A WebAssembly linear memory.

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SharedMemory(SharedMemory)

A WebAssembly shared memory; these are handled separately from Memory.

Implementations§

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impl Extern

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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.

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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.

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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.

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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.

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pub fn into_shared_memory(self) -> Option<SharedMemory>

Returns the underlying SharedMemory, if this external is a shared memory.

Returns None if this is not a shared memory.

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pub fn ty(&self, store: impl AsContext) -> ExternType

Returns the type associated with this Extern.

The store argument provided must own this Extern and is used to look up type information.

§Panics

Panics if this item does not belong to the store provided.

Trait Implementations§

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impl Clone for Extern

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fn clone(&self) -> Extern

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Extern

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

Formats the value using the given formatter. Read more
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impl From<Func> for Extern

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fn from(r: Func) -> Self

Converts to this type from the input type.
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impl From<Global> for Extern

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fn from(r: Global) -> Self

Converts to this type from the input type.
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impl From<Memory> for Extern

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fn from(r: Memory) -> Self

Converts to this type from the input type.
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impl From<SharedMemory> for Extern

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fn from(r: SharedMemory) -> Self

Converts to this type from the input type.
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impl From<Table> for Extern

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fn from(r: Table) -> Self

Converts to this type from the input type.

Auto Trait Implementations§

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impl Freeze for Extern

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impl !RefUnwindSafe for Extern

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impl Send for Extern

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impl Sync for Extern

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impl Unpin for Extern

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impl !UnwindSafe for Extern

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> Pointable for T

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.