Struct StubInstance

pub struct StubInstance<UserData = ()> { /* private fields */ }

A stub Wasm instance.

This is when a Wasm instance type is needed for type-checking but is not needed during runtime.

Trait Implementations

impl<UserData> Default for StubInstance<UserData>

fn default() -> Self

Returns the “default value” for a type.

impl<UserData> Instance for StubInstance<UserData>

type Runtime = StubRuntime

The runtime this instance is running in.

type UserData = UserData

Custom user data stored in the instance.

type UserDataReference<'a> = &'a UserData where Self::UserData: 'a, Self: 'a

A reference to the custom user data stored in the instance.

type UserDataMutReference<'a> = &'a mut UserData where Self::UserData: 'a, Self: 'a

A mutable reference to the custom user data stored in the instance.

fn load_export(&mut self, _name: &str) -> Option<()>

Loads an export from the guest module.

fn user_data(&self) -> Self::UserDataReference<'_>

Returns a reference to the custom user data stored in this instance.

fn user_data_mut(&mut self) -> Self::UserDataMutReference<'_>

Returns a mutable reference to the custom user data stored in this instance.

impl<Parameters, Results, UserData> InstanceWithFunction<Parameters, Results> for StubInstance<UserData>

where Parameters: FlatLayout + 'static, Results: FlatLayout + 'static,

type Function = ()

The runtime-specific type to represent the function.

fn function_from_export( &mut self, _name: <Self::Runtime as Runtime>::Export, ) -> Result<Option<Self::Function>, RuntimeError>

Converts an export into a function, if it is one.

fn call( &mut self, _function: &Self::Function, _parameters: Parameters, ) -> Result<Results, RuntimeError>

Calls the function from this instance using the specified parameters.

fn load_function(&mut self, name: &str) -> Result<Self::Function, RuntimeError>

Loads a function from the guest Wasm instance.

impl<UserData> InstanceWithMemory for StubInstance<UserData>

fn memory_from_export( &self, _export: (), ) -> Result<Option<StubMemory>, RuntimeError>

Converts an export into the runtime’s specific memory type.

fn memory(&mut self) -> Result<Memory<'_, Self>, RuntimeError>

Returns the memory export from the current Wasm module instance.