Struct Noop

pub struct Noop<Cur: Sandbox, Next: Sandbox> { /* private fields */ }

Transition metadata that contains and does nothing. Noop is a placeholder when you want to implement an EvolvableSandbox or DevolvableSandbox that needs no additional metadata to succeed.

Construct one of these by using the default() method.

Trait Implementations

impl<Cur: Sandbox, Next: Sandbox> Default for Noop<Cur, Next>

fn default() -> Self

Returns the “default value” for a type.

impl DevolvableSandbox<MultiUseSandbox, MultiUseSandbox, Noop<MultiUseSandbox, MultiUseSandbox>> for MultiUseSandbox

fn devolve( self, _tsn: Noop<MultiUseSandbox, MultiUseSandbox>, ) -> Result<MultiUseSandbox>

Consume self and move it back to a MultiUseSandbox with previous state.

The purpose of this function is to allow multiple states to be associated with a single MultiUseSandbox.

An implementation such as HyperlightJs or HyperlightWasm can use this to call guest functions to load JS or WASM code and then evolve the sandbox causing state to be captured. The new MultiUseSandbox can then be used to call guest functions to execute the loaded code. The devolve can be used to return the MultiUseSandbox to the state before the code was loaded. Thus avoiding initialisation overhead

impl EvolvableSandbox<UninitializedSandbox, MultiUseSandbox, Noop<UninitializedSandbox, MultiUseSandbox>> for UninitializedSandbox

fn evolve( self, _: Noop<UninitializedSandbox, MultiUseSandbox>, ) -> Result<MultiUseSandbox>

Evolve self to a MultiUseSandbox without any additional metadata.

impl<Cur: Sandbox, Next: Sandbox> TransitionMetadata<Cur, Next> for Noop<Cur, Next>