Struct NoReentry 

pub struct NoReentry;

A Reentry for a caller that has no interpreter to reenter.

HostRegistry::call uses it, so a host that never runs a callback can still be driven from a test or a tool with no program behind it. An operation that does need one is told what is missing rather than being handed a closure it cannot run.

Trait Implementations

impl Reentry for NoReentry

fn time_left(&self) -> Option<Duration>

A caller with no run behind it has no deadline to run out of, so a host driven from a test or a tool waits for as long as its own limits allow and no less.

fn task(&self) -> u64

A caller with no program behind it made the call the way an entry makes one: outside any spawned task.

fn call( &mut self, callee: &Value, _args: Vec<Value>, ) -> Result<Value, RuntimeError>

Calls callee with args and answers what it produced.

fn call_until( &mut self, callee: &Value, args: Vec<Value>, _stop: &Cancellation, ) -> Result<Value, RuntimeError>

Calls callee with args, stopping it at its next safepoint if stop is raised while it runs.

fn is_cancelled(&self) -> bool

Whether the work that made this host call has been asked to stop.