Struct NoMail 

pub struct NoMail;

Every operation throws, so a bare evaluator is usable and a stray send is catchable rather than a panic.

Trait Implementations

impl Default for NoMail

fn default() -> NoMail

Returns the “default value” for a type.

impl Mail for NoMail

fn spawn(&mut self, _: Val) -> Result<Val, Val>

fn send(&mut self, _: &Val, _: Val) -> Result<Val, Val>

fn receive(&mut self) -> Option<Val>

None means the mailbox is empty, which is the only reason anything in this machine ever blocks.

fn monitor(&mut self, _: &Val) -> Result<Val, Val>

fn limit(&mut self, _: &Val, _: i64) -> Result<Val, Val>