Struct OptionalRuntimeObserver 

pub struct OptionalRuntimeObserver<'o>(pub Option<&'o mut dyn RuntimeObserver>);

Runtime observer that is optimised for the case where no observer is being used.

The trait RuntimeObserver is implemented on the Optional. This removes the dynamic dispatch overhead when no observer is being used.

Tuple Fields

0: Option<&'o mut dyn RuntimeObserver>

Trait Implementations

impl<'o> From<&'o mut dyn RuntimeObserver> for OptionalRuntimeObserver<'o>

fn from(val: &'o mut dyn RuntimeObserver) -> Self

Converts to this type from the input type.

impl<'o> RuntimeObserver for OptionalRuntimeObserver<'o>

fn observe_enter_call_frame( &mut self, arg_count: usize, lambda: &Rc<Lambda>, call_depth: usize, )

Called when the runtime enters a new call frame.

fn observe_exit_call_frame(&mut self, frame_at: usize, stack: &[Value])

Called when the runtime exits a call frame.

fn observe_suspend_call_frame(&mut self, frame_at: usize, stack: &[Value])

Called when the runtime suspends a call frame.

fn observe_enter_generator( &mut self, frame_at: usize, name: &str, stack: &[Value], )

Called when the runtime enters a generator frame.

fn observe_exit_generator( &mut self, frame_at: usize, name: &str, stack: &[Value], )

Called when the runtime exits a generator frame.

fn observe_suspend_generator( &mut self, frame_at: usize, name: &str, stack: &[Value], )

Called when the runtime suspends a generator frame.

fn observe_generator_request(&mut self, name: &str, msg: &VMRequest)

Called when a generator requests an action from the VM.

fn observe_tail_call(&mut self, frame_at: usize, lambda: &Rc<Lambda>)

Called when the runtime replaces the current call frame for a tail call.

fn observe_enter_builtin(&mut self, name: &'static str)

Called when the runtime enters a builtin.

fn observe_exit_builtin(&mut self, name: &'static str, stack: &[Value])

Called when the runtime exits a builtin.

fn observe_execute_op(&mut self, ip: CodeIdx, op: &Op, stack: &[Value])

Called when the runtime begins executing an instruction. The provided stack is the state at the beginning of the operation.