Struct VMThunk 

pub struct VMThunk {
    pub state: Rc<Cell<Option<ThunkState>>>,
}

A lazy thunk with memoization and blackhole detection.

Fields

state: Rc<Cell<Option<ThunkState>>>

Implementations

impl VMThunk

pub fn new(chunk: Rc<Chunk>, upvalues: Vec<NanBox>) -> Self

Create a new pending thunk.

pub fn new_done(value: VMValue) -> Self

Create a thunk that is already evaluated (optimization).

pub fn new_native<F>(callback: F) -> Self

where F: Fn() -> Result<VMValue, VMError> + 'static,

Create a native callback thunk from a Rust closure.

The callback is invoked lazily the first time the thunk is forced, and the result is memoized. Used by the builtin bridge to wrap tree-walker computations that should be deferred.

Trait Implementations

impl Clone for VMThunk

fn clone(&self) -> VMThunk

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for VMThunk

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.