Struct Delay 

pub struct Delay {
    pub state: Mutex<DelayState>,
}

A lazy one-time computation (forced at most once, result cached).

Fields

state: Mutex<DelayState>

Implementations

impl Delay

pub fn new(thunk: Box<dyn Thunk>) -> Self

pub fn force(&self) -> Result<Value, String>

Force the delay and cache the result. Returns the value on success, or an error message on failure.

pub fn is_realized(&self) -> bool

True if the delay has already been forced.

Trait Implementations

impl Debug for Delay

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

Formats the value using the given formatter.

impl Trace for Delay

fn trace(&self, visitor: &mut MarkVisitor)

fn gc_size_extra(&self) -> usize