Struct Slot 

pub struct Slot<T> { /* private fields */ }

A slot that can hold a value, with lazy initialization.

Implementations

impl<T> Slot<T>

pub fn empty() -> Self

Creates an empty slot.

pub fn fill(&mut self, val: T)

Fills the slot with val. Panics if already filled.

pub fn get(&self) -> Option<&T>

Returns the slot’s value, or None.

pub fn is_filled(&self) -> bool

Returns true if the slot is filled.

pub fn take(&mut self) -> Option<T>

Takes the value out of the slot.

pub fn get_or_fill_with(&mut self, f: impl FnOnce() -> T) -> &T

Fills the slot if empty, returning a reference to the value.

Trait Implementations

impl<T> Default for Slot<T>

fn default() -> Self

Returns the “default value” for a type.