Struct SyncOnceCell 

pub struct SyncOnceCell<T>(/* private fields */);

A cell that provides lazy one-time initialization that implements Sync and Send.

This module is a stub when no std is available to swap with std::sync::OnceLock.

Implementations

impl<T> SyncOnceCell<T>

where T: Debug,

pub fn new() -> SyncOnceCell<T>

Create a new once.

pub fn initialized(value: T) -> SyncOnceCell<T>

Initialize the cell with a value.

pub fn get_or_init<F>(&self, f: F) -> &T

where F: FnOnce() -> T,

Gets the contents of the cell, initializing it with f if the cell was empty.

Trait Implementations

impl<T> Default for SyncOnceCell<T>

where T: Debug,

fn default() -> SyncOnceCell<T>

Returns the “default value” for a type.