///
/// assert_eq!(&*lazy, "HELLO, WORLD!");
/// ```
+ #[inline]
#[unstable(feature = "once_cell", issue = "74465")]
pub const fn new(init: F) -> LazyCell<T, F> {
LazyCell { cell: OnceCell::new(), init: Cell::new(Some(init)) }
/// assert_eq!(LazyCell::force(&lazy), &92);
/// assert_eq!(&*lazy, &92);
/// ```
+ #[inline]
#[unstable(feature = "once_cell", issue = "74465")]
pub fn force(this: &LazyCell<T, F>) -> &T {
this.cell.get_or_init(|| match this.init.take() {
#[unstable(feature = "once_cell", issue = "74465")]
impl<T, F: FnOnce() -> T> Deref for LazyCell<T, F> {
type Target = T;
+ #[inline]
fn deref(&self) -> &T {
LazyCell::force(self)
}
#[unstable(feature = "once_cell", issue = "74465")]
impl<T: Default> Default for LazyCell<T> {
/// Creates a new lazy value using `Default` as the initializing function.
+ #[inline]
fn default() -> LazyCell<T> {
LazyCell::new(T::default)
}