[−][src]Struct cntrlr::sync::Once

pub struct Once<T> { /* fields omitted */ }

A value which can be initalized only once

Implementations

impl<T> Once<T>[src]

pub const fn new() -> Self[src]

Create a new, uninitialized Once

pub fn get_or_try_init<F>(&self, f: F) -> Option<&T> where
    F: FnOnce() -> Option<T>, [src]

Initialize the stored value if needed, then return it.

Trait Implementations

impl<T: Send> Send for Once<T>[src]

impl<T> Sync for Once<T>[src]

Auto Trait Implementations

impl<T> Unpin for Once<T> where
    T: Unpin, [src]

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized, [src]

impl<T> Borrow<T> for T where
    T: ?Sized, [src]

impl<T> BorrowMut<T> for T where
    T: ?Sized, [src]

impl<T> From<T> for T[src]

impl<T, U> Into<U> for T where
    U: From<T>, [src]

impl<T, U> TryFrom<U> for T where
    U: Into<T>, [src]

type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, [src]

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.