[−][src]Struct once_cell::race::OnceBox
Implementations
impl<T> OnceBox<T>
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pub const fn new() -> OnceBox<T>
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pub fn get(&self) -> Option<&T>
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pub fn set(&self, value: T) -> Result<(), ()>
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pub fn get_or_init<F>(&self, f: F) -> &T where
F: FnOnce() -> T,
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F: FnOnce() -> T,
pub fn get_or_try_init<F, E>(&self, f: F) -> Result<&T, E> where
F: FnOnce() -> Result<T, E>,
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F: FnOnce() -> Result<T, E>,
Trait Implementations
impl<T: Debug> Debug for OnceBox<T>
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impl<T: Default> Default for OnceBox<T>
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impl<T> Drop for OnceBox<T>
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impl<T: Sync + Send> Sync for OnceBox<T>
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ⓘThis example deliberately fails to compile
struct S(*mut ()); unsafe impl Sync for S {} fn share<T: Sync>(_: &T) {} share(&once_cell::race::OnceBox::<S>::new());
Auto Trait Implementations
impl<T> RefUnwindSafe for OnceBox<T> where
T: RefUnwindSafe,
T: RefUnwindSafe,
impl<T> Send for OnceBox<T> where
T: Send,
T: Send,
impl<T> Unpin for OnceBox<T>
impl<T> UnwindSafe for OnceBox<T> where
T: RefUnwindSafe + UnwindSafe,
T: RefUnwindSafe + UnwindSafe,
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
pub fn borrow_mut(&mut self) -> &mut T
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impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,