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LazyLock

o1_utils::lazy_lock

Struct LazyLock 

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pub struct LazyLock<T, F = fn() -> T> {
    inner: LazyLock<T, F>,
}
Expand description

A thread-safe, lazily-initialized value.

Constructed with a function (typically fn() -> T) so that it can be used in static items via LazyLock::new, which is const.

§Examples

use o1_utils::lazy_lock::LazyLock;

static VALUE: LazyLock<u64> = LazyLock::new(|| 1 + 2);

assert_eq!(*VALUE, 3);

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§inner: LazyLock<T, F>

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impl<T, F: FnOnce() -> T> LazyLock<T, F>

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pub const fn new(init: F) -> Self

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impl<T, F: FnOnce() -> T> Deref for LazyLock<T, F>

Available on crate feature std only.
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type Target = T

The resulting type after dereferencing.
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fn deref(&self) -> &T

Dereferences the value.

Auto Trait Implementations§

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impl<T, F = fn() -> T> !Freeze for LazyLock<T, F>

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impl<T, F> RefUnwindSafe for LazyLock<T, F>
where T: RefUnwindSafe + UnwindSafe, F: UnwindSafe,

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impl<T, F> Send for LazyLock<T, F>
where T: Send, F: Send,

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impl<T, F> Sync for LazyLock<T, F>
where T: Sync + Send, F: Send,

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impl<T, F> Unpin for LazyLock<T, F>
where T: Unpin, F: Unpin,

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impl<T, F> UnsafeUnpin for LazyLock<T, F>
where T: UnsafeUnpin, F: UnsafeUnpin,

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impl<T, F> UnwindSafe for LazyLock<T, F>
where T: UnwindSafe, F: UnwindSafe,

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> Pointable for T

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const ALIGN: usize

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<P, T> Receiver for P
where P: Deref<Target = T> + ?Sized, T: ?Sized,

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type Target = T

🔬This is a nightly-only experimental API. (arbitrary_self_types)
The target type on which the method may be called.
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V