pub struct LazyCell<T, I = fn() -> T> { /* private fields */ }
Expand description

A lazily instantiated cell

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impl<T, I> LazyCell<T, I>

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

Creates a new lazy cell with the given initializer

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pub unsafe fn scope<F, FR>(&self, scope: F) -> FRwhere I: FnOnce() -> T, F: FnOnce(&mut T) -> FR,

Provides scoped access to the underlying value, initializes it if necessary

Safety

This function provides unchecked, mutable access to the underlying value, so incorrect use of this function may lead to race conditions or undefined behavior.

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pub fn scope_mut<F, FR>(&self, scope: F) -> FRwhere I: FnOnce() -> T, F: FnOnce(&mut T) -> FR,

Provides scoped access to the underlying value, initializes it if necessary

Auto Trait Implementations§

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impl<T, I = fn() -> T> !RefUnwindSafe for LazyCell<T, I>

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impl<T, I> Send for LazyCell<T, I>where I: Send, T: Send,

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impl<T, I = fn() -> T> !Sync for LazyCell<T, I>

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impl<T, I> Unpin for LazyCell<T, I>where I: Unpin, T: Unpin,

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impl<T, I> UnwindSafe for LazyCell<T, I>where I: UnwindSafe, T: UnwindSafe,

Blanket Implementations§

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impl<T> Any for Twhere 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 Twhere 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 Twhere 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 Twhere 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, U> TryFrom<U> for Twhere 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 Twhere 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.