Struct Lazy

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pub struct Lazy<T> { /* private fields */ }

Expand description

Lazy-loaded value that is computed on first access

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impl<T> Lazy<T>

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pub fn new<F>(initializer: F) -> Self
where F: Fn() -> Result<T> + Send + Sync + 'static,

Create a new lazy value

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pub fn get(&self) -> Result<&T>

Get the value, computing it if necessary

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pub fn is_initialized(&self) -> bool

Check if the value has been initialized

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pub fn initialize(&self) -> Result<()>

Force initialization without returning the value

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pub fn clear(&self)

Clear the lazy value, forcing re-initialization on next access

Auto Trait Implementations§

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impl<T> Send for Lazy<T>
where RwLock<Option<T>>: Send, Box<dyn Fn() -> Result<T, ChessEngineError> + Send + Sync>: Send,

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impl<T> Sync for Lazy<T>
where RwLock<Option<T>>: Sync, Box<dyn Fn() -> Result<T, ChessEngineError> + Send + Sync>: Sync,

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impl<T> Unpin for Lazy<T>
where RwLock<Option<T>>: Unpin, Box<dyn Fn() -> Result<T, ChessEngineError> + Send + Sync>: Unpin,

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impl<T> UnsafeUnpin for Lazy<T>
where RwLock<Option<T>>: UnsafeUnpin, Box<dyn Fn() -> Result<T, ChessEngineError> + Send + Sync>: UnsafeUnpin,

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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> ErasedDestructor for T
where T: 'static,

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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> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self> ⓘ

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

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fn in_current_span(self) -> Instrumented<Self> ⓘ

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

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impl<T, U> Into 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> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self> ⓘ

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self> ⓘ
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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