LateInit

dilib::late_init

Struct LateInit 

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pub struct LateInit<T, Arg, F = fn(Arg) -> T> { /* private fields */ }
Expand description

A Lazy<T> that takes an argument.

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impl<T, Arg, F> LateInit<T, Arg, F>

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

Constructs a new LateInit<T> with the given function.

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

Returns Some(&T) if the value has been initialized, None otherwise.

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pub fn is_init(&self) -> bool

Returns true if the value has been initialized.

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impl<T, Arg, F> LateInit<T, Arg, F>
where F: FnOnce(Arg) -> T,

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pub fn get_or_init(&self, arg: Arg) -> &T

Initializes the instance if it has not been initialized and returns a reference to the value.

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impl<T, Arg, F: Send> Sync for LateInit<T, Arg, F>

Auto Trait Implementations§

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

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impl<T, Arg, F = fn(Arg) -> T> !RefUnwindSafe for LateInit<T, Arg, F>

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impl<T, Arg, F> Send for LateInit<T, Arg, F>
where Arg: Send, T: Send, F: Send,

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impl<T, Arg, F> Unpin for LateInit<T, Arg, F>
where Arg: Unpin, F: Unpin, T: Unpin,

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impl<T, Arg, F> UnwindSafe for LateInit<T, Arg, F>
where Arg: UnwindSafe, 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, 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.