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GeneratorSource

graphos_core::execution::source

Struct GeneratorSource 

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pub struct GeneratorSource<F>
where
    F: FnMut(usize) -> Option<Vec<Value>> + Send + Sync,
{ /* private fields */ }
Expand description

Source that generates values using a closure.

Useful for generating test data or for lazy evaluation.

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impl<F> GeneratorSource<F>
where F: FnMut(usize) -> Option<Vec<Value>> + Send + Sync,

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pub fn new(generator: F) -> Self

Create a new generator source.

Trait Implementations§

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impl<F> Source for GeneratorSource<F>
where F: FnMut(usize) -> Option<Vec<Value>> + Send + Sync,

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fn next_chunk( &mut self, chunk_size: usize, ) -> Result<Option<DataChunk>, OperatorError>

Produce the next chunk of data. Read more
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fn reset(&mut self)

Reset the source to its initial state.
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fn name(&self) -> &'static str

Name of this source for debugging.

Auto Trait Implementations§

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impl<F> Freeze for GeneratorSource<F>
where F: Freeze,

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impl<F> RefUnwindSafe for GeneratorSource<F>
where F: RefUnwindSafe,

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impl<F> Send for GeneratorSource<F>

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impl<F> Sync for GeneratorSource<F>

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impl<F> Unpin for GeneratorSource<F>
where F: Unpin,

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impl<F> UnwindSafe for GeneratorSource<F>
where F: UnwindSafe,

Blanket Implementations§

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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<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.