Enum ColumnKind

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enum ColumnKind {
    Native(Sendable<SEXP>),
    Str(Vec<Option<String>>),
}

Expand description

How a column’s R storage is materialized after the fill.

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Native(Sendable<SEXP>)

Native column: the fill wrote directly into R memory; the SEXP is already complete. Holds the allocated (and currently protected) SEXP.

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Str(Vec<Option<String>>)

Character column: the fill computed Option<String> values into a Vec (no R API on fill threads). The CHARSXPs are set serially on the R thread during assembly. None becomes NA_character_.

Auto Trait Implementations§

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impl RefUnwindSafe for ColumnKind

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impl UnsafeUnpin for ColumnKind

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impl UnwindSafe for ColumnKind

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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 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> SizeHint for T
where T: ?Sized,

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default fn lower_bound(&self) -> usize

🔬This is a nightly-only experimental API. (core_io_internals)

Returns a lower bound on the number of elements this container-like item contains. For example, an array [u8; 12] could return any value between 0 and 12 inclusively as a correct implementation. Read more

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default fn upper_bound(&self) -> Option<usize>

🔬This is a nightly-only experimental API. (core_io_internals)

Returns an upper bound on the number of elements this container-like item contains if it can be determined, otherwise None. Read more

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final fn size_hint(&self) -> (usize, Option<usize>)

🔬This is a nightly-only experimental API. (core_io_internals)

Returns an estimate for the number of elements this container like type contains. Read more

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