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ColPtr

miniextendr_api::dataframe_builder

Struct ColPtr 

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struct ColPtr(*mut ());
Expand description

Send+Sync wrapper for a raw column-data pointer carried across the flatten boundary. The pointer addresses R-owned memory for native columns or a Vec<Option<String>> backing buffer for character columns. Disjointness (per column and per row-range within a column) is the caller’s invariant — see the safety argument on RDataFrameBuilder.

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§0: *mut ()

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impl ColPtr

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fn cast<T>(&self) -> *mut T

Reinterpret the erased base pointer as *mut T.

Taking &self (a method call on the whole struct) makes a capturing closure capture the Send + Sync ColPtr as a whole rather than its raw *mut () field (which is neither), keeping the closure Send + Sync.

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impl Clone for ColPtr

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fn clone(&self) -> ColPtr

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Copy for ColPtr

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impl Send for ColPtr

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impl Sync for ColPtr

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impl TrivialClone for ColPtr

Auto Trait 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> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. 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> RClone for T
where T: Clone,

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fn clone(&self) -> T

Create a deep copy of this value.
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impl<T> RCopy for T
where T: Copy,

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fn copy(&self) -> T

Create a bitwise copy of this value. Read more
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fn is_copy(&self) -> bool

Check if this type implements Copy. Read more
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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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impl<T> SizedTypeProperties for T

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#[doc(hidden)]
const SIZE: usize = _

🔬This is a nightly-only experimental API. (sized_type_properties)
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#[doc(hidden)]
const ALIGN: usize = _

🔬This is a nightly-only experimental API. (sized_type_properties)
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#[doc(hidden)]
const ALIGNMENT: Alignment = _

🔬This is a nightly-only experimental API. (ptr_alignment_type)
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#[doc(hidden)]
const IS_ZST: bool = _

🔬This is a nightly-only experimental API. (sized_type_properties)
true if this type requires no storage. false if its size is greater than zero. Read more
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#[doc(hidden)]
const LAYOUT: Layout = _

🔬This is a nightly-only experimental API. (sized_type_properties)
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#[doc(hidden)]
const MAX_SLICE_LEN: usize = _

🔬This is a nightly-only experimental API. (sized_type_properties)
The largest safe length for a [Self]. Read more
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. 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.

Layout§

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 8 bytes