Struct IterIntCoerceData 

pub struct IterIntCoerceData<I, T>
where
    I: Iterator<Item = T>,
    T: Coerce<i32> + Copy,
{
    state: IterState<I, T>,
}

Iterator-backed integer vector data adaptor with coercion from any integer-like type.

Wraps an iterator producing values that coerce to i32 (e.g., u16, i8, etc.) and implements the data-level traits (AltrepLen + AltIntegerData). To expose it to R, wrap it in a #[derive(AltrepInteger)] + #[altrep(manual)] struct (see the module docs).

Example

use miniextendr_api::altrep_data::IterIntCoerceData;

// Create from an iterator of u16 values
let iter = (0..10u16).map(|x| x * 100);
let data = IterIntCoerceData::from_iter(iter, 10);
// Values are coerced from u16 to i32 when accessed

Fields

state: IterState<I, T>

Implementations

impl<I, T> IterIntCoerceData<I, T>

where I: Iterator<Item = T>, T: Coerce<i32> + Copy,

pub fn from_iter(iter: I, len: usize) -> Self

Create from an iterator with explicit length.

impl<I, T> IterIntCoerceData<I, T>

where I: ExactSizeIterator<Item = T>, T: Coerce<i32> + Copy,

pub fn from_exact_iter(iter: I) -> Self

Create from an ExactSizeIterator (length auto-detected).

Trait Implementations

impl<I, T> AltIntegerData for IterIntCoerceData<I, T>

where I: Iterator<Item = T>, T: Coerce<i32> + Copy,

fn elt(&self, i: usize) -> i32

Get the integer element at index i.

fn as_slice(&self) -> Option<&[i32]>

Optional: return a pointer to contiguous data if available. Default returns None (no contiguous backing).

fn get_region(&self, start: usize, len: usize, buf: &mut [i32]) -> usize

Optional: bulk read into buffer. Returns number of elements read.

fn is_sorted(&self) -> Option<Sortedness>

Optional: sortedness hint. Default is unknown.

fn no_na(&self) -> Option<bool>

Optional: does this vector contain any NA values?

fn sum(&self, _na_rm: bool) -> Option<i64>

Optional: optimized sum. Default returns None (use R’s default).

fn min(&self, _na_rm: bool) -> Option<i32>

Optional: optimized min. Default returns None (use R’s default).

fn max(&self, _na_rm: bool) -> Option<i32>

Optional: optimized max. Default returns None (use R’s default).

impl<I, T> AltrepLen for IterIntCoerceData<I, T>

where I: Iterator<Item = T>, T: Coerce<i32> + Copy,

fn len(&self) -> usize

Returns the length of this ALTREP vector.

fn is_empty(&self) -> bool

Returns true if the vector is empty.

Layout

Note: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.