Struct WindowedIterRealData 

pub struct WindowedIterRealData<I: Iterator<Item = f64>> {
    state: WindowedIterState<I, f64>,
}

Windowed iterator-backed real (f64) vector data.

Like super::IterRealData, but only keeps a sliding window of elements in memory. Sequential forward access within the window is O(1). Access outside the window triggers full materialization.

Fields

state: WindowedIterState<I, f64>

Implementations

impl<I: Iterator<Item = f64>> WindowedIterRealData<I>

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

Create from an iterator with explicit length and window size.

impl<I: ExactSizeIterator<Item = f64>> WindowedIterRealData<I>

pub fn from_exact_iter(iter: I, window_size: usize) -> Self

Create from an ExactSizeIterator with window size (length auto-detected).

Trait Implementations

impl<I: Iterator<Item = f64> + 'static> AltReal for WindowedIterRealData<I>

const HAS_ELT: bool = true

Set to true to register elt.

const HAS_GET_REGION: bool = true

Set to true to register get_region.

fn elt(x: SEXP, i: R_xlen_t) -> f64

Get element at index.

fn get_region( x: SEXP, start: R_xlen_t, len: R_xlen_t, buf: &mut [f64], ) -> R_xlen_t

Bulk read elements into buffer.

const HAS_IS_SORTED: bool = false

Set to true to register is_sorted.

fn is_sorted(_x: SEXP) -> i32

Sortedness hint.

const HAS_NO_NA: bool = false

Set to true to register no_na.

fn no_na(_x: SEXP) -> i32

NA-free hint.

const HAS_SUM: bool = false

Set to true to register sum.

fn sum(_x: SEXP, _narm: bool) -> SEXP

Optimized sum.

const HAS_MIN: bool = false

Set to true to register min.

fn min(_x: SEXP, _narm: bool) -> SEXP

Optimized min.

const HAS_MAX: bool = false

Set to true to register max.

fn max(_x: SEXP, _narm: bool) -> SEXP

Optimized max.

impl<I: Iterator<Item = f64>> AltRealData for WindowedIterRealData<I>

fn elt(&self, i: usize) -> f64

Get the real element at index i.

fn as_slice(&self) -> Option<&[f64]>

Optional: return a pointer to contiguous data if available.

fn get_region(&self, start: usize, len: usize, buf: &mut [f64]) -> usize

Optional: bulk read into buffer (clamped to available data).

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

Optional: sortedness hint.

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

Optional: does this vector contain any NA values?

fn sum(&self, _na_rm: bool) -> Option<f64>

Optional: optimized sum.

fn min(&self, _na_rm: bool) -> Option<f64>

Optional: optimized min.

fn max(&self, _na_rm: bool) -> Option<f64>

Optional: optimized max.

impl<I: Iterator<Item = f64> + 'static> AltVec for WindowedIterRealData<I>

const HAS_DATAPTR: bool = false

Set to true to register dataptr.

fn dataptr(_x: SEXP, _writable: bool) -> *mut c_void

Get raw data pointer.

const HAS_DATAPTR_OR_NULL: bool = false

Set to true to register dataptr_or_null.

fn dataptr_or_null(_x: SEXP) -> *const c_void

Get data pointer without forcing materialization.

const HAS_EXTRACT_SUBSET: bool = false

Set to true to register extract_subset.

fn extract_subset(_x: SEXP, _indx: SEXP, _call: SEXP) -> SEXP

Optimized subsetting.

impl<I: Iterator<Item = f64> + 'static> Altrep for WindowedIterRealData<I>

fn length(x: SEXP) -> R_xlen_t

Returns the length of the ALTREP vector. This is REQUIRED - R cannot determine vector length without it.

const GUARD: AltrepGuard = AltrepGuard::RUnwind

The guard mode for all ALTREP trampolines on this type.

const HAS_SERIALIZED_STATE: bool = false

Set to true to register serialized_state.

fn serialized_state(_x: SEXP) -> SEXP

Return serialization state.

const HAS_UNSERIALIZE: bool = false

Set to true to register unserialize.

fn unserialize(_class: SEXP, _state: SEXP) -> SEXP

Reconstruct ALTREP from serialized state.

const HAS_UNSERIALIZE_EX: bool = false

Set to true to register unserialize_ex.

fn unserialize_ex( _class: SEXP, _state: SEXP, _attr: SEXP, _objf: i32, _levs: i32, ) -> SEXP

Extended unserialization with attributes.

const HAS_DUPLICATE: bool = false

Set to true to register duplicate.

fn duplicate(_x: SEXP, _deep: bool) -> SEXP

Duplicate the ALTREP object.

const HAS_DUPLICATE_EX: bool = false

Set to true to register duplicate_ex.

fn duplicate_ex(_x: SEXP, _deep: bool) -> SEXP

Extended duplication.

const HAS_COERCE: bool = false

Set to true to register coerce.

fn coerce(_x: SEXP, _to_type: SEXPTYPE) -> SEXP

Coerce to another type.

const HAS_INSPECT: bool = false

Set to true to register inspect.

fn inspect( _x: SEXP, _pre: i32, _deep: i32, _pvec: i32, _inspect_subtree: Option<unsafe extern "C-unwind" fn(SEXP, i32, i32, i32)>, ) -> bool

Custom inspection for .Internal(inspect()).

impl<I: Iterator<Item = f64>> AltrepLen for WindowedIterRealData<I>

fn len(&self) -> usize

Returns the length of this ALTREP vector.

fn is_empty(&self) -> bool

Returns true if the vector is empty.

impl<I: Iterator<Item = f64> + 'static> InferBase for WindowedIterRealData<I>

const BASE: RBase = crate::altrep::RBase::Real

The inferred R base type.

unsafe fn make_class( class_name: *const i8, pkg_name: *const i8, ) -> R_altrep_class_t

Create the ALTREP class handle.

unsafe fn install_methods(cls: R_altrep_class_t)

Install ALTREP methods on the class.

impl<I: Iterator<Item = f64> + 'static> TypedExternal for WindowedIterRealData<I>

const TYPE_NAME: &'static str = "WindowedIterRealData"

The type name as a static string (for debugging and display)

const TYPE_NAME_CSTR: &'static [u8] = b"WindowedIterRealData\0"

The type name as a null-terminated C string (for R tag display)

const TYPE_ID_CSTR: &'static [u8] = b"miniextendr_api::altrep::WindowedIterRealData\0"

Namespaced type ID as a null-terminated C string (for type checking).