Struct SelectionVector 

pub struct SelectionVector { /* private fields */ }

A selection vector indicating which rows are active.

Used for efficient filtering without copying data.

Implementations

impl SelectionVector

pub const MAX_CAPACITY: usize

Maximum capacity (limited to u16 for space efficiency).

pub fn new_all(count: usize) -> Self

Creates a new selection vector selecting all rows up to count.

pub fn new_empty() -> Self

Creates a new empty selection vector.

pub fn with_capacity(capacity: usize) -> Self

Creates a new selection vector with the given capacity.

pub fn from_predicate<F>(count: usize, predicate: F) -> Self

where F: Fn(usize) -> bool,

Creates a selection vector from a predicate.

Selects all indices where the predicate returns true.

pub fn len(&self) -> usize

Returns the number of selected rows.

pub fn is_empty(&self) -> bool

Returns true if no rows are selected.

pub fn get(&self, position: usize) -> Option<usize>

Gets the actual row index at position.

pub fn push(&mut self, index: usize)

Pushes a new index.

pub fn as_slice(&self) -> &[u16]

Returns the indices as a slice.

pub fn clear(&mut self)

Clears all selections.

pub fn filter<F>(&self, predicate: F) -> Self

where F: Fn(usize) -> bool,

Filters this selection by another predicate.

Returns a new selection containing only indices that pass the predicate.

pub fn intersect(&self, other: &Self) -> Self

Computes the intersection of two selection vectors.

pub fn union(&self, other: &Self) -> Self

Computes the union of two selection vectors.

pub fn iter(&self) -> impl Iterator<Item = usize> + '_

Returns an iterator over selected indices.

pub fn contains(&self, index: usize) -> bool

Checks if a given index is in the selection.

Trait Implementations

impl Clone for SelectionVector

fn clone(&self) -> SelectionVector

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SelectionVector

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for SelectionVector

fn default() -> Self

Returns the “default value” for a type.

impl IntoIterator for SelectionVector

type Item = usize

The type of the elements being iterated over.

type IntoIter = Map<IntoIter<u16>, fn(u16) -> usize>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.