Module boolean_array_view 

BooleanArrayView Module - Windowed View over a BooleanArray

BooleanArrayV is a read-only, zero-copy view into a [offset .. offset + len) slice of a BooleanArray.

Purpose

• Provides windowed access to bit-packed boolean data without copying buffers.
• Allows null counts to be cached per view for faster repeated operations.

Behaviour

• Enables lightweight sub-ranges for use in downstream computations, filtering, or previews.
• Creating a view does not allocate; slicing is zero-copy.

Threading

• Thread-safe for sharing across threads (uses OnceLock for null count caching).
• Safe to share via Arc for parallel processing.

Interop

• Convert back to a full BooleanArray via to_boolean_array.
• Promote to Array via inner_array for unified API calls.

Invariants

• offset + len <= array.len()
• len is the logical number of boolean elements in the view.

Structs

BooleanArrayV

BooleanArrayView