Module tidyview 

TidyView — the virtual frame engine.

A TidyView is a zero-copy lens over shared columnar data: an Rc<DataFrame> base, a BitMask recording which rows are visible, a ProjectionMap for column selection, and an optional ordering permutation.

Filters don’t copy data — they flip bits. Selects don’t copy data — they narrow the projection. The original data is never modified.

Structs

ArrangeKey

A sort key for arrange().

GroupIndex

Index over groups, in first-occurrence order.

GroupMeta

Metadata for one group: key values + row indices.

GroupedTidyView

A TidyView with an associated group index.

ProjectionMap

Tracks which columns are visible after select().

TidyView

Zero-copy virtual view over a shared DataFrame.

Enums

TidyAgg

Aggregation functions for summarise().

TidyError

Error type for TidyView operations.