Module indexset 

Index set for managing ordered collections with bidirectional lookup.

IndexSet maintains insertion order while providing O(1) lookup in both directions: from positional index to value and from value to positional index. Duplicate insertions are silently ignored.

This is used throughout the TCI infrastructure for managing pivot indices in matrix cross interpolation algorithms.

Structs

IndexSet

A bidirectional index set for efficient lookup

Type Aliases

LocalIndex

A single site-local index.

MultiIndex

A multi-index: a vector of site-local indices.