immer: immer (persistent and immutable data structures for C++) immer: immer: immer is a library of persistent and immutable data structures written immer: in C++. These enable whole new kinds of architectures for interactive immer: and concurrent programs of striking simplicity, correctness, and immer: performance. immer: immer: Homepage: https://github.com/arximboldi/immer immer: immer: immer: