Simple CRDT in Rust

A conflict-free replicated data type (CRDT) is a data structure that can be replicated, each replica can be updated independently and it is always mathematically possible to merge the replicas back without conflicts. The simplest CRDT is an append only Set, where the merge is the Set union, building upon this idea we can compose more complex data types. In this talk we will explore how to implement a cli for a CRDT shopping list, see how Traits are emerging during the code evolution, use cargo to include some useful crates with no pain, and document the code with runnable examples.