Elixir v1.18 released: type checking of calls, LSP listeners, built-in JSON, and more

Elixir v1.18 is an impressive release with improvements across the two main efforts happening within the Elixir ecosystem right now: set-theoretic types and language servers. It also comes with built-in JSON support and adds new capabilities to its unit testing library. Let’s go over each of those in detail. Type inference of patterns and return types There are several updates in the typing department, so let’s break them down. A type system? In my Elixir? There is an on-going research and development effor