(defn add [x : Int, y : Int] -> Int (+ x y)) But this also works:
(compute-stats data | log-result | write-to-db) It reads left-to-right, no nesting, no parentheses confusion. Like Clojure, Tlen’s data structures are persistent and immutable. But Tlen adds a lightweight ! annotation for local, controlled mutation when it actually makes code clearer. tlen lisp
But after a weekend of tinkering, I’m genuinely excited. Tlen Lisp isn’t trying to be the fastest or the most purely functional. Instead, it’s focused on something most Lisps overlook: . What Makes Tlen Different? Tlen Lisp keeps the classic homoiconic syntax (function args...) but introduces a few opinionated changes: 1. Pipeline-first semantics Inspired by Clojure’s -> and Elixir’s |> , Tlen makes the pipeline operator a core syntactic element , not just a macro. (defn add [x : Int, y : Int]