• Guardrails: Efficient, hassle-free function call validation with a concise inline syntax for clojure.spec and Malli
• Malli: High-performance data-driven data specification library for Clojure/Script.

This super mini Clojure + ClojureScript project demonstrates:

• How to use the declarative versions of malli.util transformation schemas with Guardrails
• How to use the Guardrails registry with regular Malli validation
  • NB: This only seems to work if Guardrails is enabled. See note in the source code.
• A way to make Guardrails use a custom mutable Malli registry, as a way to share schemas between Guardrails and regular Malli validations.

The relevant code is in src/main/guarded.cljc src/main/registry.cljc. And in src/main/guarded2.cljc there's code to try in both the Clojure and the ClojureScript REPL. With or without Guardrails enabled.

NB: Guardrails is enabled via JVM opts in deps.edn. To disable it for shadow-cljs you need to remove the :dev alias from the :deps entry in shadow-cljs.

Happy guarded coding! ❤️