https://ask.clojure.org/index.php/tag/malli https://ask.clojure.org/index.php/12956/macro-expansion-hooks-similar-to-clojure-spec <p><code>clojure.spec.alpha</code> currently holds a privileged position as a core library for Clojure core, being able to instrument macros as well as functions. <code>Compiler.java</code> relies on <code>clojure.spec.alpha</code> in <a rel="nofollow" href="https://github.com/clojure/clojure/blob/4090f405466ea90bbaf3addbe41f0a6acb164dbb/src/jvm/clojure/lang/Compiler.java#L6967">this function</a>, calling <a rel="nofollow" href="https://github.com/clojure/spec.alpha/blob/70f26984ee171f816eee6b162b563d403a49bfe8/src/main/clojure/clojure/spec/alpha.clj#L702">macroexpand-check</a> specifically. This is a neat interaction and <code>macroexpand-check</code> is simple and obvious.</p> <p>Other tools (such as Malli) can provide instrumentation for Clojure functions through <code>alter-var-root</code> (as seen <a rel="nofollow" href="https://github.com/metosin/malli/blob/1a735fe5550b7dccf0832433f2f6d68ce9355edc/src/malli/instrument.clj#L28">in malli.instrument/-strument!</a>), but they lack the ability to hook into macro-expansions.</p> <p>It would be nice if <code>Compiler.checkSpecs</code> had some hook to allow for tools such as Malli to be used to instrument macros.</p> Compiler https://ask.clojure.org/index.php/12956/macro-expansion-hooks-similar-to-clojure-spec Tue, 23 May 2023 14:18:10 +0000