Clojure-style discarding

changelog.md

@@ -13,6 +13,7 @@ deprecated forms.
 * Stack traces from macro errors shouldn't contain compiler internals.
 * Look for macros in `.fnlm` files in addition to `.fnl` files.
 * Support `extra-env` in compiler API when evaluating in compiler scope.
+* Add support for discarding (Clojure's `#_`).
 
 ### Bug Fixes
 

from-clojure.md

@@ -469,6 +469,20 @@ other macros.
 
 Lists and symbols are strictly compile-time concepts in Fennel.
 
+## Discards
+
+Just like Clojure, Fennel supports the `#_` <https://clojure.org/guides/weird_characters#_discard>
+
+```fennel
+[1 #_ {:a :b} 3 #_ #_ (+ 4 5) 6 7 #_]
+```
+
+expands to
+
+```fennel
+[1 3 7]
+```
+
 ## Errors
 
 There are two kinds of ways to represent failure in Lua and