js-on-sx: typeof <ident> returns "undefined" for unresolvable references

2026-05-09 08:04:21 +00:00
parent 5632830118
commit 21d0be58ec
2 changed files with 16 additions and 0 deletions
--- a/lib/js/transpile.sx
+++ b/lib/js/transpile.sx
@@ -225,6 +225,20 @@
              (js-transpile (nth arg 1))
              (js-transpile (nth arg 2))))
          (else true)))
+      ((and (= op "typeof") (js-tag? arg "js-ident"))
+        (let
+          ((name (nth arg 1)))
+          (list
+            (js-sym "if")
+            (list
+              (js-sym "or")
+              (list
+                (js-sym "env-has?")
+                (list (js-sym "current-env"))
+                name)
+              (list (js-sym "dict-has?") (js-sym "js-global") name))
+            (list (js-sym "js-typeof") (js-transpile arg))
+            "undefined")))
      (else
        (let
          ((a (js-transpile arg)))