+(define-builtin map-for-in (function object)
+ (js!selfcall
+ "var f = " function ";" *newline*
+ "var g = (typeof f === 'function' ? f : f.fvalue);" *newline*
+ "var o = " object ";" *newline*
+ "for (var key in o){" *newline*
+ (indent "g(" (if *multiple-value-p* "values" "pv") ", 1, o[key]);" *newline*)
+ "}"
+ " return " (ls-compile nil) ";" *newline*))
+