+(defun lisp->js (sexp)
+ (cond
+ ((integerp sexp) (format nil "~a" sexp))
+ ((stringp sexp) (format nil "\"~a\"" sexp))
+ ((listp sexp) (concat "[" (join (mapcar 'lisp->js sexp) ",") "]"))))
+
+(define-compilation quote (sexp)
+ (lisp->js sexp))
+
+(define-compilation debug (form)
+ (format nil "console.log(~a)" (ls-compile form env)))
+
+(define-compilation while (pred &rest body)
+ (format nil "(function(){while(~a){~a}})() "
+ (ls-compile pred env)
+ (ls-compile-sexps body env)))
+
+(defmacro eval-when-compile (&body body)
+ `(eval-when (:compile-toplevel :execute)
+ ,@body))
+
+(define-compilation eval-when-compile (when &rest body)
+ (eval body))
+
+;;; aritmetic primitives
+(define-compilation + (x y)
+ (concat "((" (ls-compile x env) ") + (" (ls-compile y env) "))"))
+
+(define-compilation - (x y)
+ (concat "((" (ls-compile x env) ") - (" (ls-compile y env) "))"))
+
+(define-compilation * (x y)
+ (concat "((" (ls-compile x env) ") * (" (ls-compile y env) "))"))
+
+(define-compilation / (x y)
+ (concat "((" (ls-compile x env) ") / (" (ls-compile y env) "))"))
+
+(define-compilation = (x y)
+ (concat "((" (ls-compile x env) ") == (" (ls-compile y env) "))"))
+
+