(defun eval-sexp-add-defvars (exp &optional pos)
"Prepend EXP with all the `defvar's that precede it in the buffer.
POS specifies the starting position where EXP was found and defaults to point."
+ (setq exp (macroexpand-all exp)) ;Eager macro-expansion.
(if (not lexical-binding)
exp
(save-excursion