backward-listbackward-list is an interactive compiled Lisp function in `
lisp.el'. It is bound to C-M-p.
(backward-list &optional ARG) Move backward across one balanced group of parentheses. This command will also work on other parentheses-like expressions defined by the current language mode. With ARG, do it that many times. Negative arg -N means move forward across N groups of parentheses. This command assumes point is not in a string or comment.