Re: Is there a "selective setq locator/highlighter" anywhere?

[Davis Herring]

> I would like a tool which would highlight these:
>
>     (setq foo bar
>           c-state-cache (cdr c-state-cache))
>     (setcar c-state-cache (caar c-state-cache))
>
> , but not this:
>
>     (setq old-cache c-state-cache)

Not a polished tool, by any means, but can't you just do

;; Handles set, setq, setcar, setcdr
(save-excursion
  (save-restriction
    (widen)
    (goto-char (point-min))
    (while (re-search-forward "(set\\(q?\\|c[ad]r\\)\\>" nil t)
      (skip-syntax-forward "^ >")
      (while
          (progn
            (skip-syntax-forward " >'p")
            (when (looking-at "c-state-cache")
              (let ((o (make-overlay (point) (match-end 0) nil t)))
                (overlay-put o 'face 'highlight)
                (overlay-put o 'c-state-cache t)
                (overlay-put o 'evaporate t)))
            (ignore-errors (forward-sexp 2) t))))))

;; Putting the (meaningless) "c-state-cache" property
;; on the overlay means we can remove them easily:
(remove-overlays nil nil 'c-state-cache t)

Wrap in defuns/commands as desired.

Davis

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