Re: Scanning parenthesis in string/comment

[Jean Louis <bugs@gnu.support>]

* Yuan Fu <casouri@gmail.com> [2023-01-22 20:17]:
> I’m writing an expand-region-like function, which expands region by logical entities, like word-at-point, list-at-point, etc. Say I have this string
> 
> "Filter out invalid regions in REGIONS regarding ORIG.
> ORIG is the current position. Each region is (BEG . END).”
> 
> And point is at the opening parenthesis, how do I detect this
> balanced parenthesis pair and expand the region over it? syntax-pass
> and forward-list only works with lists outside of strings and
> comments, IIUC.

What I understand is that you use thing-at-point similar functions, so
why not then define your own think at point in the sense as here below:

;;; Thing at point 'thing-within-quotes

(defun rcd-tap-thing-within-quotes-start ()
    "Move point to the beginning of thing within quotes."
  (re-search-backward (rx (or "\"" "'")))
  (forward-char 1))

(defun rcd-tap-thing-within-quotes-end ()
    "Move point to the end of thing within quotes."
  (re-search-forward (rx (or "\"" "'")))
  (backward-char 1))

(put 'thing-within-quotes 'beginning-op 'rcd-tap-thing-within-quotes-start)
(put 'thing-within-quotes 'end-op 'rcd-tap-thing-within-quotes-end)

Then the above will give you whatever is inside of quotes you define
when you apply function:

(thing-at-point 'thing-within-quotes)

on it, and it will not work well outside of quotes.

-- 
Jean

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