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Re: Scanning parenthesis in string/comment
From: |
Yuan Fu |
Subject: |
Re: Scanning parenthesis in string/comment |
Date: |
Mon, 23 Jan 2023 11:24:39 -0800 |
> On Jan 22, 2023, at 5:49 PM, Ruijie Yu <ruijie@netyu.xyz> wrote:
>
>
> Yuan Fu <casouri@gmail.com> writes:
>
>> 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.
>>
>> Yuan
>
> Based on what I remember reading from the relevant info pages and
> docstrings, is it possible that you start a new syntax scan that starts
> *at point* and ends *before the ending quotes*? IIUC the function
> `parse-partial-sexp' might be what you should look into next.
Thanks, that seems to be the way to go.
> 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.
Yeah I can find the range of the string and do a parse inside. Thanks!
Yuan