Subject: Re: bug#25841: 25.2; Highlighting not being updated in some modes.

From: Paul Whittaker <[email-masked]>
Date: Thu, 23 Feb 2017 12:21:38 +0000

On 22/02/17 22:02, Glenn Morris wrote:
> This is the documented way highlight-regexp behaves:
>
>     Use Font lock mode, if enabled, to highlight REGEXP.  Otherwise,
>     use overlays for highlighting.  If overlays are used, the
>     highlighting will not update as you type.

Thanks, I'd missed that.

I'm trying to get dynamic (non-overlay) highlighting working in a plain
text mode.  That documentation makes me think that I just need to enable
font-lock mode, but doing that doesn't appear to make any difference.

  emacs -Q
  M-x fundamental-mode RET
  M-1 M-x font-lock-mode RET
  M-x highlight-regexp RET foo RET hi-yellow RET

  f o o SPC b a r  ;; Not highlighted, as before.

Would you expect that to work, or is there something else that I'm
missing here?  Apologies if this is a stupid question: I suspect I'm not
seeing all of the picture.

Thanks in advance,

Paul.

-- 
Paul Whittaker
DRisQ Ltd. Company number 7754903, registered in England and Wales.
Registered office: Malvern Hills Science Park, Malvern, UK, WR14 3SZ.
Tel: +44(0)1684 252452  Web: www.drisq.com

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