bug#35062: [PATCH v3 2/3] constify a bit of xterm.c

[Eli Zaretskii <eliz@gnu.org>]

> Date: Sat, 20 Apr 2019 13:31:44 +0300
> From: Konstantin Kharlamov <hi-angel@yandex.ru>
> Cc: eggert@cs.ucla.edu, 35062@debbugs.gnu.org
> 
> On Сб, Apr 20, 2019 at 09:53, Eli Zaretskii <eliz@gnu.org> wrote:
> >>  Date: Sat, 20 Apr 2019 04:09:19 +0300
> >>  From: Konstantin Kharlamov <hi-angel@yandex.ru>
> >>  Cc: Eli Zaretskii <eliz@gnu.org>, 35062@debbugs.gnu.org
> >> 
> > I don't think I follow: Emacs's search commands do highlight the
> > matches, and we also have symbol-search commands ("M-s _" etc.), so
> > what exactly is missing?
> 
> See: to any search a word in Emacs you have to either type it manually 
> or copy-paste it. And then if you get unlucky to have next match 
> offscreen, the search gonna carry currently visible portion of text 
> away.
> 
> In other editors and IDEs it's implemented instead by selecting a word, 
> which makes the editor to highlight matches.

"M-s ." will highlight matches for the symbol at point, without even
requiring you to select that symbol.

> That's similar to what highlight-symbol.el is doing: you put a caret
> over a text, and after a short timeout (IIRC you can't set timeout
> to 0 as it introduces lags to Emacs) it highlights visible matches
> of the symbol under the caret. And then, if you want to, you can
> press a hotkey to lock the highlight.

So you want to avoid typing "M-s .", is that right?  But selecting a
symbol will need more keystrokes (except for very short symbols), so
where's the gain in that?