Re: Searching for line beginning

[Eli Zaretskii]

> From: "Basil L. Contovounesios" <contovob@tcd.ie>
> Cc: emacs-devel@gnu.org
> Date: Sun, 14 Aug 2022 18:33:00 +0300
> 
> Eli Zaretskii [2022-08-13 18:43 +0300] wrote:
> 
> > C-a (move-beginning-of-line) does this to find the line's beginning:
> >
> >     ;; Move to beginning-of-line, ignoring fields and invisible text.
> >     (skip-chars-backward "^\n")
> >     (while (and (not (bobp)) (invisible-p (1- (point))))
> >       (goto-char (previous-char-property-change (point)))
> >       (skip-chars-backward "^\n"))
> >
> > Apart of the fields part (which can be handled by binding
> > inhibit-field-text-motion), can anyone see a reason why not use
> > line-beginning-position instead?  The latter is much faster,
> > especially when lines are very long.
> 
> FWIW, one could also say (beginning-of-line) or (beginning-of-line 1)
> instead of (goto-char (line-beginning-position)).

As a matter of principle, I don't like calling commands from Lisp if I
can avoid that, because commands frequently have extensive checks of
the arguments that are redundant in non-interactive calls.