bug#5689: looking-back-p

["Andreas Röhler" <andreas.roehler@easy-emacs.de>]

Devon Sean McCullough wrote:
> Please include the missing looking-back-p
> either as a subst like looking-at-p and string-match-p
> 
> --- lisp/subr.el.~1.667.~	2009-11-24 22:59:23.000000000 -0500
> +++ lisp/subr.el	2010-03-06 12:52:30.000000000 -0500
> @@ -2984,6 +2984,12 @@
>    (let ((inhibit-changing-match-data t))
>      (looking-at regexp)))
>  
> +(defsubst looking-back-p (regexp &optional limit greedy)
> +  "\
> +Same as `looking-back' except this saves the match data."
> +  (save-match-data
> +    (looking-back regexp limit greedy)))
> +
>  (defsubst string-match-p (regexp string &optional start)
>    "\
>  Same as `string-match' except this function does not change the match data."
> 
> or as a macro like
> 
> --- lisp/subr.el.~1.667.~	2009-11-24 22:59:23.000000000 -0500
> +++ lisp/subr.el	2010-03-06 13:18:53.000000000 -0500
> @@ -2984,6 +2984,14 @@
>    (let ((inhibit-changing-match-data t))
>      (looking-at regexp)))
>  
> +(defmacro looking-back-p (&rest args)
> +  "\
> +Same as `looking-back' except this saves the match data.
> +
> +\(fn REGEXP &optional LIMIT GREEDY)"
> +  `(save-match-data
> +     (looking-back .,args)))
> +
>  (defsubst string-match-p (regexp string &optional start)
>    "\
>  Same as `string-match' except this function does not change the match data."
> 
> 
> 
> 


Hi Devon,

thanks a lot.

As a change usually has pros and cons, just my personal
view:

`save-match-data' changes the way of execution, I'd
like to see it expressingly.

Think code is pretty good readable as it's now.

Andreas