forward/backward-sentence in programming modes

forward/backward-sentence in programming modes

[Marcin Borkowski]

Hi there,

does M-a/M-e do anything useful in programming-language modes?  I did a
quick check in elisp mode, and it seems that they are more or less
useless there.  (Apparently, they just stop at a string of more than one
newline.)  I'm wondering whether this is a good behavior.  Maybe they
should be equivalent to forward/backward-sexp?  But what about, say,
Python or C mode or other ones?  Any ideas?

Regards,

-- 
Marcin Borkowski
http://octd.wmi.amu.edu.pl/en/Marcin_Borkowski
Faculty of Mathematics and Computer Science
Adam Mickiewicz University

Re: forward/backward-sentence in programming modes

[Raffaele Ricciardi]

On 05/12/14 23:44, Marcin Borkowski wrote:
> Hi there,
>
> does M-a/M-e do anything useful in programming-language modes?

More or less, they  work as expected in strings and comments.  Maybe 
they could be improved by tweaking some settings, but I have never 
looked into it.

Re: forward/backward-sentence in programming modes

[Raffaele Ricciardi]

On 05/12/14 23:44, Marcin Borkowski wrote:
> But what about, say,
> Python or C mode or other ones?

In Python Mode (from "python.el"):
  - M-a runs the command python-nav-backward-block
  - M-e runs the command python-nav-forward-block
  - M-k runs the command kill-sentence

For consistency, M-k could kill to the end of block, instead.  Here is 
an idea:

--

(defun point-after/rr ($movement-command &rest $args)
   "Return what the value of point would be after executing 
$MOVEMENT-COMMAND
with $ARGS."
   (save-excursion
     (apply $movement-command $args)
     (point)))


(defun python-kill-block/rr (&optional $arg)
   "Kill from point to end of Python block.  It doesn't fix indentation.

With $ARG, repeat.  With negative argument, kill $ARG times
backward to previous Python block."
   (interactive "p")
   (or $arg (setq $arg 1))
   (kill-region (point)
                (point-after/rr #'python-nav-forward-block $arg)))


(define-key python-mode-map (kbd "M-k") #'python-kill-block/rr)

--

 > Any ideas?

Context-sensitive versions of M-a and M-e could deal with sentences when 
in comments or strings, and do something else in code (like Python Mode 
does).