Symbols as words?

Symbols as words?

[Raffaele Ricciardi]

Hello,

what's the option to make Emacs consider symbols as words?  In Viper mode, I
used to have:

(setq viper-syntax-preference 'extended)

"`extended' means Viper word constituents are symbols that are marked as 
being
parts of words OR symbols in Emacs syntax tables.  This is most 
appropriate for
major modes intended for editing programs."

I've looked around (Emacs Manual, Emacswiki, web forums) and I've found 
nothing
besides hacking the syntax tables entry by entry.

Thanks.

Re: Symbols as words?

[Jude DaShiell]

abbrev-mode might work in this case once a dictionary of abbreviations 
is built or downloaded if available.
On Sun, 26 Aug 2012, Raffaele 
Ricciardi wrote:

> Hello,
> 
> what's the option to make Emacs consider symbols as words?  In Viper mode, I
> used to have:
> 
> (setq viper-syntax-preference 'extended)
> 
> "`extended' means Viper word constituents are symbols that are marked as being
> parts of words OR symbols in Emacs syntax tables.  This is most appropriate
> for
> major modes intended for editing programs."
> 
> I've looked around (Emacs Manual, Emacswiki, web forums) and I've found
> nothing
> besides hacking the syntax tables entry by entry.
> 
> Thanks.
> 
> 

jude <jdashiel@shellworld.net>

Re: Symbols as words?

[Raffaele Ricciardi]

On 26/08/12 15:35, Jude DaShiell wrote:
 > abbrev-mode might work in this case once a dictionary of abbreviations
 > is built or downloaded if available.

Thank you for your help, but that is not what I'm looking for.  I'm looking
for a way to make commands that work on words - e.g. `forward-word',
`backward-word', `kill-word', etc. - work on symbols instead.

Re: Symbols as words?

[Jambunathan K]

Raffaele Ricciardi <rfflrccrd@gmail.com> writes:

> On 26/08/12 15:35, Jude DaShiell wrote:
>> abbrev-mode might work in this case once a dictionary of abbreviations
>> is built or downloaded if available.
>
> Thank you for your help, but that is not what I'm looking for.  I'm looking
> for a way to make commands that work on words - e.g. `forward-word',
> `backward-word', `kill-word', etc. - work on symbols instead.


    (add-hook 'c-mode-hook
              (lambda ()
                (modify-syntax-entry ?_ "w")))

,---- From (info "(elisp) Syntax Class Table")
| Symbol constituents: `_'
|      Extra characters used in variable and command names along with word
|      constituents.  Examples include the characters `$&*+-_<>' in Lisp
|      mode, which may be part of a symbol name even though they are not
|      part of English words.  In standard C, the only
|      non-word-constituent character that is valid in symbols is
|      underscore (`_').
`----

>
>

-- 

Re: Symbols as words?

[Pascal J. Bourguignon]

Raffaele Ricciardi <rfflrccrd@gmail.com> writes:

> Hello,
>
> what's the option to make Emacs consider symbols as words?  In Viper mode, I
> used to have:
>
> (setq viper-syntax-preference 'extended)
>
> "`extended' means Viper word constituents are symbols that are marked
> as being
> parts of words OR symbols in Emacs syntax tables.  This is most
> appropriate for
> major modes intended for editing programs."
>
> I've looked around (Emacs Manual, Emacswiki, web forums) and I've
> found nothing
> besides hacking the syntax tables entry by entry.

If you use forward-sexp C-M-f it skips over symbols instead of words M-f.

-- 
__Pascal Bourguignon__                     http://www.informatimago.com/
A bad day in () is better than a good day in {}.

Re: Symbols as words?

[Raffaele Ricciardi]

On 26/08/12 19:12, Pascal J. Bourguignon wrote:
 > If you use forward-sexp C-M-f it skips over symbols instead of words M-f.

This helps, thanks.  Still, it feels weird that Emacs is oblivious to 
symbols even
in Emacs Lisp code, not to mention that C-M- chords aren't super 
comfortable.
So, since there is no option to customize this behaviour, I've written a 
snippet
of code to do so for any programming mode.  I would have preferred my 
code to
scan the syntax table and convert symbol constituents to word constituents,
but I have not been able to figure out quickly the format of syntax tables,
therefore I've resorted to manually listing non-word graphic characters.

(defun rr-symbol-constituent-p (^char)
   "Return non non nil if ^CHAR is a symbol constituent in the current 
buffer's
syntax table."
   (= (char-syntax ^char) ?_))

(defvar rr-graphic-non-word-char-list
   (string-to-list "!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~")
   "List of characters besides letters and numbers that could be symbol
constituents according to syntax tables.")

(defun rr-symbols-to-words ()
   "Make symbols act as words in the current buffer's syntax table."
   (mapcar (lambda (^char)
             (when (rr-symbol-constituent-p ^char)
               (modify-syntax-entry ^char "w")))
           rr-graphic-non-word-char-list))

Cheers.

Re: Symbols as words?

[Pascal J. Bourguignon]

Raffaele Ricciardi <rfflrccrd@gmail.com> writes:

> On 26/08/12 19:12, Pascal J. Bourguignon wrote:
>> If you use forward-sexp C-M-f it skips over symbols instead of words M-f.
>
> This helps, thanks.  Still, it feels weird that Emacs is oblivious to
> symbols even in Emacs Lisp code, not to mention that C-M- chords
> aren't super comfortable.

You can just trivially bind forward-sexp and backward-sexp to your own
confortable keys.

(global-set-key (kbd "<f5>") 'forward-sexp)
(global-set-key (kbd "<f6>") 'backward-sexp)


-- 
__Pascal Bourguignon__                     http://www.informatimago.com/
A bad day in () is better than a good day in {}.