c-subword-mode

c-subword-mode

[Nick Roberts]

With CC Mode 5.31.3 and GNU Emacs 22.0.50.71 (i686-pc-linux-gnu, X toolkit,
Xaw3d scroll bars) of 2006-02-25:

Sometimes I get error messages saying that c-subword-mode is a void variable.
c-subword-mode seems to be a function, so the patch below might be a fix.

-- 
Nick                                           http://www.inet.net.nz/~nickrob


*** cc-cmds.el	25 Feb 2006 17:51:43 +1300	1.44
--- cc-cmds.el	27 Feb 2006 11:43:36 +1300	
*************** With universal argument, inserts the ana
*** 259,265 ****
  		     (if c-hungry-delete-key "h" "")
  		     (if (and
  			  ;; cc-subword might not be loaded.
! 			  (boundp 'c-subword-mode)
  			  (symbol-value 'c-subword-mode))
  			 "w"
  		       "")))
--- 259,265 ----
  		     (if c-hungry-delete-key "h" "")
  		     (if (and
  			  ;; cc-subword might not be loaded.
! 			  (fboundp 'c-subword-mode)
  			  (symbol-value 'c-subword-mode))
  			 "w"
  		       "")))


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Re: c-subword-mode

[Richard Stallman]

    Sometimes I get error messages saying that c-subword-mode is a void variable.
    c-subword-mode seems to be a function, so the patch below might be a fix.

That patch seems wrong to me.  If c-subword-mode is defined as a function 
and not as a variable, your patch will CAUSE such an error rather than
prevent it.

Can you provide a Lisp-level backtrace from some occasion where you
get that error?


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Re: c-subword-mode

[Alan Mackenzie]

Hi, Nick!

On Mon, 27 Feb 2006, Nick Roberts wrote:


>With CC Mode 5.31.3 and GNU Emacs 22.0.50.71 (i686-pc-linux-gnu, X toolkit,
>Xaw3d scroll bars) of 2006-02-25:

>Sometimes I get error messages saying that c-subword-mode is a void variable.
>c-subword-mode seems to be a function, so the patch below might be a fix.

c-subword-mode is normally defined as (define-minor-mode c-subword-mode
....), so it is has both function and variable bindings.  [On older
Emacsen (< 21.1) lacking define-minor-mode, a stub function is defined instead.]

Can you give any more details about how you get a "void variable" error.
It surely cannot be at cc-cmds.el L263.  I don't think the patch is
right.

>-- 
>Nick                                           http://www.inet.net.nz/~nickrob


>*** cc-cmds.el	25 Feb 2006 17:51:43 +1300	1.44
>--- cc-cmds.el	27 Feb 2006 11:43:36 +1300	
>*************** With universal argument, inserts the ana
>*** 259,265 ****
>  		     (if c-hungry-delete-key "h" "")
>  		     (if (and
>  			  ;; cc-subword might not be loaded.
>! 			  (boundp 'c-subword-mode)
>  			  (symbol-value 'c-subword-mode))
>  			 "w"
>  		       "")))
>--- 259,265 ----
>  		     (if c-hungry-delete-key "h" "")
>  		     (if (and
>  			  ;; cc-subword might not be loaded.
>! 			  (fboundp 'c-subword-mode)
>  			  (symbol-value 'c-subword-mode))
>  			 "w"
>  		       "")))

-- 
Alan Mackenzie (Munich, Germany)




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Re: c-subword-mode

[Nick Roberts]

 >     Sometimes I get error messages saying that c-subword-mode is a void
 >     variable.  c-subword-mode seems to be a function, so the patch below
 >     might be a fix.
 > 
 > That patch seems wrong to me.  If c-subword-mode is defined as a function 
 > and not as a variable, your patch will CAUSE such an error rather than
 > prevent it.

Yes it probably is wrong, but I don't see the point of the test if
c-subword-mode is a function.

 > Can you provide a Lisp-level backtrace from some occasion where you
 > get that error?

If I load a C file, I get:

Debugger entered--Lisp error: (void-variable c-subword-mode)
  c-update-modeline()
  c-basic-common-init(c-mode ((java-mode . "java") (awk-mode . "awk") (other . "gnu")))
  c-common-init(c-mode)
  c-mode()
  set-auto-mode-0(c-mode nil)
  set-auto-mode()
  normal-mode(t)
  after-find-file(nil t)
  find-file-noselect-1(#<buffer myprog.c> "~/myprog.c" nil nil "~/myprog.c" (458851 773))
  find-file-noselect("~/myprog.c" nil nil t)
  find-file("~/myprog.c" t)
  call-interactively(find-file)

It's probably due to my build.  If I load cc-mode first, I don't get the error.


-- 
Nick                                           http://www.inet.net.nz/~nickrob


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Re: c-subword-mode

[Nick Roberts]

 > c-subword-mode is normally defined as (define-minor-mode c-subword-mode
 > ....), so it is has both function and variable bindings.  [On older
 > Emacsen (< 21.1) lacking define-minor-mode, a stub function is defined instead.]

Yes, I misread the code. c-subword-mode just appeared as a function because
it wasn't loaded.

 > Can you give any more details about how you get a "void variable" error.
 > It surely cannot be at cc-cmds.el L263.  I don't think the patch is
 > right.

The patch is surely wrong.  I don't think I've built Emacs correctly.
Sorry for the noise.


-- 
Nick                                           http://www.inet.net.nz/~nickrob


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Re: c-subword-mode

[Richard Stallman]

    It's probably due to my build.

What does that mean?

				    If I load cc-mode first, I don't get the error.

It's normal for people to visit C files without loading cc-mode first,
so that case does need to work.  Why do you think it is your fault?


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