completion-lisp-mode-hook not used for Emacs-Lisp-mode

completion-lisp-mode-hook not used for Emacs-Lisp-mode

[Alan]

File "completion.el" recommends putting "(dynamic-completion-mode)" in .emacs, for using completions.  Doing so has the result that function "completion-lisp-mode-hook" is added to the hook variable "lisp-mode-hook".  But for Emacs lisp code the mode is "Emacs-Lisp-mode", which has hook variable "emacs-lisp-mode-hook", so function "completion-lisp-mode-hook" isn't run when one edits Emacs lisp.  There seems to be a disconnect here.

I am using

GNU Emacs 24.2.1 (i386-mingw-nt5.1.2600) of 2012-08-28 on MARVIN

Re: completion-lisp-mode-hook not used for Emacs-Lisp-mode

[Michael Heerdegen]

Hi Alan,

> File "completion.el" recommends putting "(dynamic-completion-mode)" in
> .emacs, for using completions.  Doing so has the result that function
> "completion-lisp-mode-hook" is added to the hook variable
> "lisp-mode-hook".  But for Emacs lisp code the mode is
> "Emacs-Lisp-mode", which has hook variable "emacs-lisp-mode-hook", so
> function "completion-lisp-mode-hook" isn't run when one edits Emacs
> lisp.  There seems to be a disconnect here.
>
> I am using
>
> GNU Emacs 24.2.1 (i386-mingw-nt5.1.2600) of 2012-08-28 on MARVIN

Sounds like a bug.  Please make a bug report with M-x report-emacs-bug
when what is described in the file doesn't work for you.


Michael.

Re: completion-lisp-mode-hook not used for Emacs-Lisp-mode

[Alan]

On Sunday, June 23, 2013 1:37:18 PM UTC-5, Michael Heerdegen wrote:
> Hi Alan,
> 
> 
> 
> > File "completion.el" recommends putting "(dynamic-completion-mode)" in
> 
> > .emacs, for using completions.  Doing so has the result that function
> 
> > "completion-lisp-mode-hook" is added to the hook variable
> 
> > "lisp-mode-hook".  But for Emacs lisp code the mode is
> 
> > "Emacs-Lisp-mode", which has hook variable "emacs-lisp-mode-hook", so
> 
> > function "completion-lisp-mode-hook" isn't run when one edits Emacs
> 
> > lisp.  There seems to be a disconnect here.
> 
> >
> 
> > I am using
> 
> >
> 
> > GNU Emacs 24.2.1 (i386-mingw-nt5.1.2600) of 2012-08-28 on MARVIN
> 
> 
> 
> Sounds like a bug.  Please make a bug report with M-x report-emacs-bug
> 
> when what is described in the file doesn't work for you.
> 
> 
> 
> 
> 
> Michael.

I made the post and later deleted it.  I wasn't having a specific problem due to what I observed.  I was trying to get rid of completions that had the character "\" at the end of them.  These came from editing Emacs Lisp and using constructs like "(insert (format "The value of \"variable\" is %s" variable))".  After using such a construct, the completion entry would be variable\.  To correct this I changed the syntax of "\" from "_" to "w", in the table 'completion-standard-syntax-table and I changed the key table entry for "\" to be 'completion-separator-self-insert-command" (using a lambda function in 'emacs-lisp-mode-hook).

At first I thought I would need to change the syntax of "\" in "completion-lisp-syntax-table", but then I realized that wasn't the case (due to my observation that 'completion-lisp-mode-hook isn't run when one edits Emacs Lisp).  As for the changes that would be made if 'completion-lisp-mode-hook were used, I'll be on the lookout for when those changes might be desired.

One curiosity that I didn't explore further was that if I used the syntax "\" for "\", then the completion was not added at all (i.e. use of the 'complete function would not list it when its prefix was entered).

My reasoning for deleting my post was that it occurred to me that the authors of completion.el might really have made a deliberate distinction between Emacs Lisp and other Lisps.