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From: davis@pacific.mps.ohio-state.edu ("John E. Davis")
Newsgroups: gnu.emacs,comp.emacs
Subject: tricky elisp question??
Message-ID: <DAVIS.90Sep8204329@pacific.mps.ohio-state.edu>
Date: 9 Sep 90 00:43:29 GMT
Sender: news@pacific.mps.ohio-state.edu
Reply-To: davis@pacific.mps.ohio-state.edu  (John E. Davis)
Followup-To: gnu.emacs
Organization: "Dept. of Physics, The Ohio State University"
Lines: 30

Hi,

    Although I have been able to do simple things in emacs lisp I am now stuck
with the following problem.  I have a key bound to a function with the name,
say, 'some_function'.  Now I have another similar function called
'some-function'.  What I want is a function called 'toggle-key' so that when I
do 'M-x toggle-key' then enter the key, the key-definition toggles back and
forth between the functions 'some-function' and 'some_function'.

Note that I have about twenty functions of the form xxx-yyy-zzz  and the same
number of the form xxx_yyy_zzz.  So the function 'toggle-key' will have to be
very generic. ie,

      1.  find current function binding for key.
      2.  if the name of the function has -'s then rebind the key to the
          function with the same name but _'s changed to -'s and
          visa-versa. Note that -'s and _'s are never mixed.  That is I do not
	  have functions named xxx_yyy-zz.  Also there are a varying number of
	  -'s and _'s in the names as well as the length of the name (ie. x-y
	  and xx-y-z).
      3.  rebind the key to the new function.

Can this be done?
Thanks again,
      
--
John

  bitnet: davis@ohstpy
internet: davis@pacific.mps.ohio-state.edu