www.delorie.com/gnu/docs/emacs-lisp-intro/emacs-lisp-intro_24.html   search  
Buy the book!

Programming in Emacs Lisp

[ < ] [ > ]   [ << ] [ Up ] [ >> ]         [Top] [Contents] [Index] [ ? ]

1.7.1 Error Message for a Symbol Without a Function

When we evaluated fill-column to find its value as a variable, we did not place parentheses around the word. This is because we did not intend to use it as a function name.

If fill-column were the first or only element of a list, the Lisp interpreter would attempt to find the function definition attached to it. But fill-column has no function definition. Try evaluating this:


In GNU Emacs version 21, you will create a `*Backtrace*' buffer that says:

---------- Buffer: *Backtrace* ----------
Debugger entered--Lisp error: (void-function fill-column)
---------- Buffer: *Backtrace* ----------

(Remember, to quit the debugger and make the debugger window go away, type q in the `*Backtrace*' buffer.)

In GNU Emacs 20 and before, you will produce an error message that says:

Symbol's function definition is void: fill-column

(The message will go away away as soon as you move the cursor or type another key.)

  webmaster   donations   bookstore     delorie software   privacy  
  Copyright 2003   by The Free Software Foundation     Updated Jun 2003