[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
RE: How to rescind a defun?
From: |
Drew Adams |
Subject: |
RE: How to rescind a defun? |
Date: |
Fri, 18 May 2012 15:09:16 -0700 |
> >> If, during an Emacs session, one evaluates a defun that
> >> (inadvertently) redefines an existing function, is it
> >> possible to undo this?
>
> > See function `fmakunbound'.
>
> Thanks, I would have never found this!
>
> Unfortunately, it seems that the original definition is gone. (I
> had hoped that the new definition was just shadowing the original
> one, so that rescinding the former would "resurrect" the latter.)
I see now what you meant by "undo".
No, within a given namespace (obarray) and a given program scope (e.g. `flet' or
`labels' binding), a symbol has only one function definition.
And for a global function definition, assignment is used, not binding. So there
is no shadowing.