Re: emacs-27 breaks null function

[Joost Kremers]

On Mon, Apr 06 2020, Nelson H. F. Beebe wrote:
> Andreas Schwab <address@hidden> writes in response:
>
> > > That variable (executing-macro) as been marked obsolete for 
> > > more than 24 years.
> > > The alias has finally been removed in emacs 27.  Use 
> > > executing-kbd-macro
> > > instead.
>
> Thanks, that solves the problem for the particular use of 
> executing-macro,
> but what about testing for an undefined variable in general, 
> such as
>
> 	(null 
> this-var-might-not-be-defined-but-might-also-be-defined)

That's what `boundp` is for. (And `fboundp` if you want to check 
whether a symbol has a function binding).

--
Joost Kremers
Life has its moments