How does one undo (even temporarily) an defvaralias, giving two distinct variables?

How does one undo (even temporarily) an defvaralias, giving two distinct variables?

[Alan Mackenzie]

Hello, Emacs!

In the CC Mode testing suite, it is necessary that the two variables
`font-lock-reference-face' and `font-lock-constant-face' be distinct.

These variables were made aliases in Emacs 24.  I need to separated them
out again.

How does one undo defvaralias and friends?

-- 
Alan Mackenzie (Nuremberg, Germany).

Re: How does one undo (even temporarily) an defvaralias, giving two distinct variables?

[Achim Gratz]

Alan Mackenzie writes:
> How does one undo defvaralias and friends?

If nothing else works, makunbound should get rid of those symbols so you
can redefine them.


Regards,
Achim.
-- 
+<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk Blofeld]>+

SD adaptation for Waldorf rackAttack V1.04R1:
http://Synth.Stromeko.net/Downloads.html#WaldorfSDada

Re: How does one undo (even temporarily) an defvaralias, giving two distinct variables?

[Alan Mackenzie]

Hi, Achim.

On Tue, Mar 12, 2013 at 08:09:51PM +0100, Achim Gratz wrote:
> Alan Mackenzie writes:
> > How does one undo defvaralias and friends?

> If nothing else works, makunbound should get rid of those symbols so you
> can redefine them.

makunbound sets the target of the alias unbound, but leaves the alias in
place.

I don't think it's possible to unalias a symbol.

The workaround I've come up with is (defvaralias face (gensym)), which
although it leaves `face' as an alias, at least it points to a different
target.

> Regards,
> Achim.

-- 
Alan Mackenzie (Nuremberg, Germany).

Re: How does one undo (even temporarily) an defvaralias, giving two distinct variables?

[Thierry Volpiatto]

Alan Mackenzie <acm@muc.de> writes:

> I don't think it's possible to unalias a symbol.

Probably you could `unintern' it ?

-- 
Thierry
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gpg --keyserver pgp.mit.edu --recv-keys 59F29997 

Re: How does one undo (even temporarily) an defvaralias, giving two distinct variables?

[Andreas Schwab]

Thierry Volpiatto <thierry.volpiatto@gmail.com> writes:

> Alan Mackenzie <acm@muc.de> writes:
>
>> I don't think it's possible to unalias a symbol.
>
> Probably you could `unintern' it ?

That will break every reference to the symbol.

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
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Re: How does one undo (even temporarily) an defvaralias, giving two distinct variables?

[Stefan Monnier]

> The workaround I've come up with is (defvaralias face (gensym)), which
> although it leaves `face' as an alias, at least it points to a different
> target.

BTW don't count on this workaround too much.  If it works, it's purely
by accident and might get "fixed" at any time.


        Stefan

Re: How does one undo (even temporarily) an defvaralias, giving two distinct variables?

[Alan Mackenzie]

Hi, Stefan,

On Thu, Mar 14, 2013 at 12:36:37PM -0400, Stefan Monnier wrote:
> > The workaround I've come up with is (defvaralias face (gensym)), which
> > although it leaves `face' as an alias, at least it points to a different
> > target.

> BTW don't count on this workaround too much.  If it works, it's purely
> by accident and might get "fixed" at any time.

Sorry, but what might get "fixed"?  What is there about that lisp form
which is, strictly speaking, invalid?

>         Stefan

-- 
Alan Mackenzie (Nuremberg, Germany).