Re: Error with add-function and process-filter

[hendeigr]

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On Monday, 11 March 2024 at 18:01, tpeplt <tpeplt@gmail.com> wrote:

> > > (add-function :before (process-filter h-proc) #'h/trace)
> > > [...]
> > > However, am getting this error:
> > > Symbol’s value as variable is void: v
> > 
> > My crystal ball tells me you forgot to activate `lexical-binding`
> > because you didn't see the message that must have been emitted at some
> > point:
> > 
> > Warning: Use of gv-ref probably requires lexical-binding
> > 
> > If you're using a new enough Emacs you can click on the orange "/d" in
> > your mode line to fix the problem.
> 
> 
> If you are not using a new enough version of Emacs, then add the
> following line to the beginning (the very first line) of your Emacs Lisp
> file:
> 
> ;; -- lexical-binding: t; --
> 
> That is what clicking on the "/d" will do for you.
> 
> --

That's got it! Thank you both for your prompt responses. Now its time for me to 
learn more about dynamic binding vs lexical binding!

Thanks again,

James