Clément Pit-Claudel <cpitclaudel@gmail.com> schrieb am Do., 17. Mai 2018 um
16:28 Uhr:

> On 2018-05-17 08:18, Shea Levy wrote:
> > 2. How do we actually ensure the variables are propagated? I wrote the
> >    inherit-local package to do the propagation, but there's no obvious
> >    hook point to call it (thus the advice around generate-new-buffer)
>
> We now have variable watchers:
>
> > add-variable-watcher is a built-in function in ‘C source code’.
> >
> > (add-variable-watcher SYMBOL WATCH-FUNCTION)
> >
> > Cause WATCH-FUNCTION to be called when SYMBOL is set.
> >
> > It will be called with 4 arguments: (SYMBOL NEWVAL OPERATION WHERE).
> > SYMBOL is the variable being changed.
> > NEWVAL is the value it will be changed to.
> > OPERATION is a symbol representing the kind of change, one of: ‘set’,
> > ‘let’, ‘unlet’, ‘makunbound’, and ‘defvaralias’.
> > WHERE is a buffer if the buffer-local value of the variable is being
> > changed, nil otherwise.
> >
> > All writes to aliases of SYMBOL will call WATCH-FUNCTION too.
>
> These could probably be used for that purpose:
>

No, they are only for debugging purposes.