But frame-parameters have to be manually managed with frame-parameter, no?
Even ignoring compatibility for user-facing configuration, it seems really
annoying to have to call frame-parameter and set-frame-parameter all the
time, especially if you're trying to simulate `let'.

Are there at least any plans for a nicer API for working with what used to
be frame-local variables?

On Mon, May 17, 2010 at 12:48 PM, Stefan Monnier
<monnier@iro.umontreal.ca>wrote:

> > This all raises the issue, though: what's the accepted replacement for
> > frame-local variables,
>
> frame-parameters
>
> > and why are they deprecated in the first place?
>
> Because OT1H they're very little used, and OTOH they're a pain in the
> rear to support and maintain because of all kinds of corner cases, and
> it'll only get better with the addition of concurrency and/or
> lexical scoping.
>
> > My package has rather a few of them, and it's very useful to be able
> > to use them like variables.  I want to make them available for user
> > customization, let-bind them, and use them without having to go
> > through lots of manual frame-parameter rigamarole each time.  I would
> > rather not break any user customizations using these variables.
> > So what should I do?
>
> Use frame-parameters.  Note that until Emacs-24 is released, that gives
> you a fair bit of time to deal with it.
>
>
>        Stefan
>