Re: Using gv in map and seq?

[Stefan Monnier <monnier@iro.umontreal.ca>]

>>> Something like the patch below seems to work (and it generalizes
>>> map-put to accept for MAP not only symbols but any "lvalue").  It also
>>> tightens the code generated by map--dispatch.
> But you have completely removed `map-put' here, right?  Is it supposed to
> be implemented in terms of `map-elt' now that it is "set-able"?

Indeed, it becomes redundant: you can use (setf (map-elt M K) V) à la place.

> > Something like the patch below seems to work (and it generalizes
> > map-put to accept for MAP not only symbols but any "lvalue").
> For lists, yes indeed. I was looking for a simple way to do that,
> thanks!

Since the macro-expansion is done before we know what type we'll get,
the restriction to lvalues carries over to all other types :-(

> Je bloque sur ton code, quand j'évalue
>
>     (setq my-map '())
>     (setf (map-elt my-map 'b) 4)
>
> J'ai une erreur `Debugger entered--Lisp error: (void-variable map)'

Il y a en tout cas l'erreur ci-dessous qu'il faut corriger:

> > +        `(map--dispatch map
                             ^^^
                             ,map

-- Stefan