Re: Declaring a local dynamic variable?

[Andreas Röhler]

Am 28.09.2013 08:24, schrieb W. Greenhouse:
> Andreas Röhler <andreas.roehler@easy-emacs.de> writes:
>
> > Am 27.09.2013 22:18, schrieb Pascal J. Bourguignon:
> > [ ... ]
> > > The conclusion is that in emacs lisp you have to prefix ALL the symbols!
> > > Which clearly demonstrates a failure of the language.
> >
> > Resp. of it's implementation.
> >
> > Why not uniquify --instead of prefixing-- under the hood?
>
> As has already been pointed out in this thread, Emacs does have (via
> cl-lib or more specifically cl-macs) a version of `declare' whose
> special-variable declarations are respected by the byte compiler.  So
> it's a solved problem; I don't understand why Pascal and others are
> NIHing it and then complaining about the deficiencies of Emacs Lisp.
>
> The general usefulness of this functionality, however, does make me
> wonder why it's still stuck in the cl namespace.  It seems like a prime
> candidate for promotion to subr or similar.

BTW not sure if we are speaking at the same thing, resp. if this might be expressed by 
"lexical" or "dynamic" already.

IMO it's convenient to use and change a let-bound var in downward functions, 
whithout the need to hand it over via arguments etc.
Just a convenience, it saves keystrokes, a major reason for me to use Emacs.

Maybe "let" should already provide what "declare" does?