Re: Declaring a local dynamic variable?

["Andreas Röhler" <andreas.roehler@easy-emacs.de>]

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?