Re: Length again and definition of macro

Is this a Common Lisp list?

I unfortunately didn't save the subscription info, but since the name is
allegro-cl, I had assumed it as the list for the Allegro Common Lisp
implementation, and not a list for language questions, for which I think
something like comp.lang.lisp would be more appropriate, and have a much
larger audience.

I could easily be wrong of course, and language questions might be
welcomed.

(But then again, you guys charge money for usage of your implementation,
so I guess everyone wants to get their money's worth!)

Larry Troxler





Matthew Danish wrote:
> 
> You are confusing yourself.  I recommend that you cease using ' and use
> only its explicitly expanded form (quote ...) until you understand the
> issues.  Also I recommend that you ensure that you understand what it
> means to have strict evaluation of function arguments.
> 
> As an example:
> 
> (quote '(1 2 3)) is read as (quote (quote (1 2 3)))
> 
> (quote (quote (1 2 3))) evaluates to the list (quote (1 2 3))
> 
> therefore
> 
> (length (quote (quote (1 2 3)))) evaluates to (length v)
>                                         where v = the list (quote (1 2 3))
> 
> Then you apply the function length to its evaluated argument, and
> here the argument is a list of length 2 quite clearly: QUOTE is the
> first element and (1 2 3) is the second element.
> 
> --
> ; Matthew Danish <[email protected]>
> ; OpenPGP public key: C24B6010 on keyring.debian.org
> ; Signed or encrypted mail welcome.
> ; "There is no dark side of the moon really; matter of fact, it's all dark."