Re: Macro vs Function

[Herbert Euler]

> From: David Kastrup <address@hidden>
> To: "Herbert Euler" <address@hidden>
> CC: address@hidden
> Subject: Re: Macro vs Function
> Date: Wed, 12 Apr 2006 11:53:25 +0200
>
> (defmacro xxx (a) a)
> (defun yyy (a) a)
>
> (xxx (+ 3 4)) => 7
> (yyy '(+ 3 4)) => (+ 3 4)

I'm confused now.  Take a look at this:

   (defun f ()
     nil)

   (defmacro m (a)
     (if a
         t
       nil))

   (m (f)) => t

Why does (f) in this example not get evaluated?

Regards,
Guanpeng Xu

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