macros and eval-when

From: Andreas Eder (Andreas.Eder_at_gmx.net)
Date: 11/24/04 

Date: Wed, 24 Nov 2004 16:33:40 +0100

Hi,

I have a question concerning the use macros and eval-when situations.

Suppose I have a file in which a define some macros and want to use
them in the same file afterwards.
Then, I have to wrap the definition of the macros with
(eval-when (:compile-toplevel) (defmacro ... ))
Is that right?

But in a lot of code that I've seen, the defmacros are wrapped with
 (eval-when (:compile-toplevel :load-toplevel :execute) ... )

Is there any reason to use :load-toplevel and :execute here ?

Macroexpansion happens before loading and executing, doesn't it?
Where is the fault in my reasoning?

Thanks

Andreas 

-- 
Wherever I lay my .emacs, there's my $HOME.

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