[ZPT] Slots in nested macro definitions

[Brad Clements]

I think this was recently discussed in a topic I brought up.

Does the following thread match this issue?

http://lists.zope.org/pipermail/zpt/2001-December/002507.html

On 17 Dec 2001 at 10:15, dieter.maurer@haufe.de wrote:

Date sent:      	Mon, 17 Dec 2001 10:15:59 +0100
From:           	dieter.maurer@haufe.de
To:             	zpt@zope.org
Subject:        	[ZPT] Slots in nested macro definitions

> I have a macro with the following nested structure:
> 
>  define-macro="OuterMacro"
>    ...
>    define-macro="NestedMacro"
>      ...
>      define-slot="Slot"
>      ...
>    /define-macro
>  /define-macro
> 
> Of course, the reference point for the slot definition is ambiguous:
> is it a slot of "NestedMacro" or of "OuterMacro" or both.
> 
> Earlier ZPT versions treated it as a slot for all enclosing macros.
> I used that quite heavily although I have been aware of the
> ambiguity.
> 
> Newer versions, especially the current CVS version, treats it
> as a splot definition for the immediate enclosing macro
> only. That's bad for me:
> 
>   I need a way to fill the slot by 'use-macro="OuterMacro"'.
> 
> But, I fear, there is currently no way to influence the body
> of "NestedMacro" by users of the outer macro.
> 
>   Hopefully, I am wrong...
> 
> If not, we should think about defining such a way, probably along
> to following lines:
> 
>   Currently, a "define-macro" defines a macro *AND* uses
>   this macro immediately.
> 
>   We should either have a way to
> 
>     *  define the macro only (and not automatically use it)
> 
>     *  provide the same customization for the "define-macro"
>        (with its implicit "use-macro") we have for "use-macro".
>        Especially, allow its slots to be filled by the surrounding
>        context.
> 
> 
> Dieter
> 
> 


Brad Clements,                bkc@murkworks.com   (315)268-1000
http://www.murkworks.com                          (315)268-9812 Fax
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