[ZPT] Some Macros Questions/Suggestions

[Chris Withers]

Evan Simpson wrote:
> 
> Chris Withers wrote:
> >>Simplicity of implementation, and nobody has really worked out in detail
> >>how all the metal statements should really interact on the same tag.
> >
> > Where and how would be good to kick off a discussion about this?
> 
> Here would be fine.

And how should we kick it off? ;-)

> > [macro]
> > <a href="foo" metal:define-attribute="href one">Foo!</a>
> >
> > [Use Macro]
> > <a href="bar" metal:fill-attribute="one string:notbar">Bar!</a>
> 
> This can be readily accomplished with:
> 
> [macro]
> <a href="foo" tal:attributes="href one | default">Foo!</a>
> 
> [Use Macro]
> <... tal:define="one string:notbar">
>    ...
>    <... metal:use-macro ...>
>    ...
> 
> As Dieter has pointed out, this implicit parameterization of macros,
> while fully consistent, is rather messy and implicit.  

Yeah, I tend to agree, especially given the new religion that implicit is bad, which I
wholeheartedly agree with.

> I'm not sure how
> it could helpfully be made more explicit, though.

Well, I ddi give a pretty explicit spelling which seemed quite graceful to me, what could
be improved with it?

cheers,

Chris