[ZPT] tal:define and metal:use-macro

[Troy Farrell]

I've been making mistakes all week, so take my words with a dose of salt :)

According to the help file:

 > The effect of expanding a macro is to graft a subtree from another
 > document (or from elsewhere in the current document) in place of the
 > statement element, replacing the existing sub-tree. Parts of the
 > original subtree may remain, grafted onto the new subtree, if the
 > macro has slots. See metal:define-slot for more information. If the
 > macro body uses any macros, they are expanded first.

Try something like this:

<div tal:define="var python:'def outer'">

   <div metal:define-macro="m">
     <div metal:define-slot="n">
       var: <span tal:replace="var" />
     </div>
   </div>
</div>


<div tal:define="var python:'use outer'">

   <div metal:use-macro="template/macros/m">
     <div metal:fill-slot="n"
          tal:define="var string:use inner;">
       var: <span tal:replace="var" />
     </div>
   </div>
</div>

Think of a use-macro as more of a tal:replace="structure 
template/macros/m" where no other tal functions are executed.

That help?

Troy

Scott Burchill wrote:
 > Willem Broekema wrote:
 >
 >> Why is 'tal:define' ignored when there's also 'metal:use-macro' ?
 >
 >
 > [ snip ]
 >
 >> <div metal:use-macro="template/macros/m" tal:define="var
 >> python:'use inner'" />
 >
 > [ snip ]
 >
 > This goes directly to a question of mine.  I have documentation
 > (eek!) on what order TAL statements are executed, but nothing about
 > using TAL and METAL in the same tag.  Can you use both in the same
 > tag?  Which gets executed first?  Thanks!
 >
 > --
 >
 > sbb
 >
 > \:)> /:(>
 >
 >
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